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open-nomad/nomad/structs/structs.go

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package structs
import (
"bytes"
"container/heap"
"crypto/md5"
"crypto/sha1"
"crypto/sha256"
"crypto/sha512"
"encoding/base32"
"encoding/base64"
"encoding/hex"
"errors"
"fmt"
"hash/crc32"
"math"
"net"
"os"
"path/filepath"
"reflect"
"regexp"
"sort"
"strconv"
"strings"
"time"
"github.com/hashicorp/consul/lib"
"github.com/hashicorp/cronexpr"
"github.com/hashicorp/go-msgpack/codec"
"github.com/hashicorp/go-multierror"
"github.com/hashicorp/go-version"
"github.com/mitchellh/copystructure"
"golang.org/x/crypto/blake2b"
"github.com/hashicorp/nomad/acl"
"github.com/hashicorp/nomad/command/agent/host"
"github.com/hashicorp/nomad/command/agent/pprof"
"github.com/hashicorp/nomad/helper"
"github.com/hashicorp/nomad/helper/args"
"github.com/hashicorp/nomad/helper/constraints/semver"
"github.com/hashicorp/nomad/helper/uuid"
"github.com/hashicorp/nomad/lib/kheap"
psstructs "github.com/hashicorp/nomad/plugins/shared/structs"
)
var (
// validPolicyName is used to validate a policy name
validPolicyName = regexp.MustCompile("^[a-zA-Z0-9-]{1,128}$")
// b32 is a lowercase base32 encoding for use in URL friendly service hashes
b32 = base32.NewEncoding(strings.ToLower("abcdefghijklmnopqrstuvwxyz234567"))
)
type MessageType uint8
// note: new raft message types need to be added to the end of this
// list of contents
const (
NodeRegisterRequestType MessageType = 0
NodeDeregisterRequestType MessageType = 1
NodeUpdateStatusRequestType MessageType = 2
NodeUpdateDrainRequestType MessageType = 3
JobRegisterRequestType MessageType = 4
JobDeregisterRequestType MessageType = 5
EvalUpdateRequestType MessageType = 6
EvalDeleteRequestType MessageType = 7
AllocUpdateRequestType MessageType = 8
AllocClientUpdateRequestType MessageType = 9
ReconcileJobSummariesRequestType MessageType = 10
VaultAccessorRegisterRequestType MessageType = 11
VaultAccessorDeregisterRequestType MessageType = 12
ApplyPlanResultsRequestType MessageType = 13
DeploymentStatusUpdateRequestType MessageType = 14
DeploymentPromoteRequestType MessageType = 15
DeploymentAllocHealthRequestType MessageType = 16
DeploymentDeleteRequestType MessageType = 17
JobStabilityRequestType MessageType = 18
ACLPolicyUpsertRequestType MessageType = 19
ACLPolicyDeleteRequestType MessageType = 20
ACLTokenUpsertRequestType MessageType = 21
ACLTokenDeleteRequestType MessageType = 22
ACLTokenBootstrapRequestType MessageType = 23
AutopilotRequestType MessageType = 24
UpsertNodeEventsType MessageType = 25
JobBatchDeregisterRequestType MessageType = 26
AllocUpdateDesiredTransitionRequestType MessageType = 27
NodeUpdateEligibilityRequestType MessageType = 28
BatchNodeUpdateDrainRequestType MessageType = 29
SchedulerConfigRequestType MessageType = 30
NodeBatchDeregisterRequestType MessageType = 31
ClusterMetadataRequestType MessageType = 32
ServiceIdentityAccessorRegisterRequestType MessageType = 33
ServiceIdentityAccessorDeregisterRequestType MessageType = 34
CSIVolumeRegisterRequestType MessageType = 35
CSIVolumeDeregisterRequestType MessageType = 36
CSIVolumeClaimRequestType MessageType = 37
ScalingEventRegisterRequestType MessageType = 38
CSIVolumeClaimBatchRequestType MessageType = 39
CSIPluginDeleteRequestType MessageType = 40
EventSinkUpsertRequestType MessageType = 41
EventSinkDeleteRequestType MessageType = 42
BatchEventSinkUpdateProgressType MessageType = 43
// Namespace types were moved from enterprise and therefore start at 64
NamespaceUpsertRequestType MessageType = 64
NamespaceDeleteRequestType MessageType = 65
)
const (
// IgnoreUnknownTypeFlag is set along with a MessageType
// to indicate that the message type can be safely ignored
// if it is not recognized. This is for future proofing, so
// that new commands can be added in a way that won't cause
// old servers to crash when the FSM attempts to process them.
IgnoreUnknownTypeFlag MessageType = 128
// MsgTypeTestSetup is used during testing when calling state store
// methods directly that require an FSM MessageType
MsgTypeTestSetup MessageType = IgnoreUnknownTypeFlag
// ApiMajorVersion is returned as part of the Status.Version request.
// It should be incremented anytime the APIs are changed in a way
// that would break clients for sane client versioning.
ApiMajorVersion = 1
// ApiMinorVersion is returned as part of the Status.Version request.
// It should be incremented anytime the APIs are changed to allow
// for sane client versioning. Minor changes should be compatible
// within the major version.
ApiMinorVersion = 1
ProtocolVersion = "protocol"
APIMajorVersion = "api.major"
APIMinorVersion = "api.minor"
GetterModeAny = "any"
GetterModeFile = "file"
GetterModeDir = "dir"
// maxPolicyDescriptionLength limits a policy description length
maxPolicyDescriptionLength = 256
// maxTokenNameLength limits a ACL token name length
maxTokenNameLength = 256
// ACLClientToken and ACLManagementToken are the only types of tokens
ACLClientToken = "client"
ACLManagementToken = "management"
// DefaultNamespace is the default namespace.
DefaultNamespace = "default"
DefaultNamespaceDescription = "Default shared namespace"
// AllNamespacesSentinel is the value used as a namespace RPC value
// to indicate that endpoints must search in all namespaces
AllNamespacesSentinel = "*"
// maxNamespaceDescriptionLength limits a namespace description length
maxNamespaceDescriptionLength = 256
// JitterFraction is a the limit to the amount of jitter we apply
// to a user specified MaxQueryTime. We divide the specified time by
// the fraction. So 16 == 6.25% limit of jitter. This jitter is also
// applied to RPCHoldTimeout.
JitterFraction = 16
// MaxRetainedNodeEvents is the maximum number of node events that will be
// retained for a single node
MaxRetainedNodeEvents = 10
// MaxRetainedNodeScores is the number of top scoring nodes for which we
// retain scoring metadata
MaxRetainedNodeScores = 5
// Normalized scorer name
NormScorerName = "normalized-score"
// MaxBlockingRPCQueryTime is used to bound the limit of a blocking query
MaxBlockingRPCQueryTime = 300 * time.Second
// DefaultBlockingRPCQueryTime is the amount of time we block waiting for a change
// if no time is specified. Previously we would wait the MaxBlockingRPCQueryTime.
DefaultBlockingRPCQueryTime = 300 * time.Second
)
var (
// validNamespaceName is used to validate a namespace name
validNamespaceName = regexp.MustCompile("^[a-zA-Z0-9-]{1,128}$")
)
// Context defines the scope in which a search for Nomad object operates, and
// is also used to query the matching index value for this context
type Context string
const (
Allocs Context = "allocs"
Deployments Context = "deployment"
Evals Context = "evals"
Jobs Context = "jobs"
Nodes Context = "nodes"
Namespaces Context = "namespaces"
Quotas Context = "quotas"
All Context = "all"
Plugins Context = "plugins"
Volumes Context = "volumes"
)
// NamespacedID is a tuple of an ID and a namespace
type NamespacedID struct {
ID string
Namespace string
}
// NewNamespacedID returns a new namespaced ID given the ID and namespace
func NewNamespacedID(id, ns string) NamespacedID {
return NamespacedID{
ID: id,
Namespace: ns,
}
}
func (n NamespacedID) String() string {
return fmt.Sprintf("<ns: %q, id: %q>", n.Namespace, n.ID)
}
// RPCInfo is used to describe common information about query
type RPCInfo interface {
RequestRegion() string
IsRead() bool
AllowStaleRead() bool
IsForwarded() bool
SetForwarded()
HasTimedOut(since time.Time, rpcHoldTimeout time.Duration) bool
}
// InternalRpcInfo allows adding internal RPC metadata to an RPC. This struct
// should NOT be replicated in the API package as it is internal only.
type InternalRpcInfo struct {
// Forwarded marks whether the RPC has been forwarded.
Forwarded bool
}
// IsForwarded returns whether the RPC is forwarded from another server.
func (i *InternalRpcInfo) IsForwarded() bool {
return i.Forwarded
}
// SetForwarded marks that the RPC is being forwarded from another server.
func (i *InternalRpcInfo) SetForwarded() {
i.Forwarded = true
}
// QueryOptions is used to specify various flags for read queries
type QueryOptions struct {
// The target region for this query
Region string
// Namespace is the target namespace for the query.
//
// Since handlers do not have a default value set they should access
// the Namespace via the RequestNamespace method.
//
// Requests accessing specific namespaced objects must check ACLs
// against the namespace of the object, not the namespace in the
// request.
Namespace string
// If set, wait until query exceeds given index. Must be provided
// with MaxQueryTime.
MinQueryIndex uint64
// Provided with MinQueryIndex to wait for change.
MaxQueryTime time.Duration
// If set, any follower can service the request. Results
// may be arbitrarily stale.
AllowStale bool
// If set, used as prefix for resource list searches
Prefix string
// AuthToken is secret portion of the ACL token used for the request
AuthToken string
InternalRpcInfo
}
func (q QueryOptions) RequestRegion() string {
return q.Region
}
// RequestNamespace returns the request's namespace or the default namespace if
// no explicit namespace was sent.
//
// Requests accessing specific namespaced objects must check ACLs against the
// namespace of the object, not the namespace in the request.
func (q QueryOptions) RequestNamespace() string {
if q.Namespace == "" {
return DefaultNamespace
}
return q.Namespace
}
// QueryOption only applies to reads, so always true
func (q QueryOptions) IsRead() bool {
return true
}
func (q QueryOptions) AllowStaleRead() bool {
return q.AllowStale
}
func (q QueryOptions) HasTimedOut(start time.Time, rpcHoldTimeout time.Duration) bool {
if q.MinQueryIndex > 0 {
// Restrict the max query time, and ensure there is always one
if q.MaxQueryTime > MaxBlockingRPCQueryTime {
q.MaxQueryTime = MaxBlockingRPCQueryTime
} else if q.MaxQueryTime <= 0 {
q.MaxQueryTime = DefaultBlockingRPCQueryTime
}
q.MaxQueryTime += lib.RandomStagger(q.MaxQueryTime / JitterFraction)
return time.Since(start) > (q.MaxQueryTime + rpcHoldTimeout)
}
return time.Since(start) > rpcHoldTimeout
}
// AgentPprofRequest is used to request a pprof report for a given node.
type AgentPprofRequest struct {
// ReqType specifies the profile to use
ReqType pprof.ReqType
// Profile specifies the runtime/pprof profile to lookup and generate.
Profile string
// Seconds is the number of seconds to capture a profile
Seconds int
// Debug specifies if pprof profile should inclue debug output
Debug int
// GC specifies if the profile should call runtime.GC() before
// running its profile. This is only used for "heap" profiles
GC int
// NodeID is the node we want to track the logs of
NodeID string
// ServerID is the server we want to track the logs of
ServerID string
QueryOptions
}
// AgentPprofResponse is used to return a generated pprof profile
type AgentPprofResponse struct {
// ID of the agent that fulfilled the request
AgentID string
// Payload is the generated pprof profile
Payload []byte
// HTTPHeaders are a set of key value pairs to be applied as
// HTTP headers for a specific runtime profile
HTTPHeaders map[string]string
}
type WriteRequest struct {
// The target region for this write
Region string
// Namespace is the target namespace for the write.
//
// Since RPC handlers do not have a default value set they should
// access the Namespace via the RequestNamespace method.
//
// Requests accessing specific namespaced objects must check ACLs
// against the namespace of the object, not the namespace in the
// request.
Namespace string
// AuthToken is secret portion of the ACL token used for the request
AuthToken string
InternalRpcInfo
}
func (w WriteRequest) RequestRegion() string {
// The target region for this request
return w.Region
}
// RequestNamespace returns the request's namespace or the default namespace if
// no explicit namespace was sent.
//
// Requests accessing specific namespaced objects must check ACLs against the
// namespace of the object, not the namespace in the request.
func (w WriteRequest) RequestNamespace() string {
if w.Namespace == "" {
return DefaultNamespace
}
return w.Namespace
}
// WriteRequest only applies to writes, always false
func (w WriteRequest) IsRead() bool {
return false
}
func (w WriteRequest) AllowStaleRead() bool {
return false
}
func (w WriteRequest) HasTimedOut(start time.Time, rpcHoldTimeout time.Duration) bool {
return time.Since(start) > rpcHoldTimeout
}
// QueryMeta allows a query response to include potentially
// useful metadata about a query
type QueryMeta struct {
// This is the index associated with the read
Index uint64
// If AllowStale is used, this is time elapsed since
// last contact between the follower and leader. This
// can be used to gauge staleness.
LastContact time.Duration
// Used to indicate if there is a known leader node
KnownLeader bool
}
// WriteMeta allows a write response to include potentially
// useful metadata about the write
type WriteMeta struct {
// This is the index associated with the write
Index uint64
}
// NodeRegisterRequest is used for Node.Register endpoint
// to register a node as being a schedulable entity.
type NodeRegisterRequest struct {
Node *Node
NodeEvent *NodeEvent
WriteRequest
}
// NodeDeregisterRequest is used for Node.Deregister endpoint
// to deregister a node as being a schedulable entity.
type NodeDeregisterRequest struct {
NodeID string
WriteRequest
}
// NodeBatchDeregisterRequest is used for Node.BatchDeregister endpoint
// to deregister a batch of nodes from being schedulable entities.
type NodeBatchDeregisterRequest struct {
NodeIDs []string
WriteRequest
}
// NodeServerInfo is used to in NodeUpdateResponse to return Nomad server
// information used in RPC server lists.
type NodeServerInfo struct {
// RPCAdvertiseAddr is the IP endpoint that a Nomad Server wishes to
// be contacted at for RPCs.
RPCAdvertiseAddr string
// RpcMajorVersion is the major version number the Nomad Server
// supports
RPCMajorVersion int32
// RpcMinorVersion is the minor version number the Nomad Server
// supports
RPCMinorVersion int32
// Datacenter is the datacenter that a Nomad server belongs to
Datacenter string
}
// NodeUpdateStatusRequest is used for Node.UpdateStatus endpoint
// to update the status of a node.
type NodeUpdateStatusRequest struct {
NodeID string
Status string
NodeEvent *NodeEvent
UpdatedAt int64
WriteRequest
}
// NodeUpdateDrainRequest is used for updating the drain strategy
type NodeUpdateDrainRequest struct {
NodeID string
DrainStrategy *DrainStrategy
// COMPAT Remove in version 0.10
// As part of Nomad 0.8 we have deprecated the drain boolean in favor of a
// drain strategy but we need to handle the upgrade path where the Raft log
// contains drain updates with just the drain boolean being manipulated.
Drain bool
// MarkEligible marks the node as eligible if removing the drain strategy.
MarkEligible bool
// NodeEvent is the event added to the node
NodeEvent *NodeEvent
// UpdatedAt represents server time of receiving request
UpdatedAt int64
WriteRequest
}
// BatchNodeUpdateDrainRequest is used for updating the drain strategy for a
// batch of nodes
type BatchNodeUpdateDrainRequest struct {
// Updates is a mapping of nodes to their updated drain strategy
Updates map[string]*DrainUpdate
// NodeEvents is a mapping of the node to the event to add to the node
NodeEvents map[string]*NodeEvent
// UpdatedAt represents server time of receiving request
UpdatedAt int64
WriteRequest
}
// DrainUpdate is used to update the drain of a node
type DrainUpdate struct {
// DrainStrategy is the new strategy for the node
DrainStrategy *DrainStrategy
// MarkEligible marks the node as eligible if removing the drain strategy.
MarkEligible bool
}
// NodeUpdateEligibilityRequest is used for updating the scheduling eligibility
type NodeUpdateEligibilityRequest struct {
NodeID string
Eligibility string
// NodeEvent is the event added to the node
NodeEvent *NodeEvent
// UpdatedAt represents server time of receiving request
UpdatedAt int64
WriteRequest
}
// NodeEvaluateRequest is used to re-evaluate the node
type NodeEvaluateRequest struct {
NodeID string
WriteRequest
}
// NodeSpecificRequest is used when we just need to specify a target node
type NodeSpecificRequest struct {
NodeID string
SecretID string
QueryOptions
}
// SearchResponse is used to return matches and information about whether
// the match list is truncated specific to each type of context.
type SearchResponse struct {
// Map of context types to ids which match a specified prefix
Matches map[Context][]string
// Truncations indicates whether the matches for a particular context have
// been truncated
Truncations map[Context]bool
QueryMeta
}
// SearchRequest is used to parameterize a request, and returns a
// list of matches made up of jobs, allocations, evaluations, and/or nodes,
// along with whether or not the information returned is truncated.
type SearchRequest struct {
// Prefix is what ids are matched to. I.e, if the given prefix were
// "a", potential matches might be "abcd" or "aabb"
Prefix string
// Context is the type that can be matched against. A context can be a job,
// node, evaluation, allocation, or empty (indicated every context should be
// matched)
Context Context
QueryOptions
}
// JobRegisterRequest is used for Job.Register endpoint
// to register a job as being a schedulable entity.
type JobRegisterRequest struct {
Job *Job
// If EnforceIndex is set then the job will only be registered if the passed
// JobModifyIndex matches the current Jobs index. If the index is zero, the
// register only occurs if the job is new.
EnforceIndex bool
JobModifyIndex uint64
// PreserveCounts indicates that during job update, existing task group
// counts should be preserved, over those specified in the new job spec
// PreserveCounts is ignored for newly created jobs.
PreserveCounts bool
// PolicyOverride is set when the user is attempting to override any policies
PolicyOverride bool
// Eval is the evaluation that is associated with the job registration
Eval *Evaluation
WriteRequest
}
// JobDeregisterRequest is used for Job.Deregister endpoint
// to deregister a job as being a schedulable entity.
type JobDeregisterRequest struct {
JobID string
// Purge controls whether the deregister purges the job from the system or
// whether the job is just marked as stopped and will be removed by the
// garbage collector
Purge bool
// Global controls whether all regions of a multi-region job are
// deregistered. It is ignored for single-region jobs.
Global bool
// Eval is the evaluation to create that's associated with job deregister
Eval *Evaluation
WriteRequest
}
// JobBatchDeregisterRequest is used to batch deregister jobs and upsert
// evaluations.
type JobBatchDeregisterRequest struct {
// Jobs is the set of jobs to deregister
Jobs map[NamespacedID]*JobDeregisterOptions
// Evals is the set of evaluations to create.
Evals []*Evaluation
WriteRequest
}
// JobDeregisterOptions configures how a job is deregistered.
type JobDeregisterOptions struct {
// Purge controls whether the deregister purges the job from the system or
// whether the job is just marked as stopped and will be removed by the
// garbage collector
Purge bool
}
// JobEvaluateRequest is used when we just need to re-evaluate a target job
type JobEvaluateRequest struct {
JobID string
EvalOptions EvalOptions
WriteRequest
}
// EvalOptions is used to encapsulate options when forcing a job evaluation
type EvalOptions struct {
ForceReschedule bool
}
// JobSpecificRequest is used when we just need to specify a target job
type JobSpecificRequest struct {
JobID string
All bool
QueryOptions
}
// JobListRequest is used to parameterize a list request
type JobListRequest struct {
QueryOptions
}
// JobPlanRequest is used for the Job.Plan endpoint to trigger a dry-run
// evaluation of the Job.
type JobPlanRequest struct {
Job *Job
Diff bool // Toggles an annotated diff
// PolicyOverride is set when the user is attempting to override any policies
PolicyOverride bool
WriteRequest
}
// JobScaleRequest is used for the Job.Scale endpoint to scale one of the
// scaling targets in a job
type JobScaleRequest struct {
Namespace string
JobID string
Target map[string]string
Count *int64
Message string
Error bool
Meta map[string]interface{}
// PolicyOverride is set when the user is attempting to override any policies
PolicyOverride bool
WriteRequest
}
// JobSummaryRequest is used when we just need to get a specific job summary
type JobSummaryRequest struct {
JobID string
QueryOptions
}
// JobScaleStatusRequest is used to get the scale status for a job
type JobScaleStatusRequest struct {
JobID string
QueryOptions
}
// JobDispatchRequest is used to dispatch a job based on a parameterized job
type JobDispatchRequest struct {
JobID string
Payload []byte
Meta map[string]string
WriteRequest
}
// JobValidateRequest is used to validate a job
type JobValidateRequest struct {
Job *Job
WriteRequest
}
// JobRevertRequest is used to revert a job to a prior version.
type JobRevertRequest struct {
// JobID is the ID of the job being reverted
JobID string
// JobVersion the version to revert to.
JobVersion uint64
// EnforcePriorVersion if set will enforce that the job is at the given
// version before reverting.
EnforcePriorVersion *uint64
// ConsulToken is the Consul token that proves the submitter of the job revert
// has access to the Service Identity policies associated with the job's
// Consul Connect enabled services. This field is only used to transfer the
// token and is not stored after the Job revert.
ConsulToken string
// VaultToken is the Vault token that proves the submitter of the job revert
// has access to any Vault policies specified in the targeted job version. This
// field is only used to transfer the token and is not stored after the Job
// revert.
VaultToken string
WriteRequest
}
// JobStabilityRequest is used to marked a job as stable.
type JobStabilityRequest struct {
// Job to set the stability on
JobID string
JobVersion uint64
// Set the stability
Stable bool
WriteRequest
}
// JobStabilityResponse is the response when marking a job as stable.
type JobStabilityResponse struct {
WriteMeta
}
// NodeListRequest is used to parameterize a list request
type NodeListRequest struct {
QueryOptions
Fields *NodeStubFields
}
// EvalUpdateRequest is used for upserting evaluations.
type EvalUpdateRequest struct {
Evals []*Evaluation
EvalToken string
WriteRequest
}
// EvalDeleteRequest is used for deleting an evaluation.
type EvalDeleteRequest struct {
Evals []string
Allocs []string
WriteRequest
}
// EvalSpecificRequest is used when we just need to specify a target evaluation
type EvalSpecificRequest struct {
EvalID string
QueryOptions
}
// EvalAckRequest is used to Ack/Nack a specific evaluation
type EvalAckRequest struct {
EvalID string
Token string
WriteRequest
}
// EvalDequeueRequest is used when we want to dequeue an evaluation
type EvalDequeueRequest struct {
Schedulers []string
Timeout time.Duration
SchedulerVersion uint16
WriteRequest
}
// EvalListRequest is used to list the evaluations
type EvalListRequest struct {
QueryOptions
}
// PlanRequest is used to submit an allocation plan to the leader
type PlanRequest struct {
Plan *Plan
WriteRequest
}
// ApplyPlanResultsRequest is used by the planner to apply a Raft transaction
// committing the result of a plan.
type ApplyPlanResultsRequest struct {
// AllocUpdateRequest holds the allocation updates to be made by the
// scheduler.
AllocUpdateRequest
// Deployment is the deployment created or updated as a result of a
// scheduling event.
Deployment *Deployment
// DeploymentUpdates is a set of status updates to apply to the given
// deployments. This allows the scheduler to cancel any unneeded deployment
// because the job is stopped or the update block is removed.
DeploymentUpdates []*DeploymentStatusUpdate
// EvalID is the eval ID of the plan being applied. The modify index of the
// evaluation is updated as part of applying the plan to ensure that subsequent
// scheduling events for the same job will wait for the index that last produced
// state changes. This is necessary for blocked evaluations since they can be
// processed many times, potentially making state updates, without the state of
// the evaluation itself being updated.
EvalID string
// COMPAT 0.11
// NodePreemptions is a slice of allocations from other lower priority jobs
// that are preempted. Preempted allocations are marked as evicted.
// Deprecated: Replaced with AllocsPreempted which contains only the diff
NodePreemptions []*Allocation
// AllocsPreempted is a slice of allocation diffs from other lower priority jobs
// that are preempted. Preempted allocations are marked as evicted.
AllocsPreempted []*AllocationDiff
// PreemptionEvals is a slice of follow up evals for jobs whose allocations
// have been preempted to place allocs in this plan
PreemptionEvals []*Evaluation
}
// AllocUpdateRequest is used to submit changes to allocations, either
// to cause evictions or to assign new allocations. Both can be done
// within a single transaction
type AllocUpdateRequest struct {
// COMPAT 0.11
// Alloc is the list of new allocations to assign
// Deprecated: Replaced with two separate slices, one containing stopped allocations
// and another containing updated allocations
Alloc []*Allocation
// Allocations to stop. Contains only the diff, not the entire allocation
AllocsStopped []*AllocationDiff
// New or updated allocations
AllocsUpdated []*Allocation
// Evals is the list of new evaluations to create
// Evals are valid only when used in the Raft RPC
Evals []*Evaluation
// Job is the shared parent job of the allocations.
// It is pulled out since it is common to reduce payload size.
Job *Job
WriteRequest
}
// AllocUpdateDesiredTransitionRequest is used to submit changes to allocations
// desired transition state.
type AllocUpdateDesiredTransitionRequest struct {
// Allocs is the mapping of allocation ids to their desired state
// transition
Allocs map[string]*DesiredTransition
// Evals is the set of evaluations to create
Evals []*Evaluation
WriteRequest
}
// AllocStopRequest is used to stop and reschedule a running Allocation.
type AllocStopRequest struct {
AllocID string
WriteRequest
}
// AllocStopResponse is the response to an `AllocStopRequest`
type AllocStopResponse struct {
// EvalID is the id of the follow up evalution for the rescheduled alloc.
EvalID string
WriteMeta
}
// AllocListRequest is used to request a list of allocations
type AllocListRequest struct {
QueryOptions
Fields *AllocStubFields
}
// AllocSpecificRequest is used to query a specific allocation
type AllocSpecificRequest struct {
AllocID string
QueryOptions
}
// AllocSignalRequest is used to signal a specific allocation
type AllocSignalRequest struct {
AllocID string
Task string
Signal string
QueryOptions
}
// AllocsGetRequest is used to query a set of allocations
type AllocsGetRequest struct {
AllocIDs []string
QueryOptions
}
// AllocRestartRequest is used to restart a specific allocations tasks.
type AllocRestartRequest struct {
AllocID string
TaskName string
QueryOptions
}
// PeriodicForceRequest is used to force a specific periodic job.
type PeriodicForceRequest struct {
JobID string
WriteRequest
}
// ServerMembersResponse has the list of servers in a cluster
type ServerMembersResponse struct {
ServerName string
ServerRegion string
ServerDC string
Members []*ServerMember
}
// ServerMember holds information about a Nomad server agent in a cluster
type ServerMember struct {
Name string
Addr net.IP
Port uint16
Tags map[string]string
Status string
ProtocolMin uint8
ProtocolMax uint8
ProtocolCur uint8
DelegateMin uint8
DelegateMax uint8
DelegateCur uint8
}
// ClusterMetadata is used to store per-cluster metadata.
type ClusterMetadata struct {
ClusterID string
CreateTime int64
}
// DeriveVaultTokenRequest is used to request wrapped Vault tokens for the
// following tasks in the given allocation
type DeriveVaultTokenRequest struct {
NodeID string
SecretID string
AllocID string
Tasks []string
QueryOptions
}
// VaultAccessorsRequest is used to operate on a set of Vault accessors
type VaultAccessorsRequest struct {
Accessors []*VaultAccessor
}
// VaultAccessor is a reference to a created Vault token on behalf of
// an allocation's task.
type VaultAccessor struct {
AllocID string
Task string
NodeID string
Accessor string
CreationTTL int
// Raft Indexes
CreateIndex uint64
}
// DeriveVaultTokenResponse returns the wrapped tokens for each requested task
type DeriveVaultTokenResponse struct {
// Tasks is a mapping between the task name and the wrapped token
Tasks map[string]string
// Error stores any error that occurred. Errors are stored here so we can
// communicate whether it is retryable
Error *RecoverableError
QueryMeta
}
// GenericRequest is used to request where no
// specific information is needed.
type GenericRequest struct {
QueryOptions
}
// DeploymentListRequest is used to list the deployments
type DeploymentListRequest struct {
QueryOptions
}
// DeploymentDeleteRequest is used for deleting deployments.
type DeploymentDeleteRequest struct {
Deployments []string
WriteRequest
}
// DeploymentStatusUpdateRequest is used to update the status of a deployment as
// well as optionally creating an evaluation atomically.
type DeploymentStatusUpdateRequest struct {
// Eval, if set, is used to create an evaluation at the same time as
// updating the status of a deployment.
Eval *Evaluation
// DeploymentUpdate is a status update to apply to the given
// deployment.
DeploymentUpdate *DeploymentStatusUpdate
// Job is used to optionally upsert a job. This is used when setting the
// allocation health results in a deployment failure and the deployment
// auto-reverts to the latest stable job.
Job *Job
}
// DeploymentAllocHealthRequest is used to set the health of a set of
// allocations as part of a deployment.
type DeploymentAllocHealthRequest struct {
DeploymentID string
// Marks these allocations as healthy, allow further allocations
// to be rolled.
HealthyAllocationIDs []string
// Any unhealthy allocations fail the deployment
UnhealthyAllocationIDs []string
WriteRequest
}
// ApplyDeploymentAllocHealthRequest is used to apply an alloc health request via Raft
type ApplyDeploymentAllocHealthRequest struct {
DeploymentAllocHealthRequest
// Timestamp is the timestamp to use when setting the allocations health.
Timestamp time.Time
// An optional field to update the status of a deployment
DeploymentUpdate *DeploymentStatusUpdate
// Job is used to optionally upsert a job. This is used when setting the
// allocation health results in a deployment failure and the deployment
// auto-reverts to the latest stable job.
Job *Job
// An optional evaluation to create after promoting the canaries
Eval *Evaluation
}
// DeploymentPromoteRequest is used to promote task groups in a deployment
type DeploymentPromoteRequest struct {
DeploymentID string
// All is to promote all task groups
All bool
// Groups is used to set the promotion status per task group
Groups []string
WriteRequest
}
// ApplyDeploymentPromoteRequest is used to apply a promotion request via Raft
type ApplyDeploymentPromoteRequest struct {
DeploymentPromoteRequest
// An optional evaluation to create after promoting the canaries
Eval *Evaluation
}
// DeploymentPauseRequest is used to pause a deployment
type DeploymentPauseRequest struct {
DeploymentID string
// Pause sets the pause status
Pause bool
WriteRequest
}
// DeploymentRunRequest is used to remotely start a pending deployment.
// Used only for multiregion deployments.
type DeploymentRunRequest struct {
DeploymentID string
WriteRequest
}
// DeploymentUnblockRequest is used to remotely unblock a deployment.
// Used only for multiregion deployments.
type DeploymentUnblockRequest struct {
DeploymentID string
WriteRequest
}
// DeploymentCancelRequest is used to remotely cancel a deployment.
// Used only for multiregion deployments.
type DeploymentCancelRequest struct {
DeploymentID string
WriteRequest
}
// DeploymentSpecificRequest is used to make a request specific to a particular
// deployment
type DeploymentSpecificRequest struct {
DeploymentID string
QueryOptions
}
// DeploymentFailRequest is used to fail a particular deployment
type DeploymentFailRequest struct {
DeploymentID string
WriteRequest
}
// ScalingPolicySpecificRequest is used when we just need to specify a target scaling policy
type ScalingPolicySpecificRequest struct {
ID string
QueryOptions
}
// SingleScalingPolicyResponse is used to return a single job
type SingleScalingPolicyResponse struct {
Policy *ScalingPolicy
QueryMeta
}
// ScalingPolicyListRequest is used to parameterize a scaling policy list request
type ScalingPolicyListRequest struct {
Job string
Type string
QueryOptions
}
// ScalingPolicyListResponse is used for a list request
type ScalingPolicyListResponse struct {
Policies []*ScalingPolicyListStub
QueryMeta
}
// SingleDeploymentResponse is used to respond with a single deployment
type SingleDeploymentResponse struct {
Deployment *Deployment
QueryMeta
}
// GenericResponse is used to respond to a request where no
// specific response information is needed.
type GenericResponse struct {
WriteMeta
}
// VersionResponse is used for the Status.Version response
type VersionResponse struct {
Build string
Versions map[string]int
QueryMeta
}
// JobRegisterResponse is used to respond to a job registration
type JobRegisterResponse struct {
EvalID string
EvalCreateIndex uint64
JobModifyIndex uint64
// Warnings contains any warnings about the given job. These may include
// deprecation warnings.
Warnings string
QueryMeta
}
// JobDeregisterResponse is used to respond to a job deregistration
type JobDeregisterResponse struct {
EvalID string
EvalCreateIndex uint64
JobModifyIndex uint64
VolumeEvalID string
VolumeEvalIndex uint64
QueryMeta
}
// JobBatchDeregisterResponse is used to respond to a batch job deregistration
type JobBatchDeregisterResponse struct {
// JobEvals maps the job to its created evaluation
JobEvals map[NamespacedID]string
QueryMeta
}
// JobValidateResponse is the response from validate request
type JobValidateResponse struct {
// DriverConfigValidated indicates whether the agent validated the driver
// config
DriverConfigValidated bool
// ValidationErrors is a list of validation errors
ValidationErrors []string
// Error is a string version of any error that may have occurred
Error string
// Warnings contains any warnings about the given job. These may include
// deprecation warnings.
Warnings string
}
// NodeUpdateResponse is used to respond to a node update
type NodeUpdateResponse struct {
HeartbeatTTL time.Duration
EvalIDs []string
EvalCreateIndex uint64
NodeModifyIndex uint64
// Features informs clients what enterprise features are allowed
Features uint64
// LeaderRPCAddr is the RPC address of the current Raft Leader. If
// empty, the current Nomad Server is in the minority of a partition.
LeaderRPCAddr string
// NumNodes is the number of Nomad nodes attached to this quorum of
// Nomad Servers at the time of the response. This value can
// fluctuate based on the health of the cluster between heartbeats.
NumNodes int32
// Servers is the full list of known Nomad servers in the local
// region.
Servers []*NodeServerInfo
QueryMeta
}
// NodeDrainUpdateResponse is used to respond to a node drain update
type NodeDrainUpdateResponse struct {
NodeModifyIndex uint64
EvalIDs []string
EvalCreateIndex uint64
WriteMeta
}
// NodeEligibilityUpdateResponse is used to respond to a node eligibility update
type NodeEligibilityUpdateResponse struct {
NodeModifyIndex uint64
EvalIDs []string
EvalCreateIndex uint64
WriteMeta
}
// NodeAllocsResponse is used to return allocs for a single node
type NodeAllocsResponse struct {
Allocs []*Allocation
QueryMeta
}
// NodeClientAllocsResponse is used to return allocs meta data for a single node
type NodeClientAllocsResponse struct {
Allocs map[string]uint64
// MigrateTokens are used when ACLs are enabled to allow cross node,
// authenticated access to sticky volumes
MigrateTokens map[string]string
QueryMeta
}
// SingleNodeResponse is used to return a single node
type SingleNodeResponse struct {
Node *Node
QueryMeta
}
// NodeListResponse is used for a list request
type NodeListResponse struct {
Nodes []*NodeListStub
QueryMeta
}
// SingleJobResponse is used to return a single job
type SingleJobResponse struct {
Job *Job
QueryMeta
}
// JobSummaryResponse is used to return a single job summary
type JobSummaryResponse struct {
JobSummary *JobSummary
QueryMeta
}
// JobScaleStatusResponse is used to return the scale status for a job
type JobScaleStatusResponse struct {
JobScaleStatus *JobScaleStatus
QueryMeta
}
type JobScaleStatus struct {
JobID string
Namespace string
JobCreateIndex uint64
JobModifyIndex uint64
JobStopped bool
TaskGroups map[string]*TaskGroupScaleStatus
}
// TaskGroupScaleStatus is used to return the scale status for a given task group
type TaskGroupScaleStatus struct {
Desired int
Placed int
Running int
Healthy int
Unhealthy int
Events []*ScalingEvent
}
type JobDispatchResponse struct {
DispatchedJobID string
EvalID string
EvalCreateIndex uint64
JobCreateIndex uint64
WriteMeta
}
// JobListResponse is used for a list request
type JobListResponse struct {
Jobs []*JobListStub
QueryMeta
}
// JobVersionsRequest is used to get a jobs versions
type JobVersionsRequest struct {
JobID string
Diffs bool
QueryOptions
}
// JobVersionsResponse is used for a job get versions request
type JobVersionsResponse struct {
Versions []*Job
Diffs []*JobDiff
QueryMeta
}
// JobPlanResponse is used to respond to a job plan request
type JobPlanResponse struct {
// Annotations stores annotations explaining decisions the scheduler made.
Annotations *PlanAnnotations
// FailedTGAllocs is the placement failures per task group.
FailedTGAllocs map[string]*AllocMetric
// JobModifyIndex is the modification index of the job. The value can be
// used when running `nomad run` to ensure that the Job wasn’t modified
// since the last plan. If the job is being created, the value is zero.
JobModifyIndex uint64
// CreatedEvals is the set of evaluations created by the scheduler. The
// reasons for this can be rolling-updates or blocked evals.
CreatedEvals []*Evaluation
// Diff contains the diff of the job and annotations on whether the change
// causes an in-place update or create/destroy
Diff *JobDiff
// NextPeriodicLaunch is the time duration till the job would be launched if
// submitted.
NextPeriodicLaunch time.Time
// Warnings contains any warnings about the given job. These may include
// deprecation warnings.
