package structs import ( "bytes" "crypto/md5" "encoding/json" "fmt" "math/rand" "net" "reflect" "regexp" "sort" "strconv" "strings" "time" "github.com/hashicorp/go-msgpack/codec" "github.com/hashicorp/go-multierror" "github.com/hashicorp/serf/coordinate" "github.com/mitchellh/hashstructure" "github.com/hashicorp/consul/agent/cache" "github.com/hashicorp/consul/api" "github.com/hashicorp/consul/lib" "github.com/hashicorp/consul/types" ) type MessageType uint8 // RaftIndex is used to track the index used while creating // or modifying a given struct type. type RaftIndex struct { CreateIndex uint64 `bexpr:"-"` ModifyIndex uint64 `bexpr:"-"` } // These are serialized between Consul servers and stored in Consul snapshots, // so entries must only ever be added. const ( RegisterRequestType MessageType = 0 DeregisterRequestType = 1 KVSRequestType = 2 SessionRequestType = 3 ACLRequestType = 4 // DEPRECATED (ACL-Legacy-Compat) TombstoneRequestType = 5 CoordinateBatchUpdateType = 6 PreparedQueryRequestType = 7 TxnRequestType = 8 AutopilotRequestType = 9 AreaRequestType = 10 ACLBootstrapRequestType = 11 IntentionRequestType = 12 ConnectCARequestType = 13 ConnectCAProviderStateType = 14 ConnectCAConfigType = 15 // FSM snapshots only. IndexRequestType = 16 // FSM snapshots only. ACLTokenSetRequestType = 17 ACLTokenDeleteRequestType = 18 ACLPolicySetRequestType = 19 ACLPolicyDeleteRequestType = 20 ConnectCALeafRequestType = 21 ConfigEntryRequestType = 22 ACLRoleSetRequestType = 23 ACLRoleDeleteRequestType = 24 ACLBindingRuleSetRequestType = 25 ACLBindingRuleDeleteRequestType = 26 ACLAuthMethodSetRequestType = 27 ACLAuthMethodDeleteRequestType = 28 ChunkingStateType = 29 FederationStateRequestType = 30 ) 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 // NodeMaint is the special key set by a node in maintenance mode. NodeMaint = "_node_maintenance" // ServiceMaintPrefix is the prefix for a service in maintenance mode. ServiceMaintPrefix = "_service_maintenance:" // The meta key prefix reserved for Consul's internal use metaKeyReservedPrefix = "consul-" // metaMaxKeyPairs is maximum number of metadata key pairs allowed to be registered metaMaxKeyPairs = 64 // metaKeyMaxLength is the maximum allowed length of a metadata key metaKeyMaxLength = 128 // metaValueMaxLength is the maximum allowed length of a metadata value metaValueMaxLength = 512 // MetaSegmentKey is the node metadata key used to store the node's network segment MetaSegmentKey = "consul-network-segment" // MetaWANFederationKey is the mesh gateway metadata key that indicates a // mesh gateway is usable for wan federation. MetaWANFederationKey = "consul-wan-federation" // MaxLockDelay provides a maximum LockDelay value for // a session. Any value above this will not be respected. MaxLockDelay = 60 * time.Second // lockDelayMinThreshold is used in JSON decoding to convert a // numeric lockdelay value from nanoseconds to seconds if it is // below thisthreshold. Users often send a value like 5, which // they assumeis seconds, but because Go uses nanosecond granularity, // ends up being very small. If we see a value below this threshold, // we multiply by time.Second lockDelayMinThreshold = 1000 // WildcardSpecifier is the string which should be used for specifying a wildcard // The exact semantics of the wildcard is left up to the code where its used. WildcardSpecifier = "*" ) var allowedConsulMetaKeysForMeshGateway = map[string]struct{}{MetaWANFederationKey: {}} var ( NodeMaintCheckID = NewCheckID(NodeMaint, nil) ) const ( TaggedAddressWAN = "wan" TaggedAddressWANIPv4 = "wan_ipv4" TaggedAddressWANIPv6 = "wan_ipv6" TaggedAddressLAN = "lan" TaggedAddressLANIPv4 = "lan_ipv4" TaggedAddressLANIPv6 = "lan_ipv6" ) // metaKeyFormat checks if a metadata key string is valid var metaKeyFormat = regexp.MustCompile(`^[a-zA-Z0-9_-]+$`).MatchString func ValidStatus(s string) bool { return s == api.HealthPassing || s == api.HealthWarning || s == api.HealthCritical } // RPCInfo is used to describe common information about query type RPCInfo interface { RequestDatacenter() string IsRead() bool AllowStaleRead() bool TokenSecret() string SetTokenSecret(string) } // QueryOptions is used to specify various flags for read queries type QueryOptions struct { // Token is the ACL token ID. If not provided, the 'anonymous' // token is assumed for backwards compatibility. Token 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, the leader must verify leadership prior to // servicing the request. Prevents a stale read. RequireConsistent bool // If set, the local agent may respond with an arbitrarily stale locally // cached response. The semantics differ from AllowStale since the agent may // be entirely partitioned from the servers and still considered "healthy" by // operators. Stale responses from Servers are also arbitrarily stale, but can // provide additional bounds on the last contact time from the leader. It's // expected that servers that are partitioned are noticed and replaced in a // timely way by operators while the same may not be true for client agents. UseCache bool // If set and AllowStale is true, will try first a stale // read, and then will perform a consistent read if stale // read is older than value. MaxStaleDuration time.Duration // MaxAge limits how old a cached value