Warnings string
WriteMeta
}
// SingleAllocResponse is used to return a single allocation
type SingleAllocResponse struct {
Alloc *Allocation
QueryMeta
}
// AllocsGetResponse is used to return a set of allocations
type AllocsGetResponse struct {
Allocs []*Allocation
QueryMeta
}
// JobAllocationsResponse is used to return the allocations for a job
type JobAllocationsResponse struct {
Allocations []*AllocListStub
QueryMeta
}
// JobEvaluationsResponse is used to return the evaluations for a job
type JobEvaluationsResponse struct {
Evaluations []*Evaluation
QueryMeta
}
// SingleEvalResponse is used to return a single evaluation
type SingleEvalResponse struct {
Eval *Evaluation
QueryMeta
}
// EvalDequeueResponse is used to return from a dequeue
type EvalDequeueResponse struct {
Eval *Evaluation
Token string
// WaitIndex is the Raft index the worker should wait until invoking the
// scheduler.
WaitIndex uint64
QueryMeta
}
// GetWaitIndex is used to retrieve the Raft index in which state should be at
// or beyond before invoking the scheduler.
func (e *EvalDequeueResponse) GetWaitIndex() uint64 {
// Prefer the wait index sent. This will be populated on all responses from
// 0.7.0 and above
if e.WaitIndex != 0 {
return e.WaitIndex
} else if e.Eval != nil {
return e.Eval.ModifyIndex
}
// This should never happen
return 1
}
// PlanResponse is used to return from a PlanRequest
type PlanResponse struct {
Result *PlanResult
WriteMeta
}
// AllocListResponse is used for a list request
type AllocListResponse struct {
Allocations []*AllocListStub
QueryMeta
}
// DeploymentListResponse is used for a list request
type DeploymentListResponse struct {
Deployments []*Deployment
QueryMeta
}
// EvalListResponse is used for a list request
type EvalListResponse struct {
Evaluations []*Evaluation
QueryMeta
}
// EvalAllocationsResponse is used to return the allocations for an evaluation
type EvalAllocationsResponse struct {
Allocations []*AllocListStub
QueryMeta
}
// PeriodicForceResponse is used to respond to a periodic job force launch
type PeriodicForceResponse struct {
EvalID string
EvalCreateIndex uint64
WriteMeta
}
// DeploymentUpdateResponse is used to respond to a deployment change. The
// response will include the modify index of the deployment as well as details
// of any triggered evaluation.
type DeploymentUpdateResponse struct {
EvalID string
EvalCreateIndex uint64
DeploymentModifyIndex uint64
// RevertedJobVersion is the version the job was reverted to. If unset, the
// job wasn't reverted
RevertedJobVersion *uint64
WriteMeta
}
// NodeConnQueryResponse is used to respond to a query of whether a server has
// a connection to a specific Node
type NodeConnQueryResponse struct {
// Connected indicates whether a connection to the Client exists
Connected bool
// Established marks the time at which the connection was established
Established time.Time
QueryMeta
}
// HostDataRequest is used by /agent/host to retrieve data about the agent's host system. If
// ServerID or NodeID is specified, the request is forwarded to the remote agent
type HostDataRequest struct {
ServerID string
NodeID string
QueryOptions
}
// HostDataResponse contains the HostData content
type HostDataResponse struct {
AgentID string
HostData *host.HostData
}
// EmitNodeEventsRequest is a request to update the node events source
// with a new client-side event
type EmitNodeEventsRequest struct {
// NodeEvents are a map where the key is a node id, and value is a list of
// events for that node
NodeEvents map[string][]*NodeEvent
WriteRequest
}
// EmitNodeEventsResponse is a response to the client about the status of
// the node event source update.
type EmitNodeEventsResponse struct {
WriteMeta
}
const (
NodeEventSubsystemDrain = "Drain"
NodeEventSubsystemDriver = "Driver"
NodeEventSubsystemHeartbeat = "Heartbeat"
NodeEventSubsystemCluster = "Cluster"
NodeEventSubsystemStorage = "Storage"
)
// NodeEvent is a single unit representing a node’s state change
type NodeEvent struct {
Message string
Subsystem string
Details map[string]string
Timestamp time.Time
CreateIndex uint64
}
func (ne *NodeEvent) String() string {
var details []string
for k, v := range ne.Details {
details = append(details, fmt.Sprintf("%s: %s", k, v))
}
return fmt.Sprintf("Message: %s, Subsystem: %s, Details: %s, Timestamp: %s", ne.Message, ne.Subsystem, strings.Join(details, ","), ne.Timestamp.String())
}
func (ne *NodeEvent) Copy() *NodeEvent {
c := new(NodeEvent)
*c = *ne
c.Details = helper.CopyMapStringString(ne.Details)
return c
}
// NewNodeEvent generates a new node event storing the current time as the
// timestamp
func NewNodeEvent() *NodeEvent {
return &NodeEvent{Timestamp: time.Now()}
}
// SetMessage is used to set the message on the node event
func (ne *NodeEvent) SetMessage(msg string) *NodeEvent {
ne.Message = msg
return ne
}
// SetSubsystem is used to set the subsystem on the node event
func (ne *NodeEvent) SetSubsystem(sys string) *NodeEvent {
ne.Subsystem = sys
return ne
}
// SetTimestamp is used to set the timestamp on the node event
func (ne *NodeEvent) SetTimestamp(ts time.Time) *NodeEvent {
ne.Timestamp = ts
return ne
}
// AddDetail is used to add a detail to the node event
func (ne *NodeEvent) AddDetail(k, v string) *NodeEvent {
if ne.Details == nil {
ne.Details = make(map[string]string, 1)
}
ne.Details[k] = v
return ne
}
const (
NodeStatusInit = "initializing"
NodeStatusReady = "ready"
NodeStatusDown = "down"
)
// ShouldDrainNode checks if a given node status should trigger an
// evaluation. Some states don't require any further action.
func ShouldDrainNode(status string) bool {
switch status {
case NodeStatusInit, NodeStatusReady:
return false
case NodeStatusDown:
return true
default:
panic(fmt.Sprintf("unhandled node status %s", status))
}
}
// ValidNodeStatus is used to check if a node status is valid
func ValidNodeStatus(status string) bool {
switch status {
case NodeStatusInit, NodeStatusReady, NodeStatusDown:
return true
default:
return false
}
}
const (
// NodeSchedulingEligible and Ineligible marks the node as eligible or not,
// respectively, for receiving allocations. This is orthoginal to the node
// status being ready.
NodeSchedulingEligible = "eligible"
NodeSchedulingIneligible = "ineligible"
)
// DrainSpec describes a Node's desired drain behavior.
type DrainSpec struct {
// Deadline is the duration after StartTime when the remaining
// allocations on a draining Node should be told to stop.
Deadline time.Duration
// IgnoreSystemJobs allows systems jobs to remain on the node even though it
// has been marked for draining.
IgnoreSystemJobs bool
}
// DrainStrategy describes a Node's drain behavior.
type DrainStrategy struct {
// DrainSpec is the user declared drain specification
DrainSpec
// ForceDeadline is the deadline time for the drain after which drains will
// be forced
ForceDeadline time.Time
// StartedAt is the time the drain process started
StartedAt time.Time
}
func (d *DrainStrategy) Copy() *DrainStrategy {
if d == nil {
return nil
}
nd := new(DrainStrategy)
*nd = *d
return nd
}
// DeadlineTime returns a boolean whether the drain strategy allows an infinite
// duration or otherwise the deadline time. The force drain is captured by the
// deadline time being in the past.
func (d *DrainStrategy) DeadlineTime() (infinite bool, deadline time.Time) {
// Treat the nil case as a force drain so during an upgrade where a node may
// not have a drain strategy but has Drain set to true, it is treated as a
// force to mimick old behavior.
if d == nil {
return false, time.Time{}
}
ns := d.Deadline.Nanoseconds()
switch {
case ns < 0: // Force
return false, time.Time{}
case ns == 0: // Infinite
return true, time.Time{}
default:
return false, d.ForceDeadline
}
}
func (d *DrainStrategy) Equal(o *DrainStrategy) bool {
if d == nil && o == nil {
return true
} else if o != nil && d == nil {
return false
} else if d != nil && o == nil {
return false
}
// Compare values
if d.ForceDeadline != o.ForceDeadline {
return false
} else if d.Deadline != o.Deadline {
return false
} else if d.IgnoreSystemJobs != o.IgnoreSystemJobs {
return false
}
return true
}
// Node is a representation of a schedulable client node
type Node struct {
// ID is a unique identifier for the node. It can be constructed
// by doing a concatenation of the Name and Datacenter as a simple
// approach. Alternatively a UUID may be used.
ID string
// SecretID is an ID that is only known by the Node and the set of Servers.
// It is not accessible via the API and is used to authenticate nodes
// conducting privileged activities.
SecretID string
// Datacenter for this node
Datacenter string
// Node name
Name string
// HTTPAddr is the address on which the Nomad client is listening for http
// requests
HTTPAddr string
// TLSEnabled indicates if the Agent has TLS enabled for the HTTP API
TLSEnabled bool
// Attributes is an arbitrary set of key/value
// data that can be used for constraints. Examples
// include "kernel.name=linux", "arch=386", "driver.docker=1",
// "docker.runtime=1.8.3"
Attributes map[string]string
// NodeResources captures the available resources on the client.
NodeResources *NodeResources
// ReservedResources captures the set resources on the client that are
// reserved from scheduling.
ReservedResources *NodeReservedResources
// Resources is the available resources on the client.
// For example 'cpu=2' 'memory=2048'
// COMPAT(0.10): Remove after 0.10
Resources *Resources
// Reserved is the set of resources that are reserved,
// and should be subtracted from the total resources for
// the purposes of scheduling. This may be provide certain
// high-watermark tolerances or because of external schedulers
// consuming resources.
// COMPAT(0.10): Remove after 0.10
Reserved *Resources
// Links are used to 'link' this client to external
// systems. For example 'consul=foo.dc1' 'aws=i-83212'
// 'ami=ami-123'
Links map[string]string
// Meta is used to associate arbitrary metadata with this
// client. This is opaque to Nomad.
Meta map[string]string
// NodeClass is an opaque identifier used to group nodes
// together for the purpose of determining scheduling pressure.
NodeClass string
// ComputedClass is a unique id that identifies nodes with a common set of
// attributes and capabilities.
ComputedClass string
// COMPAT: Remove in Nomad 0.9
// Drain is controlled by the servers, and not the client.
// If true, no jobs will be scheduled to this node, and existing
// allocations will be drained. Superseded by DrainStrategy in Nomad
// 0.8 but kept for backward compat.
Drain bool
// DrainStrategy determines the node's draining behavior. Will be nil
// when Drain=false.
DrainStrategy *DrainStrategy
// SchedulingEligibility determines whether this node will receive new
// placements.
SchedulingEligibility string
// Status of this node
Status string
// StatusDescription is meant to provide more human useful information
StatusDescription string
// StatusUpdatedAt is the time stamp at which the state of the node was
// updated
StatusUpdatedAt int64
// Events is the most recent set of events generated for the node,
// retaining only MaxRetainedNodeEvents number at a time
Events []*NodeEvent
// Drivers is a map of driver names to current driver information
Drivers map[string]*DriverInfo
// CSIControllerPlugins is a map of plugin names to current CSI Plugin info
CSIControllerPlugins map[string]*CSIInfo
// CSINodePlugins is a map of plugin names to current CSI Plugin info
CSINodePlugins map[string]*CSIInfo
// HostVolumes is a map of host volume names to their configuration
HostVolumes map[string]*ClientHostVolumeConfig
// Raft Indexes
CreateIndex uint64
ModifyIndex uint64
}
// Ready returns true if the node is ready for running allocations
func (n *Node) Ready() bool {
// Drain is checked directly to support pre-0.8 Node data
return n.Status == NodeStatusReady && !n.Drain && n.SchedulingEligibility == NodeSchedulingEligible
}
func (n *Node) Canonicalize() {
if n == nil {
return
}
// COMPAT Remove in 0.10
// In v0.8.0 we introduced scheduling eligibility, so we need to set it for
// upgrading nodes
if n.SchedulingEligibility == "" {
if n.Drain {
n.SchedulingEligibility = NodeSchedulingIneligible
} else {
n.SchedulingEligibility = NodeSchedulingEligible
}
}
// COMPAT remove in 1.0
// In v0.12.0 we introduced a separate node specific network resource struct
// so we need to covert any pre 0.12 clients to the correct struct
if n.NodeResources != nil && n.NodeResources.NodeNetworks == nil {
if n.NodeResources.Networks != nil {
for _, nr := range n.NodeResources.Networks {
nnr := &NodeNetworkResource{
Mode: nr.Mode,
Speed: nr.MBits,
Device: nr.Device,
}
if nr.IP != "" {
nnr.Addresses = []NodeNetworkAddress{
{
Alias: "default",
Address: nr.IP,
},
}
}
n.NodeResources.NodeNetworks = append(n.NodeResources.NodeNetworks, nnr)
}
}
}
}
func (n *Node) Copy() *Node {
if n == nil {
return nil
}
nn := new(Node)
*nn = *n
nn.Attributes = helper.CopyMapStringString(nn.Attributes)
nn.Resources = nn.Resources.Copy()
nn.Reserved = nn.Reserved.Copy()
nn.NodeResources = nn.NodeResources.Copy()
nn.ReservedResources = nn.ReservedResources.Copy()
nn.Links = helper.CopyMapStringString(nn.Links)
nn.Meta = helper.CopyMapStringString(nn.Meta)
nn.Events = copyNodeEvents(n.Events)
nn.DrainStrategy = nn.DrainStrategy.Copy()
nn.CSIControllerPlugins = copyNodeCSI(nn.CSIControllerPlugins)
nn.CSINodePlugins = copyNodeCSI(nn.CSINodePlugins)
nn.Drivers = copyNodeDrivers(n.Drivers)
nn.HostVolumes = copyNodeHostVolumes(n.HostVolumes)
return nn
}
// copyNodeEvents is a helper to copy a list of NodeEvent's
func copyNodeEvents(events []*NodeEvent) []*NodeEvent {
l := len(events)
if l == 0 {
return nil
}
c := make([]*NodeEvent, l)
for i, event := range events {
c[i] = event.Copy()
}
return c
}
// copyNodeCSI is a helper to copy a map of CSIInfo
func copyNodeCSI(plugins map[string]*CSIInfo) map[string]*CSIInfo {
l := len(plugins)
if l == 0 {
return nil
}
c := make(map[string]*CSIInfo, l)
for plugin, info := range plugins {
c[plugin] = info.Copy()
}
return c
}
// copyNodeDrivers is a helper to copy a map of DriverInfo
func copyNodeDrivers(drivers map[string]*DriverInfo) map[string]*DriverInfo {
l := len(drivers)
if l == 0 {
return nil
}
c := make(map[string]*DriverInfo, l)
for driver, info := range drivers {
c[driver] = info.Copy()
}
return c
}
// copyNodeHostVolumes is a helper to copy a map of string to Volume
func copyNodeHostVolumes(volumes map[string]*ClientHostVolumeConfig) map[string]*ClientHostVolumeConfig {
l := len(volumes)
if l == 0 {
return nil
}
c := make(map[string]*ClientHostVolumeConfig, l)
for volume, v := range volumes {
c[volume] = v.Copy()
}
return c
}
// TerminalStatus returns if the current status is terminal and
// will no longer transition.
func (n *Node) TerminalStatus() bool {
switch n.Status {
case NodeStatusDown:
return true
default:
return false
}
}
// COMPAT(0.11): Remove in 0.11
// ComparableReservedResources returns the reserved resouces on the node
// handling upgrade paths. Reserved networks must be handled separately. After
// 0.11 calls to this should be replaced with:
// node.ReservedResources.Comparable()
func (n *Node) ComparableReservedResources() *ComparableResources {
// See if we can no-op
if n.Reserved == nil && n.ReservedResources == nil {
return nil
}
// Node already has 0.9+ behavior
if n.ReservedResources != nil {
return n.ReservedResources.Comparable()
}
// Upgrade path
return &ComparableResources{
Flattened: AllocatedTaskResources{
Cpu: AllocatedCpuResources{
CpuShares: int64(n.Reserved.CPU),
},
Memory: AllocatedMemoryResources{
MemoryMB: int64(n.Reserved.MemoryMB),
},
},
Shared: AllocatedSharedResources{
DiskMB: int64(n.Reserved.DiskMB),
},
}
}
// COMPAT(0.11): Remove in 0.11
// ComparableResources returns the resouces on the node
// handling upgrade paths. Networking must be handled separately. After 0.11
// calls to this should be replaced with: node.NodeResources.Comparable()
func (n *Node) ComparableResources() *ComparableResources {
// Node already has 0.9+ behavior
if n.NodeResources != nil {
return n.NodeResources.Comparable()
}
// Upgrade path
return &ComparableResources{
Flattened: AllocatedTaskResources{
Cpu: AllocatedCpuResources{
CpuShares: int64(n.Resources.CPU),
},
Memory: AllocatedMemoryResources{
MemoryMB: int64(n.Resources.MemoryMB),
},
},
Shared: AllocatedSharedResources{
DiskMB: int64(n.Resources.DiskMB),
},
}
}
// Stub returns a summarized version of the node
func (n *Node) Stub(fields *NodeStubFields) *NodeListStub {
addr, _, _ := net.SplitHostPort(n.HTTPAddr)
s := &NodeListStub{
Address: addr,
ID: n.ID,
Datacenter: n.Datacenter,
Name: n.Name,
NodeClass: n.NodeClass,
Version: n.Attributes["nomad.version"],
Drain: n.Drain,
SchedulingEligibility: n.SchedulingEligibility,
Status: n.Status,
StatusDescription: n.StatusDescription,
Drivers: n.Drivers,
HostVolumes: n.HostVolumes,
CreateIndex: n.CreateIndex,
ModifyIndex: n.ModifyIndex,
}
if fields != nil {
if fields.Resources {
s.NodeResources = n.NodeResources
s.ReservedResources = n.ReservedResources
}
}
return s
}
// NodeListStub is used to return a subset of job information
// for the job list
type NodeListStub struct {
Address string
ID string
Datacenter string
Name string
NodeClass string
Version string
Drain bool
SchedulingEligibility string
Status string
StatusDescription string
Drivers map[string]*DriverInfo
HostVolumes map[string]*ClientHostVolumeConfig
NodeResources *NodeResources `json:",omitempty"`
ReservedResources *NodeReservedResources `json:",omitempty"`
CreateIndex uint64
ModifyIndex uint64
}
// NodeStubFields defines which fields are included in the NodeListStub.
type NodeStubFields struct {
Resources bool
}
// Resources is used to define the resources available
// on a client
type Resources struct {
CPU int
MemoryMB int
DiskMB int
IOPS int // COMPAT(0.10): Only being used to issue warnings
Networks Networks
Devices ResourceDevices
}
const (
BytesInMegabyte = 1024 * 1024
)
// DefaultResources is a small resources object that contains the
// default resources requests that we will provide to an object.
// --- THIS FUNCTION IS REPLICATED IN api/resources.go and should
// be kept in sync.
func DefaultResources() *Resources {
return &Resources{
CPU: 100,
MemoryMB: 300,
}
}
// MinResources is a small resources object that contains the
// absolute minimum resources that we will provide to an object.
// This should not be confused with the defaults which are
// provided in Canonicalize() --- THIS FUNCTION IS REPLICATED IN
// api/resources.go and should be kept in sync.
func MinResources() *Resources {
return &Resources{
CPU: 1,
MemoryMB: 10,
}
}
// DiskInBytes returns the amount of disk resources in bytes.
func (r *Resources) DiskInBytes() int64 {
return int64(r.DiskMB * BytesInMegabyte)
}
func (r *Resources) Validate() error {
var mErr multierror.Error
if err := r.MeetsMinResources(); err != nil {
mErr.Errors = append(mErr.Errors, err)
}
// Ensure the task isn't asking for disk resources
if r.DiskMB > 0 {
mErr.Errors = append(mErr.Errors, errors.New("Task can't ask for disk resources, they have to be specified at the task group level."))
}
for i, d := range r.Devices {
if err := d.Validate(); err != nil {
mErr.Errors = append(mErr.Errors, fmt.Errorf("device %d failed validation: %v", i+1, err))
}
}
return mErr.ErrorOrNil()
}
// Merge merges this resource with another resource.
// COMPAT(0.10): Remove in 0.10
func (r *Resources) Merge(other *Resources) {
if other.CPU != 0 {
r.CPU = other.CPU
}
if other.MemoryMB != 0 {
r.MemoryMB = other.MemoryMB
}
if other.DiskMB != 0 {
r.DiskMB = other.DiskMB
}
if len(other.Networks) != 0 {
r.Networks = other.Networks
}
if len(other.Devices) != 0 {
r.Devices = other.Devices
}
}
// COMPAT(0.10): Remove in 0.10
func (r *Resources) Equals(o *Resources) bool {
if r == o {
return true
}
if r == nil || o == nil {
return false
}
return r.CPU == o.CPU &&
r.MemoryMB == o.MemoryMB &&
r.DiskMB == o.DiskMB &&
r.IOPS == o.IOPS &&
r.Networks.Equals(&o.Networks) &&
r.Devices.Equals(&o.Devices)
}
// COMPAT(0.10): Remove in 0.10
// ResourceDevices are part of Resources
type ResourceDevices []*RequestedDevice
// COMPAT(0.10): Remove in 0.10
// Equals ResourceDevices as set keyed by Name
func (d *ResourceDevices) Equals(o *ResourceDevices) bool {
if d == o {
return true
}
if d == nil || o == nil {
return false
}
if len(*d) != len(*o) {
return false
}
m := make(map[string]*RequestedDevice, len(*d))
for _, e := range *d {
m[e.Name] = e
}
for _, oe := range *o {
de, ok := m[oe.Name]
if !ok || !de.Equals(oe) {
return false
}
}
return true
}
// COMPAT(0.10): Remove in 0.10
func (r *Resources) Canonicalize() {
// Ensure that an empty and nil slices are treated the same to avoid scheduling
// problems since we use reflect DeepEquals.
if len(r.Networks) == 0 {
r.Networks = nil
}
if len(r.Devices) == 0 {
r.Devices = nil
}
for _, n := range r.Networks {
n.Canonicalize()
}
}
// MeetsMinResources returns an error if the resources specified are less than
// the minimum allowed.
// This is based on the minimums defined in the Resources type
// COMPAT(0.10): Remove in 0.10
func (r *Resources) MeetsMinResources() error {
var mErr multierror.Error
minResources := MinResources()
if r.CPU < minResources.CPU {
mErr.Errors = append(mErr.Errors, fmt.Errorf("minimum CPU value is %d; got %d", minResources.CPU, r.CPU))
}
if r.MemoryMB < minResources.MemoryMB {
mErr.Errors = append(mErr.Errors, fmt.Errorf("minimum MemoryMB value is %d; got %d", minResources.MemoryMB, r.MemoryMB))
}
return mErr.ErrorOrNil()
}
// Copy returns a deep copy of the resources
func (r *Resources) Copy() *Resources {
if r == nil {
return nil
}
newR := new(Resources)
*newR = *r
// Copy the network objects
newR.Networks = r.Networks.Copy()
// Copy the devices
if r.Devices != nil {
n := len(r.Devices)
newR.Devices = make([]*RequestedDevice, n)
for i := 0; i < n; i++ {
newR.Devices[i] = r.Devices[i].Copy()
}
}
return newR
}
// NetIndex finds the matching net index using device name
// COMPAT(0.10): Remove in 0.10
func (r *Resources) NetIndex(n *NetworkResource) int {
return r.Networks.NetIndex(n)
}
// Superset checks if one set of resources is a superset
// of another. This ignores network resources, and the NetworkIndex
// should be used for that.
// COMPAT(0.10): Remove in 0.10
func (r *Resources) Superset(other *Resources) (bool, string) {
if r.CPU < other.CPU {
return false, "cpu"
}
if r.MemoryMB < other.MemoryMB {
return false, "memory"
}
if r.DiskMB < other.DiskMB {
return false, "disk"
}
return true, ""
}
// Add adds the resources of the delta to this, potentially
// returning an error if not possible.
// COMPAT(0.10): Remove in 0.10
func (r *Resources) Add(delta *Resources) error {
if delta == nil {
return nil
}
r.CPU += delta.CPU
r.MemoryMB += delta.MemoryMB
r.DiskMB += delta.DiskMB
for _, n := range delta.Networks {
// Find the matching interface by IP or CIDR
idx := r.NetIndex(n)
if idx == -1 {
r.Networks = append(r.Networks, n.Copy())
} else {
r.Networks[idx].Add(n)
}
}
return nil
}
// COMPAT(0.10): Remove in 0.10
func (r *Resources) GoString() string {
return fmt.Sprintf("*%#v", *r)
}
// NodeNetworkResource is used to describe a fingerprinted network of a node
type NodeNetworkResource struct {
Mode string // host for physical networks, cni/<name> for cni networks
// The following apply only to host networks
Device string // interface name
MacAddress string
Speed int
Addresses []NodeNetworkAddress // not valid for cni, for bridge there will only be 1 ip
}
func (n *NodeNetworkResource) Equals(o *NodeNetworkResource) bool {
return reflect.DeepEqual(n, o)
}
func (n *NodeNetworkResource) HasAlias(alias string) bool {
for _, addr := range n.Addresses {
if addr.Alias == alias {
return true
}
}
return false
}
type NodeNetworkAF string
const (
NodeNetworkAF_IPv4 NodeNetworkAF = "ipv4"
NodeNetworkAF_IPv6 NodeNetworkAF = "ipv6"
)
type NodeNetworkAddress struct {
Family NodeNetworkAF
Alias string
Address string
ReservedPorts string
Gateway string // default route for this address
}
type AllocatedPortMapping struct {
Label string
Value int
To int
HostIP string
}
type AllocatedPorts []AllocatedPortMapping
func (p AllocatedPorts) Get(label string) (AllocatedPortMapping, bool) {
for _, port := range p {
if port.Label == label {
return port, true
}
}
return AllocatedPortMapping{}, false
}
type Port struct {
// Label is the key for HCL port stanzas: port "foo" {}
Label string
// Value is the static or dynamic port value. For dynamic ports this
// will be 0 in the jobspec and set by the scheduler.
Value int
// To is the port inside a network namespace where this port is
// forwarded. -1 is an internal sentinel value used by Consul Connect
// to mean "same as the host port."
To int
// HostNetwork is the name of the network this port should be assigned
// to. Jobs with a HostNetwork set can only be placed on nodes with
// that host network available.
HostNetwork string
}
type DNSConfig struct {
Servers []string
Searches []string
Options []string
}
func (d *DNSConfig) Copy() *DNSConfig {
if d == nil {
return nil
}
newD := new(DNSConfig)
newD.Servers = make([]string, len(d.Servers))
copy(newD.Servers, d.Servers)
newD.Searches = make([]string, len(d.Searches))
copy(newD.Searches, d.Searches)
newD.Options = make([]string, len(d.Options))
copy(newD.Options, d.Options)
return newD
}
// NetworkResource is used to represent available network
// resources
type NetworkResource struct {
Mode string // Mode of the network
Device string // Name of the device
CIDR string // CIDR block of addresses
IP string // Host IP address
MBits int // Throughput
DNS *DNSConfig // DNS Configuration
ReservedPorts []Port // Host Reserved ports
DynamicPorts []Port // Host Dynamically assigned ports
}
func (nr *NetworkResource) Hash() uint32 {
var data []byte
data = append(data, []byte(fmt.Sprintf("%s%s%s%s%d", nr.Mode, nr.Device, nr.CIDR, nr.IP, nr.MBits))...)
for i, port := range nr.ReservedPorts {
data = append(data, []byte(fmt.Sprintf("r%d%s%d%d", i, port.Label, port.Value, port.To))...)
}
for i, port := range nr.DynamicPorts {
data = append(data, []byte(fmt.Sprintf("d%d%s%d%d", i, port.Label, port.Value, port.To))...)
}
return crc32.ChecksumIEEE(data)
}
func (nr *NetworkResource) Equals(other *NetworkResource) bool {
return nr.Hash() == other.Hash()
}
func (n *NetworkResource) Canonicalize() {
// Ensure that an empty and nil slices are treated the same to avoid scheduling
// problems since we use reflect DeepEquals.
if len(n.ReservedPorts) == 0 {
n.ReservedPorts = nil
}
if len(n.DynamicPorts) == 0 {
n.DynamicPorts = nil
}
for i, p := range n.DynamicPorts {
if p.HostNetwork == "" {
n.DynamicPorts[i].HostNetwork = "default"
}
}
for i, p := range n.ReservedPorts {
if p.HostNetwork == "" {
n.ReservedPorts[i].HostNetwork = "default"
}
}
}
// Copy returns a deep copy of the network resource
func (n *NetworkResource) Copy() *NetworkResource {
if n == nil {
return nil
}
newR := new(NetworkResource)
*newR = *n
if n.ReservedPorts != nil {
newR.ReservedPorts = make([]Port, len(n.ReservedPorts))
copy(newR.ReservedPorts, n.ReservedPorts)
}
if n.DynamicPorts != nil {
newR.DynamicPorts = make([]Port, len(n.DynamicPorts))
copy(newR.DynamicPorts, n.DynamicPorts)
}
return newR
}
// Add adds the resources of the delta to this, potentially
// returning an error if not possible.
func (n *NetworkResource) Add(delta *NetworkResource) {
if len(delta.ReservedPorts) > 0 {
n.ReservedPorts = append(n.ReservedPorts, delta.ReservedPorts...)
}
n.MBits += delta.MBits
n.DynamicPorts = append(n.DynamicPorts, delta.DynamicPorts...)
}
func (n *NetworkResource) GoString() string {
return fmt.Sprintf("*%#v", *n)
}
// PortLabels returns a map of port labels to their assigned host ports.
func (n *NetworkResource) PortLabels() map[string]int {
num := len(n.ReservedPorts) + len(n.DynamicPorts)
labelValues := make(map[string]int, num)
for _, port := range n.ReservedPorts {
labelValues[port.Label] = port.Value
}
for _, port := range n.DynamicPorts {
labelValues[port.Label] = port.Value
}
return labelValues
}
// ConnectPort returns the Connect port for the given service. Returns false if
// no port was found for a service with that name.
func (n *NetworkResource) PortForService(serviceName string) (Port, bool) {
label := fmt.Sprintf("%s-%s", ConnectProxyPrefix, serviceName)
for _, port := range n.ReservedPorts {
if port.Label == label {
return port, true
}
}
for _, port := range n.DynamicPorts {
if port.Label == label {
return port, true
}
}
return Port{}, false
}
// Networks defined for a task on the Resources struct.
type Networks []*NetworkResource
func (ns Networks) Copy() Networks {
if len(ns) == 0 {
return nil
}
out := make([]*NetworkResource, len(ns))
for i := range ns {
out[i] = ns[i].Copy()
}
return out
}
// Port assignment and IP for the given label or empty values.
func (ns Networks) Port(label string) (string, int) {
for _, n := range ns {
for _, p := range n.ReservedPorts {
if p.Label == label {
return n.IP, p.Value
}
}
for _, p := range n.DynamicPorts {
if p.Label == label {
return n.IP, p.Value
}
}
}
return "", 0
}
func (ns Networks) NetIndex(n *NetworkResource) int {
for idx, net := range ns {
if net.Device == n.Device {
return idx
}
}
return -1
}
// RequestedDevice is used to request a device for a task.
type RequestedDevice struct {
// Name is the request name. The possible values are as follows:
// * <type>: A single value only specifies the type of request.
// * <vendor>/<type>: A single slash delimiter assumes the vendor and type of device is specified.
// * <vendor>/<type>/<name>: Two slash delimiters assume vendor, type and specific model are specified.
//
// Examples are as follows:
// * "gpu"
// * "nvidia/gpu"
// * "nvidia/gpu/GTX2080Ti"
Name string
// Count is the number of requested devices
Count uint64
// Constraints are a set of constraints to apply when selecting the device
// to use.
Constraints Constraints
// Affinities are a set of affinities to apply when selecting the device
// to use.
Affinities Affinities
}
func (r *RequestedDevice) Equals(o *RequestedDevice) bool {
if r == o {
return true
}
if r == nil || o == nil {
return false
}
return r.Name == o.Name &&
r.Count == o.Count &&
r.Constraints.Equals(&o.Constraints) &&
r.Affinities.Equals(&o.Affinities)
}
func (r *RequestedDevice) Copy() *RequestedDevice {
if r == nil {
return nil
}
nr := *r
nr.Constraints = CopySliceConstraints(nr.Constraints)
nr.Affinities = CopySliceAffinities(nr.Affinities)
return &nr
}
func (r *RequestedDevice) ID() *DeviceIdTuple {
if r == nil || r.Name == "" {
return nil
}
parts := strings.SplitN(r.Name, "/", 3)
switch len(parts) {
case 1:
return &DeviceIdTuple{
Type: parts[0],
}
case 2:
return &DeviceIdTuple{
Vendor: parts[0],
Type: parts[1],
}
default:
return &DeviceIdTuple{
Vendor: parts[0],
Type: parts[1],
Name: parts[2],
}
}
}
func (r *RequestedDevice) Validate() error {
if r == nil {
return nil
}
var mErr multierror.Error
if r.Name == "" {
multierror.Append(&mErr, errors.New("device name must be given as one of the following: type, vendor/type, or vendor/type/name"))
}
for idx, constr := range r.Constraints {
// Ensure that the constraint doesn't use an operand we do not allow
switch constr.Operand {
case ConstraintDistinctHosts, ConstraintDistinctProperty:
outer := fmt.Errorf("Constraint %d validation failed: using unsupported operand %q", idx+1, constr.Operand)
multierror.Append(&mErr, outer)
default:
if err := constr.Validate(); err != nil {
outer := fmt.Errorf("Constraint %d validation failed: %s", idx+1, err)
multierror.Append(&mErr, outer)
}
}
}
for idx, affinity := range r.Affinities {
if err := affinity.Validate(); err != nil {
outer := fmt.Errorf("Affinity %d validation failed: %s", idx+1, err)
multierror.Append(&mErr, outer)
}
}
return mErr.ErrorOrNil()
}
// NodeResources is used to define the resources available on a client node.
type NodeResources struct {
Cpu NodeCpuResources
Memory NodeMemoryResources
Disk NodeDiskResources
Networks Networks
NodeNetworks []*NodeNetworkResource
Devices []*NodeDeviceResource
}
func (n *NodeResources) Copy() *NodeResources {
if n == nil {
return nil
}
newN := new(NodeResources)
*newN = *n
// Copy the networks
newN.Networks = n.Networks.Copy()
// Copy the devices
if n.Devices != nil {
devices := len(n.Devices)
newN.Devices = make([]*NodeDeviceResource, devices)
for i := 0; i < devices; i++ {
newN.Devices[i] = n.Devices[i].Copy()
}
}
return newN
}
// Comparable returns a comparable version of the nodes resources. This
// conversion can be lossy so care must be taken when using it.
func (n *NodeResources) Comparable() *ComparableResources {
if n == nil {
return nil
}
c := &ComparableResources{
Flattened: AllocatedTaskResources{
Cpu: AllocatedCpuResources{
CpuShares: n.Cpu.CpuShares,
},
Memory: AllocatedMemoryResources{
MemoryMB: n.Memory.MemoryMB,
},
Networks: n.Networks,
},
Shared: AllocatedSharedResources{
DiskMB: n.Disk.DiskMB,
},
}
return c
}
func (n *NodeResources) Merge(o *NodeResources) {
if o == nil {
return
}
n.Cpu.Merge(&o.Cpu)
n.Memory.Merge(&o.Memory)
n.Disk.Merge(&o.Disk)
if len(o.Networks) != 0 {
n.Networks = append(n.Networks, o.Networks...)
}
if len(o.Devices) != 0 {
n.Devices = o.Devices
}
if len(o.NodeNetworks) != 0 {
lookupNetwork := func(nets []*NodeNetworkResource, name string) (int, *NodeNetworkResource) {
for i, nw := range nets {
if nw.Device == name {
return i, nw
}
}
return 0, nil
}
for _, nw := range o.NodeNetworks {
if i, nnw := lookupNetwork(n.NodeNetworks, nw.Device); nnw != nil {
n.NodeNetworks[i] = nw
} else {
n.NodeNetworks = append(n.NodeNetworks, nw)
}
}
}
}
func (n *NodeResources) Equals(o *NodeResources) bool {
if o == nil && n == nil {
return true
} else if o == nil {
return false
} else if n == nil {
return false
}
if !n.Cpu.Equals(&o.Cpu) {
return false
}
if !n.Memory.Equals(&o.Memory) {
return false
}
if !n.Disk.Equals(&o.Disk) {
return false
}
if !n.Networks.Equals(&o.Networks) {
return false
}
// Check the devices
if !DevicesEquals(n.Devices, o.Devices) {
return false
}
if !NodeNetworksEquals(n.NodeNetworks, o.NodeNetworks) {
return false
}
return true
}
// Equals equates Networks as a set
func (ns *Networks) Equals(o *Networks) bool {
if ns == o {
return true
}
if ns == nil || o == nil {
return false
}
if len(*ns) != len(*o) {
return false
}
SETEQUALS:
for _, ne := range *ns {
for _, oe := range *o {
if ne.Equals(oe) {
continue SETEQUALS
}
}
return false
}
return true
}
// DevicesEquals returns true if the two device arrays are set equal
func DevicesEquals(d1, d2 []*NodeDeviceResource) bool {
if len(d1) != len(d2) {
return false
}
idMap := make(map[DeviceIdTuple]*NodeDeviceResource, len(d1))
for _, d := range d1 {
idMap[*d.ID()] = d
}
for _, otherD := range d2 {
if d, ok := idMap[*otherD.ID()]; !ok || !d.Equals(otherD) {
return false
}
}
return true
}
func NodeNetworksEquals(n1, n2 []*NodeNetworkResource) bool {
if len(n1) != len(n2) {
return false
}
netMap := make(map[string]*NodeNetworkResource, len(n1))
for _, n := range n1 {
netMap[n.Device] = n
}
for _, otherN := range n2 {
if n, ok := netMap[otherN.Device]; !ok || !n.Equals(otherN) {
return false
}
}
return true
}
// NodeCpuResources captures the CPU resources of the node.
type NodeCpuResources struct {
// CpuShares is the CPU shares available. This is calculated by number of
// cores multiplied by the core frequency.
CpuShares int64
}
func (n *NodeCpuResources) Merge(o *NodeCpuResources) {
if o == nil {
return
}
if o.CpuShares != 0 {
n.CpuShares = o.CpuShares
}
}
func (n *NodeCpuResources) Equals(o *NodeCpuResources) bool {
if o == nil && n == nil {
return true
} else if o == nil {
return false
} else if n == nil {
return false
}
if n.CpuShares != o.CpuShares {
return false
}
return true
}
// NodeMemoryResources captures the memory resources of the node
type NodeMemoryResources struct {
// MemoryMB is the total available memory on the node
MemoryMB int64
}
func (n *NodeMemoryResources) Merge(o *NodeMemoryResources) {
if o == nil {
return
}
if o.MemoryMB != 0 {
n.MemoryMB = o.MemoryMB
}
}
func (n *NodeMemoryResources) Equals(o *NodeMemoryResources) bool {
if o == nil && n == nil {
return true
} else if o == nil {
return false
} else if n == nil {
return false
}
if n.MemoryMB != o.MemoryMB {
return false
}
return true
}
// NodeDiskResources captures the disk resources of the node
type NodeDiskResources struct {
// DiskMB is the total available disk space on the node
DiskMB int64
}
func (n *NodeDiskResources) Merge(o *NodeDiskResources) {
if o == nil {
return
}
if o.DiskMB != 0 {
n.DiskMB = o.DiskMB
}
}
func (n *NodeDiskResources) Equals(o *NodeDiskResources) bool {
if o == nil && n == nil {
return true
} else if o == nil {
return false
} else if n == nil {
return false
}
if n.DiskMB != o.DiskMB {
return false
}
return true
}
// DeviceIdTuple is the tuple that identifies a device
type DeviceIdTuple struct {
Vendor string
Type string
Name string
}
func (d *DeviceIdTuple) String() string {
if d == nil {
return ""
}
return fmt.Sprintf("%s/%s/%s", d.Vendor, d.Type, d.Name)
}
// Matches returns if this Device ID is a superset of the passed ID.
func (id *DeviceIdTuple) Matches(other *DeviceIdTuple) bool {
if other == nil {
return false
}
if other.Name != "" && other.Name != id.Name {
return false
}
if other.Vendor != "" && other.Vendor != id.Vendor {
return false
}
if other.Type != "" && other.Type != id.Type {
return false
}
return true
}
// Equals returns if this Device ID is the same as the passed ID.
func (id *DeviceIdTuple) Equals(o *DeviceIdTuple) bool {
if id == nil && o == nil {
return true
} else if id == nil || o == nil {
return false
}
return o.Vendor == id.Vendor && o.Type == id.Type && o.Name == id.Name
}
// NodeDeviceResource captures a set of devices sharing a common
// vendor/type/device_name tuple.
type NodeDeviceResource struct {
Vendor string
Type string
Name string
Instances []*NodeDevice
Attributes map[string]*psstructs.Attribute
}
func (n *NodeDeviceResource) ID() *DeviceIdTuple {
if n == nil {
return nil
}
return &DeviceIdTuple{
Vendor: n.Vendor,
Type: n.Type,
Name: n.Name,
}
}
func (n *NodeDeviceResource) Copy() *NodeDeviceResource {
if n == nil {
return nil
}
// Copy the primitives
nn := *n
// Copy the device instances
if l := len(nn.Instances); l != 0 {
nn.Instances = make([]*NodeDevice, 0, l)
for _, d := range n.Instances {
nn.Instances = append(nn.Instances, d.Copy())
}
}
// Copy the Attributes
nn.Attributes = psstructs.CopyMapStringAttribute(nn.Attributes)
return &nn
}
func (n *NodeDeviceResource) Equals(o *NodeDeviceResource) bool {
if o == nil && n == nil {
return true
} else if o == nil {
return false
} else if n == nil {
return false
}
if n.Vendor != o.Vendor {
return false
} else if n.Type != o.Type {
return false
} else if n.Name != o.Name {
return false
}
// Check the attributes
if len(n.Attributes) != len(o.Attributes) {
return false
}
for k, v := range n.Attributes {
if otherV, ok := o.Attributes[k]; !ok || v != otherV {
return false
}
}
// Check the instances
if len(n.Instances) != len(o.Instances) {
return false
}
idMap := make(map[string]*NodeDevice, len(n.Instances))
for _, d := range n.Instances {
idMap[d.ID] = d
}
for _, otherD := range o.Instances {
if d, ok := idMap[otherD.ID]; !ok || !d.Equals(otherD) {
return false
}
}
return true
}
// NodeDevice is an instance of a particular device.
type NodeDevice struct {
// ID is the ID of the device.
ID string
// Healthy captures whether the device is healthy.
Healthy bool
// HealthDescription is used to provide a human readable description of why
// the device may be unhealthy.
HealthDescription string
// Locality stores HW locality information for the node to optionally be
// used when making placement decisions.
Locality *NodeDeviceLocality
}
func (n *NodeDevice) Equals(o *NodeDevice) bool {
if o == nil && n == nil {
return true
} else if o == nil {
return false
} else if n == nil {
return false
}
if n.ID != o.ID {
return false
} else if n.Healthy != o.Healthy {
return false
} else if n.HealthDescription != o.HealthDescription {
return false
} else if !n.Locality.Equals(o.Locality) {
return false
}
return false
}
func (n *NodeDevice) Copy() *NodeDevice {
if n == nil {
return nil
}
// Copy the primitives
nn := *n
// Copy the locality
nn.Locality = nn.Locality.Copy()
return &nn
}
// NodeDeviceLocality stores information about the devices hardware locality on
// the node.
type NodeDeviceLocality struct {
// PciBusID is the PCI Bus ID for the device.
PciBusID string
}
func (n *NodeDeviceLocality) Equals(o *NodeDeviceLocality) bool {
if o == nil && n == nil {
return true
} else if o == nil {
return false
} else if n == nil {
return false
}
if n.PciBusID != o.PciBusID {
return false
}
return true
}
func (n *NodeDeviceLocality) Copy() *NodeDeviceLocality {
if n == nil {
return nil
}
// Copy the primitives
nn := *n
return &nn
}
// NodeReservedResources is used to capture the resources on a client node that
// should be reserved and not made available to jobs.
type NodeReservedResources struct {
Cpu NodeReservedCpuResources
Memory NodeReservedMemoryResources
Disk NodeReservedDiskResources
Networks NodeReservedNetworkResources
}
func (n *NodeReservedResources) Copy() *NodeReservedResources {
if n == nil {
return nil
}
newN := new(NodeReservedResources)
*newN = *n
return newN
}
// Comparable returns a comparable version of the node's reserved resources. The
// returned resources doesn't contain any network information. This conversion
// can be lossy so care must be taken when using it.
func (n *NodeReservedResources) Comparable() *ComparableResources {
if n == nil {
return nil
}
c := &ComparableResources{
Flattened: AllocatedTaskResources{
Cpu: AllocatedCpuResources{
CpuShares: n.Cpu.CpuShares,
},
Memory: AllocatedMemoryResources{
MemoryMB: n.Memory.MemoryMB,
},
},
Shared: AllocatedSharedResources{
DiskMB: n.Disk.DiskMB,
},
}
return c
}
// NodeReservedCpuResources captures the reserved CPU resources of the node.
type NodeReservedCpuResources struct {
CpuShares int64
}
// NodeReservedMemoryResources captures the reserved memory resources of the node.
type NodeReservedMemoryResources struct {
MemoryMB int64
}
// NodeReservedDiskResources captures the reserved disk resources of the node.
type NodeReservedDiskResources struct {
DiskMB int64
}
// NodeReservedNetworkResources captures the reserved network resources of the node.
type NodeReservedNetworkResources struct {
// ReservedHostPorts is the set of ports reserved on all host network
// interfaces. Its format is a comma separate list of integers or integer
// ranges. (80,443,1000-2000,2005)
ReservedHostPorts string
}
// ParsePortHostPorts returns the reserved host ports.
func (n *NodeReservedNetworkResources) ParseReservedHostPorts() ([]uint64, error) {
return ParsePortRanges(n.ReservedHostPorts)
}
// AllocatedResources is the set of resources to be used by an allocation.
type AllocatedResources struct {
// Tasks is a mapping of task name to the resources for the task.
Tasks map[string]*AllocatedTaskResources
TaskLifecycles map[string]*TaskLifecycleConfig
// Shared is the set of resource that are shared by all tasks in the group.
Shared AllocatedSharedResources
}
func (a *AllocatedResources) Copy() *AllocatedResources {
if a == nil {
return nil
}
out := AllocatedResources{
Shared: a.Shared.Copy(),
}
if a.Tasks != nil {
out.Tasks = make(map[string]*AllocatedTaskResources, len(out.Tasks))
for task, resource := range a.Tasks {
out.Tasks[task] = resource.Copy()
}
}
if a.TaskLifecycles != nil {
out.TaskLifecycles = make(map[string]*TaskLifecycleConfig, len(out.TaskLifecycles))
for task, lifecycle := range a.TaskLifecycles {
out.TaskLifecycles[task] = lifecycle.Copy()
}
}
return &out
}
// Comparable returns a comparable version of the allocations allocated
// resources. This conversion can be lossy so care must be taken when using it.
func (a *AllocatedResources) Comparable() *ComparableResources {
if a == nil {
return nil
}
c := &ComparableResources{
Shared: a.Shared,
}
prestartSidecarTasks := &AllocatedTaskResources{}
prestartEphemeralTasks := &AllocatedTaskResources{}
main := &AllocatedTaskResources{}
for taskName, r := range a.Tasks {
lc := a.TaskLifecycles[taskName]
if lc == nil {
main.Add(r)
} else if lc.Hook == TaskLifecycleHookPrestart {
if lc.Sidecar {
prestartSidecarTasks.Add(r)
} else {
prestartEphemeralTasks.Add(r)
}
}
}
// update this loop to account for lifecycle hook
prestartEphemeralTasks.Max(main)
prestartSidecarTasks.Add(prestartEphemeralTasks)
c.Flattened.Add(prestartSidecarTasks)
// Add network resources that are at the task group level
for _, network := range a.Shared.Networks {
c.Flattened.Add(&AllocatedTaskResources{
Networks: []*NetworkResource{network},
})
}
return c
}
// OldTaskResources returns the pre-0.9.0 map of task resources
func (a *AllocatedResources) OldTaskResources() map[string]*Resources {
m := make(map[string]*Resources, len(a.Tasks))
for name, res := range a.Tasks {
m[name] = &Resources{
CPU: int(res.Cpu.CpuShares),
MemoryMB: int(res.Memory.MemoryMB),
Networks: res.Networks,
}
}
return m
}
// AllocatedTaskResources are the set of resources allocated to a task.
type AllocatedTaskResources struct {
Cpu AllocatedCpuResources
Memory AllocatedMemoryResources
Networks Networks
Devices []*AllocatedDeviceResource
}
func (a *AllocatedTaskResources) Copy() *AllocatedTaskResources {
if a == nil {
return nil
}
newA := new(AllocatedTaskResources)
*newA = *a
// Copy the networks
newA.Networks = a.Networks.Copy()
// Copy the devices
if newA.Devices != nil {
n := len(a.Devices)
newA.Devices = make([]*AllocatedDeviceResource, n)
for i := 0; i < n; i++ {
newA.Devices[i] = a.Devices[i].Copy()
}
}
return newA
}
// NetIndex finds the matching net index using device name
func (a *AllocatedTaskResources) NetIndex(n *NetworkResource) int {
return a.Networks.NetIndex(n)
}
func (a *AllocatedTaskResources) Add(delta *AllocatedTaskResources) {
if delta == nil {
return
}
a.Cpu.Add(&delta.Cpu)
a.Memory.Add(&delta.Memory)
for _, n := range delta.Networks {
// Find the matching interface by IP or CIDR
idx := a.NetIndex(n)
if idx == -1 {
a.Networks = append(a.Networks, n.Copy())
} else {
a.Networks[idx].Add(n)
}
}
for _, d := range delta.Devices {
// Find the matching device
idx := AllocatedDevices(a.Devices).Index(d)
if idx == -1 {
a.Devices = append(a.Devices, d.Copy())
} else {
a.Devices[idx].Add(d)
}
}
}
func (a *AllocatedTaskResources) Max(other *AllocatedTaskResources) {
if other == nil {
return
}
a.Cpu.Max(&other.Cpu)
a.Memory.Max(&other.Memory)
for _, n := range other.Networks {
// Find the matching interface by IP or CIDR
idx := a.NetIndex(n)
if idx == -1 {
a.Networks = append(a.Networks, n.Copy())
} else {
a.Networks[idx].Add(n)
}
}
for _, d := range other.Devices {
// Find the matching device
idx := AllocatedDevices(a.Devices).Index(d)
if idx == -1 {
a.Devices = append(a.Devices, d.Copy())
} else {
a.Devices[idx].Add(d)
}
}
}
// Comparable turns AllocatedTaskResources into ComparableResources
// as a helper step in preemption
func (a *AllocatedTaskResources) Comparable() *ComparableResources {
ret := &ComparableResources{
Flattened: AllocatedTaskResources{
Cpu: AllocatedCpuResources{
CpuShares: a.Cpu.CpuShares,
},
Memory: AllocatedMemoryResources{
MemoryMB: a.Memory.MemoryMB,
},
},
}
if len(a.Networks) > 0 {
for _, net := range a.Networks {
ret.Flattened.Networks = append(ret.Flattened.Networks, net)
}
}
return ret
}
// Subtract only subtracts CPU and Memory resources. Network utilization
// is managed separately in NetworkIndex
func (a *AllocatedTaskResources) Subtract(delta *AllocatedTaskResources) {
if delta == nil {
return
}
a.Cpu.Subtract(&delta.Cpu)
a.Memory.Subtract(&delta.Memory)
}
// AllocatedSharedResources are the set of resources allocated to a task group.
type AllocatedSharedResources struct {
Networks Networks
DiskMB int64
Ports AllocatedPorts
}
func (a AllocatedSharedResources) Copy() AllocatedSharedResources {
return AllocatedSharedResources{
Networks: a.Networks.Copy(),
DiskMB: a.DiskMB,
Ports: a.Ports,
}
}
func (a *AllocatedSharedResources) Add(delta *AllocatedSharedResources) {
if delta == nil {
return
}
a.Networks = append(a.Networks, delta.Networks...)
a.DiskMB += delta.DiskMB
}
func (a *AllocatedSharedResources) Subtract(delta *AllocatedSharedResources) {
if delta == nil {
return
}
diff := map[*NetworkResource]bool{}
for _, n := range delta.Networks {
diff[n] = true
}
var nets Networks
for _, n := range a.Networks {
if _, ok := diff[n]; !ok {
nets = append(nets, n)
}
}
a.Networks = nets
a.DiskMB -= delta.DiskMB
}
func (a *AllocatedSharedResources) Canonicalize() {
if len(a.Networks) > 0 {
if len(a.Networks[0].DynamicPorts)+len(a.Networks[0].ReservedPorts) > 0 && len(a.Ports) == 0 {
for _, ports := range [][]Port{a.Networks[0].DynamicPorts, a.Networks[0].ReservedPorts} {
for _, p := range ports {
a.Ports = append(a.Ports, AllocatedPortMapping{
Label: p.Label,
Value: p.Value,
To: p.To,
HostIP: a.Networks[0].IP,
})
}
}
}
}
}
// AllocatedCpuResources captures the allocated CPU resources.
type AllocatedCpuResources struct {
CpuShares int64
}
func (a *AllocatedCpuResources) Add(delta *AllocatedCpuResources) {
if delta == nil {
return
}
a.CpuShares += delta.CpuShares
}
func (a *AllocatedCpuResources) Subtract(delta *AllocatedCpuResources) {
if delta == nil {
return
}
a.CpuShares -= delta.CpuShares
}
func (a *AllocatedCpuResources) Max(other *AllocatedCpuResources) {
if other == nil {
return
}
if other.CpuShares > a.CpuShares {
a.CpuShares = other.CpuShares
}
}
// AllocatedMemoryResources captures the allocated memory resources.
type AllocatedMemoryResources struct {
MemoryMB int64
}
func (a *AllocatedMemoryResources) Add(delta *AllocatedMemoryResources) {
if delta == nil {
return
}
a.MemoryMB += delta.MemoryMB
}
func (a *AllocatedMemoryResources) Subtract(delta *AllocatedMemoryResources) {
if delta == nil {
return
}
a.MemoryMB -= delta.MemoryMB
}
func (a *AllocatedMemoryResources) Max(other *AllocatedMemoryResources) {
if other == nil {
return
}
if other.MemoryMB > a.MemoryMB {
a.MemoryMB = other.MemoryMB
}
}
type AllocatedDevices []*AllocatedDeviceResource
// Index finds the matching index using the passed device. If not found, -1 is
// returned.
func (a AllocatedDevices) Index(d *AllocatedDeviceResource) int {
if d == nil {
return -1
}
for i, o := range a {
if o.ID().Equals(d.ID()) {
return i
}
}
return -1
}
// AllocatedDeviceResource captures a set of allocated devices.
type AllocatedDeviceResource struct {
// Vendor, Type, and Name are used to select the plugin to request the
// device IDs from.
Vendor string
Type string
Name string
// DeviceIDs is the set of allocated devices
DeviceIDs []string
}
func (a *AllocatedDeviceResource) ID() *DeviceIdTuple {
if a == nil {
return nil
}
return &DeviceIdTuple{
Vendor: a.Vendor,
Type: a.Type,
Name: a.Name,
}
}
func (a *AllocatedDeviceResource) Add(delta *AllocatedDeviceResource) {
if delta == nil {
return
}
a.DeviceIDs = append(a.DeviceIDs, delta.DeviceIDs...)
}
func (a *AllocatedDeviceResource) Copy() *AllocatedDeviceResource {
if a == nil {
return a
}
na := *a
// Copy the devices
na.DeviceIDs = make([]string, len(a.DeviceIDs))
for i, id := range a.DeviceIDs {
na.DeviceIDs[i] = id
}
return &na
}
// ComparableResources is the set of resources allocated to a task group but
// not keyed by Task, making it easier to compare.
type ComparableResources struct {
Flattened AllocatedTaskResources
Shared AllocatedSharedResources
}
func (c *ComparableResources) Add(delta *ComparableResources) {
if delta == nil {
return
}
c.Flattened.Add(&delta.Flattened)
c.Shared.Add(&delta.Shared)
}
func (c *ComparableResources) Subtract(delta *ComparableResources) {
if delta == nil {
return
}
c.Flattened.Subtract(&delta.Flattened)
c.Shared.Subtract(&delta.Shared)
}
func (c *ComparableResources) Copy() *ComparableResources {
if c == nil {
return nil
}
newR := new(ComparableResources)
*newR = *c
return newR
}
// Superset checks if one set of resources is a superset of another. This
// ignores network resources, and the NetworkIndex should be used for that.
func (c *ComparableResources) Superset(other *ComparableResources) (bool, string) {
if c.Flattened.Cpu.CpuShares < other.Flattened.Cpu.CpuShares {
return false, "cpu"
}
if c.Flattened.Memory.MemoryMB < other.Flattened.Memory.MemoryMB {
return false, "memory"
}
if c.Shared.DiskMB < other.Shared.DiskMB {
return false, "disk"
}
return true, ""
}
// allocated finds the matching net index using device name
func (c *ComparableResources) NetIndex(n *NetworkResource) int {
return c.Flattened.Networks.NetIndex(n)
}
const (
// JobTypeNomad is reserved for internal system tasks and is
// always handled by the CoreScheduler.
JobTypeCore = "_core"
JobTypeService = "service"
JobTypeBatch = "batch"
JobTypeSystem = "system"
)
const (
JobStatusPending = "pending" // Pending means the job is waiting on scheduling
JobStatusRunning = "running" // Running means the job has non-terminal allocations
JobStatusDead = "dead" // Dead means all evaluation's and allocations are terminal
)
const (
// JobMinPriority is the minimum allowed priority
JobMinPriority = 1
// JobDefaultPriority is the default priority if not
// not specified.
JobDefaultPriority = 50
// JobMaxPriority is the maximum allowed priority
JobMaxPriority = 100
// Ensure CoreJobPriority is higher than any user
// specified job so that it gets priority. This is important
// for the system to remain healthy.
CoreJobPriority = JobMaxPriority * 2
// JobTrackedVersions is the number of historic job versions that are
// kept.
JobTrackedVersions = 6
// JobTrackedScalingEvents is the number of scaling events that are
// kept for a single task group.
JobTrackedScalingEvents = 20
)
// Job is the scope of a scheduling request to Nomad. It is the largest
// scoped object, and is a named collection of task groups. Each task group
// is further composed of tasks. A task group (TG) is the unit of scheduling
// however.
type Job struct {
// Stop marks whether the user has stopped the job. A stopped job will
// have all created allocations stopped and acts as a way to stop a job
// without purging it from the system. This allows existing allocs to be
// queried and the job to be inspected as it is being killed.
Stop bool
// Region is the Nomad region that handles scheduling this job
Region string
// Namespace is the namespace the job is submitted into.
Namespace string
// ID is a unique identifier for the job per region. It can be
// specified hierarchically like LineOfBiz/OrgName/Team/Project
ID string
// ParentID is the unique identifier of the job that spawned this job.
ParentID string
// Name is the logical name of the job used to refer to it. This is unique
// per region, but not unique globally.
Name string
// Type is used to control various behaviors about the job. Most jobs
// are service jobs, meaning they are expected to be long lived.
// Some jobs are batch oriented meaning they run and then terminate.
// This can be extended in the future to support custom schedulers.
Type string
// Priority is used to control scheduling importance and if this job
// can preempt other jobs.
Priority int
// AllAtOnce is used to control if incremental scheduling of task groups
// is allowed or if we must do a gang scheduling of the entire job. This
// can slow down larger jobs if resources are not available.
AllAtOnce bool
// Datacenters contains all the datacenters this job is allowed to span
Datacenters []string
// Constraints can be specified at a job level and apply to
// all the task groups and tasks.
Constraints []*Constraint
// Affinities can be specified at the job level to express
// scheduling preferences that apply to all groups and tasks
Affinities []*Affinity
// Spread can be specified at the job level to express spreading
// allocations across a desired attribute, such as datacenter
Spreads []*Spread
// TaskGroups are the collections of task groups that this job needs
// to run. Each task group is an atomic unit of scheduling and placement.
TaskGroups []*TaskGroup
// See agent.ApiJobToStructJob
// Update provides defaults for the TaskGroup Update stanzas
Update UpdateStrategy
Multiregion *Multiregion
// Periodic is used to define the interval the job is run at.
Periodic *PeriodicConfig
// ParameterizedJob is used to specify the job as a parameterized job
// for dispatching.
ParameterizedJob *ParameterizedJobConfig
// Dispatched is used to identify if the Job has been dispatched from a
// parameterized job.
Dispatched bool
// Payload is the payload supplied when the job was dispatched.
Payload []byte
// Meta is used to associate arbitrary metadata with this
// job. This is opaque to Nomad.
Meta map[string]string
// ConsulToken is the Consul token that proves the submitter of the job has
// access to the Service Identity policies associated with the job's
// Consul Connect enabled services. This field is only used to transfer the
// token and is not stored after Job submission.
ConsulToken string
// VaultToken is the Vault token that proves the submitter of the job has
// access to the specified Vault policies. This field is only used to
// transfer the token and is not stored after Job submission.
VaultToken string
// VaultNamespace is the Vault namepace
VaultNamespace string
// NomadTokenID is the Accessor ID of the ACL token (if any)
// used to register this version of the job. Used by deploymentwatcher.
NomadTokenID string
// Job status
Status string
// StatusDescription is meant to provide more human useful information
StatusDescription string
// Stable marks a job as stable. Stability is only defined on "service" and
// "system" jobs. The stability of a job will be set automatically as part
// of a deployment and can be manually set via APIs. This field is updated
// when the status of a corresponding deployment transitions to Failed
// or Successful. This field is not meaningful for jobs that don't have an
// update stanza.
Stable bool
// Version is a monotonically increasing version number that is incremented
// on each job register.
Version uint64
// SubmitTime is the time at which the job was submitted as a UnixNano in
// UTC
SubmitTime int64
// Raft Indexes
CreateIndex uint64
ModifyIndex uint64
JobModifyIndex uint64
}
// NamespacedID returns the namespaced id useful for logging
func (j *Job) NamespacedID() *NamespacedID {
return &NamespacedID{
ID: j.ID,
Namespace: j.Namespace,
}
}
// Canonicalize is used to canonicalize fields in the Job. This should be called
// when registering a Job. A set of warnings are returned if the job was changed
// in anyway that the user should be made aware of.
func (j *Job) Canonicalize() (warnings error) {
if j == nil {
return nil
}
var mErr multierror.Error
// Ensure that an empty and nil map are treated the same to avoid scheduling
// problems since we use reflect DeepEquals.
if len(j.Meta) == 0 {
j.Meta = nil
}
// Ensure the job is in a namespace.
if j.Namespace == "" {
j.Namespace = DefaultNamespace
}
for _, tg := range j.TaskGroups {
tg.Canonicalize(j)
}
if j.ParameterizedJob != nil {
j.ParameterizedJob.Canonicalize()
}
if j.Multiregion != nil {
j.Multiregion.Canonicalize()
}
if j.Periodic != nil {
j.Periodic.Canonicalize()
}
return mErr.ErrorOrNil()
}
// Copy returns a deep copy of the Job. It is expected that callers use recover.
// This job can panic if the deep copy failed as it uses reflection.
func (j *Job) Copy() *Job {
if j == nil {
return nil
}
nj := new(Job)
*nj = *j
nj.Datacenters = helper.CopySliceString(nj.Datacenters)
nj.Constraints = CopySliceConstraints(nj.Constraints)
nj.Affinities = CopySliceAffinities(nj.Affinities)
nj.Multiregion = nj.Multiregion.Copy()
if j.TaskGroups != nil {
tgs := make([]*TaskGroup, len(nj.TaskGroups))
for i, tg := range nj.TaskGroups {
tgs[i] = tg.Copy()
}
nj.TaskGroups = tgs
}
nj.Periodic = nj.Periodic.Copy()
nj.Meta = helper.CopyMapStringString(nj.Meta)
nj.ParameterizedJob = nj.ParameterizedJob.Copy()
return nj
}
// Validate is used to sanity check a job input
func (j *Job) Validate() error {
var mErr multierror.Error
if j.Region == "" && j.Multiregion == nil {
mErr.Errors = append(mErr.Errors, errors.New("Missing job region"))
}
if j.ID == "" {
mErr.Errors = append(mErr.Errors, errors.New("Missing job ID"))
} else if strings.Contains(j.ID, " ") {
mErr.Errors = append(mErr.Errors, errors.New("Job ID contains a space"))
} else if strings.Contains(j.ID, "\000") {
mErr.Errors = append(mErr.Errors, errors.New("Job ID contains a null chararacter"))
}
if j.Name == "" {
mErr.Errors = append(mErr.Errors, errors.New("Missing job name"))
} else if strings.Contains(j.Name, "\000") {
mErr.Errors = append(mErr.Errors, errors.New("Job Name contains a null chararacter"))
}
if j.Namespace == "" {
mErr.Errors = append(mErr.Errors, errors.New("Job must be in a namespace"))
}
switch j.Type {
case JobTypeCore, JobTypeService, JobTypeBatch, JobTypeSystem:
case "":
mErr.Errors = append(mErr.Errors, errors.New("Missing job type"))
default:
mErr.Errors = append(mErr.Errors, fmt.Errorf("Invalid job type: %q", j.Type))
}
if j.Priority < JobMinPriority || j.Priority > JobMaxPriority {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Job priority must be between [%d, %d]", JobMinPriority, JobMaxPriority))
}
if len(j.Datacenters) == 0 && !j.IsMultiregion() {
mErr.Errors = append(mErr.Errors, errors.New("Missing job datacenters"))
} else {
for _, v := range j.Datacenters {
if v == "" {
mErr.Errors = append(mErr.Errors, errors.New("Job datacenter must be non-empty string"))
}
}
}
if len(j.TaskGroups) == 0 {
mErr.Errors = append(mErr.Errors, errors.New("Missing job task groups"))
}
for idx, constr := range j.Constraints {
if err := constr.Validate(); err != nil {
outer := fmt.Errorf("Constraint %d validation failed: %s", idx+1, err)
mErr.Errors = append(mErr.Errors, outer)
}
}
if j.Type == JobTypeSystem {
if j.Affinities != nil {
mErr.Errors = append(mErr.Errors, fmt.Errorf("System jobs may not have an affinity stanza"))
}
} else {
for idx, affinity := range j.Affinities {
if err := affinity.Validate(); err != nil {
outer := fmt.Errorf("Affinity %d validation failed: %s", idx+1, err)
mErr.Errors = append(mErr.Errors, outer)
}
}
}
if j.Type == JobTypeSystem {
if j.Spreads != nil {
mErr.Errors = append(mErr.Errors, fmt.Errorf("System jobs may not have a spread stanza"))
}
} else {
for idx, spread := range j.Spreads {
if err := spread.Validate(); err != nil {
outer := fmt.Errorf("Spread %d validation failed: %s", idx+1, err)
mErr.Errors = append(mErr.Errors, outer)
}
}
}
// Check for duplicate task groups
taskGroups := make(map[string]int)
for idx, tg := range j.TaskGroups {
if tg.Name == "" {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Job task group %d missing name", idx+1))
} else if existing, ok := taskGroups[tg.Name]; ok {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Job task group %d redefines '%s' from group %d", idx+1, tg.Name, existing+1))
} else {
taskGroups[tg.Name] = idx
}
if tg.ShutdownDelay != nil && *tg.ShutdownDelay < 0 {
mErr.Errors = append(mErr.Errors, errors.New("ShutdownDelay must be a positive value"))
}
if tg.StopAfterClientDisconnect != nil && *tg.StopAfterClientDisconnect != 0 {
if *tg.StopAfterClientDisconnect > 0 &&
!(j.Type == JobTypeBatch || j.Type == JobTypeService) {
mErr.Errors = append(mErr.Errors, errors.New("stop_after_client_disconnect can only be set in batch and service jobs"))
} else if *tg.StopAfterClientDisconnect < 0 {
mErr.Errors = append(mErr.Errors, errors.New("stop_after_client_disconnect must be a positive value"))
}
}
if j.Type == "system" && tg.Count > 1 {
mErr.Errors = append(mErr.Errors,
fmt.Errorf("Job task group %s has count %d. Count cannot exceed 1 with system scheduler",
tg.Name, tg.Count))
}
}
// Validate the task group
for _, tg := range j.TaskGroups {
if err := tg.Validate(j); err != nil {
outer := fmt.Errorf("Task group %s validation failed: %v", tg.Name, err)
mErr.Errors = append(mErr.Errors, outer)
}
}
// Validate periodic is only used with batch jobs.
if j.IsPeriodic() && j.Periodic.Enabled {
if j.Type != JobTypeBatch {
mErr.Errors = append(mErr.Errors,
fmt.Errorf("Periodic can only be used with %q scheduler", JobTypeBatch))
}
if err := j.Periodic.Validate(); err != nil {
mErr.Errors = append(mErr.Errors, err)
}
}
if j.IsParameterized() {
if j.Type != JobTypeBatch {
mErr.Errors = append(mErr.Errors,
fmt.Errorf("Parameterized job can only be used with %q scheduler", JobTypeBatch))
}
if err := j.ParameterizedJob.Validate(); err != nil {
mErr.Errors = append(mErr.Errors, err)
}
}
if j.IsMultiregion() {
if err := j.Multiregion.Validate(j.Type, j.Datacenters); err != nil {
mErr.Errors = append(mErr.Errors, err)
}
}
return mErr.ErrorOrNil()
}
// Warnings returns a list of warnings that may be from dubious settings or
// deprecation warnings.
func (j *Job) Warnings() error {
var mErr multierror.Error
// Check the groups
ap := 0
for _, tg := range j.TaskGroups {
if err := tg.Warnings(j); err != nil {
outer := fmt.Errorf("Group %q has warnings: %v", tg.Name, err)
mErr.Errors = append(mErr.Errors, outer)
}
if tg.Update != nil && tg.Update.AutoPromote {
ap += 1
}
}
// Check AutoPromote, should be all or none
if ap > 0 && ap < len(j.TaskGroups) {
err := fmt.Errorf("auto_promote must be true for all groups to enable automatic promotion")
mErr.Errors = append(mErr.Errors, err)
}
return mErr.ErrorOrNil()
}
// LookupTaskGroup finds a task group by name
func (j *Job) LookupTaskGroup(name string) *TaskGroup {
for _, tg := range j.TaskGroups {
if tg.Name == name {
return tg
}
}
return nil
}
// CombinedTaskMeta takes a TaskGroup and Task name and returns the combined
// meta data for the task. When joining Job, Group and Task Meta, the precedence
// is by deepest scope (Task > Group > Job).
func (j *Job) CombinedTaskMeta(groupName, taskName string) map[string]string {
group := j.LookupTaskGroup(groupName)
if group == nil {
return j.Meta
}
var meta map[string]string
task := group.LookupTask(taskName)
if task != nil {
meta = helper.CopyMapStringString(task.Meta)
}
if meta == nil {
meta = make(map[string]string, len(group.Meta)+len(j.Meta))
}
// Add the group specific meta
for k, v := range group.Meta {
if _, ok := meta[k]; !ok {
meta[k] = v
}
}
// Add the job specific meta
for k, v := range j.Meta {
if _, ok := meta[k]; !ok {
meta[k] = v
}
}
return meta
}
// Stopped returns if a job is stopped.
func (j *Job) Stopped() bool {
return j == nil || j.Stop
}
// HasUpdateStrategy returns if any task group in the job has an update strategy
func (j *Job) HasUpdateStrategy() bool {
for _, tg := range j.TaskGroups {
if !tg.Update.IsEmpty() {
return true
}
}
return false
}
// Stub is used to return a summary of the job
func (j *Job) Stub(summary *JobSummary) *JobListStub {
return &JobListStub{
ID: j.ID,
ParentID: j.ParentID,
Name: j.Name,
Datacenters: j.Datacenters,
Multiregion: j.Multiregion,
Type: j.Type,
Priority: j.Priority,
Periodic: j.IsPeriodic(),
ParameterizedJob: j.IsParameterized(),
Stop: j.Stop,
Status: j.Status,
StatusDescription: j.StatusDescription,
CreateIndex: j.CreateIndex,
ModifyIndex: j.ModifyIndex,
JobModifyIndex: j.JobModifyIndex,
SubmitTime: j.SubmitTime,
JobSummary: summary,
}
}
// IsPeriodic returns whether a job is periodic.
func (j *Job) IsPeriodic() bool {
return j.Periodic != nil
}
// IsPeriodicActive returns whether the job is an active periodic job that will
// create child jobs
func (j *Job) IsPeriodicActive() bool {
return j.IsPeriodic() && j.Periodic.Enabled && !j.Stopped() && !j.IsParameterized()
}
// IsParameterized returns whether a job is parameterized job.
func (j *Job) IsParameterized() bool {
return j.ParameterizedJob != nil && !j.Dispatched
}
// IsMultiregion returns whether a job is multiregion
func (j *Job) IsMultiregion() bool {
return j.Multiregion != nil && j.Multiregion.Regions != nil && len(j.Multiregion.Regions) > 0
}
// VaultPolicies returns the set of Vault policies per task group, per task
func (j *Job) VaultPolicies() map[string]map[string]*Vault {
policies := make(map[string]map[string]*Vault, len(j.TaskGroups))
for _, tg := range j.TaskGroups {
tgPolicies := make(map[string]*Vault, len(tg.Tasks))
for _, task := range tg.Tasks {
if task.Vault == nil {
continue
}
tgPolicies[task.Name] = task.Vault
}
if len(tgPolicies) != 0 {
policies[tg.Name] = tgPolicies
}
}
return policies
}
// ConnectTasks returns the set of Consul Connect enabled tasks defined on the
// job that will require a Service Identity token in the case that Consul ACLs
// are enabled. The TaskKind.Value is the name of the Consul service.
//
// This method is meaningful only after the Job has passed through the job
// submission Mutator functions.
func (j *Job) ConnectTasks() []TaskKind {
var kinds []TaskKind
for _, tg := range j.TaskGroups {
for _, task := range tg.Tasks {
if task.Kind.IsConnectProxy() ||
task.Kind.IsConnectNative() ||
task.Kind.IsAnyConnectGateway() {
kinds = append(kinds, task.Kind)
}
}
}
return kinds
}
// ConfigEntries accumulates the Consul Configuration Entries defined in task groups
// of j.
//
// Currently Nomad only supports entries for connect ingress gateways.
func (j *Job) ConfigEntries() map[string]*ConsulIngressConfigEntry {
igEntries := make(map[string]*ConsulIngressConfigEntry)
for _, tg := range j.TaskGroups {
for _, service := range tg.Services {
if service.Connect.IsGateway() {
if ig := service.Connect.Gateway.Ingress; ig != nil {
igEntries[service.Name] = ig
}
// imagine also accumulating other entry types in the future
}
}
}
return igEntries
}
// RequiredSignals returns a mapping of task groups to tasks to their required
// set of signals
func (j *Job) RequiredSignals() map[string]map[string][]string {
signals := make(map[string]map[string][]string)
for _, tg := range j.TaskGroups {
for _, task := range tg.Tasks {
// Use this local one as a set
taskSignals := make(map[string]struct{})
// Check if the Vault change mode uses signals
if task.Vault != nil && task.Vault.ChangeMode == VaultChangeModeSignal {
taskSignals[task.Vault.ChangeSignal] = struct{}{}
}
// If a user has specified a KillSignal, add it to required signals
if task.KillSignal != "" {
taskSignals[task.KillSignal] = struct{}{}
}
// Check if any template change mode uses signals
for _, t := range task.Templates {
if t.ChangeMode != TemplateChangeModeSignal {
continue
}
taskSignals[t.ChangeSignal] = struct{}{}
}
// Flatten and sort the signals
l := len(taskSignals)
if l == 0 {
continue
}
flat := make([]string, 0, l)
for sig := range taskSignals {
flat = append(flat, sig)
}
sort.Strings(flat)
tgSignals, ok := signals[tg.Name]
if !ok {
tgSignals = make(map[string][]string)
signals[tg.Name] = tgSignals
}
tgSignals[task.Name] = flat
}
}
return signals
}
// SpecChanged determines if the functional specification has changed between
// two job versions.
func (j *Job) SpecChanged(new *Job) bool {
if j == nil {
return new != nil
}
// Create a copy of the new job
c := new.Copy()
// Update the new job so we can do a reflect
c.Status = j.Status
c.StatusDescription = j.StatusDescription
c.Stable = j.Stable
c.Version = j.Version
c.CreateIndex = j.CreateIndex
c.ModifyIndex = j.ModifyIndex
c.JobModifyIndex = j.JobModifyIndex
c.SubmitTime = j.SubmitTime
// cgbaker: FINISH: probably need some consideration of scaling policy ID here
// Deep equals the jobs
return !reflect.DeepEqual(j, c)
}
func (j *Job) SetSubmitTime() {
j.SubmitTime = time.Now().UTC().UnixNano()
}
// JobListStub is used to return a subset of job information
// for the job list
type JobListStub struct {
ID string
ParentID string
Name string
Namespace string `json:",omitempty"`
Datacenters []string
Multiregion *Multiregion
Type string
Priority int
Periodic bool
ParameterizedJob bool
Stop bool
Status string
StatusDescription string
JobSummary *JobSummary
CreateIndex uint64
ModifyIndex uint64
JobModifyIndex uint64
SubmitTime int64
}
// JobSummary summarizes the state of the allocations of a job
type JobSummary struct {
// JobID is the ID of the job the summary is for
JobID string
// Namespace is the namespace of the job and its summary
Namespace string
// Summary contains the summary per task group for the Job
Summary map[string]TaskGroupSummary
// Children contains a summary for the children of this job.