will be returned if UseCache is true. // If there is a cached response that is older than the MaxAge, it is treated // as a cache miss and a new fetch invoked. If the fetch fails, the error is // returned. Clients that wish to allow for stale results on error can set // StaleIfError to a longer duration to change this behavior. It is ignored // if the endpoint supports background refresh caching. See // https://www.consul.io/api/index.html#agent-caching for more details. MaxAge time.Duration // MustRevalidate forces the agent to fetch a fresh version of a cached // resource or at least validate that the cached version is still fresh. It is // implied by either max-age=0 or must-revalidate Cache-Control headers. It // only makes sense when UseCache is true. We store it since MaxAge = 0 is the // default unset value. MustRevalidate bool // StaleIfError specifies how stale the client will accept a cached response // if the servers are unavailable to fetch a fresh one. Only makes sense when // UseCache is true and MaxAge is set to a lower, non-zero value. It is // ignored if the endpoint supports background refresh caching. See // https://www.consul.io/api/index.html#agent-caching for more details. StaleIfError time.Duration // Filter specifies the go-bexpr filter expression to be used for // filtering the data prior to returning a response Filter string // AllowNotModifiedResponse indicates that if the MinIndex matches the // QueryMeta.Index, the response can be left empty and QueryMeta.NotModified // will be set to true to indicate the result of the query has not changed. AllowNotModifiedResponse bool } // IsRead is always true for QueryOption. func (q QueryOptions) IsRead() bool { return true } // ConsistencyLevel display the consistency required by a request func (q QueryOptions) ConsistencyLevel() string { if q.RequireConsistent { return "consistent" } else if q.AllowStale { return "stale" } else { return "leader" } } func (q QueryOptions) AllowStaleRead() bool { return q.AllowStale } func (q QueryOptions) TokenSecret() string { return q.Token } func (q *QueryOptions) SetTokenSecret(s string) { q.Token = s } type WriteRequest struct { // Token is the ACL token ID. If not provided, the 'anonymous' // token is assumed for backwards compatibility. Token string } // WriteRequest only applies to writes, always false func (w WriteRequest) IsRead() bool { return false } func (w WriteRequest) AllowStaleRead() bool { return false } func (w WriteRequest) TokenSecret() string { return w.Token } func (w *WriteRequest) SetTokenSecret(s string) { w.Token = s } // QueryMeta allows a query response to include potentially // useful metadata about a query type QueryMeta struct { // Index in the raft log of the latest item returned by the query. 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 // Consistencylevel returns the consistency used to serve the query // Having `discovery_max_stale` on the agent can affect whether // the request was served by a leader. ConsistencyLevel string // NotModified is true when the Index of the query is the same value as the // requested MinIndex. It indicates that the entity has not been modified. // When NotModified is true, the response will not contain the result of // the query. NotModified bool } // RegisterRequest is used for the Catalog.Register endpoint // to register a node as providing a service. If no service // is provided, the node is registered. type RegisterRequest struct { Datacenter string ID types.NodeID Node string Address string TaggedAddresses map[string]string NodeMeta map[string]string Service *NodeService Check *HealthCheck Checks HealthChecks // SkipNodeUpdate can be used when a register request is intended for // updating a service and/or checks, but doesn't want to overwrite any // node information if the node is already registered. If the node // doesn't exist, it will still be created, but if the node exists, any // node portion of this update will not apply. SkipNodeUpdate bool // EnterpriseMeta is the embedded enterprise metadata EnterpriseMeta `hcl:",squash" mapstructure:",squash"` WriteRequest RaftIndex `bexpr:"-"` } func (r *RegisterRequest) RequestDatacenter() string { return r.Datacenter } // ChangesNode returns true if the given register request changes the given // node, which can be nil. This only looks for changes to the node record itself, // not any of the health checks. func (r *RegisterRequest) ChangesNode(node *Node) bool { // This means it's creating the node. if node == nil { return true } // If we've been asked to skip the node update, then say there are no // changes. if r.SkipNodeUpdate { return false } // Check if any of the node-level fields are being changed. if r.ID != node.ID || r.Node != node.Node || r.Address != node.Address || r.Datacenter != node.Datacenter || !reflect.DeepEqual(r.TaggedAddresses, node.TaggedAddresses) || !reflect.DeepEqual(r.NodeMeta, node.Meta) { return true } return false } // DeregisterRequest is used for the Catalog.Deregister endpoint // to deregister a node as providing a service. If no service is // provided the entire node is deregistered. type DeregisterRequest struct { Datacenter string Node string ServiceID string CheckID types.CheckID EnterpriseMeta `hcl:",squash" mapstructure:",squash"` WriteRequest } func (r *DeregisterRequest) RequestDatacenter() string { return r.Datacenter } func (r *DeregisterRequest) UnmarshalJSON(data []byte) error { type Alias DeregisterRequest aux := &struct { Address string // obsolete field - but we want to explicitly allow it *Alias }{ Alias: (*Alias)(r), } if err := lib.UnmarshalJSON(data, &aux); err != nil { return err } return nil } // QuerySource is used to pass along information about the source node // in queries so that we can adjust the response based on its network // coordinates. type QuerySource struct { Datacenter string Segment string Node string Ip string } type DatacentersRequest struct { QueryOptions } func (r *DatacentersRequest) CacheInfo() cache.RequestInfo { return cache.RequestInfo{ Token: "", Datacenter: "", MinIndex: 0, Timeout: r.MaxQueryTime, MaxAge: r.MaxAge, MustRevalidate: r.MustRevalidate, Key: "catalog-datacenters", // must not be empty for cache to work } } // DCSpecificRequest is used to query about a specific DC type DCSpecificRequest struct { Datacenter string NodeMetaFilters map[string]string Source QuerySource EnterpriseMeta `hcl:",squash" mapstructure:",squash"` QueryOptions } func (r *DCSpecificRequest) RequestDatacenter() string { return r.Datacenter } func (r *DCSpecificRequest) CacheInfo() cache.RequestInfo { info := cache.RequestInfo{ Token: r.Token, Datacenter: r.Datacenter, MinIndex: r.MinQueryIndex, Timeout: r.MaxQueryTime, MaxAge: r.MaxAge, MustRevalidate: r.MustRevalidate, } // To calculate the cache key we only hash the node meta filters and the bexpr filter. // The datacenter is handled by the cache framework. The other fields are // not, but should not be used in any cache types. v, err := hashstructure.Hash([]interface{}{ r.NodeMetaFilters, r.Filter, r.EnterpriseMeta, }, nil) if err == nil { // If there is an error, we don't set the key. A blank key forces // no cache for this request so the request is forwarded directly // to the server. info.Key = strconv.FormatUint(v, 10) } return info } func (r *DCSpecificRequest) CacheMinIndex() uint64 { return r.QueryOptions.MinQueryIndex } type ServiceDumpRequest struct { Datacenter string ServiceKind ServiceKind UseServiceKind bool Source QuerySource EnterpriseMeta `hcl:",squash" mapstructure:",squash"` QueryOptions } func (r *ServiceDumpRequest) RequestDatacenter() string { return r.Datacenter } func (r *ServiceDumpRequest) CacheInfo() cache.RequestInfo { info := cache.RequestInfo{ Token: r.Token, Datacenter: r.Datacenter, MinIndex: r.MinQueryIndex, Timeout: r.MaxQueryTime, MaxAge: r.MaxAge, MustRevalidate: r.MustRevalidate, } // When we are not using the service kind we want to normalize the ServiceKind keyKind := ServiceKindTypical if r.UseServiceKind { keyKind = r.ServiceKind } // To calculate the cache key we only hash the node meta filters and the bexpr filter. // The datacenter is handled by the cache framework. The other fields are // not, but should not be used in any cache types. v, err := hashstructure.Hash([]interface{}{ keyKind, r.UseServiceKind, r.Filter, r.EnterpriseMeta, }, nil) if err == nil { // If there is an error, we don't set the key. A blank key forces // no cache for this request so the request is forwarded directly // to the server. info.Key = strconv.FormatUint(v, 10) } return info } func (r *ServiceDumpRequest) CacheMinIndex() uint64 { return r.QueryOptions.MinQueryIndex } // ServiceSpecificRequest is used to query about a specific service type ServiceSpecificRequest struct { Datacenter string NodeMetaFilters map[string]string ServiceName string // DEPRECATED (singular-service-tag) - remove this when backwards RPC compat // with 1.2.x is not required. ServiceTag string ServiceTags []string ServiceAddress string TagFilter bool // Controls tag filtering Source QuerySource // Connect if true will only search for Connect-compatible services. Connect bool // Ingress if true will only search for Ingress gateways for the given service. Ingress bool EnterpriseMeta `hcl:",squash" mapstructure:",squash"` QueryOptions } func (r *ServiceSpecificRequest) RequestDatacenter() string { return r.Datacenter } func (r *ServiceSpecificRequest) CacheInfo() cache.RequestInfo { info := cache.RequestInfo{ Token: r.Token, Datacenter: r.Datacenter, MinIndex: r.MinQueryIndex, Timeout: r.MaxQueryTime, MaxAge: r.MaxAge, MustRevalidate: r.MustRevalidate, } // To calculate the cache key we hash over all the fields that affect the // output other than Datacenter and Token which are dealt with in the cache // framework already. Note the order here is important for the outcome - if we // ever care about cache-invalidation on updates e.g. because we persist // cached results, we need to be careful we maintain the same order of fields // here. We could alternatively use `hash:set` struct tag on an anonymous // struct to make it more robust if it becomes significant. sort.Strings(r.ServiceTags) v, err := hashstructure.Hash([]interface{}{ r.NodeMetaFilters, r.ServiceName, // DEPRECATED (singular-service-tag) - remove this when upgrade RPC compat // with 1.2.x is not required. We still need this in because <1.3 agents // might still send RPCs with singular tag set. In fact the only place we // use this method is in agent cache so if the agent is new enough to have // this code this should never