Children *JobChildrenSummary
// Raft Indexes
CreateIndex uint64
ModifyIndex uint64
}
// Copy returns a new copy of JobSummary
func (js *JobSummary) Copy() *JobSummary {
newJobSummary := new(JobSummary)
*newJobSummary = *js
newTGSummary := make(map[string]TaskGroupSummary, len(js.Summary))
for k, v := range js.Summary {
newTGSummary[k] = v
}
newJobSummary.Summary = newTGSummary
newJobSummary.Children = newJobSummary.Children.Copy()
return newJobSummary
}
// JobChildrenSummary contains the summary of children job statuses
type JobChildrenSummary struct {
Pending int64
Running int64
Dead int64
}
// Copy returns a new copy of a JobChildrenSummary
func (jc *JobChildrenSummary) Copy() *JobChildrenSummary {
if jc == nil {
return nil
}
njc := new(JobChildrenSummary)
*njc = *jc
return njc
}
// TaskGroup summarizes the state of all the allocations of a particular
// TaskGroup
type TaskGroupSummary struct {
Queued int
Complete int
Failed int
Running int
Starting int
Lost int
}
const (
// Checks uses any registered health check state in combination with task
// states to determine if a allocation is healthy.
UpdateStrategyHealthCheck_Checks = "checks"
// TaskStates uses the task states of an allocation to determine if the
// allocation is healthy.
UpdateStrategyHealthCheck_TaskStates = "task_states"
// Manual allows the operator to manually signal to Nomad when an
// allocations is healthy. This allows more advanced health checking that is
// outside of the scope of Nomad.
UpdateStrategyHealthCheck_Manual = "manual"
)
var (
// DefaultUpdateStrategy provides a baseline that can be used to upgrade
// jobs with the old policy or for populating field defaults.
DefaultUpdateStrategy = &UpdateStrategy{
Stagger: 30 * time.Second,
MaxParallel: 1,
HealthCheck: UpdateStrategyHealthCheck_Checks,
MinHealthyTime: 10 * time.Second,
HealthyDeadline: 5 * time.Minute,
ProgressDeadline: 10 * time.Minute,
AutoRevert: false,
AutoPromote: false,
Canary: 0,
}
)
// UpdateStrategy is used to modify how updates are done
type UpdateStrategy struct {
// Stagger is used to determine the rate at which allocations are migrated
// due to down or draining nodes.
Stagger time.Duration
// MaxParallel is how many updates can be done in parallel
MaxParallel int
// HealthCheck specifies the mechanism in which allocations are marked
// healthy or unhealthy as part of a deployment.
HealthCheck string
// MinHealthyTime is the minimum time an allocation must be in the healthy
// state before it is marked as healthy, unblocking more allocations to be
// rolled.
MinHealthyTime time.Duration
// HealthyDeadline is the time in which an allocation must be marked as
// healthy before it is automatically transitioned to unhealthy. This time
// period doesn't count against the MinHealthyTime.
HealthyDeadline time.Duration
// ProgressDeadline is the time in which an allocation as part of the
// deployment must transition to healthy. If no allocation becomes healthy
// after the deadline, the deployment is marked as failed. If the deadline
// is zero, the first failure causes the deployment to fail.
ProgressDeadline time.Duration
// AutoRevert declares that if a deployment fails because of unhealthy
// allocations, there should be an attempt to auto-revert the job to a
// stable version.
AutoRevert bool
// AutoPromote declares that the deployment should be promoted when all canaries are
// healthy
AutoPromote bool
// Canary is the number of canaries to deploy when a change to the task
// group is detected.
Canary int
}
func (u *UpdateStrategy) Copy() *UpdateStrategy {
if u == nil {
return nil
}
copy := new(UpdateStrategy)
*copy = *u
return copy
}
func (u *UpdateStrategy) Validate() error {
if u == nil {
return nil
}
var mErr multierror.Error
switch u.HealthCheck {
case UpdateStrategyHealthCheck_Checks, UpdateStrategyHealthCheck_TaskStates, UpdateStrategyHealthCheck_Manual:
default:
multierror.Append(&mErr, fmt.Errorf("Invalid health check given: %q", u.HealthCheck))
}
if u.MaxParallel < 0 {
multierror.Append(&mErr, fmt.Errorf("Max parallel can not be less than zero: %d < 0", u.MaxParallel))
}
if u.Canary < 0 {
multierror.Append(&mErr, fmt.Errorf("Canary count can not be less than zero: %d < 0", u.Canary))
}
if u.Canary == 0 && u.AutoPromote {
multierror.Append(&mErr, fmt.Errorf("Auto Promote requires a Canary count greater than zero"))
}
if u.MinHealthyTime < 0 {
multierror.Append(&mErr, fmt.Errorf("Minimum healthy time may not be less than zero: %v", u.MinHealthyTime))
}
if u.HealthyDeadline <= 0 {
multierror.Append(&mErr, fmt.Errorf("Healthy deadline must be greater than zero: %v", u.HealthyDeadline))
}
if u.ProgressDeadline < 0 {
multierror.Append(&mErr, fmt.Errorf("Progress deadline must be zero or greater: %v", u.ProgressDeadline))
}
if u.MinHealthyTime >= u.HealthyDeadline {
multierror.Append(&mErr, fmt.Errorf("Minimum healthy time must be less than healthy deadline: %v > %v", u.MinHealthyTime, u.HealthyDeadline))
}
if u.ProgressDeadline != 0 && u.HealthyDeadline >= u.ProgressDeadline {
multierror.Append(&mErr, fmt.Errorf("Healthy deadline must be less than progress deadline: %v > %v", u.HealthyDeadline, u.ProgressDeadline))
}
if u.Stagger <= 0 {
multierror.Append(&mErr, fmt.Errorf("Stagger must be greater than zero: %v", u.Stagger))
}
return mErr.ErrorOrNil()
}
func (u *UpdateStrategy) IsEmpty() bool {
if u == nil {
return true
}
return u.MaxParallel == 0
}
// TODO(alexdadgar): Remove once no longer used by the scheduler.
// Rolling returns if a rolling strategy should be used
func (u *UpdateStrategy) Rolling() bool {
return u.Stagger > 0 && u.MaxParallel > 0
}
type Multiregion struct {
Strategy *MultiregionStrategy
Regions []*MultiregionRegion
}
func (m *Multiregion) Canonicalize() {
if m.Strategy == nil {
m.Strategy = &MultiregionStrategy{}
}
if m.Regions == nil {
m.Regions = []*MultiregionRegion{}
}
}
// Diff indicates whether the multiregion config has changed
func (m *Multiregion) Diff(m2 *Multiregion) bool {
return !reflect.DeepEqual(m, m2)
}
func (m *Multiregion) Copy() *Multiregion {
if m == nil {
return nil
}
copy := new(Multiregion)
if m.Strategy != nil {
copy.Strategy = &MultiregionStrategy{
MaxParallel: m.Strategy.MaxParallel,
OnFailure: m.Strategy.OnFailure,
}
}
for _, region := range m.Regions {
copyRegion := &MultiregionRegion{
Name: region.Name,
Count: region.Count,
Datacenters: []string{},
Meta: map[string]string{},
}
for _, dc := range region.Datacenters {
copyRegion.Datacenters = append(copyRegion.Datacenters, dc)
}
for k, v := range region.Meta {
copyRegion.Meta[k] = v
}
copy.Regions = append(copy.Regions, copyRegion)
}
return copy
}
type MultiregionStrategy struct {
MaxParallel int
OnFailure string
}
type MultiregionRegion struct {
Name string
Count int
Datacenters []string
Meta map[string]string
}
// Namespace allows logically grouping jobs and their associated objects.
type Namespace struct {
// Name is the name of the namespace
Name string
// Description is a human readable description of the namespace
Description string
// Quota is the quota specification that the namespace should account
// against.
Quota string
// Hash is the hash of the namespace which is used to efficiently replicate
// cross-regions.
Hash []byte
// Raft Indexes
CreateIndex uint64
ModifyIndex uint64
}
func (n *Namespace) Validate() error {
var mErr multierror.Error
// Validate the name and description
if !validNamespaceName.MatchString(n.Name) {
err := fmt.Errorf("invalid name %q. Must match regex %s", n.Name, validNamespaceName)
mErr.Errors = append(mErr.Errors, err)
}
if len(n.Description) > maxNamespaceDescriptionLength {
err := fmt.Errorf("description longer than %d", maxNamespaceDescriptionLength)
mErr.Errors = append(mErr.Errors, err)
}
return mErr.ErrorOrNil()
}
// SetHash is used to compute and set the hash of the namespace
func (n *Namespace) SetHash() []byte {
// Initialize a 256bit Blake2 hash (32 bytes)
hash, err := blake2b.New256(nil)
if err != nil {
panic(err)
}
// Write all the user set fields
hash.Write([]byte(n.Name))
hash.Write([]byte(n.Description))
hash.Write([]byte(n.Quota))
// Finalize the hash
hashVal := hash.Sum(nil)
// Set and return the hash
n.Hash = hashVal
return hashVal
}
func (n *Namespace) Copy() *Namespace {
nc := new(Namespace)
*nc = *n
nc.Hash = make([]byte, len(n.Hash))
copy(nc.Hash, n.Hash)
return nc
}
// NamespaceListRequest is used to request a list of namespaces
type NamespaceListRequest struct {
QueryOptions
}
// NamespaceListResponse is used for a list request
type NamespaceListResponse struct {
Namespaces []*Namespace
QueryMeta
}
// NamespaceSpecificRequest is used to query a specific namespace
type NamespaceSpecificRequest struct {
Name string
QueryOptions
}
// SingleNamespaceResponse is used to return a single namespace
type SingleNamespaceResponse struct {
Namespace *Namespace
QueryMeta
}
// NamespaceSetRequest is used to query a set of namespaces
type NamespaceSetRequest struct {
Namespaces []string
QueryOptions
}
// NamespaceSetResponse is used to return a set of namespaces
type NamespaceSetResponse struct {
Namespaces map[string]*Namespace // Keyed by namespace Name
QueryMeta
}
// NamespaceDeleteRequest is used to delete a set of namespaces
type NamespaceDeleteRequest struct {
Namespaces []string
WriteRequest
}
// NamespaceUpsertRequest is used to upsert a set of namespaces
type NamespaceUpsertRequest struct {
Namespaces []*Namespace
WriteRequest
}
const (
// PeriodicSpecCron is used for a cron spec.
PeriodicSpecCron = "cron"
// PeriodicSpecTest is only used by unit tests. It is a sorted, comma
// separated list of unix timestamps at which to launch.
PeriodicSpecTest = "_internal_test"
)
// Periodic defines the interval a job should be run at.
type PeriodicConfig struct {
// Enabled determines if the job should be run periodically.
Enabled bool
// Spec specifies the interval the job should be run as. It is parsed based
// on the SpecType.
Spec string
// SpecType defines the format of the spec.
SpecType string
// ProhibitOverlap enforces that spawned jobs do not run in parallel.
ProhibitOverlap bool
// TimeZone is the user specified string that determines the time zone to
// launch against. The time zones must be specified from IANA Time Zone
// database, such as "America/New_York".
// Reference: https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
// Reference: https://www.iana.org/time-zones
TimeZone string
// location is the time zone to evaluate the launch time against
location *time.Location
}
func (p *PeriodicConfig) Copy() *PeriodicConfig {
if p == nil {
return nil
}
np := new(PeriodicConfig)
*np = *p
return np
}
func (p *PeriodicConfig) Validate() error {
if !p.Enabled {
return nil
}
var mErr multierror.Error
if p.Spec == "" {
multierror.Append(&mErr, fmt.Errorf("Must specify a spec"))
}
// Check if we got a valid time zone
if p.TimeZone != "" {
if _, err := time.LoadLocation(p.TimeZone); err != nil {
multierror.Append(&mErr, fmt.Errorf("Invalid time zone %q: %v", p.TimeZone, err))
}
}
switch p.SpecType {
case PeriodicSpecCron:
// Validate the cron spec
if _, err := cronexpr.Parse(p.Spec); err != nil {
multierror.Append(&mErr, fmt.Errorf("Invalid cron spec %q: %v", p.Spec, err))
}
case PeriodicSpecTest:
// No-op
default:
multierror.Append(&mErr, fmt.Errorf("Unknown periodic specification type %q", p.SpecType))
}
return mErr.ErrorOrNil()
}
func (p *PeriodicConfig) Canonicalize() {
// Load the location
l, err := time.LoadLocation(p.TimeZone)
if err != nil {
p.location = time.UTC
}
p.location = l
}
// CronParseNext is a helper that parses the next time for the given expression
// but captures any panic that may occur in the underlying library.
func CronParseNext(e *cronexpr.Expression, fromTime time.Time, spec string) (t time.Time, err error) {
defer func() {
if recover() != nil {
t = time.Time{}
err = fmt.Errorf("failed parsing cron expression: %q", spec)
}
}()
return e.Next(fromTime), nil
}
// Next returns the closest time instant matching the spec that is after the
// passed time. If no matching instance exists, the zero value of time.Time is
// returned. The `time.Location` of the returned value matches that of the
// passed time.
func (p *PeriodicConfig) Next(fromTime time.Time) (time.Time, error) {
switch p.SpecType {
case PeriodicSpecCron:
e, err := cronexpr.Parse(p.Spec)
if err != nil {
return time.Time{}, fmt.Errorf("failed parsing cron expression: %q: %v", p.Spec, err)
}
return CronParseNext(e, fromTime, p.Spec)
case PeriodicSpecTest:
split := strings.Split(p.Spec, ",")
if len(split) == 1 && split[0] == "" {
return time.Time{}, nil
}
// Parse the times
times := make([]time.Time, len(split))
for i, s := range split {
unix, err := strconv.Atoi(s)
if err != nil {
return time.Time{}, nil
}
times[i] = time.Unix(int64(unix), 0)
}
// Find the next match
for _, next := range times {
if fromTime.Before(next) {
return next, nil
}
}
}
return time.Time{}, nil
}
// GetLocation returns the location to use for determining the time zone to run
// the periodic job against.
func (p *PeriodicConfig) GetLocation() *time.Location {
// Jobs pre 0.5.5 will not have this
if p.location != nil {
return p.location
}
return time.UTC
}
const (
// PeriodicLaunchSuffix is the string appended to the periodic jobs ID
// when launching derived instances of it.
PeriodicLaunchSuffix = "/periodic-"
)
// PeriodicLaunch tracks the last launch time of a periodic job.
type PeriodicLaunch struct {
ID string // ID of the periodic job.
Namespace string // Namespace of the periodic job
Launch time.Time // The last launch time.
// Raft Indexes
CreateIndex uint64
ModifyIndex uint64
}
const (
DispatchPayloadForbidden = "forbidden"
DispatchPayloadOptional = "optional"
DispatchPayloadRequired = "required"
// DispatchLaunchSuffix is the string appended to the parameterized job's ID
// when dispatching instances of it.
DispatchLaunchSuffix = "/dispatch-"
)
// ParameterizedJobConfig is used to configure the parameterized job
type ParameterizedJobConfig struct {
// Payload configure the payload requirements
Payload string
// MetaRequired is metadata keys that must be specified by the dispatcher
MetaRequired []string
// MetaOptional is metadata keys that may be specified by the dispatcher
MetaOptional []string
}
func (d *ParameterizedJobConfig) Validate() error {
var mErr multierror.Error
switch d.Payload {
case DispatchPayloadOptional, DispatchPayloadRequired, DispatchPayloadForbidden:
default:
multierror.Append(&mErr, fmt.Errorf("Unknown payload requirement: %q", d.Payload))
}
// Check that the meta configurations are disjoint sets
disjoint, offending := helper.SliceSetDisjoint(d.MetaRequired, d.MetaOptional)
if !disjoint {
multierror.Append(&mErr, fmt.Errorf("Required and optional meta keys should be disjoint. Following keys exist in both: %v", offending))
}
return mErr.ErrorOrNil()
}
func (d *ParameterizedJobConfig) Canonicalize() {
if d.Payload == "" {
d.Payload = DispatchPayloadOptional
}
}
func (d *ParameterizedJobConfig) Copy() *ParameterizedJobConfig {
if d == nil {
return nil
}
nd := new(ParameterizedJobConfig)
*nd = *d
nd.MetaOptional = helper.CopySliceString(nd.MetaOptional)
nd.MetaRequired = helper.CopySliceString(nd.MetaRequired)
return nd
}
// DispatchedID returns an ID appropriate for a job dispatched against a
// particular parameterized job
func DispatchedID(templateID string, t time.Time) string {
u := uuid.Generate()[:8]
return fmt.Sprintf("%s%s%d-%s", templateID, DispatchLaunchSuffix, t.Unix(), u)
}
// DispatchPayloadConfig configures how a task gets its input from a job dispatch
type DispatchPayloadConfig struct {
// File specifies a relative path to where the input data should be written
File string
}
func (d *DispatchPayloadConfig) Copy() *DispatchPayloadConfig {
if d == nil {
return nil
}
nd := new(DispatchPayloadConfig)
*nd = *d
return nd
}
func (d *DispatchPayloadConfig) Validate() error {
// Verify the destination doesn't escape
escaped, err := PathEscapesAllocDir("task/local/", d.File)
if err != nil {
return fmt.Errorf("invalid destination path: %v", err)
} else if escaped {
return fmt.Errorf("destination escapes allocation directory")
}
return nil
}
const (
TaskLifecycleHookPrestart = "prestart"
TaskLifecycleHookPoststart = "poststart"
)
type TaskLifecycleConfig struct {
Hook string
Sidecar bool
}
func (d *TaskLifecycleConfig) Copy() *TaskLifecycleConfig {
if d == nil {
return nil
}
nd := new(TaskLifecycleConfig)
*nd = *d
return nd
}
func (d *TaskLifecycleConfig) Validate() error {
if d == nil {
return nil
}
switch d.Hook {
case TaskLifecycleHookPrestart:
case TaskLifecycleHookPoststart:
case "":
return fmt.Errorf("no lifecycle hook provided")
default:
return fmt.Errorf("invalid hook: %v", d.Hook)
}
return nil
}
var (
// These default restart policies needs to be in sync with
// Canonicalize in api/tasks.go
DefaultServiceJobRestartPolicy = RestartPolicy{
Delay: 15 * time.Second,
Attempts: 2,
Interval: 30 * time.Minute,
Mode: RestartPolicyModeFail,
}
DefaultBatchJobRestartPolicy = RestartPolicy{
Delay: 15 * time.Second,
Attempts: 3,
Interval: 24 * time.Hour,
Mode: RestartPolicyModeFail,
}
)
var (
// These default reschedule policies needs to be in sync with
// NewDefaultReschedulePolicy in api/tasks.go
DefaultServiceJobReschedulePolicy = ReschedulePolicy{
Delay: 30 * time.Second,
DelayFunction: "exponential",
MaxDelay: 1 * time.Hour,
Unlimited: true,
}
DefaultBatchJobReschedulePolicy = ReschedulePolicy{
Attempts: 1,
Interval: 24 * time.Hour,
Delay: 5 * time.Second,
DelayFunction: "constant",
}
)
const (
// RestartPolicyModeDelay causes an artificial delay till the next interval is
// reached when the specified attempts have been reached in the interval.
RestartPolicyModeDelay = "delay"
// RestartPolicyModeFail causes a job to fail if the specified number of
// attempts are reached within an interval.
RestartPolicyModeFail = "fail"
// RestartPolicyMinInterval is the minimum interval that is accepted for a
// restart policy.
RestartPolicyMinInterval = 5 * time.Second
// ReasonWithinPolicy describes restart events that are within policy
ReasonWithinPolicy = "Restart within policy"
)
// JobScalingEvents contains the scaling events for a given job
type JobScalingEvents struct {
Namespace string
JobID string
// This map is indexed by target; currently, this is just task group
// the indexed array is sorted from newest to oldest event
// the array should have less than JobTrackedScalingEvents entries
ScalingEvents map[string][]*ScalingEvent
// Raft index
ModifyIndex uint64
}
// Factory method for ScalingEvent objects
func NewScalingEvent(message string) *ScalingEvent {
return &ScalingEvent{
Time: time.Now().Unix(),
Message: message,
}
}
// ScalingEvent describes a scaling event against a Job
type ScalingEvent struct {
// Unix Nanosecond timestamp for the scaling event
Time int64
// Count is the new scaling count, if provided
Count *int64
// PreviousCount is the count at the time of the scaling event
PreviousCount int64
// Message is the message describing a scaling event
Message string
// Error indicates an error state for this scaling event
Error bool
// Meta is a map of metadata returned during a scaling event
Meta map[string]interface{}
// EvalID is the ID for an evaluation if one was created as part of a scaling event
EvalID *string
// Raft index
CreateIndex uint64
}
func (e *ScalingEvent) SetError(error bool) *ScalingEvent {
e.Error = error
return e
}
func (e *ScalingEvent) SetMeta(meta map[string]interface{}) *ScalingEvent {
e.Meta = meta
return e
}
func (e *ScalingEvent) SetEvalID(evalID string) *ScalingEvent {
e.EvalID = &evalID
return e
}
// ScalingEventRequest is by for Job.Scale endpoint
// to register scaling events
type ScalingEventRequest struct {
Namespace string
JobID string
TaskGroup string
ScalingEvent *ScalingEvent
}
// ScalingPolicy specifies the scaling policy for a scaling target
type ScalingPolicy struct {
// ID is a generated UUID used for looking up the scaling policy
ID string
// Type is the type of scaling performed by the policy
Type string
// Target contains information about the target of the scaling policy, like job and group
Target map[string]string
// Policy is an opaque description of the scaling policy, passed to the autoscaler
Policy map[string]interface{}
// Min is the minimum allowable scaling count for this target
Min int64
// Max is the maximum allowable scaling count for this target
Max int64
// Enabled indicates whether this policy has been enabled/disabled
Enabled bool
CreateIndex uint64
ModifyIndex uint64
}
// JobKey returns a key that is unique to a job-scoped target, useful as a map
// key. This uses the policy type, plus target (group and task).
func (p *ScalingPolicy) JobKey() string {
return p.Type + "\000" +
p.Target[ScalingTargetGroup] + "\000" +
p.Target[ScalingTargetTask]
}
const (
ScalingTargetNamespace = "Namespace"
ScalingTargetJob = "Job"
ScalingTargetGroup = "Group"
ScalingTargetTask = "Task"
ScalingPolicyTypeHorizontal = "horizontal"
)
func (p *ScalingPolicy) Canonicalize() {
if p.Type == "" {
p.Type = ScalingPolicyTypeHorizontal
}
}
func (p *ScalingPolicy) Copy() *ScalingPolicy {
if p == nil {
return nil
}
opaquePolicyConfig, err := copystructure.Copy(p.Policy)
if err != nil {
panic(err.Error())
}
c := ScalingPolicy{
ID: p.ID,
Policy: opaquePolicyConfig.(map[string]interface{}),
Enabled: p.Enabled,
Type: p.Type,
Min: p.Min,
Max: p.Max,
CreateIndex: p.CreateIndex,
ModifyIndex: p.ModifyIndex,
}
c.Target = make(map[string]string, len(p.Target))
for k, v := range p.Target {
c.Target[k] = v
}
return &c
}
func (p *ScalingPolicy) Validate() error {
if p == nil {
return nil
}
var mErr multierror.Error
// Check policy type and target
if p.Type == "" {
mErr.Errors = append(mErr.Errors, fmt.Errorf("missing scaling policy type"))
} else {
mErr.Errors = append(mErr.Errors, p.validateType().Errors...)
}
// Check Min and Max
if p.Max < 0 {
mErr.Errors = append(mErr.Errors,
fmt.Errorf("maximum count must be specified and non-negative"))
} else {
if p.Max < p.Min {
mErr.Errors = append(mErr.Errors,
fmt.Errorf("maximum count must not be less than minimum count"))
}
}
if p.Min < 0 {
mErr.Errors = append(mErr.Errors,
fmt.Errorf("minimum count must be specified and non-negative"))
}
return mErr.ErrorOrNil()
}
func (p *ScalingPolicy) validateTargetHorizontal() (mErr multierror.Error) {
if len(p.Target) == 0 {
// This is probably not a Nomad horizontal policy
return
}
// Nomad horizontal policies should have Namespace, Job and TaskGroup
if p.Target[ScalingTargetNamespace] == "" {
mErr.Errors = append(mErr.Errors, fmt.Errorf("missing target namespace"))
}
if p.Target[ScalingTargetJob] == "" {
mErr.Errors = append(mErr.Errors, fmt.Errorf("missing target job"))
}
if p.Target[ScalingTargetGroup] == "" {
mErr.Errors = append(mErr.Errors, fmt.Errorf("missing target group"))
}
return
}
// Diff indicates whether the specification for a given scaling policy has changed
func (p *ScalingPolicy) Diff(p2 *ScalingPolicy) bool {
copy := *p2
copy.ID = p.ID
copy.CreateIndex = p.CreateIndex
copy.ModifyIndex = p.ModifyIndex
return !reflect.DeepEqual(*p, copy)
}
// TarketTaskGroup updates a ScalingPolicy target to specify a given task group
func (p *ScalingPolicy) TargetTaskGroup(job *Job, tg *TaskGroup) *ScalingPolicy {
p.Target = map[string]string{
ScalingTargetNamespace: job.Namespace,
ScalingTargetJob: job.ID,
ScalingTargetGroup: tg.Name,
}
return p
}
// TargetTask updates a ScalingPolicy target to specify a given task
func (p *ScalingPolicy) TargetTask(job *Job, tg *TaskGroup, task *Task) *ScalingPolicy {
p.TargetTaskGroup(job, tg)
p.Target[ScalingTargetTask] = task.Name
return p
}
func (p *ScalingPolicy) Stub() *ScalingPolicyListStub {
stub := &ScalingPolicyListStub{
ID: p.ID,
Type: p.Type,
Target: make(map[string]string),
Enabled: p.Enabled,
CreateIndex: p.CreateIndex,
ModifyIndex: p.ModifyIndex,
}
for k, v := range p.Target {
stub.Target[k] = v
}
return stub
}
// GetScalingPolicies returns a slice of all scaling scaling policies for this job
func (j *Job) GetScalingPolicies() []*ScalingPolicy {
ret := make([]*ScalingPolicy, 0)
for _, tg := range j.TaskGroups {
if tg.Scaling != nil {
ret = append(ret, tg.Scaling)
}
}
ret = append(ret, j.GetEntScalingPolicies()...)
return ret
}
// ScalingPolicyListStub is used to return a subset of scaling policy information
// for the scaling policy list
type ScalingPolicyListStub struct {
ID string
Enabled bool
Type string
Target map[string]string
CreateIndex uint64
ModifyIndex uint64
}
// RestartPolicy configures how Tasks are restarted when they crash or fail.
type RestartPolicy struct {
// Attempts is the number of restart that will occur in an interval.
Attempts int
// Interval is a duration in which we can limit the number of restarts
// within.
Interval time.Duration
// Delay is the time between a failure and a restart.
Delay time.Duration
// Mode controls what happens when the task restarts more than attempt times
// in an interval.
Mode string
}
func (r *RestartPolicy) Copy() *RestartPolicy {
if r == nil {
return nil
}
nrp := new(RestartPolicy)
*nrp = *r
return nrp
}
func (r *RestartPolicy) Validate() error {
var mErr multierror.Error
switch r.Mode {
case RestartPolicyModeDelay, RestartPolicyModeFail:
default:
multierror.Append(&mErr, fmt.Errorf("Unsupported restart mode: %q", r.Mode))
}
// Check for ambiguous/confusing settings
if r.Attempts == 0 && r.Mode != RestartPolicyModeFail {
multierror.Append(&mErr, fmt.Errorf("Restart policy %q with %d attempts is ambiguous", r.Mode, r.Attempts))
}
if r.Interval.Nanoseconds() < RestartPolicyMinInterval.Nanoseconds() {
multierror.Append(&mErr, fmt.Errorf("Interval can not be less than %v (got %v)", RestartPolicyMinInterval, r.Interval))
}
if time.Duration(r.Attempts)*r.Delay > r.Interval {
multierror.Append(&mErr,
fmt.Errorf("Nomad can't restart the TaskGroup %v times in an interval of %v with a delay of %v", r.Attempts, r.Interval, r.Delay))
}
return mErr.ErrorOrNil()
}
func NewRestartPolicy(jobType string) *RestartPolicy {
switch jobType {
case JobTypeService, JobTypeSystem:
rp := DefaultServiceJobRestartPolicy
return &rp
case JobTypeBatch:
rp := DefaultBatchJobRestartPolicy
return &rp
}
return nil
}
const ReschedulePolicyMinInterval = 15 * time.Second
const ReschedulePolicyMinDelay = 5 * time.Second
var RescheduleDelayFunctions = [...]string{"constant", "exponential", "fibonacci"}
// ReschedulePolicy configures how Tasks are rescheduled when they crash or fail.
type ReschedulePolicy struct {
// Attempts limits the number of rescheduling attempts that can occur in an interval.
Attempts int
// Interval is a duration in which we can limit the number of reschedule attempts.
Interval time.Duration
// Delay is a minimum duration to wait between reschedule attempts.
// The delay function determines how much subsequent reschedule attempts are delayed by.
Delay time.Duration
// DelayFunction determines how the delay progressively changes on subsequent reschedule
// attempts. Valid values are "exponential", "constant", and "fibonacci".
DelayFunction string
// MaxDelay is an upper bound on the delay.
MaxDelay time.Duration
// Unlimited allows infinite rescheduling attempts. Only allowed when delay is set
// between reschedule attempts.
Unlimited bool
}
func (r *ReschedulePolicy) Copy() *ReschedulePolicy {
if r == nil {
return nil
}
nrp := new(ReschedulePolicy)
*nrp = *r
return nrp
}
func (r *ReschedulePolicy) Enabled() bool {
enabled := r != nil && (r.Attempts > 0 || r.Unlimited)
return enabled
}
// Validate uses different criteria to validate the reschedule policy
// Delay must be a minimum of 5 seconds
// Delay Ceiling is ignored if Delay Function is "constant"
// Number of possible attempts is validated, given the interval, delay and delay function
func (r *ReschedulePolicy) Validate() error {
if !r.Enabled() {
return nil
}
var mErr multierror.Error
// Check for ambiguous/confusing settings
if r.Attempts > 0 {
if r.Interval <= 0 {
multierror.Append(&mErr, fmt.Errorf("Interval must be a non zero value if Attempts > 0"))
}
if r.Unlimited {
multierror.Append(&mErr, fmt.Errorf("Reschedule Policy with Attempts = %v, Interval = %v, "+
"and Unlimited = %v is ambiguous", r.Attempts, r.Interval, r.Unlimited))
multierror.Append(&mErr, errors.New("If Attempts >0, Unlimited cannot also be set to true"))
}
}
delayPreCheck := true
// Delay should be bigger than the default
if r.Delay.Nanoseconds() < ReschedulePolicyMinDelay.Nanoseconds() {
multierror.Append(&mErr, fmt.Errorf("Delay cannot be less than %v (got %v)", ReschedulePolicyMinDelay, r.Delay))
delayPreCheck = false
}
// Must use a valid delay function
if !isValidDelayFunction(r.DelayFunction) {
multierror.Append(&mErr, fmt.Errorf("Invalid delay function %q, must be one of %q", r.DelayFunction, RescheduleDelayFunctions))
delayPreCheck = false
}
// Validate MaxDelay if not using linear delay progression
if r.DelayFunction != "constant" {
if r.MaxDelay.Nanoseconds() < ReschedulePolicyMinDelay.Nanoseconds() {
multierror.Append(&mErr, fmt.Errorf("Max Delay cannot be less than %v (got %v)", ReschedulePolicyMinDelay, r.Delay))
delayPreCheck = false
}
if r.MaxDelay < r.Delay {
multierror.Append(&mErr, fmt.Errorf("Max Delay cannot be less than Delay %v (got %v)", r.Delay, r.MaxDelay))
delayPreCheck = false
}
}
// Validate Interval and other delay parameters if attempts are limited
if !r.Unlimited {
if r.Interval.Nanoseconds() < ReschedulePolicyMinInterval.Nanoseconds() {
multierror.Append(&mErr, fmt.Errorf("Interval cannot be less than %v (got %v)", ReschedulePolicyMinInterval, r.Interval))
}
if !delayPreCheck {
// We can't cross validate the rest of the delay params if delayPreCheck fails, so return early
return mErr.ErrorOrNil()
}
crossValidationErr := r.validateDelayParams()
if crossValidationErr != nil {
multierror.Append(&mErr, crossValidationErr)
}
}
return mErr.ErrorOrNil()
}
func isValidDelayFunction(delayFunc string) bool {
for _, value := range RescheduleDelayFunctions {
if value == delayFunc {
return true
}
}
return false
}
func (r *ReschedulePolicy) validateDelayParams() error {
ok, possibleAttempts, recommendedInterval := r.viableAttempts()
if ok {
return nil
}
var mErr multierror.Error
if r.DelayFunction == "constant" {
multierror.Append(&mErr, fmt.Errorf("Nomad can only make %v attempts in %v with initial delay %v and "+
"delay function %q", possibleAttempts, r.Interval, r.Delay, r.DelayFunction))
} else {
multierror.Append(&mErr, fmt.Errorf("Nomad can only make %v attempts in %v with initial delay %v, "+
"delay function %q, and delay ceiling %v", possibleAttempts, r.Interval, r.Delay, r.DelayFunction, r.MaxDelay))
}
multierror.Append(&mErr, fmt.Errorf("Set the interval to at least %v to accommodate %v attempts", recommendedInterval.Round(time.Second), r.Attempts))
return mErr.ErrorOrNil()
}
func (r *ReschedulePolicy) viableAttempts() (bool, int, time.Duration) {
var possibleAttempts int
var recommendedInterval time.Duration
valid := true
switch r.DelayFunction {
case "constant":
recommendedInterval = time.Duration(r.Attempts) * r.Delay
if r.Interval < recommendedInterval {
possibleAttempts = int(r.Interval / r.Delay)
valid = false
}
case "exponential":
for i := 0; i < r.Attempts; i++ {
nextDelay := time.Duration(math.Pow(2, float64(i))) * r.Delay
if nextDelay > r.MaxDelay {
nextDelay = r.MaxDelay
recommendedInterval += nextDelay
} else {
recommendedInterval = nextDelay
}
if recommendedInterval < r.Interval {
possibleAttempts++
}
}
if possibleAttempts < r.Attempts {
valid = false
}
case "fibonacci":
var slots []time.Duration
slots = append(slots, r.Delay)
slots = append(slots, r.Delay)
reachedCeiling := false
for i := 2; i < r.Attempts; i++ {
var nextDelay time.Duration
if reachedCeiling {
//switch to linear
nextDelay = slots[i-1] + r.MaxDelay
} else {
nextDelay = slots[i-1] + slots[i-2]
if nextDelay > r.MaxDelay {
nextDelay = r.MaxDelay
reachedCeiling = true
}
}
slots = append(slots, nextDelay)
}
recommendedInterval = slots[len(slots)-1]
if r.Interval < recommendedInterval {
valid = false
// calculate possible attempts
for i := 0; i < len(slots); i++ {
if slots[i] > r.Interval {
possibleAttempts = i
break
}
}
}
default:
return false, 0, 0
}
if possibleAttempts < 0 { // can happen if delay is bigger than interval
possibleAttempts = 0
}
return valid, possibleAttempts, recommendedInterval
}
func NewReschedulePolicy(jobType string) *ReschedulePolicy {
switch jobType {
case JobTypeService:
rp := DefaultServiceJobReschedulePolicy
return &rp
case JobTypeBatch:
rp := DefaultBatchJobReschedulePolicy
return &rp
}
return nil
}
const (
MigrateStrategyHealthChecks = "checks"
MigrateStrategyHealthStates = "task_states"
)
type MigrateStrategy struct {
MaxParallel int
HealthCheck string
MinHealthyTime time.Duration
HealthyDeadline time.Duration
}
// DefaultMigrateStrategy is used for backwards compat with pre-0.8 Allocations
// that lack an update strategy.
//
// This function should match its counterpart in api/tasks.go
func DefaultMigrateStrategy() *MigrateStrategy {
return &MigrateStrategy{
MaxParallel: 1,
HealthCheck: MigrateStrategyHealthChecks,
MinHealthyTime: 10 * time.Second,
HealthyDeadline: 5 * time.Minute,
}
}
func (m *MigrateStrategy) Validate() error {
var mErr multierror.Error
if m.MaxParallel < 0 {
multierror.Append(&mErr, fmt.Errorf("MaxParallel must be >= 0 but found %d", m.MaxParallel))
}
switch m.HealthCheck {
case MigrateStrategyHealthChecks, MigrateStrategyHealthStates:
// ok
case "":
if m.MaxParallel > 0 {
multierror.Append(&mErr, fmt.Errorf("Missing HealthCheck"))
}
default:
multierror.Append(&mErr, fmt.Errorf("Invalid HealthCheck: %q", m.HealthCheck))
}
if m.MinHealthyTime < 0 {
multierror.Append(&mErr, fmt.Errorf("MinHealthyTime is %s and must be >= 0", m.MinHealthyTime))
}
if m.HealthyDeadline < 0 {
multierror.Append(&mErr, fmt.Errorf("HealthyDeadline is %s and must be >= 0", m.HealthyDeadline))
}
if m.MinHealthyTime > m.HealthyDeadline {
multierror.Append(&mErr, fmt.Errorf("MinHealthyTime must be less than HealthyDeadline"))
}
return mErr.ErrorOrNil()
}
// TaskGroup is an atomic unit of placement. Each task group belongs to
// a job and may contain any number of tasks. A task group support running
// in many replicas using the same configuration..
type TaskGroup struct {
// Name of the task group
Name string
// Count is the number of replicas of this task group that should
// be scheduled.
Count int
// Update is used to control the update strategy for this task group
Update *UpdateStrategy
// Migrate is used to control the migration strategy for this task group
Migrate *MigrateStrategy
// Constraints can be specified at a task group level and apply to
// all the tasks contained.
Constraints []*Constraint
// Scaling is the list of autoscaling policies for the TaskGroup
Scaling *ScalingPolicy
// RestartPolicy of a TaskGroup
RestartPolicy *RestartPolicy
// Tasks are the collection of tasks that this task group needs to run
Tasks []*Task
// EphemeralDisk is the disk resources that the task group requests
EphemeralDisk *EphemeralDisk
// Meta is used to associate arbitrary metadata with this
// task group. This is opaque to Nomad.
Meta map[string]string
// ReschedulePolicy is used to configure how the scheduler should
// retry failed allocations.
ReschedulePolicy *ReschedulePolicy
// Affinities can be specified at the task group level to express
// scheduling preferences.
Affinities []*Affinity
// Spread can be specified at the task group level to express spreading
// allocations across a desired attribute, such as datacenter
Spreads []*Spread
// Networks are the network configuration for the task group. This can be
// overridden in the task.
Networks Networks
// Services this group provides
Services []*Service
// Volumes is a map of volumes that have been requested by the task group.
Volumes map[string]*VolumeRequest
// ShutdownDelay is the amount of time to wait between deregistering
// group services in consul and stopping tasks.
ShutdownDelay *time.Duration
// StopAfterClientDisconnect, if set, configures the client to stop the task group
// after this duration since the last known good heartbeat
StopAfterClientDisconnect *time.Duration
}
func (tg *TaskGroup) Copy() *TaskGroup {
if tg == nil {
return nil
}
ntg := new(TaskGroup)
*ntg = *tg
ntg.Update = ntg.Update.Copy()
ntg.Constraints = CopySliceConstraints(ntg.Constraints)
ntg.RestartPolicy = ntg.RestartPolicy.Copy()
ntg.ReschedulePolicy = ntg.ReschedulePolicy.Copy()
ntg.Affinities = CopySliceAffinities(ntg.Affinities)
ntg.Spreads = CopySliceSpreads(ntg.Spreads)
ntg.Volumes = CopyMapVolumeRequest(ntg.Volumes)
ntg.Scaling = ntg.Scaling.Copy()
// Copy the network objects
if tg.Networks != nil {
n := len(tg.Networks)
ntg.Networks = make([]*NetworkResource, n)
for i := 0; i < n; i++ {
ntg.Networks[i] = tg.Networks[i].Copy()
}
}
if tg.Tasks != nil {
tasks := make([]*Task, len(ntg.Tasks))
for i, t := range ntg.Tasks {
tasks[i] = t.Copy()
}
ntg.Tasks = tasks
}
ntg.Meta = helper.CopyMapStringString(ntg.Meta)
if tg.EphemeralDisk != nil {
ntg.EphemeralDisk = tg.EphemeralDisk.Copy()
}
if tg.Services != nil {
ntg.Services = make([]*Service, len(tg.Services))
for i, s := range tg.Services {
ntg.Services[i] = s.Copy()
}
}
if tg.ShutdownDelay != nil {
ntg.ShutdownDelay = tg.ShutdownDelay
}
if tg.StopAfterClientDisconnect != nil {
ntg.StopAfterClientDisconnect = tg.StopAfterClientDisconnect
}
return ntg
}
// Canonicalize is used to canonicalize fields in the TaskGroup.
func (tg *TaskGroup) Canonicalize(job *Job) {
// Ensure that an empty and nil map are treated the same to avoid scheduling
// problems since we use reflect DeepEquals.
if len(tg.Meta) == 0 {
tg.Meta = nil
}
// Set the default restart policy.
if tg.RestartPolicy == nil {
tg.RestartPolicy = NewRestartPolicy(job.Type)
}
if tg.ReschedulePolicy == nil {
tg.ReschedulePolicy = NewReschedulePolicy(job.Type)
}
// Canonicalize Migrate for service jobs
if job.Type == JobTypeService && tg.Migrate == nil {
tg.Migrate = DefaultMigrateStrategy()
}
// Set a default ephemeral disk object if the user has not requested for one
if tg.EphemeralDisk == nil {
tg.EphemeralDisk = DefaultEphemeralDisk()
}
if tg.Scaling != nil {
tg.Scaling.Canonicalize()
}
for _, service := range tg.Services {
service.Canonicalize(job.Name, tg.Name, "group")
}
for _, network := range tg.Networks {
network.Canonicalize()
}
for _, task := range tg.Tasks {
task.Canonicalize(job, tg)
}
}
// Validate is used to sanity check a task group
func (tg *TaskGroup) Validate(j *Job) error {
var mErr multierror.Error
if tg.Name == "" {
mErr.Errors = append(mErr.Errors, errors.New("Missing task group name"))
} else if strings.Contains(tg.Name, "\000") {
mErr.Errors = append(mErr.Errors, errors.New("Task group name contains null character"))
}
if tg.Count < 0 {
mErr.Errors = append(mErr.Errors, errors.New("Task group count can't be negative"))
}
if len(tg.Tasks) == 0 {
// could be a lone consul gateway inserted by the connect mutator
mErr.Errors = append(mErr.Errors, errors.New("Missing tasks for task group"))
}
for idx, constr := range tg.Constraints {
if err := constr.Validate(); err != nil {
outer := fmt.Errorf("Constraint %d validation failed: %s", idx+1, err)
mErr.Errors = append(mErr.Errors, outer)
}
}
if j.Type == JobTypeSystem {
if tg.Affinities != nil {
mErr.Errors = append(mErr.Errors, fmt.Errorf("System jobs may not have an affinity stanza"))
}
} else {
for idx, affinity := range tg.Affinities {
if err := affinity.Validate(); err != nil {
outer := fmt.Errorf("Affinity %d validation failed: %s", idx+1, err)
mErr.Errors = append(mErr.Errors, outer)
}
}
}
if tg.RestartPolicy != nil {
if err := tg.RestartPolicy.Validate(); err != nil {
mErr.Errors = append(mErr.Errors, err)
}
} else {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Task Group %v should have a restart policy", tg.Name))
}
if j.Type == JobTypeSystem {
if tg.Spreads != nil {
mErr.Errors = append(mErr.Errors, fmt.Errorf("System jobs may not have a spread stanza"))
}
} else {
for idx, spread := range tg.Spreads {
if err := spread.Validate(); err != nil {
outer := fmt.Errorf("Spread %d validation failed: %s", idx+1, err)
mErr.Errors = append(mErr.Errors, outer)
}
}
}
if j.Type == JobTypeSystem {
if tg.ReschedulePolicy != nil {
mErr.Errors = append(mErr.Errors, fmt.Errorf("System jobs should not have a reschedule policy"))
}
} else {
if tg.ReschedulePolicy != nil {
if err := tg.ReschedulePolicy.Validate(); err != nil {
mErr.Errors = append(mErr.Errors, err)
}
} else {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Task Group %v should have a reschedule policy", tg.Name))
}
}
if tg.EphemeralDisk != nil {
if err := tg.EphemeralDisk.Validate(); err != nil {
mErr.Errors = append(mErr.Errors, err)
}
} else {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Task Group %v should have an ephemeral disk object", tg.Name))
}
// Validate the update strategy
if u := tg.Update; u != nil {
switch j.Type {
case JobTypeService, JobTypeSystem:
default:
mErr.Errors = append(mErr.Errors, fmt.Errorf("Job type %q does not allow update block", j.Type))
}
if err := u.Validate(); err != nil {
mErr.Errors = append(mErr.Errors, err)
}
}
// Validate the migration strategy
switch j.Type {
case JobTypeService:
if tg.Migrate != nil {
if err := tg.Migrate.Validate(); err != nil {
mErr.Errors = append(mErr.Errors, err)
}
}
default:
if tg.Migrate != nil {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Job type %q does not allow migrate block", j.Type))
}
}
// Check that there is only one leader task if any
tasks := make(map[string]int)
leaderTasks := 0
for idx, task := range tg.Tasks {
if task.Name == "" {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Task %d missing name", idx+1))
} else if existing, ok := tasks[task.Name]; ok {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Task %d redefines '%s' from task %d", idx+1, task.Name, existing+1))
} else {
tasks[task.Name] = idx
}
if task.Leader {
leaderTasks++
}
}
if leaderTasks > 1 {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Only one task may be marked as leader"))
}
// Validate the Host Volumes
for name, decl := range tg.Volumes {
if !(decl.Type == VolumeTypeHost ||
decl.Type == VolumeTypeCSI) {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Volume %s has unrecognised type %s", name, decl.Type))
continue
}
if decl.Source == "" {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Volume %s has an empty source", name))
}
}
// Validate task group and task network resources
if err := tg.validateNetworks(); err != nil {
outer := fmt.Errorf("Task group network validation failed: %v", err)
mErr.Errors = append(mErr.Errors, outer)
}
// Validate task group and task services
if err := tg.validateServices(); err != nil {
outer := fmt.Errorf("Task group service validation failed: %v", err)
mErr.Errors = append(mErr.Errors, outer)
}
// Validate group service script-checks
if err := tg.validateScriptChecksInGroupServices(); err != nil {
outer := fmt.Errorf("Task group service check validation failed: %v", err)
mErr.Errors = append(mErr.Errors, outer)
}
// Validate the scaling policy
if err := tg.validateScalingPolicy(j); err != nil {
outer := fmt.Errorf("Task group scaling policy validation failed: %v", err)
mErr.Errors = append(mErr.Errors, outer)
}
// Validate the tasks
for _, task := range tg.Tasks {
// Validate the task does not reference undefined volume mounts
for i, mnt := range task.VolumeMounts {
if mnt.Volume == "" {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Task %s has a volume mount (%d) referencing an empty volume", task.Name, i))
continue
}
if _, ok := tg.Volumes[mnt.Volume]; !ok {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Task %s has a volume mount (%d) referencing undefined volume %s", task.Name, i, mnt.Volume))
continue
}
}
if err := task.Validate(tg.EphemeralDisk, j.Type, tg.Services); err != nil {
outer := fmt.Errorf("Task %s validation failed: %v", task.Name, err)
mErr.Errors = append(mErr.Errors, outer)
}
}
return mErr.ErrorOrNil()
}
func (tg *TaskGroup) validateNetworks() error {
var mErr multierror.Error
portLabels := make(map[string]string)
staticPorts := make(map[int]string)
for _, net := range tg.Networks {
for _, port := range append(net.ReservedPorts, net.DynamicPorts...) {
if other, ok := portLabels[port.Label]; ok {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Port label %s already in use by %s", port.Label, other))
} else {
portLabels[port.Label] = "taskgroup network"
}
if port.Value != 0 {
// static port
if other, ok := staticPorts[port.Value]; ok {
err := fmt.Errorf("Static port %d already reserved by %s", port.Value, other)
mErr.Errors = append(mErr.Errors, err)
} else if port.Value > math.MaxUint16 {
err := fmt.Errorf("Port %s (%d) cannot be greater than %d", port.Label, port.Value, math.MaxUint16)
mErr.Errors = append(mErr.Errors, err)
} else {
staticPorts[port.Value] = fmt.Sprintf("taskgroup network:%s", port.Label)
}
}
if port.To < -1 {
err := fmt.Errorf("Port %q cannot be mapped to negative value %d", port.Label, port.To)
mErr.Errors = append(mErr.Errors, err)
} else if port.To > math.MaxUint16 {
err := fmt.Errorf("Port %q cannot be mapped to a port (%d) greater than %d", port.Label, port.To, math.MaxUint16)
mErr.Errors = append(mErr.Errors, err)
}
}
}
// Check for duplicate tasks or port labels, and no duplicated static ports
for _, task := range tg.Tasks {
if task.Resources == nil {
continue
}
for _, net := range task.Resources.Networks {
for _, port := range append(net.ReservedPorts, net.DynamicPorts...) {
if other, ok := portLabels[port.Label]; ok {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Port label %s already in use by %s", port.Label, other))
}
if port.Value != 0 {
if other, ok := staticPorts[port.Value]; ok {
err := fmt.Errorf("Static port %d already reserved by %s", port.Value, other)
mErr.Errors = append(mErr.Errors, err)
} else if port.Value > math.MaxUint16 {
err := fmt.Errorf("Port %s (%d) cannot be greater than %d", port.Label, port.Value, math.MaxUint16)
mErr.Errors = append(mErr.Errors, err)
} else {
staticPorts[port.Value] = fmt.Sprintf("%s:%s", task.Name, port.Label)
}
}
}
}
}
return mErr.ErrorOrNil()
}
// validateServices runs Service.Validate() on group-level services,
// checks that group services do not conflict with task services and that
// group service checks that refer to tasks only refer to tasks that exist.
func (tg *TaskGroup) validateServices() error {
var mErr multierror.Error
knownTasks := make(map[string]struct{})
knownServices := make(map[string]struct{})
// Create a map of known tasks and their services so we can compare
// vs the group-level services and checks
for _, task := range tg.Tasks {
knownTasks[task.Name] = struct{}{}
if task.Services == nil {
continue
}
for _, service := range task.Services {
if _, ok := knownServices[service.Name+service.PortLabel]; ok {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Service %s is duplicate", service.Name))
}
for _, check := range service.Checks {
if check.TaskName != "" {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Check %s is invalid: only task group service checks can be assigned tasks", check.Name))
}
}
knownServices[service.Name+service.PortLabel] = struct{}{}
}
}
for i, service := range tg.Services {
if err := service.Validate(); err != nil {
outer := fmt.Errorf("Service[%d] %s validation failed: %s", i, service.Name, err)
mErr.Errors = append(mErr.Errors, outer)
// we break here to avoid the risk of crashing on null-pointer
// access in a later step, accepting that we might miss out on
// error messages to provide the user.
continue
}
if service.AddressMode == AddressModeDriver {
mErr.Errors = append(mErr.Errors, fmt.Errorf("service %q cannot use address_mode=\"driver\", only services defined in a \"task\" block can use this mode", service.Name))
}
if _, ok := knownServices[service.Name+service.PortLabel]; ok {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Service %s is duplicate", service.Name))
}
knownServices[service.Name+service.PortLabel] = struct{}{}
for _, check := range service.Checks {
if check.TaskName != "" {
if check.Type != ServiceCheckScript && check.Type != ServiceCheckGRPC {
mErr.Errors = append(mErr.Errors,
fmt.Errorf("Check %s invalid: only script and gRPC checks should have tasks", check.Name))
}
if check.AddressMode == AddressModeDriver {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Check %q invalid: cannot use address_mode=\"driver\", only checks defined in a \"task\" service block can use this mode", service.Name))
}
if _, ok := knownTasks[check.TaskName]; !ok {
mErr.Errors = append(mErr.Errors,
fmt.Errorf("Check %s invalid: refers to non-existent task %s", check.Name, check.TaskName))
}
}
}
}
return mErr.ErrorOrNil()
}
// validateScriptChecksInGroupServices ensures group-level services with script
// checks know what task driver to use. Either the service.task or service.check.task
// parameter must be configured.
func (tg *TaskGroup) validateScriptChecksInGroupServices() error {
var mErr multierror.Error
for _, service := range tg.Services {
if service.TaskName == "" {
for _, check := range service.Checks {
if check.Type == "script" && check.TaskName == "" {
mErr.Errors = append(mErr.Errors,
fmt.Errorf("Service [%s]->%s or Check %s must specify task parameter",
tg.Name, service.Name, check.Name,
))
}
}
}
}
return mErr.ErrorOrNil()
}
// validateScalingPolicy ensures that the scaling policy has consistent
// min and max, not in conflict with the task group count
func (tg *TaskGroup) validateScalingPolicy(j *Job) error {
if tg.Scaling == nil {
return nil
}
var mErr multierror.Error
err := tg.Scaling.Validate()
if err != nil {
// prefix scaling policy errors
if me, ok := err.(*multierror.Error); ok {
for _, e := range me.Errors {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Scaling policy invalid: %s", e))
}
}
}
if tg.Scaling.Max < int64(tg.Count) {
mErr.Errors = append(mErr.Errors,
fmt.Errorf("Scaling policy invalid: task group count must not be greater than maximum count in scaling policy"))
}
if int64(tg.Count) < tg.Scaling.Min && !(j.IsMultiregion() && tg.Count == 0 && j.Region == "global") {
mErr.Errors = append(mErr.Errors,
fmt.Errorf("Scaling policy invalid: task group count must not be less than minimum count in scaling policy"))
}
return mErr.ErrorOrNil()
}
// Warnings returns a list of warnings that may be from dubious settings or
// deprecation warnings.
func (tg *TaskGroup) Warnings(j *Job) error {
var mErr multierror.Error
// Validate the update strategy
if u := tg.Update; u != nil {
// Check the counts are appropriate
if u.MaxParallel > tg.Count && !(j.IsMultiregion() && tg.Count == 0) {
mErr.Errors = append(mErr.Errors,
fmt.Errorf("Update max parallel count is greater than task group count (%d > %d). "+
"A destructive change would result in the simultaneous replacement of all allocations.", u.MaxParallel, tg.Count))
}
}
for _, t := range tg.Tasks {
if err := t.Warnings(); err != nil {
err = multierror.Prefix(err, fmt.Sprintf("Task %q:", t.Name))
mErr.Errors = append(mErr.Errors, err)
}
}
return mErr.ErrorOrNil()
}
// LookupTask finds a task by name
func (tg *TaskGroup) LookupTask(name string) *Task {
for _, t := range tg.Tasks {
if t.Name == name {
return t
}
}
return nil
}
// UsesConnect for convenience returns true if the TaskGroup contains at least
// one service that makes use of Consul Connect features.
//
// Currently used for validating that the task group contains one or more connect
// aware services before generating a service identity token.
func (tg *TaskGroup) UsesConnect() bool {
for _, service := range tg.Services {
if service.Connect != nil {
if service.Connect.IsNative() || service.Connect.HasSidecar() || service.Connect.IsGateway() {
return true
}
}
}
return false
}
// UsesConnectGateway for convenience returns true if the TaskGroup contains at
// least one service that makes use of Consul Connect Gateway features.
func (tg *TaskGroup) UsesConnectGateway() bool {
for _, service := range tg.Services {
if service.Connect != nil {
if service.Connect.IsGateway() {
return true
}
}
}
return false
}
func (tg *TaskGroup) GoString() string {
return fmt.Sprintf("*%#v", *tg)
}
// CheckRestart describes if and when a task should be restarted based on
// failing health checks.
type CheckRestart struct {
Limit int // Restart task after this many unhealthy intervals
Grace time.Duration // Grace time to give tasks after starting to get healthy
IgnoreWarnings bool // If true treat checks in `warning` as passing
}
func (c *CheckRestart) Copy() *CheckRestart {
if c == nil {
return nil
}
nc := new(CheckRestart)
*nc = *c
return nc
}
func (c *CheckRestart) Equals(o *CheckRestart) bool {
if c == nil || o == nil {
return c == o
}
if c.Limit != o.Limit {
return false
}
if c.Grace != o.Grace {
return false
}
if c.IgnoreWarnings != o.IgnoreWarnings {
return false
}
return true
}
func (c *CheckRestart) Validate() error {
if c == nil {
return nil
}
var mErr multierror.Error
if c.Limit < 0 {
mErr.Errors = append(mErr.Errors, fmt.Errorf("limit must be greater than or equal to 0 but found %d", c.Limit))
}
if c.Grace < 0 {
mErr.Errors = append(mErr.Errors, fmt.Errorf("grace period must be greater than or equal to 0 but found %d", c.Grace))
}
return mErr.ErrorOrNil()
}
const (
// DefaultKillTimeout is the default timeout between signaling a task it
// will be killed and killing it.
DefaultKillTimeout = 5 * time.Second
)
// LogConfig provides configuration for log rotation
type LogConfig struct {
MaxFiles int
MaxFileSizeMB int
}
func (l *LogConfig) Equals(o *LogConfig) bool {
if l == nil || o == nil {
return l == o
}
if l.MaxFiles != o.MaxFiles {
return false
}
if l.MaxFileSizeMB != o.MaxFileSizeMB {
return false
}
return true
}
func (l *LogConfig) Copy() *LogConfig {
if l == nil {
return nil
}
return &LogConfig{
MaxFiles: l.MaxFiles,
MaxFileSizeMB: l.MaxFileSizeMB,
}
}
// DefaultLogConfig returns the default LogConfig values.
func DefaultLogConfig() *LogConfig {
return &LogConfig{
MaxFiles: 10,
MaxFileSizeMB: 10,
}
}
// Validate returns an error if the log config specified are less than
// the minimum allowed.
func (l *LogConfig) Validate() error {
var mErr multierror.Error
if l.MaxFiles < 1 {
mErr.Errors = append(mErr.Errors, fmt.Errorf("minimum number of files is 1; got %d", l.MaxFiles))
}
if l.MaxFileSizeMB < 1 {
mErr.Errors = append(mErr.Errors, fmt.Errorf("minimum file size is 1MB; got %d", l.MaxFileSizeMB))
}
return mErr.ErrorOrNil()
}
// Task is a single process typically that is executed as part of a task group.
type Task struct {
// Name of the task
Name string
// Driver is used to control which driver is used
Driver string
// User is used to determine which user will run the task. It defaults to
// the same user the Nomad client is being run as.
User string
// Config is provided to the driver to initialize
Config map[string]interface{}
// Map of environment variables to be used by the driver
Env map[string]string
// List of service definitions exposed by the Task
Services []*Service
// Vault is used to define the set of Vault policies that this task should
// have access to.
Vault *Vault
// Templates are the set of templates to be rendered for the task.
Templates []*Template
// Constraints can be specified at a task level and apply only to
// the particular task.
Constraints []*Constraint
// Affinities can be specified at the task level to express
// scheduling preferences
Affinities []*Affinity
// Resources is the resources needed by this task
Resources *Resources
// RestartPolicy of a TaskGroup
RestartPolicy *RestartPolicy
// DispatchPayload configures how the task retrieves its input from a dispatch
DispatchPayload *DispatchPayloadConfig
Lifecycle *TaskLifecycleConfig
// Meta is used to associate arbitrary metadata with this
// task. This is opaque to Nomad.
Meta map[string]string
// KillTimeout is the time between signaling a task that it will be
// killed and killing it.
KillTimeout time.Duration
// LogConfig provides configuration for log rotation
LogConfig *LogConfig
// Artifacts is a list of artifacts to download and extract before running
// the task.
Artifacts []*TaskArtifact
// Leader marks the task as the leader within the group. When the leader
// task exits, other tasks will be gracefully terminated.
Leader bool
// ShutdownDelay is the duration of the delay between deregistering a
// task from Consul and sending it a signal to shutdown. See #2441
ShutdownDelay time.Duration
// VolumeMounts is a list of Volume name <-> mount configurations that will be
// attached to this task.
VolumeMounts []*VolumeMount
// ScalingPolicies is a list of scaling policies scoped to this task
ScalingPolicies []*ScalingPolicy
// KillSignal is the kill signal to use for the task. This is an optional
// specification and defaults to SIGINT
KillSignal string
// Used internally to manage tasks according to their TaskKind. Initial use case
// is for Consul Connect
Kind TaskKind
// CSIPluginConfig is used to configure the plugin supervisor for the task.
CSIPluginConfig *TaskCSIPluginConfig
}
// UsesConnect is for conveniently detecting if the Task is able to make use
// of Consul Connect features. This will be indicated in the TaskKind of the
// Task, which exports known types of Tasks. UsesConnect will be true if the
// task is a connect proxy, connect native, or is a connect gateway.
func (t *Task) UsesConnect() bool {
return t.Kind.IsConnectNative() || t.UsesConnectSidecar()
}
func (t *Task) UsesConnectSidecar() bool {
return t.Kind.IsConnectProxy() || t.Kind.IsAnyConnectGateway()
}
func (t *Task) Copy() *Task {
if t == nil {
return nil
}
nt := new(Task)
*nt = *t
nt.Env = helper.CopyMapStringString(nt.Env)
if t.Services != nil {
services := make([]*Service, len(nt.Services))
for i, s := range nt.Services {
services[i] = s.Copy()
}
nt.Services = services
}
nt.Constraints = CopySliceConstraints(nt.Constraints)
nt.Affinities = CopySliceAffinities(nt.Affinities)
nt.VolumeMounts = CopySliceVolumeMount(nt.VolumeMounts)
nt.CSIPluginConfig = nt.CSIPluginConfig.Copy()
nt.Vault = nt.Vault.Copy()
nt.Resources = nt.Resources.Copy()
nt.LogConfig = nt.LogConfig.Copy()
nt.Meta = helper.CopyMapStringString(nt.Meta)
nt.DispatchPayload = nt.DispatchPayload.Copy()
nt.Lifecycle = nt.Lifecycle.Copy()
if t.Artifacts != nil {
artifacts := make([]*TaskArtifact, 0, len(t.Artifacts))
for _, a := range nt.Artifacts {
artifacts = append(artifacts, a.Copy())
}
nt.Artifacts = artifacts
}
if i, err := copystructure.Copy(nt.Config); err != nil {
panic(err.Error())
} else {
nt.Config = i.(map[string]interface{})
}
if t.Templates != nil {
templates := make([]*Template, len(t.Templates))
for i, tmpl := range nt.Templates {
templates[i] = tmpl.Copy()
}
nt.Templates = templates
}
return nt
}
// Canonicalize canonicalizes fields in the task.
func (t *Task) Canonicalize(job *Job, tg *TaskGroup) {
// Ensure that an empty and nil map are treated the same to avoid scheduling
// problems since we use reflect DeepEquals.
if len(t.Meta) == 0 {
t.Meta = nil
}
if len(t.Config) == 0 {
t.Config = nil
}
if len(t.Env) == 0 {
t.Env = nil
}
for _, service := range t.Services {
service.Canonicalize(job.Name, tg.Name, t.Name)
}
// If Resources are nil initialize them to defaults, otherwise canonicalize
if t.Resources == nil {
t.Resources = DefaultResources()
} else {
t.Resources.Canonicalize()
}
if t.RestartPolicy == nil {
t.RestartPolicy = tg.RestartPolicy
}
// Set the default timeout if it is not specified.
if t.KillTimeout == 0 {
t.KillTimeout = DefaultKillTimeout
}
if t.Vault != nil {
t.Vault.Canonicalize()
}
for _, template := range t.Templates {
template.Canonicalize()
}
}
func (t *Task) GoString() string {
return fmt.Sprintf("*%#v", *t)
}
// Validate is used to sanity check a task
func (t *Task) Validate(ephemeralDisk *EphemeralDisk, jobType string, tgServices []*Service) error {
var mErr multierror.Error
if t.Name == "" {
mErr.Errors = append(mErr.Errors, errors.New("Missing task name"))
}
if strings.ContainsAny(t.Name, `/\`) {
// We enforce this so that when creating the directory on disk it will
// not have any slashes.
mErr.Errors = append(mErr.Errors, errors.New("Task name cannot include slashes"))
} else if strings.Contains(t.Name, "\000") {
mErr.Errors = append(mErr.Errors, errors.New("Task name cannot include null characters"))
}
if t.Driver == "" {
mErr.Errors = append(mErr.Errors, errors.New("Missing task driver"))
}
if t.KillTimeout < 0 {
mErr.Errors = append(mErr.Errors, errors.New("KillTimeout must be a positive value"))
}
if t.ShutdownDelay < 0 {
mErr.Errors = append(mErr.Errors, errors.New("ShutdownDelay must be a positive value"))
}
// Validate the resources.
if t.Resources == nil {
mErr.Errors = append(mErr.Errors, errors.New("Missing task resources"))
} else if err := t.Resources.Validate(); err != nil {
mErr.Errors = append(mErr.Errors, err)
}
// Validate the log config
if t.LogConfig == nil {
mErr.Errors = append(mErr.Errors, errors.New("Missing Log Config"))
} else if err := t.LogConfig.Validate(); err != nil {
mErr.Errors = append(mErr.Errors, err)
}
for idx, constr := range t.Constraints {
if err := constr.Validate(); err != nil {
outer := fmt.Errorf("Constraint %d validation failed: %s", idx+1, err)
mErr.Errors = append(mErr.Errors, outer)
}
switch constr.Operand {
case ConstraintDistinctHosts, ConstraintDistinctProperty:
outer := fmt.Errorf("Constraint %d has disallowed Operand at task level: %s", idx+1, constr.Operand)
mErr.Errors = append(mErr.Errors, outer)
}
}
if jobType == JobTypeSystem {
if t.Affinities != nil {
mErr.Errors = append(mErr.Errors, fmt.Errorf("System jobs may not have an affinity stanza"))
}
} else {
for idx, affinity := range t.Affinities {
if err := affinity.Validate(); err != nil {
outer := fmt.Errorf("Affinity %d validation failed: %s", idx+1, err)
mErr.Errors = append(mErr.Errors, outer)
}
}
}
// Validate Services
if err := validateServices(t); err != nil {
mErr.Errors = append(mErr.Errors, err)
}
if t.LogConfig != nil && ephemeralDisk != nil {
logUsage := (t.LogConfig.MaxFiles * t.LogConfig.MaxFileSizeMB)
if ephemeralDisk.SizeMB <= logUsage {
mErr.Errors = append(mErr.Errors,
fmt.Errorf("log storage (%d MB) must be less than requested disk capacity (%d MB)",
logUsage, ephemeralDisk.SizeMB))
}
}
for idx, artifact := range t.Artifacts {
if err := artifact.Validate(); err != nil {
outer := fmt.Errorf("Artifact %d validation failed: %v", idx+1, err)
mErr.Errors = append(mErr.Errors, outer)
}
}
if t.Vault != nil {
if err := t.Vault.Validate(); err != nil {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Vault validation failed: %v", err))
}
}
destinations := make(map[string]int, len(t.Templates))
for idx, tmpl := range t.Templates {
if err := tmpl.Validate(); err != nil {
outer := fmt.Errorf("Template %d validation failed: %s", idx+1, err)
mErr.Errors = append(mErr.Errors, outer)
}
if other, ok := destinations[tmpl.DestPath]; ok {
outer := fmt.Errorf("Template %d has same destination as %d", idx+1, other)
mErr.Errors = append(mErr.Errors, outer)
} else {
destinations[tmpl.DestPath] = idx + 1
}
}
// Validate the dispatch payload block if there
if t.DispatchPayload != nil {
if err := t.DispatchPayload.Validate(); err != nil {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Dispatch Payload validation failed: %v", err))
}
}
// Validate the Lifecycle block if there
if t.Lifecycle != nil {
if err := t.Lifecycle.Validate(); err != nil {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Lifecycle validation failed: %v", err))
}
}
// Validation for TaskKind field which is used for Consul Connect integration
if t.Kind.IsConnectProxy() {
// This task is a Connect proxy so it should not have service stanzas
if len(t.Services) > 0 {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Connect proxy task must not have a service stanza"))
}
if t.Leader {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Connect proxy task must not have leader set"))
}
// Ensure the proxy task has a corresponding service entry
serviceErr := ValidateConnectProxyService(t.Kind.Value(), tgServices)
if serviceErr != nil {
mErr.Errors = append(mErr.Errors, serviceErr)
}
}
// Validation for volumes
for idx, vm := range t.VolumeMounts {
if !MountPropagationModeIsValid(vm.PropagationMode) {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Volume Mount (%d) has an invalid propagation mode: \"%s\"", idx, vm.PropagationMode))
}
}
// Validate CSI Plugin Config
if t.CSIPluginConfig != nil {
if t.CSIPluginConfig.ID == "" {
mErr.Errors = append(mErr.Errors, fmt.Errorf("CSIPluginConfig must have a non-empty PluginID"))
}
if !CSIPluginTypeIsValid(t.CSIPluginConfig.Type) {
mErr.Errors = append(mErr.Errors, fmt.Errorf("CSIPluginConfig PluginType must be one of 'node', 'controller', or 'monolith', got: \"%s\"", t.CSIPluginConfig.Type))
}
// TODO: Investigate validation of the PluginMountDir. Not much we can do apart from check IsAbs until after we understand its execution environment though :(
}
return mErr.ErrorOrNil()
}
// validateServices takes a task and validates the services within it are valid
// and reference ports that exist.
func validateServices(t *Task) error {
var mErr multierror.Error
// Ensure that services don't ask for nonexistent ports and their names are
// unique.
servicePorts := make(map[string]map[string]struct{})
addServicePort := func(label, service string) {
if _, ok := servicePorts[label]; !ok {
servicePorts[label] = map[string]struct{}{}
}
servicePorts[label][service] = struct{}{}
}
knownServices := make(map[string]struct{})
for i, service := range t.Services {
if err := service.Validate(); err != nil {
outer := fmt.Errorf("service[%d] %+q validation failed: %s", i, service.Name, err)
mErr.Errors = append(mErr.Errors, outer)
}
if service.AddressMode == AddressModeAlloc {
mErr.Errors = append(mErr.Errors, fmt.Errorf("service %q cannot use address_mode=\"alloc\", only services defined in a \"group\" block can use this mode", service.Name))
}
// Ensure that services with the same name are not being registered for
// the same port
if _, ok := knownServices[service.Name+service.PortLabel]; ok {
mErr.Errors = append(mErr.Errors, fmt.Errorf("service %q is duplicate", service.Name))
}
knownServices[service.Name+service.PortLabel] = struct{}{}
if service.PortLabel != "" {
if service.AddressMode == "driver" {
// Numeric port labels are valid for address_mode=driver
_, err := strconv.Atoi(service.PortLabel)
if err != nil {
// Not a numeric port label, add it to list to check
addServicePort(service.PortLabel, service.Name)
}
} else {
addServicePort(service.PortLabel, service.Name)
}
}
// Ensure that check names are unique and have valid ports
knownChecks := make(map[string]struct{})
for _, check := range service.Checks {
if _, ok := knownChecks[check.Name]; ok {
mErr.Errors = append(mErr.Errors, fmt.Errorf("check %q is duplicate", check.Name))
}
knownChecks[check.Name] = struct{}{}
if check.AddressMode == AddressModeAlloc {
mErr.Errors = append(mErr.Errors, fmt.Errorf("check %q cannot use address_mode=\"alloc\", only checks defined in a \"group\" service block can use this mode", service.Name))
}
if !check.RequiresPort() {
// No need to continue validating check if it doesn't need a port
continue
}
effectivePort := check.PortLabel
if effectivePort == "" {
// Inherits from service
effectivePort = service.PortLabel
}
if effectivePort == "" {
mErr.Errors = append(mErr.Errors, fmt.Errorf("check %q is missing a port", check.Name))
continue
}
isNumeric := false
portNumber, err := strconv.Atoi(effectivePort)
if err == nil {
isNumeric = true
}
// Numeric ports are fine for address_mode = "driver"
if check.AddressMode == "driver" && isNumeric {
if portNumber <= 0 {
mErr.Errors = append(mErr.Errors, fmt.Errorf("check %q has invalid numeric port %d", check.Name, portNumber))
}
continue
}
if isNumeric {
mErr.Errors = append(mErr.Errors, fmt.Errorf(`check %q cannot use a numeric port %d without setting address_mode="driver"`, check.Name, portNumber))
continue
}
// PortLabel must exist, report errors by its parent service
addServicePort(effectivePort, service.Name)
}
}
// Get the set of port labels.
portLabels := make(map[string]struct{})
if t.Resources != nil {
for _, network := range t.Resources.Networks {
ports := network.PortLabels()
for portLabel := range ports {
portLabels[portLabel] = struct{}{}
}
}
}
// Iterate over a sorted list of keys to make error listings stable
keys := make([]string, 0, len(servicePorts))
for p := range servicePorts {
keys = append(keys, p)
}
sort.Strings(keys)
// Ensure all ports referenced in services exist.
for _, servicePort := range keys {
services := servicePorts[servicePort]
_, ok := portLabels[servicePort]
if !ok {
names := make([]string, 0, len(services))
for name := range services {
names = append(names, name)
}
// Keep order deterministic
sort.Strings(names)
joined := strings.Join(names, ", ")
err := fmt.Errorf("port label %q referenced by services %v does not exist", servicePort, joined)
mErr.Errors = append(mErr.Errors, err)
}
}
// Ensure address mode is valid
return mErr.ErrorOrNil()
}
func (t *Task) Warnings() error {
var mErr multierror.Error
// Validate the resources
if t.Resources != nil && t.Resources.IOPS != 0 {
mErr.Errors = append(mErr.Errors, fmt.Errorf("IOPS has been deprecated as of Nomad 0.9.0. Please remove IOPS from resource stanza."))
}
for idx, tmpl := range t.Templates {
if err := tmpl.Warnings(); err != nil {
err = multierror.Prefix(err, fmt.Sprintf("Template[%d]", idx))
mErr.Errors = append(mErr.Errors, err)
}
}
return mErr.ErrorOrNil()
}
// TaskKind identifies the special kinds of tasks using the following format:
// '<kind_name>(:<identifier>)`. The TaskKind can optionally include an identifier that
// is opaque to the Task. This identifier can be used to relate the task to some
// other entity based on the kind.