be set, but it's safer to include it until we // completely remove this field just in case it's erroneously used anywhere // (e.g. until this change DNS still used it). r.ServiceTag, r.ServiceTags, r.ServiceAddress, r.TagFilter, r.Connect, r.Filter, r.EnterpriseMeta, }, nil) if err == nil { // If there is an error, we don't set the key. A blank key forces // no cache for this request so the request is forwarded directly // to the server. info.Key = strconv.FormatUint(v, 10) } return info } func (r *ServiceSpecificRequest) CacheMinIndex() uint64 { return r.QueryOptions.MinQueryIndex } // NodeSpecificRequest is used to request the information about a single node type NodeSpecificRequest struct { Datacenter string Node string EnterpriseMeta `hcl:",squash" mapstructure:",squash"` QueryOptions } func (r *NodeSpecificRequest) RequestDatacenter() string { return r.Datacenter } func (r *NodeSpecificRequest) CacheInfo() cache.RequestInfo { info := cache.RequestInfo{ Token: r.Token, Datacenter: r.Datacenter, MinIndex: r.MinQueryIndex, Timeout: r.MaxQueryTime, MaxAge: r.MaxAge, MustRevalidate: r.MustRevalidate, } v, err := hashstructure.Hash([]interface{}{ r.Node, r.Filter, r.EnterpriseMeta, }, nil) if err == nil { // If there is an error, we don't set the key. A blank key forces // no cache for this request so the request is forwarded directly // to the server. info.Key = strconv.FormatUint(v, 10) } return info } // ChecksInStateRequest is used to query for nodes in a state type ChecksInStateRequest struct { Datacenter string NodeMetaFilters map[string]string State string Source QuerySource EnterpriseMeta `mapstructure:",squash"` QueryOptions } func (r *ChecksInStateRequest) RequestDatacenter() string { return r.Datacenter } // Used to return information about a node type Node struct { ID types.NodeID Node string Address string Datacenter string TaggedAddresses map[string]string Meta map[string]string RaftIndex `bexpr:"-"` } func (n *Node) BestAddress(wan bool) string { if wan { if addr, ok := n.TaggedAddresses[TaggedAddressWAN]; ok { return addr } } return n.Address } type Nodes []*Node // IsSame return whether nodes are similar without taking into account // RaftIndex fields. func (n *Node) IsSame(other *Node) bool { return n.ID == other.ID && n.Node == other.Node && n.Address == other.Address && n.Datacenter == other.Datacenter && reflect.DeepEqual(n.TaggedAddresses, other.TaggedAddresses) && reflect.DeepEqual(n.Meta, other.Meta) } // ValidateNodeMetadata validates a set of key/value pairs from the agent // config for use on a Node. func ValidateNodeMetadata(meta map[string]string, allowConsulPrefix bool) error { return validateMetadata(meta, allowConsulPrefix, nil) } // ValidateServiceMetadata validates a set of key/value pairs from the agent config for use on a Service. // ValidateMeta validates a set of key/value pairs from the agent config func ValidateServiceMetadata(kind ServiceKind, meta map[string]string, allowConsulPrefix bool) error { switch kind { case ServiceKindMeshGateway: return validateMetadata(meta, allowConsulPrefix, allowedConsulMetaKeysForMeshGateway) default: return validateMetadata(meta, allowConsulPrefix, nil) } } func validateMetadata(meta map[string]string, allowConsulPrefix bool, allowedConsulKeys map[string]struct{}) error { if len(meta) > metaMaxKeyPairs { return fmt.Errorf("Node metadata cannot contain more than %d key/value pairs", metaMaxKeyPairs) } for key, value := range meta { if err := validateMetaPair(key, value, allowConsulPrefix, allowedConsulKeys); err != nil { return fmt.Errorf("Couldn't load metadata pair ('%s', '%s'): %s", key, value, err) } } return nil } // ValidateWeights checks the definition of DNS weight is valid func ValidateWeights(weights *Weights) error { if weights == nil { return nil } if weights.Passing < 1 { return fmt.Errorf("Passing must be greater than 0") } if weights.Warning < 0 { return fmt.Errorf("Warning must be greater or equal than 0") } if weights.Passing > 65535 || weights.Warning > 65535 { return fmt.Errorf("DNS Weight must be between 0 and 65535") } return nil } // validateMetaPair checks that the given key/value pair is in a valid format func validateMetaPair(key, value string, allowConsulPrefix bool, allowedConsulKeys map[string]struct{}) error { if key == "" { return fmt.Errorf("Key cannot be blank") } if !metaKeyFormat(key) { return fmt.Errorf("Key contains invalid characters") } if len(key) > metaKeyMaxLength { return fmt.Errorf("Key is too long (limit: %d characters)", metaKeyMaxLength) } if strings.HasPrefix(key, metaKeyReservedPrefix) { if _, ok := allowedConsulKeys[key]; !allowConsulPrefix && !ok { return fmt.Errorf("Key prefix '%s' is reserved for internal use", metaKeyReservedPrefix) } } if len(value) > metaValueMaxLength { return fmt.Errorf("Value is too long (limit: %d characters)", metaValueMaxLength) } return nil } // SatisfiesMetaFilters returns true if the metadata map contains the given filters func SatisfiesMetaFilters(meta map[string]string, filters map[string]string) bool { for key, value := range filters { if v, ok := meta[key]; !ok || v != value { return false } } return true } // Used to return information about a provided services. // Maps service name to available tags type Services map[string][]string // ServiceNode