//
// For example, a task may have the TaskKind of `connect-proxy:service` where
// 'connect-proxy' is the kind name and 'service' is the identifier that relates the
// task to the service name of which it is a connect proxy for.
type TaskKind string
func NewTaskKind(name, identifier string) TaskKind {
return TaskKind(fmt.Sprintf("%s:%s", name, identifier))
}
// Name returns the kind name portion of the TaskKind
func (k TaskKind) Name() string {
return strings.Split(string(k), ":")[0]
}
// Value returns the identifier of the TaskKind or an empty string if it doesn't
// include one.
func (k TaskKind) Value() string {
if s := strings.SplitN(string(k), ":", 2); len(s) > 1 {
return s[1]
}
return ""
}
func (k TaskKind) hasPrefix(prefix string) bool {
return strings.HasPrefix(string(k), prefix+":") && len(k) > len(prefix)+1
}
// IsConnectProxy returns true if the TaskKind is connect-proxy.
func (k TaskKind) IsConnectProxy() bool {
return k.hasPrefix(ConnectProxyPrefix)
}
// IsConnectNative returns true if the TaskKind is connect-native.
func (k TaskKind) IsConnectNative() bool {
return k.hasPrefix(ConnectNativePrefix)
}
func (k TaskKind) IsConnectIngress() bool {
return k.hasPrefix(ConnectIngressPrefix)
}
func (k TaskKind) IsAnyConnectGateway() bool {
switch {
case k.IsConnectIngress():
return true
default:
return false
}
}
const (
// ConnectProxyPrefix is the prefix used for fields referencing a Consul Connect
// Proxy
ConnectProxyPrefix = "connect-proxy"
// ConnectNativePrefix is the prefix used for fields referencing a Connect
// Native Task
ConnectNativePrefix = "connect-native"
// ConnectIngressPrefix is the prefix used for fields referencing a Consul
// Connect Ingress Gateway Proxy.
ConnectIngressPrefix = "connect-ingress"
// ConnectTerminatingPrefix is the prefix used for fields referencing a Consul
// Connect Terminating Gateway Proxy.
//
// Not yet supported.
// ConnectTerminatingPrefix = "connect-terminating"
// ConnectMeshPrefix is the prefix used for fields referencing a Consul Connect
// Mesh Gateway Proxy.
//
// Not yet supported.
// ConnectMeshPrefix = "connect-mesh"
)
// ValidateConnectProxyService checks that the service that is being
// proxied by this task exists in the task group and contains
// valid Connect config.
func ValidateConnectProxyService(serviceName string, tgServices []*Service) error {
found := false
names := make([]string, 0, len(tgServices))
for _, svc := range tgServices {
if svc.Connect == nil || svc.Connect.SidecarService == nil {
continue
}
if svc.Name == serviceName {
found = true
break
}
// Build up list of mismatched Connect service names for error
// reporting.
names = append(names, svc.Name)
}
if !found {
if len(names) == 0 {
return fmt.Errorf("No Connect services in task group with Connect proxy (%q)", serviceName)
} else {
return fmt.Errorf("Connect proxy service name (%q) not found in Connect services from task group: %s", serviceName, names)
}
}
return nil
}
const (
// TemplateChangeModeNoop marks that no action should be taken if the
// template is re-rendered
TemplateChangeModeNoop = "noop"
// TemplateChangeModeSignal marks that the task should be signaled if the
// template is re-rendered
TemplateChangeModeSignal = "signal"
// TemplateChangeModeRestart marks that the task should be restarted if the
// template is re-rendered
TemplateChangeModeRestart = "restart"
)
var (
// TemplateChangeModeInvalidError is the error for when an invalid change
// mode is given
TemplateChangeModeInvalidError = errors.New("Invalid change mode. Must be one of the following: noop, signal, restart")
)
// Template represents a template configuration to be rendered for a given task
type Template struct {
// SourcePath is the path to the template to be rendered
SourcePath string
// DestPath is the path to where the template should be rendered
DestPath string
// EmbeddedTmpl store the raw template. This is useful for smaller templates
// where they are embedded in the job file rather than sent as an artifact
EmbeddedTmpl string
// ChangeMode indicates what should be done if the template is re-rendered
ChangeMode string
// ChangeSignal is the signal that should be sent if the change mode
// requires it.
ChangeSignal string
// Splay is used to avoid coordinated restarts of processes by applying a
// random wait between 0 and the given splay value before signalling the
// application of a change
Splay time.Duration
// Perms is the permission the file should be written out with.
Perms string
// LeftDelim and RightDelim are optional configurations to control what
// delimiter is utilized when parsing the template.
LeftDelim string
RightDelim string
// Envvars enables exposing the template as environment variables
// instead of as a file. The template must be of the form:
//
// VAR_NAME_1={{ key service/my-key }}
// VAR_NAME_2=raw string and {{ env "attr.kernel.name" }}
//
// Lines will be split on the initial "=" with the first part being the
// key name and the second part the value.
// Empty lines and lines starting with # will be ignored, but to avoid
// escaping issues #s within lines will not be treated as comments.
Envvars bool
// VaultGrace is the grace duration between lease renewal and reacquiring a
// secret. If the lease of a secret is less than the grace, a new secret is
// acquired.
// COMPAT(0.12) VaultGrace has been ignored by Vault since Vault v0.5.
VaultGrace time.Duration
}
// DefaultTemplate returns a default template.
func DefaultTemplate() *Template {
return &Template{
ChangeMode: TemplateChangeModeRestart,
Splay: 5 * time.Second,
Perms: "0644",
}
}
func (t *Template) Copy() *Template {
if t == nil {
return nil
}
copy := new(Template)
*copy = *t
return copy
}
func (t *Template) Canonicalize() {
if t.ChangeSignal != "" {
t.ChangeSignal = strings.ToUpper(t.ChangeSignal)
}
}
func (t *Template) Validate() error {
var mErr multierror.Error
// Verify we have something to render
if t.SourcePath == "" && t.EmbeddedTmpl == "" {
multierror.Append(&mErr, fmt.Errorf("Must specify a source path or have an embedded template"))
}
// Verify we can render somewhere
if t.DestPath == "" {
multierror.Append(&mErr, fmt.Errorf("Must specify a destination for the template"))
}
// Verify the destination doesn't escape
escaped, err := PathEscapesAllocDir("task", t.DestPath)
if err != nil {
mErr.Errors = append(mErr.Errors, fmt.Errorf("invalid destination path: %v", err))
} else if escaped {
mErr.Errors = append(mErr.Errors, fmt.Errorf("destination escapes allocation directory"))
}
// Verify a proper change mode
switch t.ChangeMode {
case TemplateChangeModeNoop, TemplateChangeModeRestart:
case TemplateChangeModeSignal:
if t.ChangeSignal == "" {
multierror.Append(&mErr, fmt.Errorf("Must specify signal value when change mode is signal"))
}
if t.Envvars {
multierror.Append(&mErr, fmt.Errorf("cannot use signals with env var templates"))
}
default:
multierror.Append(&mErr, TemplateChangeModeInvalidError)
}
// Verify the splay is positive
if t.Splay < 0 {
multierror.Append(&mErr, fmt.Errorf("Must specify positive splay value"))
}
// Verify the permissions
if t.Perms != "" {
if _, err := strconv.ParseUint(t.Perms, 8, 12); err != nil {
multierror.Append(&mErr, fmt.Errorf("Failed to parse %q as octal: %v", t.Perms, err))
}
}
return mErr.ErrorOrNil()
}
func (t *Template) Warnings() error {
var mErr multierror.Error
// Deprecation notice for vault_grace
if t.VaultGrace != 0 {
mErr.Errors = append(mErr.Errors, fmt.Errorf("VaultGrace has been deprecated as of Nomad 0.11 and ignored since Vault 0.5. Please remove VaultGrace / vault_grace from template stanza."))
}
return mErr.ErrorOrNil()
}
// AllocState records a single event that changes the state of the whole allocation
type AllocStateField uint8
const (
AllocStateFieldClientStatus AllocStateField = iota
)
type AllocState struct {
Field AllocStateField
Value string
Time time.Time
}
// Set of possible states for a task.
const (
TaskStatePending = "pending" // The task is waiting to be run.
TaskStateRunning = "running" // The task is currently running.
TaskStateDead = "dead" // Terminal state of task.
)
// TaskState tracks the current state of a task and events that caused state
// transitions.
type TaskState struct {
// The current state of the task.
State string
// Failed marks a task as having failed
Failed bool
// Restarts is the number of times the task has restarted
Restarts uint64
// LastRestart is the time the task last restarted. It is updated each time the
// task restarts
LastRestart time.Time
// StartedAt is the time the task is started. It is updated each time the
// task starts
StartedAt time.Time
// FinishedAt is the time at which the task transitioned to dead and will
// not be started again.
FinishedAt time.Time
// Series of task events that transition the state of the task.
Events []*TaskEvent
}
// NewTaskState returns a TaskState initialized in the Pending state.
func NewTaskState() *TaskState {
return &TaskState{
State: TaskStatePending,
}
}
// Canonicalize ensures the TaskState has a State set. It should default to
// Pending.
func (ts *TaskState) Canonicalize() {
if ts.State == "" {
ts.State = TaskStatePending
}
}
func (ts *TaskState) Copy() *TaskState {
if ts == nil {
return nil
}
copy := new(TaskState)
*copy = *ts
if ts.Events != nil {
copy.Events = make([]*TaskEvent, len(ts.Events))
for i, e := range ts.Events {
copy.Events[i] = e.Copy()
}
}
return copy
}
// Successful returns whether a task finished successfully. This doesn't really
// have meaning on a non-batch allocation because a service and system
// allocation should not finish.
func (ts *TaskState) Successful() bool {
return ts.State == TaskStateDead && !ts.Failed
}
const (
// TaskSetupFailure indicates that the task could not be started due to a
// a setup failure.
TaskSetupFailure = "Setup Failure"
// TaskDriveFailure indicates that the task could not be started due to a
// failure in the driver. TaskDriverFailure is considered Recoverable.
TaskDriverFailure = "Driver Failure"
// TaskReceived signals that the task has been pulled by the client at the
// given timestamp.
TaskReceived = "Received"
// TaskFailedValidation indicates the task was invalid and as such was not run.
// TaskFailedValidation is not considered Recoverable.
TaskFailedValidation = "Failed Validation"
// TaskStarted signals that the task was started and its timestamp can be
// used to determine the running length of the task.
TaskStarted = "Started"
// TaskTerminated indicates that the task was started and exited.
TaskTerminated = "Terminated"
// TaskKilling indicates a kill signal has been sent to the task.
TaskKilling = "Killing"
// TaskKilled indicates a user has killed the task.
TaskKilled = "Killed"
// TaskRestarting indicates that task terminated and is being restarted.
TaskRestarting = "Restarting"
// TaskNotRestarting indicates that the task has failed and is not being
// restarted because it has exceeded its restart policy.
TaskNotRestarting = "Not Restarting"
// TaskRestartSignal indicates that the task has been signalled to be
// restarted
TaskRestartSignal = "Restart Signaled"
// TaskSignaling indicates that the task is being signalled.
TaskSignaling = "Signaling"
// TaskDownloadingArtifacts means the task is downloading the artifacts
// specified in the task.
TaskDownloadingArtifacts = "Downloading Artifacts"
// TaskArtifactDownloadFailed indicates that downloading the artifacts
// failed.
TaskArtifactDownloadFailed = "Failed Artifact Download"
// TaskBuildingTaskDir indicates that the task directory/chroot is being
// built.
TaskBuildingTaskDir = "Building Task Directory"
// TaskSetup indicates the task runner is setting up the task environment
TaskSetup = "Task Setup"
// TaskDiskExceeded indicates that one of the tasks in a taskgroup has
// exceeded the requested disk resources.
TaskDiskExceeded = "Disk Resources Exceeded"
// TaskSiblingFailed indicates that a sibling task in the task group has
// failed.
TaskSiblingFailed = "Sibling Task Failed"
// TaskDriverMessage is an informational event message emitted by
// drivers such as when they're performing a long running action like
// downloading an image.
TaskDriverMessage = "Driver"
// TaskLeaderDead indicates that the leader task within the has finished.
TaskLeaderDead = "Leader Task Dead"
// TaskMainDead indicates that the main tasks have dead
TaskMainDead = "Main Tasks Dead"
// TaskHookFailed indicates that one of the hooks for a task failed.
TaskHookFailed = "Task hook failed"
// TaskRestoreFailed indicates Nomad was unable to reattach to a
// restored task.
TaskRestoreFailed = "Failed Restoring Task"
// TaskPluginUnhealthy indicates that a plugin managed by Nomad became unhealthy
TaskPluginUnhealthy = "Plugin became unhealthy"
// TaskPluginHealthy indicates that a plugin managed by Nomad became healthy
TaskPluginHealthy = "Plugin became healthy"
)
// TaskEvent is an event that effects the state of a task and contains meta-data
// appropriate to the events type.
type TaskEvent struct {
Type string
Time int64 // Unix Nanosecond timestamp
Message string // A possible message explaining the termination of the task.
// DisplayMessage is a human friendly message about the event
DisplayMessage string
// Details is a map with annotated info about the event
Details map[string]string
// DEPRECATION NOTICE: The following fields are deprecated and will be removed
// in a future release. Field values are available in the Details map.
// FailsTask marks whether this event fails the task.
// Deprecated, use Details["fails_task"] to access this.
FailsTask bool
// Restart fields.
// Deprecated, use Details["restart_reason"] to access this.
RestartReason string
// Setup Failure fields.
// Deprecated, use Details["setup_error"] to access this.
SetupError string
// Driver Failure fields.
// Deprecated, use Details["driver_error"] to access this.
DriverError string // A driver error occurred while starting the task.
// Task Terminated Fields.
// Deprecated, use Details["exit_code"] to access this.
ExitCode int // The exit code of the task.
// Deprecated, use Details["signal"] to access this.
Signal int // The signal that terminated the task.
// Killing fields
// Deprecated, use Details["kill_timeout"] to access this.
KillTimeout time.Duration
// Task Killed Fields.
// Deprecated, use Details["kill_error"] to access this.
KillError string // Error killing the task.
// KillReason is the reason the task was killed
// Deprecated, use Details["kill_reason"] to access this.
KillReason string
// TaskRestarting fields.
// Deprecated, use Details["start_delay"] to access this.
StartDelay int64 // The sleep period before restarting the task in unix nanoseconds.
// Artifact Download fields
// Deprecated, use Details["download_error"] to access this.
DownloadError string // Error downloading artifacts
// Validation fields
// Deprecated, use Details["validation_error"] to access this.
ValidationError string // Validation error
// The maximum allowed task disk size.
// Deprecated, use Details["disk_limit"] to access this.
DiskLimit int64
// Name of the sibling task that caused termination of the task that
// the TaskEvent refers to.
// Deprecated, use Details["failed_sibling"] to access this.
FailedSibling string
// VaultError is the error from token renewal
// Deprecated, use Details["vault_renewal_error"] to access this.
VaultError string
// TaskSignalReason indicates the reason the task is being signalled.
// Deprecated, use Details["task_signal_reason"] to access this.
TaskSignalReason string
// TaskSignal is the signal that was sent to the task
// Deprecated, use Details["task_signal"] to access this.
TaskSignal string
// DriverMessage indicates a driver action being taken.
// Deprecated, use Details["driver_message"] to access this.
DriverMessage string
// GenericSource is the source of a message.
// Deprecated, is redundant with event type.
GenericSource string
}
func (event *TaskEvent) PopulateEventDisplayMessage() {
// Build up the description based on the event type.
if event == nil { //TODO(preetha) needs investigation alloc_runner's Run method sends a nil event when sigterming nomad. Why?
return
}
if event.DisplayMessage != "" {
return
}
var desc string
switch event.Type {
case TaskSetup:
desc = event.Message
case TaskStarted:
desc = "Task started by client"
case TaskReceived:
desc = "Task received by client"
case TaskFailedValidation:
if event.ValidationError != "" {
desc = event.ValidationError
} else {
desc = "Validation of task failed"
}
case TaskSetupFailure:
if event.SetupError != "" {
desc = event.SetupError
} else {
desc = "Task setup failed"
}
case TaskDriverFailure:
if event.DriverError != "" {
desc = event.DriverError
} else {
desc = "Failed to start task"
}
case TaskDownloadingArtifacts:
desc = "Client is downloading artifacts"
case TaskArtifactDownloadFailed:
if event.DownloadError != "" {
desc = event.DownloadError
} else {
desc = "Failed to download artifacts"
}
case TaskKilling:
if event.KillReason != "" {
desc = event.KillReason
} else if event.KillTimeout != 0 {
desc = fmt.Sprintf("Sent interrupt. Waiting %v before force killing", event.KillTimeout)
} else {
desc = "Sent interrupt"
}
case TaskKilled:
if event.KillError != "" {
desc = event.KillError
} else {
desc = "Task successfully killed"
}
case TaskTerminated:
var parts []string
parts = append(parts, fmt.Sprintf("Exit Code: %d", event.ExitCode))
if event.Signal != 0 {
parts = append(parts, fmt.Sprintf("Signal: %d", event.Signal))
}
if event.Message != "" {
parts = append(parts, fmt.Sprintf("Exit Message: %q", event.Message))
}
desc = strings.Join(parts, ", ")
case TaskRestarting:
in := fmt.Sprintf("Task restarting in %v", time.Duration(event.StartDelay))
if event.RestartReason != "" && event.RestartReason != ReasonWithinPolicy {
desc = fmt.Sprintf("%s - %s", event.RestartReason, in)
} else {
desc = in
}
case TaskNotRestarting:
if event.RestartReason != "" {
desc = event.RestartReason
} else {
desc = "Task exceeded restart policy"
}
case TaskSiblingFailed:
if event.FailedSibling != "" {
desc = fmt.Sprintf("Task's sibling %q failed", event.FailedSibling)
} else {
desc = "Task's sibling failed"
}
case TaskSignaling:
sig := event.TaskSignal
reason := event.TaskSignalReason
if sig == "" && reason == "" {
desc = "Task being sent a signal"
} else if sig == "" {
desc = reason
} else if reason == "" {
desc = fmt.Sprintf("Task being sent signal %v", sig)
} else {
desc = fmt.Sprintf("Task being sent signal %v: %v", sig, reason)
}
case TaskRestartSignal:
if event.RestartReason != "" {
desc = event.RestartReason
} else {
desc = "Task signaled to restart"
}
case TaskDriverMessage:
desc = event.DriverMessage
case TaskLeaderDead:
desc = "Leader Task in Group dead"
case TaskMainDead:
desc = "Main tasks in the group died"
default:
desc = event.Message
}
event.DisplayMessage = desc
}
func (te *TaskEvent) GoString() string {
return fmt.Sprintf("%v - %v", te.Time, te.Type)
}
// SetDisplayMessage sets the display message of TaskEvent
func (te *TaskEvent) SetDisplayMessage(msg string) *TaskEvent {
te.DisplayMessage = msg
return te
}
// SetMessage sets the message of TaskEvent
func (te *TaskEvent) SetMessage(msg string) *TaskEvent {
te.Message = msg
te.Details["message"] = msg
return te
}
func (te *TaskEvent) Copy() *TaskEvent {
if te == nil {
return nil
}
copy := new(TaskEvent)
*copy = *te
return copy
}
func NewTaskEvent(event string) *TaskEvent {
return &TaskEvent{
Type: event,
Time: time.Now().UnixNano(),
Details: make(map[string]string),
}
}
// SetSetupError is used to store an error that occurred while setting up the
// task
func (e *TaskEvent) SetSetupError(err error) *TaskEvent {
if err != nil {
e.SetupError = err.Error()
e.Details["setup_error"] = err.Error()
}
return e
}
func (e *TaskEvent) SetFailsTask() *TaskEvent {
e.FailsTask = true
e.Details["fails_task"] = "true"
return e
}
func (e *TaskEvent) SetDriverError(err error) *TaskEvent {
if err != nil {
e.DriverError = err.Error()
e.Details["driver_error"] = err.Error()
}
return e
}
func (e *TaskEvent) SetExitCode(c int) *TaskEvent {
e.ExitCode = c
e.Details["exit_code"] = fmt.Sprintf("%d", c)
return e
}
func (e *TaskEvent) SetSignal(s int) *TaskEvent {
e.Signal = s
e.Details["signal"] = fmt.Sprintf("%d", s)
return e
}
func (e *TaskEvent) SetSignalText(s string) *TaskEvent {
e.Details["signal"] = s
return e
}
func (e *TaskEvent) SetExitMessage(err error) *TaskEvent {
if err != nil {
e.Message = err.Error()
e.Details["exit_message"] = err.Error()
}
return e
}
func (e *TaskEvent) SetKillError(err error) *TaskEvent {
if err != nil {
e.KillError = err.Error()
e.Details["kill_error"] = err.Error()
}
return e
}
func (e *TaskEvent) SetKillReason(r string) *TaskEvent {
e.KillReason = r
e.Details["kill_reason"] = r
return e
}
func (e *TaskEvent) SetRestartDelay(delay time.Duration) *TaskEvent {
e.StartDelay = int64(delay)
e.Details["start_delay"] = fmt.Sprintf("%d", delay)
return e
}
func (e *TaskEvent) SetRestartReason(reason string) *TaskEvent {
e.RestartReason = reason
e.Details["restart_reason"] = reason
return e
}
func (e *TaskEvent) SetTaskSignalReason(r string) *TaskEvent {
e.TaskSignalReason = r
e.Details["task_signal_reason"] = r
return e
}
func (e *TaskEvent) SetTaskSignal(s os.Signal) *TaskEvent {
e.TaskSignal = s.String()
e.Details["task_signal"] = s.String()
return e
}
func (e *TaskEvent) SetDownloadError(err error) *TaskEvent {
if err != nil {
e.DownloadError = err.Error()
e.Details["download_error"] = err.Error()
}
return e
}
func (e *TaskEvent) SetValidationError(err error) *TaskEvent {
if err != nil {
e.ValidationError = err.Error()
e.Details["validation_error"] = err.Error()
}
return e
}
func (e *TaskEvent) SetKillTimeout(timeout time.Duration) *TaskEvent {
e.KillTimeout = timeout
e.Details["kill_timeout"] = timeout.String()
return e
}
func (e *TaskEvent) SetDiskLimit(limit int64) *TaskEvent {
e.DiskLimit = limit
e.Details["disk_limit"] = fmt.Sprintf("%d", limit)
return e
}
func (e *TaskEvent) SetFailedSibling(sibling string) *TaskEvent {
e.FailedSibling = sibling
e.Details["failed_sibling"] = sibling
return e
}
func (e *TaskEvent) SetVaultRenewalError(err error) *TaskEvent {
if err != nil {
e.VaultError = err.Error()
e.Details["vault_renewal_error"] = err.Error()
}
return e
}
func (e *TaskEvent) SetDriverMessage(m string) *TaskEvent {
e.DriverMessage = m
e.Details["driver_message"] = m
return e
}
func (e *TaskEvent) SetOOMKilled(oom bool) *TaskEvent {
e.Details["oom_killed"] = strconv.FormatBool(oom)
return e
}
// TaskArtifact is an artifact to download before running the task.
type TaskArtifact struct {
// GetterSource is the source to download an artifact using go-getter
GetterSource string
// GetterOptions are options to use when downloading the artifact using
// go-getter.
GetterOptions map[string]string
// GetterMode is the go-getter.ClientMode for fetching resources.
// Defaults to "any" but can be set to "file" or "dir".
GetterMode string
// RelativeDest is the download destination given relative to the task's
// directory.
RelativeDest string
}
func (ta *TaskArtifact) Copy() *TaskArtifact {
if ta == nil {
return nil
}
nta := new(TaskArtifact)
*nta = *ta
nta.GetterOptions = helper.CopyMapStringString(ta.GetterOptions)
return nta
}
func (ta *TaskArtifact) GoString() string {
return fmt.Sprintf("%+v", ta)
}
// Hash creates a unique identifier for a TaskArtifact as the same GetterSource
// may be specified multiple times with different destinations.
func (ta *TaskArtifact) Hash() string {
hash, err := blake2b.New256(nil)
if err != nil {
panic(err)
}
hash.Write([]byte(ta.GetterSource))
// Must iterate over keys in a consistent order
keys := make([]string, 0, len(ta.GetterOptions))
for k := range ta.GetterOptions {
keys = append(keys, k)
}
sort.Strings(keys)
for _, k := range keys {
hash.Write([]byte(k))
hash.Write([]byte(ta.GetterOptions[k]))
}
hash.Write([]byte(ta.GetterMode))
hash.Write([]byte(ta.RelativeDest))
return base64.RawStdEncoding.EncodeToString(hash.Sum(nil))
}
// PathEscapesAllocDir returns if the given path escapes the allocation
// directory.
//
// The prefix is to joined to the path (e.g. "task/local"), and this function
// checks if path escapes the alloc dir, NOT the prefix directory within the alloc dir.
// With prefix="task/local", it will return false for "../secret", but
// true for "../../../../../../root" path; only the latter escapes the alloc dir
func PathEscapesAllocDir(prefix, path string) (bool, error) {
// Verify the destination doesn't escape the tasks directory
alloc, err := filepath.Abs(filepath.Join("/", "alloc-dir/", "alloc-id/"))
if err != nil {
return false, err
}
abs, err := filepath.Abs(filepath.Join(alloc, prefix, path))
if err != nil {
return false, err
}
rel, err := filepath.Rel(alloc, abs)
if err != nil {
return false, err
}
return strings.HasPrefix(rel, ".."), nil
}
func (ta *TaskArtifact) Validate() error {
// Verify the source
var mErr multierror.Error
if ta.GetterSource == "" {
mErr.Errors = append(mErr.Errors, fmt.Errorf("source must be specified"))
}
switch ta.GetterMode {
case "":
// Default to any
ta.GetterMode = GetterModeAny
case GetterModeAny, GetterModeFile, GetterModeDir:
// Ok
default:
mErr.Errors = append(mErr.Errors, fmt.Errorf("invalid artifact mode %q; must be one of: %s, %s, %s",
ta.GetterMode, GetterModeAny, GetterModeFile, GetterModeDir))
}
escaped, err := PathEscapesAllocDir("task", ta.RelativeDest)
if err != nil {
mErr.Errors = append(mErr.Errors, fmt.Errorf("invalid destination path: %v", err))
} else if escaped {
mErr.Errors = append(mErr.Errors, fmt.Errorf("destination escapes allocation directory"))
}
if err := ta.validateChecksum(); err != nil {
mErr.Errors = append(mErr.Errors, err)
}
return mErr.ErrorOrNil()
}
func (ta *TaskArtifact) validateChecksum() error {
check, ok := ta.GetterOptions["checksum"]
if !ok {
return nil
}
// Job struct validation occurs before interpolation resolution can be effective.
// Skip checking if checksum contain variable reference, and artifacts fetching will
// eventually fail, if checksum is indeed invalid.
if args.ContainsEnv(check) {
return nil
}
check = strings.TrimSpace(check)
if check == "" {
return fmt.Errorf("checksum value cannot be empty")
}
parts := strings.Split(check, ":")
if l := len(parts); l != 2 {
return fmt.Errorf(`checksum must be given as "type:value"; got %q`, check)
}
checksumVal := parts[1]
checksumBytes, err := hex.DecodeString(checksumVal)
if err != nil {
return fmt.Errorf("invalid checksum: %v", err)
}
checksumType := parts[0]
expectedLength := 0
switch checksumType {
case "md5":
expectedLength = md5.Size
case "sha1":
expectedLength = sha1.Size
case "sha256":
expectedLength = sha256.Size
case "sha512":
expectedLength = sha512.Size
default:
return fmt.Errorf("unsupported checksum type: %s", checksumType)
}
if len(checksumBytes) != expectedLength {
return fmt.Errorf("invalid %s checksum: %v", checksumType, checksumVal)
}
return nil
}
const (
ConstraintDistinctProperty = "distinct_property"
ConstraintDistinctHosts = "distinct_hosts"
ConstraintRegex = "regexp"
ConstraintVersion = "version"
ConstraintSemver = "semver"
ConstraintSetContains = "set_contains"
ConstraintSetContainsAll = "set_contains_all"
ConstraintSetContainsAny = "set_contains_any"
ConstraintAttributeIsSet = "is_set"
ConstraintAttributeIsNotSet = "is_not_set"
)
// Constraints are used to restrict placement options.
type Constraint struct {
LTarget string // Left-hand target
RTarget string // Right-hand target
Operand string // Constraint operand (<=, <, =, !=, >, >=), contains, near
str string // Memoized string
}
// Equal checks if two constraints are equal
func (c *Constraint) Equals(o *Constraint) bool {
return c == o ||
c.LTarget == o.LTarget &&
c.RTarget == o.RTarget &&
c.Operand == o.Operand
}
func (c *Constraint) Equal(o *Constraint) bool {
return c.Equals(o)
}
func (c *Constraint) Copy() *Constraint {
if c == nil {
return nil
}
nc := new(Constraint)
*nc = *c
return nc
}
func (c *Constraint) String() string {
if c.str != "" {
return c.str
}
c.str = fmt.Sprintf("%s %s %s", c.LTarget, c.Operand, c.RTarget)
return c.str
}
func (c *Constraint) Validate() error {
var mErr multierror.Error
if c.Operand == "" {
mErr.Errors = append(mErr.Errors, errors.New("Missing constraint operand"))
}
// requireLtarget specifies whether the constraint requires an LTarget to be
// provided.
requireLtarget := true
// Perform additional validation based on operand
switch c.Operand {
case ConstraintDistinctHosts:
requireLtarget = false
case ConstraintSetContainsAll, ConstraintSetContainsAny, ConstraintSetContains:
if c.RTarget == "" {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Set contains constraint requires an RTarget"))
}
case ConstraintRegex:
if _, err := regexp.Compile(c.RTarget); err != nil {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Regular expression failed to compile: %v", err))
}
case ConstraintVersion:
if _, err := version.NewConstraint(c.RTarget); err != nil {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Version constraint is invalid: %v", err))
}
case ConstraintSemver:
if _, err := semver.NewConstraint(c.RTarget); err != nil {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Semver constraint is invalid: %v", err))
}
case ConstraintDistinctProperty:
// If a count is set, make sure it is convertible to a uint64
if c.RTarget != "" {
count, err := strconv.ParseUint(c.RTarget, 10, 64)
if err != nil {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Failed to convert RTarget %q to uint64: %v", c.RTarget, err))
} else if count < 1 {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Distinct Property must have an allowed count of 1 or greater: %d < 1", count))
}
}
case ConstraintAttributeIsSet, ConstraintAttributeIsNotSet:
if c.RTarget != "" {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Operator %q does not support an RTarget", c.Operand))
}
case "=", "==", "is", "!=", "not", "<", "<=", ">", ">=":
if c.RTarget == "" {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Operator %q requires an RTarget", c.Operand))
}
default:
mErr.Errors = append(mErr.Errors, fmt.Errorf("Unknown constraint type %q", c.Operand))
}
// Ensure we have an LTarget for the constraints that need one
if requireLtarget && c.LTarget == "" {
mErr.Errors = append(mErr.Errors, fmt.Errorf("No LTarget provided but is required by constraint"))
}
return mErr.ErrorOrNil()
}
type Constraints []*Constraint
// Equals compares Constraints as a set
func (xs *Constraints) Equals(ys *Constraints) bool {
if xs == ys {
return true
}
if xs == nil || ys == nil {
return false
}
if len(*xs) != len(*ys) {
return false
}
SETEQUALS:
for _, x := range *xs {
for _, y := range *ys {
if x.Equals(y) {
continue SETEQUALS
}
}
return false
}
return true
}
// Affinity is used to score placement options based on a weight
type Affinity struct {
LTarget string // Left-hand target
RTarget string // Right-hand target
Operand string // Affinity operand (<=, <, =, !=, >, >=), set_contains_all, set_contains_any
Weight int8 // Weight applied to nodes that match the affinity. Can be negative
str string // Memoized string
}
// Equal checks if two affinities are equal
func (a *Affinity) Equals(o *Affinity) bool {
return a == o ||
a.LTarget == o.LTarget &&
a.RTarget == o.RTarget &&
a.Operand == o.Operand &&
a.Weight == o.Weight
}
func (a *Affinity) Equal(o *Affinity) bool {
return a.Equals(o)
}
func (a *Affinity) Copy() *Affinity {
if a == nil {
return nil
}
na := new(Affinity)
*na = *a
return na
}
func (a *Affinity) String() string {
if a.str != "" {
return a.str
}
a.str = fmt.Sprintf("%s %s %s %v", a.LTarget, a.Operand, a.RTarget, a.Weight)
return a.str
}
func (a *Affinity) Validate() error {
var mErr multierror.Error
if a.Operand == "" {
mErr.Errors = append(mErr.Errors, errors.New("Missing affinity operand"))
}
// Perform additional validation based on operand
switch a.Operand {
case ConstraintSetContainsAll, ConstraintSetContainsAny, ConstraintSetContains:
if a.RTarget == "" {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Set contains operators require an RTarget"))
}
case ConstraintRegex:
if _, err := regexp.Compile(a.RTarget); err != nil {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Regular expression failed to compile: %v", err))
}
case ConstraintVersion:
if _, err := version.NewConstraint(a.RTarget); err != nil {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Version affinity is invalid: %v", err))
}
case ConstraintSemver:
if _, err := semver.NewConstraint(a.RTarget); err != nil {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Semver affinity is invalid: %v", err))
}
case "=", "==", "is", "!=", "not", "<", "<=", ">", ">=":
if a.RTarget == "" {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Operator %q requires an RTarget", a.Operand))
}
default:
mErr.Errors = append(mErr.Errors, fmt.Errorf("Unknown affinity operator %q", a.Operand))
}
// Ensure we have an LTarget
if a.LTarget == "" {
mErr.Errors = append(mErr.Errors, fmt.Errorf("No LTarget provided but is required"))
}
// Ensure that weight is between -100 and 100, and not zero
if a.Weight == 0 {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Affinity weight cannot be zero"))
}
if a.Weight > 100 || a.Weight < -100 {
mErr.Errors = append(mErr.Errors, fmt.Errorf("Affinity weight must be within the range [-100,100]"))
}
return mErr.ErrorOrNil()
}
// Spread is used to specify desired distribution of allocations according to weight
type Spread struct {
// Attribute is the node attribute used as the spread criteria
Attribute string
// Weight is the relative weight of this spread, useful when there are multiple
// spread and affinities
Weight int8
// SpreadTarget is used to describe desired percentages for each attribute value
SpreadTarget []*SpreadTarget
// Memoized string representation
str string
}
type Affinities []*Affinity
// Equals compares Affinities as a set
func (xs *Affinities) Equals(ys *Affinities) bool {
if xs == ys {
return true
}
if xs == nil || ys == nil {
return false
}
if len(*xs) != len(*ys) {
return false
}
SETEQUALS:
for _, x := range *xs {
for _, y := range *ys {
if x.Equals(y) {
continue SETEQUALS
}
}
return false
}
return true
}
func (s *Spread) Copy() *Spread {
if s == nil {
return nil
}
ns := new(Spread)
*ns = *s
ns.SpreadTarget = CopySliceSpreadTarget(s.SpreadTarget)
return ns
}
func (s *Spread) String() string {
if s.str != "" {
return s.str
}
s.str = fmt.Sprintf("%s %s %v", s.Attribute, s.SpreadTarget, s.Weight)
return s.str
}
func (s *Spread) Validate() error {
var mErr multierror.Error
if s.Attribute == "" {
mErr.Errors = append(mErr.Errors, errors.New("Missing spread attribute"))
}
if s.Weight <= 0 || s.Weight > 100 {
mErr.Errors = append(mErr.Errors, errors.New("Spread stanza must have a positive weight from 0 to 100"))
}
seen := make(map[string]struct{})
sumPercent := uint32(0)
for _, target := range s.SpreadTarget {
// Make sure there are no duplicates
_, ok := seen[target.Value]
if !ok {
seen[target.Value] = struct{}{}
} else {
mErr.Errors = append(mErr.Errors, errors.New(fmt.Sprintf("Spread target value %q already defined", target.Value)))
}
if target.Percent < 0 || target.Percent > 100 {
mErr.Errors = append(mErr.Errors, errors.New(fmt.Sprintf("Spread target percentage for value %q must be between 0 and 100", target.Value)))
}
sumPercent += uint32(target.Percent)
}
if sumPercent > 100 {
mErr.Errors = append(mErr.Errors, errors.New(fmt.Sprintf("Sum of spread target percentages must not be greater than 100%%; got %d%%", sumPercent)))
}
return mErr.ErrorOrNil()
}
// SpreadTarget is used to specify desired percentages for each attribute value
type SpreadTarget struct {
// Value is a single attribute value, like "dc1"
Value string
// Percent is the desired percentage of allocs
Percent uint8
// Memoized string representation
str string
}
func (s *SpreadTarget) Copy() *SpreadTarget {
if s == nil {
return nil
}
ns := new(SpreadTarget)
*ns = *s
return ns
}
func (s *SpreadTarget) String() string {
if s.str != "" {
return s.str
}
s.str = fmt.Sprintf("%q %v%%", s.Value, s.Percent)
return s.str
}
// EphemeralDisk is an ephemeral disk object
type EphemeralDisk struct {
// Sticky indicates whether the allocation is sticky to a node
Sticky bool
// SizeMB is the size of the local disk
SizeMB int
// Migrate determines if Nomad client should migrate the allocation dir for
// sticky allocations
Migrate bool
}
// DefaultEphemeralDisk returns a EphemeralDisk with default configurations
func DefaultEphemeralDisk() *EphemeralDisk {
return &EphemeralDisk{
SizeMB: 300,
}
}
// Validate validates EphemeralDisk
func (d *EphemeralDisk) Validate() error {
if d.SizeMB < 10 {
return fmt.Errorf("minimum DiskMB value is 10; got %d", d.SizeMB)
}
return nil
}
// Copy copies the EphemeralDisk struct and returns a new one
func (d *EphemeralDisk) Copy() *EphemeralDisk {
ld := new(EphemeralDisk)
*ld = *d
return ld
}
var (
// VaultUnrecoverableError matches unrecoverable errors returned by a Vault
// server
VaultUnrecoverableError = regexp.MustCompile(`Code:\s+40(0|3|4)`)
)
const (
// VaultChangeModeNoop takes no action when a new token is retrieved.
VaultChangeModeNoop = "noop"
// VaultChangeModeSignal signals the task when a new token is retrieved.
VaultChangeModeSignal = "signal"
// VaultChangeModeRestart restarts the task when a new token is retrieved.
VaultChangeModeRestart = "restart"
)
// Vault stores the set of permissions a task needs access to from Vault.
type Vault struct {
// Policies is the set of policies that the task needs access to
Policies []string
// Namespace is the vault namespace that should be used.
Namespace string
// Env marks whether the Vault Token should be exposed as an environment
// variable
Env bool
// ChangeMode is used to configure the task's behavior when the Vault
// token changes because the original token could not be renewed in time.
ChangeMode string
// ChangeSignal is the signal sent to the task when a new token is
// retrieved. This is only valid when using the signal change mode.
ChangeSignal string
}
func DefaultVaultBlock() *Vault {
return &Vault{
Env: true,
ChangeMode: VaultChangeModeRestart,
}
}
// Copy returns a copy of this Vault block.
func (v *Vault) Copy() *Vault {
if v == nil {
return nil
}
nv := new(Vault)
*nv = *v
return nv
}
func (v *Vault) Canonicalize() {
if v.ChangeSignal != "" {
v.ChangeSignal = strings.ToUpper(v.ChangeSignal)
}
}
// Validate returns if the Vault block is valid.
func (v *Vault) Validate() error {
if v == nil {
return nil
}
var mErr multierror.Error
if len(v.Policies) == 0 {
multierror.Append(&mErr, fmt.Errorf("Policy list cannot be empty"))
}
for _, p := range v.Policies {
if p == "root" {
multierror.Append(&mErr, fmt.Errorf("Can not specify \"root\" policy"))
}
}
switch v.ChangeMode {
case VaultChangeModeSignal:
if v.ChangeSignal == "" {
multierror.Append(&mErr, fmt.Errorf("Signal must be specified when using change mode %q", VaultChangeModeSignal))
}
case VaultChangeModeNoop, VaultChangeModeRestart:
default:
multierror.Append(&mErr, fmt.Errorf("Unknown change mode %q", v.ChangeMode))
}
return mErr.ErrorOrNil()
}
const (
// DeploymentStatuses are the various states a deployment can be be in
DeploymentStatusRunning = "running"
DeploymentStatusPaused = "paused"
DeploymentStatusFailed = "failed"
DeploymentStatusSuccessful = "successful"
DeploymentStatusCancelled = "cancelled"
DeploymentStatusPending = "pending"
DeploymentStatusBlocked = "blocked"
DeploymentStatusUnblocking = "unblocking"
// TODO Statuses and Descriptions do not match 1:1 and we sometimes use the Description as a status flag
// DeploymentStatusDescriptions are the various descriptions of the states a
// deployment can be in.
DeploymentStatusDescriptionRunning = "Deployment is running"
DeploymentStatusDescriptionRunningNeedsPromotion = "Deployment is running but requires manual promotion"
DeploymentStatusDescriptionRunningAutoPromotion = "Deployment is running pending automatic promotion"
DeploymentStatusDescriptionPaused = "Deployment is paused"
DeploymentStatusDescriptionSuccessful = "Deployment completed successfully"
DeploymentStatusDescriptionStoppedJob = "Cancelled because job is stopped"
DeploymentStatusDescriptionNewerJob = "Cancelled due to newer version of job"
DeploymentStatusDescriptionFailedAllocations = "Failed due to unhealthy allocations"
DeploymentStatusDescriptionProgressDeadline = "Failed due to progress deadline"
DeploymentStatusDescriptionFailedByUser = "Deployment marked as failed"
// used only in multiregion deployments
DeploymentStatusDescriptionFailedByPeer = "Failed because of an error in peer region"
DeploymentStatusDescriptionBlocked = "Deployment is complete but waiting for peer region"
DeploymentStatusDescriptionUnblocking = "Deployment is unblocking remaining regions"
DeploymentStatusDescriptionPendingForPeer = "Deployment is pending, waiting for peer region"
)
// DeploymentStatusDescriptionRollback is used to get the status description of
// a deployment when rolling back to an older job.
func DeploymentStatusDescriptionRollback(baseDescription string, jobVersion uint64) string {
return fmt.Sprintf("%s - rolling back to job version %d", baseDescription, jobVersion)
}
// DeploymentStatusDescriptionRollbackNoop is used to get the status description of
// a deployment when rolling back is not possible because it has the same specification
func DeploymentStatusDescriptionRollbackNoop(baseDescription string, jobVersion uint64) string {
return fmt.Sprintf("%s - not rolling back to stable job version %d as current job has same specification", baseDescription, jobVersion)
}
// DeploymentStatusDescriptionNoRollbackTarget is used to get the status description of
// a deployment when there is no target to rollback to but autorevert is desired.
func DeploymentStatusDescriptionNoRollbackTarget(baseDescription string) string {
return fmt.Sprintf("%s - no stable job version to auto revert to", baseDescription)
}
// Deployment is the object that represents a job deployment which is used to
// transition a job between versions.
type Deployment struct {
// ID is a generated UUID for the deployment
ID string
// Namespace is the namespace the deployment is created in
Namespace string
// JobID is the job the deployment is created for
JobID string
// JobVersion is the version of the job at which the deployment is tracking
JobVersion uint64
// JobModifyIndex is the ModifyIndex of the job which the deployment is
// tracking.
JobModifyIndex uint64
// JobSpecModifyIndex is the JobModifyIndex of the job which the
// deployment is tracking.
JobSpecModifyIndex uint64
// JobCreateIndex is the create index of the job which the deployment is
// tracking. It is needed so that if the job gets stopped and reran we can
// present the correct list of deployments for the job and not old ones.
JobCreateIndex uint64
// Multiregion specifies if deployment is part of multiregion deployment
IsMultiregion bool
// TaskGroups is the set of task groups effected by the deployment and their
// current deployment status.
TaskGroups map[string]*DeploymentState
// The status of the deployment
Status string
// StatusDescription allows a human readable description of the deployment
// status.
StatusDescription string
CreateIndex uint64
ModifyIndex uint64
}
// NewDeployment creates a new deployment given the job.
func NewDeployment(job *Job) *Deployment {
return &Deployment{
ID: uuid.Generate(),
Namespace: job.Namespace,
JobID: job.ID,
JobVersion: job.Version,
JobModifyIndex: job.ModifyIndex,
JobSpecModifyIndex: job.JobModifyIndex,
JobCreateIndex: job.CreateIndex,
IsMultiregion: job.IsMultiregion(),
Status: DeploymentStatusRunning,
StatusDescription: DeploymentStatusDescriptionRunning,
TaskGroups: make(map[string]*DeploymentState, len(job.TaskGroups)),
}
}
func (d *Deployment) Copy() *Deployment {
if d == nil {
return nil
}
c := &Deployment{}
*c = *d
c.TaskGroups = nil
if l := len(d.TaskGroups); d.TaskGroups != nil {
c.TaskGroups = make(map[string]*DeploymentState, l)
for tg, s := range d.TaskGroups {
c.TaskGroups[tg] = s.Copy()
}
}
return c
}
// Active returns whether the deployment is active or terminal.
func (d *Deployment) Active() bool {
switch d.Status {
case DeploymentStatusRunning, DeploymentStatusPaused, DeploymentStatusBlocked, DeploymentStatusUnblocking, DeploymentStatusPending:
return true
default:
return false
}
}
// GetID is a helper for getting the ID when the object may be nil
func (d *Deployment) GetID() string {
if d == nil {
return ""
}
return d.ID
}
// HasPlacedCanaries returns whether the deployment has placed canaries
func (d *Deployment) HasPlacedCanaries() bool {
if d == nil || len(d.TaskGroups) == 0 {
return false
}
for _, group := range d.TaskGroups {
if len(group.PlacedCanaries) != 0 {
return true
}
}
return false
}
// RequiresPromotion returns whether the deployment requires promotion to
// continue
func (d *Deployment) RequiresPromotion() bool {
if d == nil || len(d.TaskGroups) == 0 || d.Status != DeploymentStatusRunning {
return false
}
for _, group := range d.TaskGroups {
if group.DesiredCanaries > 0 && !group.Promoted {
return true
}
}
return false
}
// HasAutoPromote determines if all taskgroups are marked auto_promote
func (d *Deployment) HasAutoPromote() bool {
if d == nil || len(d.TaskGroups) == 0 || d.Status != DeploymentStatusRunning {
return false
}
for _, group := range d.TaskGroups {
if !group.AutoPromote {
return false
}
}
return true
}
func (d *Deployment) GoString() string {
base := fmt.Sprintf("Deployment ID %q for job %q has status %q (%v):", d.ID, d.JobID, d.Status, d.StatusDescription)
for group, state := range d.TaskGroups {
base += fmt.Sprintf("\nTask Group %q has state:\n%#v", group, state)
}
return base
}
// DeploymentState tracks the state of a deployment for a given task group.
type DeploymentState struct {
// AutoRevert marks whether the task group has indicated the job should be
// reverted on failure
AutoRevert bool
// AutoPromote marks promotion triggered automatically by healthy canaries
// copied from TaskGroup UpdateStrategy in scheduler.reconcile
AutoPromote bool
// ProgressDeadline is the deadline by which an allocation must transition
// to healthy before the deployment is considered failed.
ProgressDeadline time.Duration
// RequireProgressBy is the time by which an allocation must transition
// to healthy before the deployment is considered failed.
RequireProgressBy time.Time
// Promoted marks whether the canaries have been promoted
Promoted bool
// PlacedCanaries is the set of placed canary allocations
PlacedCanaries []string
// DesiredCanaries is the number of canaries that should be created.
DesiredCanaries int
// DesiredTotal is the total number of allocations that should be created as
// part of the deployment.
DesiredTotal int
// PlacedAllocs is the number of allocations that have been placed
PlacedAllocs int
// HealthyAllocs is the number of allocations that have been marked healthy.
HealthyAllocs int
// UnhealthyAllocs are allocations that have been marked as unhealthy.
UnhealthyAllocs int
}
func (d *DeploymentState) GoString() string {
base := fmt.Sprintf("\tDesired Total: %d", d.DesiredTotal)
base += fmt.Sprintf("\n\tDesired Canaries: %d", d.DesiredCanaries)
base += fmt.Sprintf("\n\tPlaced Canaries: %#v", d.PlacedCanaries)
base += fmt.Sprintf("\n\tPromoted: %v", d.Promoted)
base += fmt.Sprintf("\n\tPlaced: %d", d.PlacedAllocs)
base += fmt.Sprintf("\n\tHealthy: %d", d.HealthyAllocs)
base += fmt.Sprintf("\n\tUnhealthy: %d", d.UnhealthyAllocs)
base += fmt.Sprintf("\n\tAutoRevert: %v", d.AutoRevert)
base += fmt.Sprintf("\n\tAutoPromote: %v", d.AutoPromote)
return base
}
func (d *DeploymentState) Copy() *DeploymentState {
c := &DeploymentState{}
*c = *d
c.PlacedCanaries = helper.CopySliceString(d.PlacedCanaries)
return c
}
// DeploymentStatusUpdate is used to update the status of a given deployment
type DeploymentStatusUpdate struct {
// DeploymentID is the ID of the deployment to update
DeploymentID string
// Status is the new status of the deployment.
Status string
// StatusDescription is the new status description of the deployment.
StatusDescription string
}
// RescheduleTracker encapsulates previous reschedule events
type RescheduleTracker struct {
Events []*RescheduleEvent
}
func (rt *RescheduleTracker) Copy() *RescheduleTracker {
if rt == nil {
return nil
}
nt := &RescheduleTracker{}
*nt = *rt
rescheduleEvents := make([]*RescheduleEvent, 0, len(rt.Events))
for _, tracker := range rt.Events {
rescheduleEvents = append(rescheduleEvents, tracker.Copy())
}
nt.Events = rescheduleEvents
return nt
}
// RescheduleEvent is used to keep track of previous attempts at rescheduling an allocation
type RescheduleEvent struct {
// RescheduleTime is the timestamp of a reschedule attempt
RescheduleTime int64
// PrevAllocID is the ID of the previous allocation being restarted
PrevAllocID string
// PrevNodeID is the node ID of the previous allocation
PrevNodeID string
// Delay is the reschedule delay associated with the attempt
Delay time.Duration
}
func NewRescheduleEvent(rescheduleTime int64, prevAllocID string, prevNodeID string, delay time.Duration) *RescheduleEvent {
return &RescheduleEvent{RescheduleTime: rescheduleTime,
PrevAllocID: prevAllocID,
PrevNodeID: prevNodeID,
Delay: delay}
}
func (re *RescheduleEvent) Copy() *RescheduleEvent {
if re == nil {
return nil
}
copy := new(RescheduleEvent)
*copy = *re
return copy
}
// DesiredTransition is used to mark an allocation as having a desired state
// transition. This information can be used by the scheduler to make the
// correct decision.
type DesiredTransition struct {
// Migrate is used to indicate that this allocation should be stopped and
// migrated to another node.
Migrate *bool
// Reschedule is used to indicate that this allocation is eligible to be
// rescheduled. Most allocations are automatically eligible for
// rescheduling, so this field is only required when an allocation is not
// automatically eligible. An example is an allocation that is part of a
// deployment.
Reschedule *bool
// ForceReschedule is used to indicate that this allocation must be rescheduled.
// This field is only used when operators want to force a placement even if
// a failed allocation is not eligible to be rescheduled
ForceReschedule *bool
}
// Merge merges the two desired transitions, preferring the values from the
// passed in object.
func (d *DesiredTransition) Merge(o *DesiredTransition) {
if o.Migrate != nil {
d.Migrate = o.Migrate
}
if o.Reschedule != nil {
d.Reschedule = o.Reschedule
}
if o.ForceReschedule != nil {
d.ForceReschedule = o.ForceReschedule
}
}
// ShouldMigrate returns whether the transition object dictates a migration.
func (d *DesiredTransition) ShouldMigrate() bool {
return d.Migrate != nil && *d.Migrate
}
// ShouldReschedule returns whether the transition object dictates a
// rescheduling.
func (d *DesiredTransition) ShouldReschedule() bool {
return d.Reschedule != nil && *d.Reschedule
}
// ShouldForceReschedule returns whether the transition object dictates a
// forced rescheduling.
func (d *DesiredTransition) ShouldForceReschedule() bool {
if d == nil {
return false
}
return d.ForceReschedule != nil && *d.ForceReschedule
}
const (
AllocDesiredStatusRun = "run" // Allocation should run
AllocDesiredStatusStop = "stop" // Allocation should stop
AllocDesiredStatusEvict = "evict" // Allocation should stop, and was evicted
)
const (
AllocClientStatusPending = "pending"
AllocClientStatusRunning = "running"
AllocClientStatusComplete = "complete"
AllocClientStatusFailed = "failed"
AllocClientStatusLost = "lost"
)
// Allocation is used to allocate the placement of a task group to a node.
type Allocation struct {
// msgpack omit empty fields during serialization
_struct bool `codec:",omitempty"` // nolint: structcheck
// ID of the allocation (UUID)
ID string
// Namespace is the namespace the allocation is created in
Namespace string
// ID of the evaluation that generated this allocation
EvalID string
// Name is a logical name of the allocation.
Name string
// NodeID is the node this is being placed on
NodeID string
// NodeName is the name of the node this is being placed on.
NodeName string
// Job is the parent job of the task group being allocated.
// This is copied at allocation time to avoid issues if the job
// definition is updated.
JobID string
Job *Job
// TaskGroup is the name of the task group that should be run
TaskGroup string
// COMPAT(0.11): Remove in 0.11
// Resources is the total set of resources allocated as part
// of this allocation of the task group. Dynamic ports will be set by
// the scheduler.
Resources *Resources
// SharedResources are the resources that are shared by all the tasks in an
// allocation
// Deprecated: use AllocatedResources.Shared instead.
// Keep field to allow us to handle upgrade paths from old versions
SharedResources *Resources
// TaskResources is the set of resources allocated to each
// task. These should sum to the total Resources. Dynamic ports will be
// set by the scheduler.
// Deprecated: use AllocatedResources.Tasks instead.
// Keep field to allow us to handle upgrade paths from old versions
TaskResources map[string]*Resources
// AllocatedResources is the total resources allocated for the task group.
AllocatedResources *AllocatedResources
// Metrics associated with this allocation
Metrics *AllocMetric
// Desired Status of the allocation on the client
DesiredStatus string
// DesiredStatusDescription is meant to provide more human useful information
DesiredDescription string
// DesiredTransition is used to indicate that a state transition
// is desired for a given reason.
DesiredTransition DesiredTransition
// Status of the allocation on the client
ClientStatus string
// ClientStatusDescription is meant to provide more human useful information
ClientDescription string
// TaskStates stores the state of each task,
TaskStates map[string]*TaskState
// AllocStates track meta data associated with changes to the state of the whole allocation, like becoming lost
AllocStates []*AllocState
// PreviousAllocation is the allocation that this allocation is replacing
PreviousAllocation string
// NextAllocation is the allocation that this allocation is being replaced by
NextAllocation string
// DeploymentID identifies an allocation as being created from a
// particular deployment
DeploymentID string
// DeploymentStatus captures the status of the allocation as part of the
// given deployment
DeploymentStatus *AllocDeploymentStatus
// RescheduleTrackers captures details of previous reschedule attempts of the allocation
RescheduleTracker *RescheduleTracker
// NetworkStatus captures networking details of an allocation known at runtime
NetworkStatus *AllocNetworkStatus
// FollowupEvalID captures a follow up evaluation created to handle a failed allocation
// that can be rescheduled in the future
FollowupEvalID string
// PreemptedAllocations captures IDs of any allocations that were preempted
// in order to place this allocation
PreemptedAllocations []string
// PreemptedByAllocation tracks the alloc ID of the allocation that caused this allocation
// to stop running because it got preempted
PreemptedByAllocation string
// Raft Indexes
CreateIndex uint64
ModifyIndex uint64
// AllocModifyIndex is not updated when the client updates allocations. This
// lets the client pull only the allocs updated by the server.
AllocModifyIndex uint64
// CreateTime is the time the allocation has finished scheduling and been
// verified by the plan applier.
CreateTime int64
// ModifyTime is the time the allocation was last updated.
ModifyTime int64
}
// Index returns the index of the allocation. If the allocation is from a task
// group with count greater than 1, there will be multiple allocations for it.
func (a *Allocation) Index() uint {
l := len(a.Name)
prefix := len(a.JobID) + len(a.TaskGroup) + 2
if l <= 3 || l <= prefix {
return uint(0)
}
strNum := a.Name[prefix : len(a.Name)-1]
num, _ := strconv.Atoi(strNum)
return uint(num)
}
// Copy provides a copy of the allocation and deep copies the job
func (a *Allocation) Copy() *Allocation {
return a.copyImpl(true)
}
// CopySkipJob provides a copy of the allocation but doesn't deep copy the job
func (a *Allocation) CopySkipJob() *Allocation {
return a.copyImpl(false)
}
// Canonicalize Allocation to ensure fields are initialized to the expectations
// of this version of Nomad. Should be called when restoring persisted
// Allocations or receiving Allocations from Nomad agents potentially on an
// older version of Nomad.
func (a *Allocation) Canonicalize() {
if a.AllocatedResources == nil && a.TaskResources != nil {
ar := AllocatedResources{}
tasks := make(map[string]*AllocatedTaskResources, len(a.TaskResources))
for name, tr := range a.TaskResources {
atr := AllocatedTaskResources{}
atr.Cpu.CpuShares = int64(tr.CPU)
atr.Memory.MemoryMB = int64(tr.MemoryMB)
atr.Networks = tr.Networks.Copy()
tasks[name] = &atr
}
ar.Tasks = tasks
if a.SharedResources != nil {
ar.Shared.DiskMB = int64(a.SharedResources.DiskMB)
ar.Shared.Networks = a.SharedResources.Networks.Copy()
}
a.AllocatedResources = &ar
}
a.Job.Canonicalize()
}
func (a *Allocation) copyImpl(job bool) *Allocation {
if a == nil {
return nil
}
na := new(Allocation)
*na = *a
if job {
na.Job = na.Job.Copy()
}
na.AllocatedResources = na.AllocatedResources.Copy()
na.Resources = na.Resources.Copy()
na.SharedResources = na.SharedResources.Copy()
if a.TaskResources != nil {
tr := make(map[string]*Resources, len(na.TaskResources))
for task, resource := range na.TaskResources {
tr[task] = resource.Copy()
}
na.TaskResources = tr
}
na.Metrics = na.Metrics.Copy()
na.DeploymentStatus = na.DeploymentStatus.Copy()
if a.TaskStates != nil {
ts := make(map[string]*TaskState, len(na.TaskStates))
for task, state := range na.TaskStates {
ts[task] = state.Copy()
}
na.TaskStates = ts
}
na.RescheduleTracker = a.RescheduleTracker.Copy()
na.PreemptedAllocations = helper.CopySliceString(a.PreemptedAllocations)
return na
}
// TerminalStatus returns if the desired or actual status is terminal and
// will no longer transition.
func (a *Allocation) TerminalStatus() bool {
// First check the desired state and if that isn't terminal, check client
// state.
return a.ServerTerminalStatus() || a.ClientTerminalStatus()
}
// ServerTerminalStatus returns true if the desired state of the allocation is terminal
func (a *Allocation) ServerTerminalStatus() bool {
switch a.DesiredStatus {
case AllocDesiredStatusStop, AllocDesiredStatusEvict:
return true
default:
return false
}
}
// ClientTerminalStatus returns if the client status is terminal and will no longer transition
func (a *Allocation) ClientTerminalStatus() bool {
switch a.ClientStatus {
case AllocClientStatusComplete, AllocClientStatusFailed, AllocClientStatusLost:
return true
default:
return false
}
}
// ShouldReschedule returns if the allocation is eligible to be rescheduled according
// to its status and ReschedulePolicy given its failure time
func (a *Allocation) ShouldReschedule(reschedulePolicy *ReschedulePolicy, failTime time.Time) bool {
// First check the desired state
switch a.DesiredStatus {
case AllocDesiredStatusStop, AllocDesiredStatusEvict:
return false
default:
}
switch a.ClientStatus {
case AllocClientStatusFailed:
return a.RescheduleEligible(reschedulePolicy, failTime)
default:
return false
}
}
// RescheduleEligible returns if the allocation is eligible to be rescheduled according
// to its ReschedulePolicy and the current state of its reschedule trackers
func (a *Allocation) RescheduleEligible(reschedulePolicy *ReschedulePolicy, failTime time.Time) bool {
if reschedulePolicy == nil {
return false
}
attempts := reschedulePolicy.Attempts
interval := reschedulePolicy.Interval
enabled := attempts > 0 || reschedulePolicy.Unlimited
if !enabled {
return false
}
if reschedulePolicy.Unlimited {
return true
}
// Early return true if there are no attempts yet and the number of allowed attempts is > 0
if (a.RescheduleTracker == nil || len(a.RescheduleTracker.Events) == 0) && attempts > 0 {
return true
}
attempted := 0
for j := len(a.RescheduleTracker.Events) - 1; j >= 0; j-- {
lastAttempt := a.RescheduleTracker.Events[j].RescheduleTime
timeDiff := failTime.UTC().UnixNano() - lastAttempt
if timeDiff < interval.Nanoseconds() {
attempted += 1
}
}
return attempted < attempts
}
// LastEventTime is the time of the last task event in the allocation.
// It is used to determine allocation failure time. If the FinishedAt field
// is not set, the alloc's modify time is used
func (a *Allocation) LastEventTime() time.Time {
var lastEventTime time.Time
if a.TaskStates != nil {
for _, s := range a.TaskStates {
if lastEventTime.IsZero() || s.FinishedAt.After(lastEventTime) {
lastEventTime = s.FinishedAt
}
}
}
if lastEventTime.IsZero() {
return time.Unix(0, a.ModifyTime).UTC()
}
return lastEventTime
}
// ReschedulePolicy returns the reschedule policy based on the task group
func (a *Allocation) ReschedulePolicy() *ReschedulePolicy {
tg := a.Job.LookupTaskGroup(a.TaskGroup)
if tg == nil {
return nil
}
return tg.ReschedulePolicy
}
// MigrateStrategy returns the migrate strategy based on the task group
func (a *Allocation) MigrateStrategy() *MigrateStrategy {
tg := a.Job.LookupTaskGroup(a.TaskGroup)
if tg == nil {
return nil
}
return tg.Migrate
}
// NextRescheduleTime returns a time on or after which the allocation is eligible to be rescheduled,
// and whether the next reschedule time is within policy's interval if the policy doesn't allow unlimited reschedules
func (a *Allocation) NextRescheduleTime() (time.Time, bool) {
failTime := a.LastEventTime()
reschedulePolicy := a.ReschedulePolicy()
if a.DesiredStatus == AllocDesiredStatusStop || a.ClientStatus != AllocClientStatusFailed || failTime.IsZero() || reschedulePolicy == nil {
return time.Time{}, false
}
nextDelay := a.NextDelay()
nextRescheduleTime := failTime.Add(nextDelay)
rescheduleEligible := reschedulePolicy.Unlimited || (reschedulePolicy.Attempts > 0 && a.RescheduleTracker == nil)
if reschedulePolicy.Attempts > 0 && a.RescheduleTracker != nil && a.RescheduleTracker.Events != nil {
// Check for eligibility based on the interval if max attempts is set
attempted := 0
for j := len(a.RescheduleTracker.Events) - 1; j >= 0; j-- {
lastAttempt := a.RescheduleTracker.Events[j].RescheduleTime
timeDiff := failTime.UTC().UnixNano() - lastAttempt
if timeDiff < reschedulePolicy.Interval.Nanoseconds() {
attempted += 1
}
}
rescheduleEligible = attempted < reschedulePolicy.Attempts && nextDelay < reschedulePolicy.Interval
}
return nextRescheduleTime, rescheduleEligible
}
// ShouldClientStop tests an alloc for StopAfterClientDisconnect configuration
func (a *Allocation) ShouldClientStop() bool {
tg := a.Job.LookupTaskGroup(a.TaskGroup)
if tg == nil ||
tg.StopAfterClientDisconnect == nil ||
*tg.StopAfterClientDisconnect == 0*time.Nanosecond {
return false
}
return true
}
// WaitClientStop uses the reschedule delay mechanism to block rescheduling until
// StopAfterClientDisconnect's block interval passes
func (a *Allocation) WaitClientStop() time.Time {
tg := a.Job.LookupTaskGroup(a.TaskGroup)
// An alloc can only be marked lost once, so use the first lost transition
var t time.Time
for _, s := range a.AllocStates {
if s.Field == AllocStateFieldClientStatus &&
s.Value == AllocClientStatusLost {
t = s.Time
break
}
}
// On the first pass, the alloc hasn't been marked lost yet, and so we start
// counting from now
if t.IsZero() {
t = time.Now().UTC()
}
// Find the max kill timeout
kill := DefaultKillTimeout
for _, t := range tg.Tasks {
if t.KillTimeout > kill {
kill = t.KillTimeout
}
}
return t.Add(*tg.StopAfterClientDisconnect + kill)
}
// NextDelay returns a duration after which the allocation can be rescheduled.
// It is calculated according to the delay function and previous reschedule attempts.
func (a *Allocation) NextDelay() time.Duration {
policy := a.ReschedulePolicy()
// Can be nil if the task group was updated to remove its reschedule policy
if policy == nil {
return 0
}
delayDur := policy.Delay
if a.RescheduleTracker == nil || a.RescheduleTracker.Events == nil || len(a.RescheduleTracker.Events) == 0 {
return delayDur
}
events := a.RescheduleTracker.Events
switch policy.DelayFunction {
case "exponential":
delayDur = a.RescheduleTracker.Events[len(a.RescheduleTracker.Events)-1].Delay * 2
case "fibonacci":
if len(events) >= 2 {
fibN1Delay := events[len(events)-1].Delay
fibN2Delay := events[len(events)-2].Delay
// Handle reset of delay ceiling which should cause
// a new series to start
if fibN2Delay == policy.MaxDelay && fibN1Delay == policy.Delay {
delayDur = fibN1Delay
} else {
delayDur = fibN1Delay + fibN2Delay
}
}
default:
return delayDur
}
if policy.MaxDelay > 0 && delayDur > policy.MaxDelay {
delayDur = policy.MaxDelay
// check if delay needs to be reset
lastRescheduleEvent := a.RescheduleTracker.Events[len(a.RescheduleTracker.Events)-1]
timeDiff := a.LastEventTime().UTC().UnixNano() - lastRescheduleEvent.RescheduleTime
if timeDiff > delayDur.Nanoseconds() {
delayDur = policy.Delay
}
}
return delayDur
}
// Terminated returns if the allocation is in a terminal state on a client.
func (a *Allocation) Terminated() bool {
if a.ClientStatus == AllocClientStatusFailed ||
a.ClientStatus == AllocClientStatusComplete ||
a.ClientStatus == AllocClientStatusLost {
return true
}
return false
}
// SetStopped updates the allocation in place to a DesiredStatus stop, with the ClientStatus
func (a *Allocation) SetStop(clientStatus, clientDesc string) {
a.DesiredStatus = AllocDesiredStatusStop
a.ClientStatus = clientStatus
a.ClientDescription = clientDesc
a.AppendState(AllocStateFieldClientStatus, clientStatus)
}
// AppendState creates and appends an AllocState entry recording the time of the state
// transition. Used to mark the transition to lost
func (a *Allocation) AppendState(field AllocStateField, value string) {
a.AllocStates = append(a.AllocStates, &AllocState{
Field: field,
Value: value,
Time: time.Now().UTC(),
})
}
// RanSuccessfully returns whether the client has ran the allocation and all
// tasks finished successfully. Critically this function returns whether the
// allocation has ran to completion and not just that the alloc has converged to
// its desired state. That is to say that a batch allocation must have finished
// with exit code 0 on all task groups. This doesn't really have meaning on a
// non-batch allocation because a service and system allocation should not
// finish.
func (a *Allocation) RanSuccessfully() bool {
// Handle the case the client hasn't started the allocation.
if len(a.TaskStates) == 0 {
return false
}
// Check to see if all the tasks finished successfully in the allocation
allSuccess := true
for _, state := range a.TaskStates {
allSuccess = allSuccess && state.Successful()
}
return allSuccess
}
// ShouldMigrate returns if the allocation needs data migration
func (a *Allocation) ShouldMigrate() bool {
if a.PreviousAllocation == "" {
return false
}
if a.DesiredStatus == AllocDesiredStatusStop || a.DesiredStatus == AllocDesiredStatusEvict {
return false
}
tg := a.Job.LookupTaskGroup(a.TaskGroup)
// if the task group is nil or the ephemeral disk block isn't present then
// we won't migrate
if tg == nil || tg.EphemeralDisk == nil {
return false
}
// We won't migrate any data is the user hasn't enabled migration or the
// disk is not marked as sticky
if !tg.EphemeralDisk.Migrate || !tg.EphemeralDisk.Sticky {
return false
}
return true
}
// SetEventDisplayMessage populates the display message if its not already set,
// a temporary fix to handle old allocations that don't have it.
// This method will be removed in a future release.
func (a *Allocation) SetEventDisplayMessages() {
setDisplayMsg(a.TaskStates)
}
// COMPAT(0.11): Remove in 0.11
// ComparableResources returns the resources on the allocation
// handling upgrade paths. After 0.11 calls to this should be replaced with:
// alloc.AllocatedResources.Comparable()
func (a *Allocation) ComparableResources() *ComparableResources {
// ALloc already has 0.9+ behavior
if a.AllocatedResources != nil {
return a.AllocatedResources.Comparable()
}
var resources *Resources
if a.Resources != nil {
resources = a.Resources
} else if a.TaskResources != nil {
resources = new(Resources)
resources.Add(a.SharedResources)
for _, taskResource := range a.TaskResources {
resources.Add(taskResource)
}
}
// Upgrade path
return &ComparableResources{
Flattened: AllocatedTaskResources{
Cpu: AllocatedCpuResources{
CpuShares: int64(resources.CPU),
},
Memory: AllocatedMemoryResources{
MemoryMB: int64(resources.MemoryMB),
},
Networks: resources.Networks,
},
Shared: AllocatedSharedResources{
DiskMB: int64(resources.DiskMB),
},
}
}
// LookupTask by name from the Allocation. Returns nil if the Job is not set, the
// TaskGroup does not exist, or the task name cannot be found.
func (a *Allocation) LookupTask(name string) *Task {
if a.Job == nil {
return nil
}
tg := a.Job.LookupTaskGroup(a.TaskGroup)
if tg == nil {
return nil
}
return tg.LookupTask(name)
}
// Stub returns a list stub for the allocation
func (a *Allocation) Stub(fields *AllocStubFields) *AllocListStub {
s := &AllocListStub{
ID: a.ID,
EvalID: a.EvalID,
Name: a.Name,
Namespace: a.Namespace,
NodeID: a.NodeID,
NodeName: a.NodeName,
JobID: a.JobID,
JobType: a.Job.Type,
JobVersion: a.Job.Version,
TaskGroup: a.TaskGroup,
DesiredStatus: a.DesiredStatus,
DesiredDescription: a.DesiredDescription,
ClientStatus: a.ClientStatus,
ClientDescription: a.ClientDescription,
DesiredTransition: a.DesiredTransition,
TaskStates: a.TaskStates,
DeploymentStatus: a.DeploymentStatus,
FollowupEvalID: a.FollowupEvalID,
RescheduleTracker: a.RescheduleTracker,
PreemptedAllocations: a.PreemptedAllocations,
PreemptedByAllocation: a.PreemptedByAllocation,
CreateIndex: a.CreateIndex,
ModifyIndex: a.ModifyIndex,
CreateTime: a.CreateTime,
ModifyTime: a.ModifyTime,
}
if fields != nil {
if fields.Resources {
s.AllocatedResources = a.AllocatedResources
}
if !fields.TaskStates {
s.TaskStates = nil
}
}
return s
}
// AllocationDiff converts an Allocation type to an AllocationDiff type
// If at any time, modification are made to AllocationDiff so that an
// Allocation can no longer be safely converted to AllocationDiff,
// this method should be changed accordingly.
func (a *Allocation) AllocationDiff() *AllocationDiff {
return (*AllocationDiff)(a)
}
// AllocationDiff is another named type for Allocation (to use the same fields),
// which is used to represent the delta for an Allocation. If you need a method
// defined on the al
type AllocationDiff Allocation
// AllocListStub is used to return a subset of alloc information
type AllocListStub struct {
ID string
EvalID string
Name string
Namespace string
NodeID string
NodeName string
JobID string
JobType string
JobVersion uint64
TaskGroup string
AllocatedResources *AllocatedResources `json:",omitempty"`
DesiredStatus string
DesiredDescription string
ClientStatus string
ClientDescription string
DesiredTransition DesiredTransition
TaskStates map[string]*TaskState
DeploymentStatus *AllocDeploymentStatus
FollowupEvalID string
RescheduleTracker *RescheduleTracker
PreemptedAllocations []string
PreemptedByAllocation string
CreateIndex uint64
ModifyIndex uint64
CreateTime int64
ModifyTime int64
}
// SetEventDisplayMessage populates the display message if its not already set,
// a temporary fix to handle old allocations that don't have it.
// This method will be removed in a future release.
func (a *AllocListStub) SetEventDisplayMessages() {
setDisplayMsg(a.TaskStates)
}
func setDisplayMsg(taskStates map[string]*TaskState) {
if taskStates != nil {
for _, taskState := range taskStates {
for _, event := range taskState.Events {
event.PopulateEventDisplayMessage()
}
}
}
}
// AllocStubFields defines which fields are included in the AllocListStub.
type AllocStubFields struct {
// Resources includes resource-related fields if true.
Resources bool
// TaskStates removes the TaskStates field if false (default is to
// include TaskStates).
TaskStates bool
}
func NewAllocStubFields() *AllocStubFields {
return &AllocStubFields{
// Maintain backward compatibility by retaining task states by
// default.
TaskStates: true,
}
}
// AllocMetric is used to track various metrics while attempting
// to make an allocation. These are used to debug a job, or to better
// understand the pressure within the system.
type AllocMetric struct {
// NodesEvaluated is the number of nodes that were evaluated
NodesEvaluated int
// NodesFiltered is the number of nodes filtered due to a constraint
NodesFiltered int
// NodesAvailable is the number of nodes available for evaluation per DC.
NodesAvailable map[string]int
// ClassFiltered is the number of nodes filtered by class
ClassFiltered map[string]int
// ConstraintFiltered is the number of failures caused by constraint
ConstraintFiltered map[string]int
// NodesExhausted is the number of nodes skipped due to being
// exhausted of at least one resource
NodesExhausted int
// ClassExhausted is the number of nodes exhausted by class
ClassExhausted map[string]int
// DimensionExhausted provides the count by dimension or reason
DimensionExhausted map[string]int
// QuotaExhausted provides the exhausted dimensions
QuotaExhausted []string
// Scores is the scores of the final few nodes remaining
// for placement. The top score is typically selected.
// Deprecated: Replaced by ScoreMetaData in Nomad 0.9
Scores map[string]float64
// ScoreMetaData is a slice of top scoring nodes displayed in the CLI
ScoreMetaData []*NodeScoreMeta
// nodeScoreMeta is used to keep scores for a single node id. It is cleared out after
// we receive normalized score during the last step of the scoring stack.
nodeScoreMeta *NodeScoreMeta
// topScores is used to maintain a heap of the top K nodes with
// the highest normalized score
topScores *kheap.ScoreHeap
// AllocationTime is a measure of how long the allocation
// attempt took. This can affect performance and SLAs.
AllocationTime time.Duration
// CoalescedFailures indicates the number of other
// allocations that were coalesced into this failed allocation.
// This is to prevent creating many failed allocations for a
// single task group.