represents a node that is part of a service. ID, Address, // TaggedAddresses, and NodeMeta are node-related fields that are always empty // in the state store and are filled in on the way out by parseServiceNodes(). // This is also why PartialClone() skips them, because we know they are blank // already so it would be a waste of time to copy them. type ServiceNode struct { ID types.NodeID Node string Address string Datacenter string TaggedAddresses map[string]string NodeMeta map[string]string ServiceKind ServiceKind ServiceID string ServiceName string ServiceTags []string ServiceAddress string ServiceTaggedAddresses map[string]ServiceAddress `json:",omitempty"` ServiceWeights Weights ServiceMeta map[string]string ServicePort int ServiceEnableTagOverride bool ServiceProxy ConnectProxyConfig ServiceConnect ServiceConnect EnterpriseMeta `hcl:",squash" mapstructure:",squash" bexpr:"-"` RaftIndex `bexpr:"-"` } // PartialClone() returns a clone of the given service node, minus the node- // related fields that get filled in later, Address and TaggedAddresses. func (s *ServiceNode) PartialClone() *ServiceNode { tags := make([]string, len(s.ServiceTags)) copy(tags, s.ServiceTags) nsmeta := make(map[string]string) for k, v := range s.ServiceMeta { nsmeta[k] = v } var svcTaggedAddrs map[string]ServiceAddress if len(s.ServiceTaggedAddresses) > 0 { svcTaggedAddrs = make(map[string]ServiceAddress) for k, v := range s.ServiceTaggedAddresses { svcTaggedAddrs[k] = v } } return &ServiceNode{ // Skip ID, see above. Node: s.Node, // Skip Address, see above. // Skip TaggedAddresses, see above. ServiceKind: s.ServiceKind, ServiceID: s.ServiceID, ServiceName: s.ServiceName, ServiceTags: tags, ServiceAddress: s.ServiceAddress, ServiceTaggedAddresses: svcTaggedAddrs, ServicePort: s.ServicePort, ServiceMeta: nsmeta, ServiceWeights: s.ServiceWeights, ServiceEnableTagOverride: s.ServiceEnableTagOverride, ServiceProxy: s.ServiceProxy, ServiceConnect: s.ServiceConnect, RaftIndex: RaftIndex{ CreateIndex: s.CreateIndex, ModifyIndex: s.ModifyIndex, }, EnterpriseMeta: s.EnterpriseMeta, } } // ToNodeService converts the given service node to a node service. func (s *ServiceNode) ToNodeService() *NodeService { return &NodeService{ Kind: s.ServiceKind, ID: s.ServiceID, Service: s.ServiceName, Tags: s.ServiceTags, Address: s.ServiceAddress, TaggedAddresses: s.ServiceTaggedAddresses, Port: s.ServicePort, Meta: s.ServiceMeta, Weights: &s.ServiceWeights, EnableTagOverride: s.ServiceEnableTagOverride, Proxy: s.ServiceProxy, Connect: s.ServiceConnect, EnterpriseMeta: s.EnterpriseMeta, RaftIndex: RaftIndex{ CreateIndex: s.CreateIndex, ModifyIndex: s.ModifyIndex, }, } } func (sn *ServiceNode) CompoundServiceID() ServiceID { id := sn.ServiceID if id == "" { id = sn.ServiceName } // copy the ent meta and normalize it entMeta := sn.EnterpriseMeta entMeta.Normalize() return ServiceID{ ID: id, EnterpriseMeta: entMeta, } } func (sn *ServiceNode) CompoundServiceName() ServiceName { name := sn.ServiceName if name == "" { name = sn.ServiceID } // copy the ent meta and normalize it entMeta := sn.EnterpriseMeta entMeta.Normalize() return ServiceName{ Name: name, EnterpriseMeta: entMeta, } } // Weights represent the weight used by DNS for a given status type Weights struct { Passing int Warning int } type ServiceNodes []*ServiceNode // ServiceKind is the kind of service being registered. type ServiceKind string const ( // ServiceKindTypical is a typical, classic Consul service. This is // represented by the absence of a value. This was chosen for ease of // backwards compatibility: existing services in the catalog would // default to the typical service. ServiceKindTypical ServiceKind = "" // ServiceKindConnectProxy is a proxy for the Connect feature. This // service proxies another service within Consul and speaks the connect // protocol. ServiceKindConnectProxy ServiceKind = "connect-proxy" // ServiceKindMeshGateway is a Mesh Gateway for the Connect feature. This // service will proxy connections based off the SNI header set by other // connect proxies ServiceKindMeshGateway ServiceKind = "mesh-gateway" // ServiceKindTerminatingGateway is a Terminating Gateway for the Connect // feature. This service will proxy connections to services outside the mesh. ServiceKindTerminatingGateway ServiceKind = "terminating-gateway" // ServiceKindIngressGateway is an Ingress Gateway for the Connect feature. // This service allows external traffic to enter the mesh based on // centralized configuration. ServiceKindIngressGateway ServiceKind = "ingress-gateway" ) // Type to hold a address and port of a service type ServiceAddress struct { Address string Port int } func (a ServiceAddress) ToAPIServiceAddress() api.ServiceAddress { return api.ServiceAddress{Address: a.Address, Port: a.Port} } // NodeService is a service provided by a node type NodeService struct { // Kind is the kind of service this is. Different kinds of services may // have differing validation, DNS behavior, etc. An empty kind will default // to the Default kind. See ServiceKind for the full list of kinds. Kind ServiceKind `json:",omitempty"` ID string Service string Tags []string Address string TaggedAddresses map[string]ServiceAddress `json:",omitempty"` Meta map[string]string Port int Weights *Weights EnableTagOverride