CoalescedFailures int
}
func (a *AllocMetric) Copy() *AllocMetric {
if a == nil {
return nil
}
na := new(AllocMetric)
*na = *a
na.NodesAvailable = helper.CopyMapStringInt(na.NodesAvailable)
na.ClassFiltered = helper.CopyMapStringInt(na.ClassFiltered)
na.ConstraintFiltered = helper.CopyMapStringInt(na.ConstraintFiltered)
na.ClassExhausted = helper.CopyMapStringInt(na.ClassExhausted)
na.DimensionExhausted = helper.CopyMapStringInt(na.DimensionExhausted)
na.QuotaExhausted = helper.CopySliceString(na.QuotaExhausted)
na.Scores = helper.CopyMapStringFloat64(na.Scores)
na.ScoreMetaData = CopySliceNodeScoreMeta(na.ScoreMetaData)
return na
}
func (a *AllocMetric) EvaluateNode() {
a.NodesEvaluated += 1
}
func (a *AllocMetric) FilterNode(node *Node, constraint string) {
a.NodesFiltered += 1
if node != nil && node.NodeClass != "" {
if a.ClassFiltered == nil {
a.ClassFiltered = make(map[string]int)
}
a.ClassFiltered[node.NodeClass] += 1
}
if constraint != "" {
if a.ConstraintFiltered == nil {
a.ConstraintFiltered = make(map[string]int)
}
a.ConstraintFiltered[constraint] += 1
}
}
func (a *AllocMetric) ExhaustedNode(node *Node, dimension string) {
a.NodesExhausted += 1
if node != nil && node.NodeClass != "" {
if a.ClassExhausted == nil {
a.ClassExhausted = make(map[string]int)
}
a.ClassExhausted[node.NodeClass] += 1
}
if dimension != "" {
if a.DimensionExhausted == nil {
a.DimensionExhausted = make(map[string]int)
}
a.DimensionExhausted[dimension] += 1
}
}
func (a *AllocMetric) ExhaustQuota(dimensions []string) {
if a.QuotaExhausted == nil {
a.QuotaExhausted = make([]string, 0, len(dimensions))
}
a.QuotaExhausted = append(a.QuotaExhausted, dimensions...)
}
// ScoreNode is used to gather top K scoring nodes in a heap
func (a *AllocMetric) ScoreNode(node *Node, name string, score float64) {
// Create nodeScoreMeta lazily if its the first time or if its a new node
if a.nodeScoreMeta == nil || a.nodeScoreMeta.NodeID != node.ID {
a.nodeScoreMeta = &NodeScoreMeta{
NodeID: node.ID,
Scores: make(map[string]float64),
}
}
if name == NormScorerName {
a.nodeScoreMeta.NormScore = score
// Once we have the normalized score we can push to the heap
// that tracks top K by normalized score
// Create the heap if its not there already
if a.topScores == nil {
a.topScores = kheap.NewScoreHeap(MaxRetainedNodeScores)
}
heap.Push(a.topScores, a.nodeScoreMeta)
// Clear out this entry because its now in the heap
a.nodeScoreMeta = nil
} else {
a.nodeScoreMeta.Scores[name] = score
}
}
// PopulateScoreMetaData populates a map of scorer to scoring metadata
// The map is populated by popping elements from a heap of top K scores
// maintained per scorer
func (a *AllocMetric) PopulateScoreMetaData() {
if a.topScores == nil {
return
}
if a.ScoreMetaData == nil {
a.ScoreMetaData = make([]*NodeScoreMeta, a.topScores.Len())
}
heapItems := a.topScores.GetItemsReverse()
for i, item := range heapItems {
a.ScoreMetaData[i] = item.(*NodeScoreMeta)
}
}
// NodeScoreMeta captures scoring meta data derived from
// different scoring factors.
type NodeScoreMeta struct {
NodeID string
Scores map[string]float64
NormScore float64
}
func (s *NodeScoreMeta) Copy() *NodeScoreMeta {
if s == nil {
return nil
}
ns := new(NodeScoreMeta)
*ns = *s
return ns
}
func (s *NodeScoreMeta) String() string {
return fmt.Sprintf("%s %f %v", s.NodeID, s.NormScore, s.Scores)
}
func (s *NodeScoreMeta) Score() float64 {
return s.NormScore
}
func (s *NodeScoreMeta) Data() interface{} {
return s
}
// AllocNetworkStatus captures the status of an allocation's network during runtime.
// Depending on the network mode, an allocation's address may need to be known to other
// systems in Nomad such as service registration.
type AllocNetworkStatus struct {
InterfaceName string
Address string
DNS *DNSConfig
}
func (a *AllocNetworkStatus) Copy() *AllocNetworkStatus {
if a == nil {
return nil
}
return &AllocNetworkStatus{
InterfaceName: a.InterfaceName,
Address: a.Address,
DNS: a.DNS.Copy(),
}
}
// AllocDeploymentStatus captures the status of the allocation as part of the
// deployment. This can include things like if the allocation has been marked as
// healthy.
type AllocDeploymentStatus struct {
// Healthy marks whether the allocation has been marked healthy or unhealthy
// as part of a deployment. It can be unset if it has neither been marked
// healthy or unhealthy.
Healthy *bool
// Timestamp is the time at which the health status was set.
Timestamp time.Time
// Canary marks whether the allocation is a canary or not. A canary that has
// been promoted will have this field set to false.
Canary bool
// ModifyIndex is the raft index in which the deployment status was last
// changed.
ModifyIndex uint64
}
// HasHealth returns true if the allocation has its health set.
func (a *AllocDeploymentStatus) HasHealth() bool {
return a != nil && a.Healthy != nil
}
// IsHealthy returns if the allocation is marked as healthy as part of a
// deployment
func (a *AllocDeploymentStatus) IsHealthy() bool {
if a == nil {
return false
}
return a.Healthy != nil && *a.Healthy
}
// IsUnhealthy returns if the allocation is marked as unhealthy as part of a
// deployment
func (a *AllocDeploymentStatus) IsUnhealthy() bool {
if a == nil {
return false
}
return a.Healthy != nil && !*a.Healthy
}
// IsCanary returns if the allocation is marked as a canary
func (a *AllocDeploymentStatus) IsCanary() bool {
if a == nil {
return false
}
return a.Canary
}
func (a *AllocDeploymentStatus) Copy() *AllocDeploymentStatus {
if a == nil {
return nil
}
c := new(AllocDeploymentStatus)
*c = *a
if a.Healthy != nil {
c.Healthy = helper.BoolToPtr(*a.Healthy)
}
return c
}
const (
EvalStatusBlocked = "blocked"
EvalStatusPending = "pending"
EvalStatusComplete = "complete"
EvalStatusFailed = "failed"
EvalStatusCancelled = "canceled"
)
const (
EvalTriggerJobRegister = "job-register"
EvalTriggerJobDeregister = "job-deregister"
EvalTriggerPeriodicJob = "periodic-job"
EvalTriggerNodeDrain = "node-drain"
EvalTriggerNodeUpdate = "node-update"
EvalTriggerAllocStop = "alloc-stop"
EvalTriggerScheduled = "scheduled"
EvalTriggerRollingUpdate = "rolling-update"
EvalTriggerDeploymentWatcher = "deployment-watcher"
EvalTriggerFailedFollowUp = "failed-follow-up"
EvalTriggerMaxPlans = "max-plan-attempts"
EvalTriggerRetryFailedAlloc = "alloc-failure"
EvalTriggerQueuedAllocs = "queued-allocs"
EvalTriggerPreemption = "preemption"
EvalTriggerScaling = "job-scaling"
)
const (
// CoreJobEvalGC is used for the garbage collection of evaluations
// and allocations. We periodically scan evaluations in a terminal state,
// in which all the corresponding allocations are also terminal. We
// delete these out of the system to bound the state.
CoreJobEvalGC = "eval-gc"
// CoreJobNodeGC is used for the garbage collection of failed nodes.
// We periodically scan nodes in a terminal state, and if they have no
// corresponding allocations we delete these out of the system.
CoreJobNodeGC = "node-gc"
// CoreJobJobGC is used for the garbage collection of eligible jobs. We
// periodically scan garbage collectible jobs and check if both their
// evaluations and allocations are terminal. If so, we delete these out of
// the system.
CoreJobJobGC = "job-gc"
// CoreJobDeploymentGC is used for the garbage collection of eligible
// deployments. We periodically scan garbage collectible deployments and
// check if they are terminal. If so, we delete these out of the system.
CoreJobDeploymentGC = "deployment-gc"
// CoreJobCSIVolumeClaimGC is use for the garbage collection of CSI
// volume claims. We periodically scan volumes to see if no allocs are
// claiming them. If so, we unclaim the volume.
CoreJobCSIVolumeClaimGC = "csi-volume-claim-gc"
// CoreJobCSIPluginGC is use for the garbage collection of CSI plugins.
// We periodically scan plugins to see if they have no associated volumes
// or allocs running them. If so, we delete the plugin.
CoreJobCSIPluginGC = "csi-plugin-gc"
// CoreJobForceGC is used to force garbage collection of all GCable objects.
CoreJobForceGC = "force-gc"
)
// Evaluation is used anytime we need to apply business logic as a result
// of a change to our desired state (job specification) or the emergent state
// (registered nodes). When the inputs change, we need to "evaluate" them,
// potentially taking action (allocation of work) or doing nothing if the state
// of the world does not require it.
type Evaluation struct {
// msgpack omit empty fields during serialization
_struct bool `codec:",omitempty"` // nolint: structcheck
// ID is a randomly generated UUID used for this evaluation. This
// is assigned upon the creation of the evaluation.
ID string
// Namespace is the namespace the evaluation is created in
Namespace string
// Priority is used to control scheduling importance and if this job
// can preempt other jobs.
Priority int
// Type is used to control which schedulers are available to handle
// this evaluation.
Type string
// TriggeredBy is used to give some insight into why this Eval
// was created. (Job change, node failure, alloc failure, etc).
TriggeredBy string
// JobID is the job this evaluation is scoped to. Evaluations cannot
// be run in parallel for a given JobID, so we serialize on this.
JobID string
// JobModifyIndex is the modify index of the job at the time
// the evaluation was created
JobModifyIndex uint64
// NodeID is the node that was affected triggering the evaluation.
NodeID string
// NodeModifyIndex is the modify index of the node at the time
// the evaluation was created
NodeModifyIndex uint64
// DeploymentID is the ID of the deployment that triggered the evaluation.
DeploymentID string
// Status of the evaluation
Status string
// StatusDescription is meant to provide more human useful information
StatusDescription string
// Wait is a minimum wait time for running the eval. This is used to
// support a rolling upgrade in versions prior to 0.7.0
// Deprecated
Wait time.Duration
// WaitUntil is the time when this eval should be run. This is used to
// supported delayed rescheduling of failed allocations
WaitUntil time.Time
// NextEval is the evaluation ID for the eval created to do a followup.
// This is used to support rolling upgrades and failed-follow-up evals, where
// we need a chain of evaluations.
NextEval string
// PreviousEval is the evaluation ID for the eval creating this one to do a followup.
// This is used to support rolling upgrades and failed-follow-up evals, where
// we need a chain of evaluations.
PreviousEval string
// BlockedEval is the evaluation ID for a created blocked eval. A
// blocked eval will be created if all allocations could not be placed due
// to constraints or lacking resources.
BlockedEval string
// FailedTGAllocs are task groups which have allocations that could not be
// made, but the metrics are persisted so that the user can use the feedback
// to determine the cause.
FailedTGAllocs map[string]*AllocMetric
// ClassEligibility tracks computed node classes that have been explicitly
// marked as eligible or ineligible.
ClassEligibility map[string]bool
// QuotaLimitReached marks whether a quota limit was reached for the
// evaluation.
QuotaLimitReached string
// EscapedComputedClass marks whether the job has constraints that are not
// captured by computed node classes.
EscapedComputedClass bool
// AnnotatePlan triggers the scheduler to provide additional annotations
// during the evaluation. This should not be set during normal operations.
AnnotatePlan bool
// QueuedAllocations is the number of unplaced allocations at the time the
// evaluation was processed. The map is keyed by Task Group names.
QueuedAllocations map[string]int
// LeaderACL provides the ACL token to when issuing RPCs back to the
// leader. This will be a valid management token as long as the leader is
// active. This should not ever be exposed via the API.
LeaderACL string
// SnapshotIndex is the Raft index of the snapshot used to process the
// evaluation. The index will either be set when it has gone through the
// scheduler or if a blocked evaluation is being created. The index is set
// in this case so we can determine if an early unblocking is required since
// capacity has changed since the evaluation was created. This can result in
// the SnapshotIndex being less than the CreateIndex.
SnapshotIndex uint64
// Raft Indexes
CreateIndex uint64
ModifyIndex uint64
CreateTime int64
ModifyTime int64
}
// TerminalStatus returns if the current status is terminal and
// will no longer transition.
func (e *Evaluation) TerminalStatus() bool {
switch e.Status {
case EvalStatusComplete, EvalStatusFailed, EvalStatusCancelled:
return true
default:
return false
}
}
func (e *Evaluation) GoString() string {
return fmt.Sprintf("<Eval %q JobID: %q Namespace: %q>", e.ID, e.JobID, e.Namespace)
}
func (e *Evaluation) Copy() *Evaluation {
if e == nil {
return nil
}
ne := new(Evaluation)
*ne = *e
// Copy ClassEligibility
if e.ClassEligibility != nil {
classes := make(map[string]bool, len(e.ClassEligibility))
for class, elig := range e.ClassEligibility {
classes[class] = elig
}
ne.ClassEligibility = classes
}
// Copy FailedTGAllocs
if e.FailedTGAllocs != nil {
failedTGs := make(map[string]*AllocMetric, len(e.FailedTGAllocs))
for tg, metric := range e.FailedTGAllocs {
failedTGs[tg] = metric.Copy()
}
ne.FailedTGAllocs = failedTGs
}
// Copy queued allocations
if e.QueuedAllocations != nil {
queuedAllocations := make(map[string]int, len(e.QueuedAllocations))
for tg, num := range e.QueuedAllocations {
queuedAllocations[tg] = num
}
ne.QueuedAllocations = queuedAllocations
}
return ne
}
// ShouldEnqueue checks if a given evaluation should be enqueued into the
// eval_broker
func (e *Evaluation) ShouldEnqueue() bool {
switch e.Status {
case EvalStatusPending:
return true
case EvalStatusComplete, EvalStatusFailed, EvalStatusBlocked, EvalStatusCancelled:
return false
default:
panic(fmt.Sprintf("unhandled evaluation (%s) status %s", e.ID, e.Status))
}
}
// ShouldBlock checks if a given evaluation should be entered into the blocked
// eval tracker.
func (e *Evaluation) ShouldBlock() bool {
switch e.Status {
case EvalStatusBlocked:
return true
case EvalStatusComplete, EvalStatusFailed, EvalStatusPending, EvalStatusCancelled:
return false
default:
panic(fmt.Sprintf("unhandled evaluation (%s) status %s", e.ID, e.Status))
}
}
// MakePlan is used to make a plan from the given evaluation
// for a given Job
func (e *Evaluation) MakePlan(j *Job) *Plan {
p := &Plan{
EvalID: e.ID,
Priority: e.Priority,
Job: j,
NodeUpdate: make(map[string][]*Allocation),
NodeAllocation: make(map[string][]*Allocation),
NodePreemptions: make(map[string][]*Allocation),
}
if j != nil {
p.AllAtOnce = j.AllAtOnce
}
return p
}
// NextRollingEval creates an evaluation to followup this eval for rolling updates
func (e *Evaluation) NextRollingEval(wait time.Duration) *Evaluation {
now := time.Now().UTC().UnixNano()
return &Evaluation{
ID: uuid.Generate(),
Namespace: e.Namespace,
Priority: e.Priority,
Type: e.Type,
TriggeredBy: EvalTriggerRollingUpdate,
JobID: e.JobID,
JobModifyIndex: e.JobModifyIndex,
Status: EvalStatusPending,
Wait: wait,
PreviousEval: e.ID,
CreateTime: now,
ModifyTime: now,
}
}
// CreateBlockedEval creates a blocked evaluation to followup this eval to place any
// failed allocations. It takes the classes marked explicitly eligible or
// ineligible, whether the job has escaped computed node classes and whether the
// quota limit was reached.
func (e *Evaluation) CreateBlockedEval(classEligibility map[string]bool,
escaped bool, quotaReached string) *Evaluation {
now := time.Now().UTC().UnixNano()
return &Evaluation{
ID: uuid.Generate(),
Namespace: e.Namespace,
Priority: e.Priority,
Type: e.Type,
TriggeredBy: EvalTriggerQueuedAllocs,
JobID: e.JobID,
JobModifyIndex: e.JobModifyIndex,
Status: EvalStatusBlocked,
PreviousEval: e.ID,
ClassEligibility: classEligibility,
EscapedComputedClass: escaped,
QuotaLimitReached: quotaReached,
CreateTime: now,
ModifyTime: now,
}
}
// CreateFailedFollowUpEval creates a follow up evaluation when the current one
// has been marked as failed because it has hit the delivery limit and will not
// be retried by the eval_broker. Callers should copy the created eval's ID to
// into the old eval's NextEval field.
func (e *Evaluation) CreateFailedFollowUpEval(wait time.Duration) *Evaluation {
now := time.Now().UTC().UnixNano()
return &Evaluation{
ID: uuid.Generate(),
Namespace: e.Namespace,
Priority: e.Priority,
Type: e.Type,
TriggeredBy: EvalTriggerFailedFollowUp,
JobID: e.JobID,
JobModifyIndex: e.JobModifyIndex,
Status: EvalStatusPending,
Wait: wait,
PreviousEval: e.ID,
CreateTime: now,
ModifyTime: now,
}
}
// UpdateModifyTime takes into account that clocks on different servers may be
// slightly out of sync. Even in case of a leader change, this method will
// guarantee that ModifyTime will always be after CreateTime.
func (e *Evaluation) UpdateModifyTime() {
now := time.Now().UTC().UnixNano()
if now <= e.CreateTime {
e.ModifyTime = e.CreateTime + 1
} else {
e.ModifyTime = now
}
}
// Plan is used to submit a commit plan for task allocations. These
// are submitted to the leader which verifies that resources have
// not been overcommitted before admitting the plan.
type Plan struct {
// msgpack omit empty fields during serialization
_struct bool `codec:",omitempty"` // nolint: structcheck
// EvalID is the evaluation ID this plan is associated with
EvalID string
// EvalToken is used to prevent a split-brain processing of
// an evaluation. There should only be a single scheduler running
// an Eval at a time, but this could be violated after a leadership
// transition. This unique token is used to reject plans that are
// being submitted from a different leader.
EvalToken string
// Priority is the priority of the upstream job
Priority int
// AllAtOnce is used to control if incremental scheduling of task groups
// is allowed or if we must do a gang scheduling of the entire job.
// If this is false, a plan may be partially applied. Otherwise, the
// entire plan must be able to make progress.
AllAtOnce bool
// Job is the parent job of all the allocations in the Plan.
// Since a Plan only involves a single Job, we can reduce the size
// of the plan by only including it once.
Job *Job
// NodeUpdate contains all the allocations for each node. For each node,
// this is a list of the allocations to update to either stop or evict.
NodeUpdate map[string][]*Allocation
// NodeAllocation contains all the allocations for each node.
// The evicts must be considered prior to the allocations.
NodeAllocation map[string][]*Allocation
// Annotations contains annotations by the scheduler to be used by operators
// to understand the decisions made by the scheduler.
Annotations *PlanAnnotations
// Deployment is the deployment created or updated by the scheduler that
// should be applied by the planner.
Deployment *Deployment
// DeploymentUpdates is a set of status updates to apply to the given
// deployments. This allows the scheduler to cancel any unneeded deployment
// because the job is stopped or the update block is removed.
DeploymentUpdates []*DeploymentStatusUpdate
// NodePreemptions is a map from node id to a set of allocations from other
// lower priority jobs that are preempted. Preempted allocations are marked
// as evicted.
NodePreemptions map[string][]*Allocation
// SnapshotIndex is the Raft index of the snapshot used to create the
// Plan. The leader will wait to evaluate the plan until its StateStore
// has reached at least this index.
SnapshotIndex uint64
}
// AppendStoppedAlloc marks an allocation to be stopped. The clientStatus of the
// allocation may be optionally set by passing in a non-empty value.
func (p *Plan) AppendStoppedAlloc(alloc *Allocation, desiredDesc, clientStatus, followupEvalID string) {
newAlloc := new(Allocation)
*newAlloc = *alloc
// If the job is not set in the plan we are deregistering a job so we
// extract the job from the allocation.
if p.Job == nil && newAlloc.Job != nil {
p.Job = newAlloc.Job
}
// Normalize the job
newAlloc.Job = nil
// Strip the resources as it can be rebuilt.
newAlloc.Resources = nil
newAlloc.DesiredStatus = AllocDesiredStatusStop
newAlloc.DesiredDescription = desiredDesc
if clientStatus != "" {
newAlloc.ClientStatus = clientStatus
}
newAlloc.AppendState(AllocStateFieldClientStatus, clientStatus)
if followupEvalID != "" {
newAlloc.FollowupEvalID = followupEvalID
}
node := alloc.NodeID
existing := p.NodeUpdate[node]
p.NodeUpdate[node] = append(existing, newAlloc)
}
// AppendPreemptedAlloc is used to append an allocation that's being preempted to the plan.
// To minimize the size of the plan, this only sets a minimal set of fields in the allocation
func (p *Plan) AppendPreemptedAlloc(alloc *Allocation, preemptingAllocID string) {
newAlloc := &Allocation{}
newAlloc.ID = alloc.ID
newAlloc.JobID = alloc.JobID
newAlloc.Namespace = alloc.Namespace
newAlloc.DesiredStatus = AllocDesiredStatusEvict
newAlloc.PreemptedByAllocation = preemptingAllocID
desiredDesc := fmt.Sprintf("Preempted by alloc ID %v", preemptingAllocID)
newAlloc.DesiredDescription = desiredDesc
// TaskResources are needed by the plan applier to check if allocations fit
// after removing preempted allocations
if alloc.AllocatedResources != nil {
newAlloc.AllocatedResources = alloc.AllocatedResources
} else {
// COMPAT Remove in version 0.11
newAlloc.TaskResources = alloc.TaskResources
newAlloc.SharedResources = alloc.SharedResources
}
// Append this alloc to slice for this node
node := alloc.NodeID
existing := p.NodePreemptions[node]
p.NodePreemptions[node] = append(existing, newAlloc)
}
func (p *Plan) PopUpdate(alloc *Allocation) {
existing := p.NodeUpdate[alloc.NodeID]
n := len(existing)
if n > 0 && existing[n-1].ID == alloc.ID {
existing = existing[:n-1]
if len(existing) > 0 {
p.NodeUpdate[alloc.NodeID] = existing
} else {
delete(p.NodeUpdate, alloc.NodeID)
}
}
}
// AppendAlloc appends the alloc to the plan allocations.
// Uses the passed job if explicitly passed, otherwise
// it is assumed the alloc will use the plan Job version.
func (p *Plan) AppendAlloc(alloc *Allocation, job *Job) {
node := alloc.NodeID
existing := p.NodeAllocation[node]
alloc.Job = job
p.NodeAllocation[node] = append(existing, alloc)
}
// IsNoOp checks if this plan would do nothing
func (p *Plan) IsNoOp() bool {
return len(p.NodeUpdate) == 0 &&
len(p.NodeAllocation) == 0 &&
p.Deployment == nil &&
len(p.DeploymentUpdates) == 0
}
// NormalizeAllocations normalizes allocations to remove fields that can
// be fetched from the MemDB instead of sending over the wire
func (p *Plan) NormalizeAllocations() {
for _, allocs := range p.NodeUpdate {
for i, alloc := range allocs {
allocs[i] = &Allocation{
ID: alloc.ID,
DesiredDescription: alloc.DesiredDescription,
ClientStatus: alloc.ClientStatus,
FollowupEvalID: alloc.FollowupEvalID,
}
}
}
for _, allocs := range p.NodePreemptions {
for i, alloc := range allocs {
allocs[i] = &Allocation{
ID: alloc.ID,
PreemptedByAllocation: alloc.PreemptedByAllocation,
}
}
}
}
// PlanResult is the result of a plan submitted to the leader.
type PlanResult struct {
// NodeUpdate contains all the updates that were committed.
NodeUpdate map[string][]*Allocation
// NodeAllocation contains all the allocations that were committed.
NodeAllocation map[string][]*Allocation
// Deployment is the deployment that was committed.
Deployment *Deployment
// DeploymentUpdates is the set of deployment updates that were committed.
DeploymentUpdates []*DeploymentStatusUpdate
// NodePreemptions is a map from node id to a set of allocations from other
// lower priority jobs that are preempted. Preempted allocations are marked
// as stopped.
NodePreemptions map[string][]*Allocation
// RefreshIndex is the index the worker should refresh state up to.
// This allows all evictions and allocations to be materialized.
// If any allocations were rejected due to stale data (node state,
// over committed) this can be used to force a worker refresh.
RefreshIndex uint64
// AllocIndex is the Raft index in which the evictions and
// allocations took place. This is used for the write index.
AllocIndex uint64
}
// IsNoOp checks if this plan result would do nothing
func (p *PlanResult) IsNoOp() bool {
return len(p.NodeUpdate) == 0 && len(p.NodeAllocation) == 0 &&
len(p.DeploymentUpdates) == 0 && p.Deployment == nil
}
// FullCommit is used to check if all the allocations in a plan
// were committed as part of the result. Returns if there was
// a match, and the number of expected and actual allocations.
func (p *PlanResult) FullCommit(plan *Plan) (bool, int, int) {
expected := 0
actual := 0
for name, allocList := range plan.NodeAllocation {
didAlloc, _ := p.NodeAllocation[name]
expected += len(allocList)
actual += len(didAlloc)
}
return actual == expected, expected, actual
}
// PlanAnnotations holds annotations made by the scheduler to give further debug
// information to operators.
type PlanAnnotations struct {
// DesiredTGUpdates is the set of desired updates per task group.
DesiredTGUpdates map[string]*DesiredUpdates
// PreemptedAllocs is the set of allocations to be preempted to make the placement successful.
PreemptedAllocs []*AllocListStub
}
// DesiredUpdates is the set of changes the scheduler would like to make given
// sufficient resources and cluster capacity.
type DesiredUpdates struct {
Ignore uint64
Place uint64
Migrate uint64
Stop uint64
InPlaceUpdate uint64
DestructiveUpdate uint64
Canary uint64
Preemptions uint64
}
func (d *DesiredUpdates) GoString() string {
return fmt.Sprintf("(place %d) (inplace %d) (destructive %d) (stop %d) (migrate %d) (ignore %d) (canary %d)",
d.Place, d.InPlaceUpdate, d.DestructiveUpdate, d.Stop, d.Migrate, d.Ignore, d.Canary)
}
// msgpackHandle is a shared handle for encoding/decoding of structs
var MsgpackHandle = func() *codec.MsgpackHandle {
h := &codec.MsgpackHandle{}
h.RawToString = true
// maintain binary format from time prior to upgrading latest ugorji
h.BasicHandle.TimeNotBuiltin = true
// Sets the default type for decoding a map into a nil interface{}.
// This is necessary in particular because we store the driver configs as a
// nil interface{}.
h.MapType = reflect.TypeOf(map[string]interface{}(nil))
// only review struct codec tags
h.TypeInfos = codec.NewTypeInfos([]string{"codec"})
return h
}()
var (
// JsonHandle and JsonHandlePretty are the codec handles to JSON encode
// structs. The pretty handle will add indents for easier human consumption.
JsonHandle = &codec.JsonHandle{
HTMLCharsAsIs: true,
}
JsonHandlePretty = &codec.JsonHandle{
HTMLCharsAsIs: true,
Indent: 4,
}
)
// Decode is used to decode a MsgPack encoded object
func Decode(buf []byte, out interface{}) error {
return codec.NewDecoder(bytes.NewReader(buf), MsgpackHandle).Decode(out)
}
// Encode is used to encode a MsgPack object with type prefix
func Encode(t MessageType, msg interface{}) ([]byte, error) {
var buf bytes.Buffer
buf.WriteByte(uint8(t))
err := codec.NewEncoder(&buf, MsgpackHandle).Encode(msg)
return buf.Bytes(), err
}
// KeyringResponse is a unified key response and can be used for install,
// remove, use, as well as listing key queries.
type KeyringResponse struct {
Messages map[string]string
Keys map[string]int
NumNodes int
}
// KeyringRequest is request objects for serf key operations.
type KeyringRequest struct {
Key string
}
// RecoverableError wraps an error and marks whether it is recoverable and could
// be retried or it is fatal.
type RecoverableError struct {
Err string
Recoverable bool
}
// NewRecoverableError is used to wrap an error and mark it as recoverable or
// not.
func NewRecoverableError(e error, recoverable bool) error {
if e == nil {
return nil
}
return &RecoverableError{
Err: e.Error(),
Recoverable: recoverable,
}
}
// WrapRecoverable wraps an existing error in a new RecoverableError with a new
// message. If the error was recoverable before the returned error is as well;
// otherwise it is unrecoverable.
func WrapRecoverable(msg string, err error) error {
return &RecoverableError{Err: msg, Recoverable: IsRecoverable(err)}
}
func (r *RecoverableError) Error() string {
return r.Err
}
func (r *RecoverableError) IsRecoverable() bool {
return r.Recoverable
}
func (r *RecoverableError) IsUnrecoverable() bool {
return !r.Recoverable
}
// Recoverable is an interface for errors to implement to indicate whether or
// not they are fatal or recoverable.
type Recoverable interface {
error
IsRecoverable() bool
}
// IsRecoverable returns true if error is a RecoverableError with
// Recoverable=true. Otherwise false is returned.
func IsRecoverable(e error) bool {
if re, ok := e.(Recoverable); ok {
return re.IsRecoverable()
}
return false
}
// WrappedServerError wraps an error and satisfies
// both the Recoverable and the ServerSideError interfaces
type WrappedServerError struct {
Err error
}
// NewWrappedServerError is used to create a wrapped server side error
func NewWrappedServerError(e error) error {
return &WrappedServerError{
Err: e,
}
}
func (r *WrappedServerError) IsRecoverable() bool {
return IsRecoverable(r.Err)
}
func (r *WrappedServerError) Error() string {
return r.Err.Error()
}
func (r *WrappedServerError) IsServerSide() bool {
return true
}
// ServerSideError is an interface for errors to implement to indicate
// errors occurring after the request makes it to a server
type ServerSideError interface {
error
IsServerSide() bool
}
// IsServerSide returns true if error is a wrapped
// server side error
func IsServerSide(e error) bool {
if se, ok := e.(ServerSideError); ok {
return se.IsServerSide()
}
return false
}
// ACLPolicy is used to represent an ACL policy
type ACLPolicy struct {
Name string // Unique name
Description string // Human readable
Rules string // HCL or JSON format
RulesJSON *acl.Policy // Generated from Rules on read
Hash []byte
CreateIndex uint64
ModifyIndex uint64
}
// SetHash is used to compute and set the hash of the ACL policy
func (c *ACLPolicy) SetHash() []byte {
// Initialize a 256bit Blake2 hash (32 bytes)
hash, err := blake2b.New256(nil)
if err != nil {
panic(err)
}
// Write all the user set fields
hash.Write([]byte(c.Name))
hash.Write([]byte(c.Description))
hash.Write([]byte(c.Rules))
// Finalize the hash
hashVal := hash.Sum(nil)
// Set and return the hash
c.Hash = hashVal
return hashVal
}
func (a *ACLPolicy) Stub() *ACLPolicyListStub {
return &ACLPolicyListStub{
Name: a.Name,
Description: a.Description,
Hash: a.Hash,
CreateIndex: a.CreateIndex,
ModifyIndex: a.ModifyIndex,
}
}
func (a *ACLPolicy) Validate() error {
var mErr multierror.Error
if !validPolicyName.MatchString(a.Name) {
err := fmt.Errorf("invalid name '%s'", a.Name)
mErr.Errors = append(mErr.Errors, err)
}
if _, err := acl.Parse(a.Rules); err != nil {
err = fmt.Errorf("failed to parse rules: %v", err)
mErr.Errors = append(mErr.Errors, err)
}
if len(a.Description) > maxPolicyDescriptionLength {
err := fmt.Errorf("description longer than %d", maxPolicyDescriptionLength)
mErr.Errors = append(mErr.Errors, err)
}
return mErr.ErrorOrNil()
}
// ACLPolicyListStub is used to for listing ACL policies
type ACLPolicyListStub struct {
Name string
Description string
Hash []byte
CreateIndex uint64
ModifyIndex uint64
}
// ACLPolicyListRequest is used to request a list of policies
type ACLPolicyListRequest struct {
QueryOptions
}
// ACLPolicySpecificRequest is used to query a specific policy
type ACLPolicySpecificRequest struct {
Name string
QueryOptions
}
// ACLPolicySetRequest is used to query a set of policies
type ACLPolicySetRequest struct {
Names []string
QueryOptions
}
// ACLPolicyListResponse is used for a list request
type ACLPolicyListResponse struct {
Policies []*ACLPolicyListStub
QueryMeta
}
// SingleACLPolicyResponse is used to return a single policy
type SingleACLPolicyResponse struct {
Policy *ACLPolicy
QueryMeta
}
// ACLPolicySetResponse is used to return a set of policies
type ACLPolicySetResponse struct {
Policies map[string]*ACLPolicy
QueryMeta
}
// ACLPolicyDeleteRequest is used to delete a set of policies
type ACLPolicyDeleteRequest struct {
Names []string
WriteRequest
}
// ACLPolicyUpsertRequest is used to upsert a set of policies
type ACLPolicyUpsertRequest struct {
Policies []*ACLPolicy
WriteRequest
}
// ACLToken represents a client token which is used to Authenticate
type ACLToken struct {
AccessorID string // Public Accessor ID (UUID)
SecretID string // Secret ID, private (UUID)
Name string // Human friendly name
Type string // Client or Management
Policies []string // Policies this token ties to
Global bool // Global or Region local
Hash []byte
CreateTime time.Time // Time of creation
CreateIndex uint64
ModifyIndex uint64
}
var (
// AnonymousACLToken is used no SecretID is provided, and the
// request is made anonymously.
AnonymousACLToken = &ACLToken{
AccessorID: "anonymous",
Name: "Anonymous Token",
Type: ACLClientToken,
Policies: []string{"anonymous"},
Global: false,
}
)
type ACLTokenListStub struct {
AccessorID string
Name string
Type string
Policies []string
Global bool
Hash []byte
CreateTime time.Time
CreateIndex uint64
ModifyIndex uint64
}
// SetHash is used to compute and set the hash of the ACL token
func (a *ACLToken) SetHash() []byte {
// Initialize a 256bit Blake2 hash (32 bytes)
hash, err := blake2b.New256(nil)
if err != nil {
panic(err)
}
// Write all the user set fields
hash.Write([]byte(a.Name))
hash.Write([]byte(a.Type))
for _, policyName := range a.Policies {
hash.Write([]byte(policyName))
}
if a.Global {
hash.Write([]byte("global"))
} else {
hash.Write([]byte("local"))
}
// Finalize the hash
hashVal := hash.Sum(nil)
// Set and return the hash
a.Hash = hashVal
return hashVal
}
func (a *ACLToken) Stub() *ACLTokenListStub {
return &ACLTokenListStub{
AccessorID: a.AccessorID,
Name: a.Name,
Type: a.Type,
Policies: a.Policies,
Global: a.Global,
Hash: a.Hash,
CreateTime: a.CreateTime,
CreateIndex: a.CreateIndex,
ModifyIndex: a.ModifyIndex,
}
}
// Validate is used to sanity check a token
func (a *ACLToken) Validate() error {
var mErr multierror.Error
if len(a.Name) > maxTokenNameLength {
mErr.Errors = append(mErr.Errors, fmt.Errorf("token name too long"))
}
switch a.Type {
case ACLClientToken:
if len(a.Policies) == 0 {
mErr.Errors = append(mErr.Errors, fmt.Errorf("client token missing policies"))
}
case ACLManagementToken:
if len(a.Policies) != 0 {
mErr.Errors = append(mErr.Errors, fmt.Errorf("management token cannot be associated with policies"))
}
default:
mErr.Errors = append(mErr.Errors, fmt.Errorf("token type must be client or management"))
}
return mErr.ErrorOrNil()
}
// PolicySubset checks if a given set of policies is a subset of the token
func (a *ACLToken) PolicySubset(policies []string) bool {
// Hot-path the management tokens, superset of all policies.
if a.Type == ACLManagementToken {
return true
}
associatedPolicies := make(map[string]struct{}, len(a.Policies))
for _, policy := range a.Policies {
associatedPolicies[policy] = struct{}{}
}
for _, policy := range policies {
if _, ok := associatedPolicies[policy]; !ok {
return false
}
}
return true
}
// ACLTokenListRequest is used to request a list of tokens
type ACLTokenListRequest struct {
GlobalOnly bool
QueryOptions
}
// ACLTokenSpecificRequest is used to query a specific token
type ACLTokenSpecificRequest struct {
AccessorID string
QueryOptions
}
// ACLTokenSetRequest is used to query a set of tokens
type ACLTokenSetRequest struct {
AccessorIDS []string
QueryOptions
}
// ACLTokenListResponse is used for a list request
type ACLTokenListResponse struct {
Tokens []*ACLTokenListStub
QueryMeta
}
// SingleACLTokenResponse is used to return a single token
type SingleACLTokenResponse struct {
Token *ACLToken
QueryMeta
}
// ACLTokenSetResponse is used to return a set of token
type ACLTokenSetResponse struct {
Tokens map[string]*ACLToken // Keyed by Accessor ID
QueryMeta
}
// ResolveACLTokenRequest is used to resolve a specific token
type ResolveACLTokenRequest struct {
SecretID string
QueryOptions
}
// ResolveACLTokenResponse is used to resolve a single token
type ResolveACLTokenResponse struct {
Token *ACLToken
QueryMeta
}
// ACLTokenDeleteRequest is used to delete a set of tokens
type ACLTokenDeleteRequest struct {
AccessorIDs []string
WriteRequest
}
// ACLTokenBootstrapRequest is used to bootstrap ACLs
type ACLTokenBootstrapRequest struct {
Token *ACLToken // Not client specifiable
ResetIndex uint64 // Reset index is used to clear the bootstrap token
WriteRequest
}
// ACLTokenUpsertRequest is used to upsert a set of tokens
type ACLTokenUpsertRequest struct {
Tokens []*ACLToken
WriteRequest
}
// ACLTokenUpsertResponse is used to return from an ACLTokenUpsertRequest
type ACLTokenUpsertResponse struct {
Tokens []*ACLToken
WriteMeta
}
// RpcError is used for serializing errors with a potential error code
type RpcError struct {
Message string
Code *int64
}
func NewRpcError(err error, code *int64) *RpcError {
return &RpcError{
Message: err.Error(),
Code: code,
}
}
func (r *RpcError) Error() string {
return r.Message
}
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