bool // Proxy is the configuration set for Kind = connect-proxy. It is mandatory in // that case and an error to be set for any other kind. This config is part of // a proxy service definition. ProxyConfig may be a more natural name here, but // it's confusing for the UX because one of the fields in ConnectProxyConfig is // also called just "Config" Proxy ConnectProxyConfig // Connect are the Connect settings for a service. This is purposely NOT // a pointer so that we never have to nil-check this. Connect ServiceConnect // LocallyRegisteredAsSidecar is private as it is only used by a local agent // state to track if the service was registered from a nested sidecar_service // block. We need to track that so we can know whether we need to deregister // it automatically too if it's removed from the service definition or if the // parent service is deregistered. Relying only on ID would cause us to // deregister regular services if they happen to be registered using the same // ID scheme as our sidecars do by default. We could use meta but that gets // unpleasant because we can't use the consul- prefix from an agent (reserved // for use internally but in practice that means within the state store or in // responses only), and it leaks the detail publicly which people might rely // on which is a bit unpleasant for something that is meant to be config-file // syntax sugar. Note this is not translated to ServiceNode and friends and // may not be set on a NodeService that isn't the one the agent registered and // keeps in it's local state. We never want this rendered in JSON as it's // internal only. Right now our agent endpoints return api structs which don't // include it but this is a safety net incase we change that or there is // somewhere this is used in API output. LocallyRegisteredAsSidecar bool `json:"-" bexpr:"-"` EnterpriseMeta `hcl:",squash" mapstructure:",squash" bexpr:"-"` RaftIndex `bexpr:"-"` } func (ns *NodeService) BestAddress(wan bool) (string, int) { addr := ns.Address port := ns.Port if wan { if wan, ok := ns.TaggedAddresses[TaggedAddressWAN]; ok { addr = wan.Address if wan.Port != 0 { port = wan.Port } } } return addr, port } func (ns *NodeService) CompoundServiceID() ServiceID { id := ns.ID if id == "" { id = ns.Service } // copy the ent meta and normalize it entMeta := ns.EnterpriseMeta entMeta.Normalize() return ServiceID{ ID: id, EnterpriseMeta: entMeta, } } func (ns *NodeService) CompoundServiceName() ServiceName { name := ns.Service if name == "" { name = ns.ID } // copy the ent meta and normalize it entMeta := ns.EnterpriseMeta entMeta.Normalize() return ServiceName{ Name: name, EnterpriseMeta: entMeta, } } // UniqueID is a unique identifier for a service instance within a datacenter by encoding: // node/namespace/service_id // // Note: We do not have strict character restrictions in all node names, so this should NOT be split on / to retrieve components. func UniqueID(node string, compoundID string) string { return fmt.Sprintf("%s/%s", node, compoundID) } // ServiceConnect are the shared Connect settings between all service // definitions from the agent to the state store. type ServiceConnect struct { // Native is true when this service can natively understand Connect. Native bool `json:",omitempty"` // SidecarService is a nested Service Definition to register at the same time. // It's purely a convenience mechanism to allow specifying a sidecar service // along with the application service definition. It's nested nature allows // all of the fields to be defaulted which can reduce the amount of // boilerplate needed to register a sidecar service separately, but the end // result is identical to just making a second service registration via any // other means. SidecarService *ServiceDefinition `json:",omitempty" bexpr:"-"` } func (t *ServiceConnect) UnmarshalJSON(data []byte) (err error) { type Alias ServiceConnect aux := &struct { SidecarServiceSnake *ServiceDefinition `json:"sidecar_service"` *Alias }{ Alias: (*Alias)(t), } if err = json.Unmarshal(data, &aux); err != nil { return err } if t.SidecarService == nil && aux != nil { t.SidecarService = aux.SidecarServiceSnake } return nil } // IsSidecarProxy returns true if the NodeService is a sidecar proxy. func (s *NodeService) IsSidecarProxy() bool { return s.Kind == ServiceKindConnectProxy && s.Proxy.DestinationServiceID != "" } func (s *NodeService) IsGateway() bool { return s.Kind == ServiceKindMeshGateway || s.Kind == ServiceKindTerminatingGateway || s.Kind == ServiceKindIngressGateway } // Validate validates the node service configuration. // // NOTE(mitchellh): This currently only validates fields for a ConnectProxy. // Historically validation has been directly in the Catalog.Register RPC. // ConnectProxy validation was moved here for easier table testing, but // other validation still exists in Catalog.Register. func (s *NodeService) Validate() error { var result error // ConnectProxy validation if s.Kind == ServiceKindConnectProxy { if strings.TrimSpace(s.Proxy.DestinationServiceName) == "" { result = multierror.Append(result, fmt.Errorf( "Proxy.DestinationServiceName must be non-empty for Connect proxy "+ "services")) } if s.Port == 0 { result = multierror.Append(result, fmt.Errorf( "Port must be set for a Connect proxy")) } if s.Connect.Native { result = multierror.Append(result, fmt.Errorf( "A Proxy cannot also be Connect Native, only typical services")) } // ensure we don't have multiple upstreams for the same service var ( upstreamKeys = make(map[UpstreamKey]struct{}) bindAddrs = make(map[string]struct{}) ) for _, u := range s.Proxy.Upstreams { if err := u.Validate(); err != nil { result = multierror.Append(result, err) continue } uk := u.ToKey() if _, ok := upstreamKeys[uk]; ok { result = multierror.Append(result, fmt.Errorf( "upstreams cannot contain duplicates of %s", uk)) continue } upstreamKeys[uk] = struct{}{} addr := u.LocalBindAddress if addr == "" { addr = "127.0.0.1" } addr = net.JoinHostPort(addr, fmt.Sprintf("%d", u.LocalBindPort)) if _, ok := bindAddrs[addr]; ok { result = multierror.Append(result, fmt.Errorf( "upstreams cannot contain duplicates by local bind address and port; %q is specified twice", addr)) continue } bindAddrs[addr] = struct{}{} } var knownPaths = make(map[string]bool) var knownListeners = make(map[int]bool) for _, path := range s.Proxy.Expose.Paths { if path.Path == "" { result = multierror.Append(result, fmt.Errorf("expose.paths: empty path exposed")) } if seen := knownPaths[path.Path]; seen { result = multierror.Append(result, fmt.Errorf("expose.paths: duplicate paths exposed")) } knownPaths[path.Path] = true if seen := knownListeners[path.ListenerPort]; seen { result = multierror.Append(result, fmt.Errorf("expose.paths: duplicate listener ports exposed")) } knownListeners[path.ListenerPort] = true if path.ListenerPort <= 0 || path.ListenerPort > 65535 { result = multierror.Append(result, fmt.Errorf("expose.paths: invalid listener port: %d", path.ListenerPort)) } path.Protocol = strings.ToLower(path.Protocol) if ok := allowedExposeProtocols[path.Protocol]; !ok && path.Protocol != "" { protocols := make([]string, 0) for p := range allowedExposeProtocols { protocols = append(protocols, p) } result = multierror.Append(result, fmt.Errorf("protocol '%s' not supported for path: %s, must be in: %v", path.Protocol, path.Path, protocols)) } } } // Gateway validation if s.IsGateway() { // Non-ingress gateways must have a port if s.Port == 0 && s.Kind != ServiceKindIngressGateway { result = multierror.Append(result, fmt.Errorf("Port must be non-zero for a %s", s.Kind)) } // Gateways cannot have sidecars if s.Connect.SidecarService != nil { result = multierror.Append(result, fmt.Errorf("A %s cannot have a sidecar service defined", s.Kind)) } if s.Proxy.DestinationServiceName != "" { result = multierror.Append(result, fmt.Errorf("The Proxy.DestinationServiceName configuration is invalid for a %s", s.Kind)) } if s.Proxy.DestinationServiceID != "" { result = multierror.Append(result, fmt.Errorf("The Proxy.DestinationServiceID configuration is invalid for a %s", s.Kind)) } if s.Proxy.LocalServiceAddress != "" { result = multierror.Append(result, fmt.Errorf("The Proxy.LocalServiceAddress configuration is invalid for a %s", s.Kind)) } if s.Proxy.LocalServicePort != 0 { result = multierror.Append(result, fmt.Errorf("The Proxy.LocalServicePort configuration is invalid for a %s", s.Kind)) } if len(s.Proxy.Upstreams) != 0 { result = multierror.Append(result, fmt.Errorf("The Proxy.Upstreams configuration is invalid for a %s", s.Kind)) } } // Nested sidecar validation if s.Connect.SidecarService != nil { if s.Connect.SidecarService.ID != "" { result = multierror.Append(result, fmt.Errorf( "A SidecarService cannot specify an ID as this is managed by the "+ "agent")) } if s.Connect.SidecarService.Connect != nil { if s.Connect.SidecarService.Connect.SidecarService != nil { result = multierror.Append(result, fmt.Errorf( "A SidecarService cannot have a nested SidecarService")) } } } return result } // IsSame checks if one NodeService is the same as another, without looking // at the Raft information (that's why we didn't call it IsEqual). This is // useful for seeing if an update would be idempotent for all the functional // parts of the structure. func (s *NodeService) IsSame(other *NodeService) bool { if s.ID != other.ID || s.Service != other.Service || !reflect.DeepEqual(s.Tags, other.Tags) || s.Address != other.Address || s.Port != other.Port || !reflect.DeepEqual(s.TaggedAddresses, other.TaggedAddresses) || !reflect.DeepEqual(s.Weights, other.Weights) || !reflect.DeepEqual(s.Meta, other.Meta) || s.EnableTagOverride != other.EnableTagOverride || s.Kind != other.Kind || !reflect.DeepEqual(s.Proxy, other.Proxy) || s.Connect != other.Connect || !s.EnterpriseMeta.IsSame(&other.EnterpriseMeta) { return false } return true } // IsSameService checks if one Service of a ServiceNode is the same as another, // without looking at the Raft information or Node information (that's why we // didn't call it IsEqual). // This is useful for seeing if an update would be idempotent for all the functional // parts of the structure. // In a similar fashion as ToNodeService(), fields related to Node are ignored // see ServiceNode for more information. func (s *ServiceNode) IsSameService(other *ServiceNode) bool { // Skip the following fields, see ServiceNode definition // Address string // Datacenter string // TaggedAddresses map[string]string // NodeMeta map[string]string if s.ID != other.ID || s.Node != other.Node || s.ServiceKind != other.ServiceKind || s.ServiceID != other.ServiceID || s.ServiceName != other.ServiceName || !reflect.DeepEqual(s.ServiceTags, other.ServiceTags) || s.ServiceAddress != other.ServiceAddress || !reflect.DeepEqual(s.ServiceTaggedAddresses, other.ServiceTaggedAddresses) || s.ServicePort != other.ServicePort || !reflect.DeepEqual(s.ServiceMeta, other.ServiceMeta) || !reflect.DeepEqual(s.ServiceWeights, other.ServiceWeights) || s.ServiceEnableTagOverride != other.ServiceEnableTagOverride || !reflect.DeepEqual(s.ServiceProxy, other.ServiceProxy) || !reflect.DeepEqual(s.ServiceConnect, other.ServiceConnect) || !s.EnterpriseMeta.IsSame(&other.EnterpriseMeta) { return false } return true } // ToServiceNode converts the given node service to a service node. func (s *NodeService) ToServiceNode(node string) *ServiceNode { theWeights := Weights{ Passing: 1, Warning: 1, } if s.Weights != nil { if err := ValidateWeights(s.Weights); err == nil { theWeights = *s.Weights } } return &ServiceNode{ // Skip ID, see ServiceNode definition. Node: node, // Skip Address, see ServiceNode definition. // Skip TaggedAddresses, see ServiceNode definition. ServiceKind: s.Kind, ServiceID: s.ID, ServiceName: s.Service, ServiceTags: s.Tags, ServiceAddress: s.Address, ServiceTaggedAddresses: s.TaggedAddresses, ServicePort: s.Port, ServiceMeta: s.Meta, ServiceWeights: theWeights, ServiceEnableTagOverride: s.EnableTagOverride, ServiceProxy: s.Proxy, ServiceConnect: s.Connect, EnterpriseMeta: s.EnterpriseMeta, RaftIndex: RaftIndex{ CreateIndex: s.CreateIndex, ModifyIndex: s.ModifyIndex, }, } } type NodeServices struct { Node *Node Services map[string]*NodeService } type NodeServiceList struct { Node *Node Services []*NodeService } // HealthCheck represents a single check on a given node type HealthCheck struct { Node string CheckID types.CheckID // Unique per-node ID Name string // Check name Status string // The current check status Notes string // Additional notes with the status Output string // Holds output of script runs ServiceID string // optional associated service ServiceName string // optional service name ServiceTags []string // optional service tags Type string // Check type: http/ttl/tcp/etc Definition HealthCheckDefinition `bexpr:"-"` EnterpriseMeta `hcl:",squash" mapstructure:",squash" bexpr:"-"` RaftIndex `bexpr:"-"` } func (hc *HealthCheck) CompoundServiceID() ServiceID { id := hc.ServiceID if id == "" { id = hc.ServiceName } entMeta := hc.EnterpriseMeta entMeta.Normalize() return ServiceID{ ID: id, EnterpriseMeta: entMeta, } } func (hc *HealthCheck) CompoundCheckID() CheckID { entMeta := hc.EnterpriseMeta entMeta.Normalize() return CheckID{ ID: hc.CheckID, EnterpriseMeta: entMeta, } } type HealthCheckDefinition struct { HTTP string `json:",omitempty"` TLSSkipVerify bool `json:",omitempty"` Header map[string][]string `json:",omitempty"` Method string `json:",omitempty"` Body string `json:",omitempty"` TCP string `json:",omitempty"` Interval time.Duration `json:",omitempty"` OutputMaxSize uint `json:",omitempty"` Timeout time.Duration `json:",omitempty"` DeregisterCriticalServiceAfter time.Duration `json:",omitempty"` ScriptArgs []string `json:",omitempty"` DockerContainerID string `json:",omitempty"` Shell string `json:",omitempty"` GRPC string `json:",omitempty"` GRPCUseTLS bool `json:",omitempty"` AliasNode string `json:",omitempty"` AliasService string `json:",omitempty"` TTL time.Duration `json:",omitempty"` } func (d *HealthCheckDefinition) MarshalJSON() ([]byte, error) { type Alias HealthCheckDefinition exported := &struct { Interval string `json:",omitempty"` OutputMaxSize uint `json:",omitempty"` Timeout string `json:",omitempty"` DeregisterCriticalServiceAfter string `json:",omitempty"` *Alias }{ Interval: d.Interval.String(), OutputMaxSize: d.OutputMaxSize, Timeout: d.Timeout.String(), DeregisterCriticalServiceAfter: d.DeregisterCriticalServiceAfter.String(), Alias: (*Alias)(d), } if d.Interval == 0 { exported.Interval = "" } if d.Timeout == 0 { exported.Timeout = "" } if d.DeregisterCriticalServiceAfter == 0 { exported.DeregisterCriticalServiceAfter = "" } return json.Marshal(exported) } func (t *HealthCheckDefinition) UnmarshalJSON(data []byte) (err error) { type Alias HealthCheckDefinition aux := &struct { Interval interface{} Timeout interface{} DeregisterCriticalServiceAfter interface{} TTL interface{} *Alias }{ Alias: (*Alias)(t), } if err := json.Unmarshal(data, &aux); err != nil { return err } if aux.Interval != nil { switch v := aux.Interval.(type) { case string: if t.Interval, err = time.ParseDuration(v); err != nil { return err } case float64: t.Interval = time.Duration(v) } } if aux.Timeout != nil { switch v := aux.Timeout.(type) { case string: if t.Timeout, err = time.ParseDuration(v); err != nil { return err } case float64: t.Timeout = time.Duration(v) } } if aux.DeregisterCriticalServiceAfter != nil { switch v := aux.DeregisterCriticalServiceAfter.(type) { case string: if t.DeregisterCriticalServiceAfter, err = time.ParseDuration(v); err != nil { return err } case float64: t.DeregisterCriticalServiceAfter = time.Duration(v) } } if aux.TTL != nil { switch v := aux.TTL.(type) { case string: if t.TTL, err = time.ParseDuration(v); err != nil { return err } case float64: t.TTL = time.Duration(v) } } return nil } // IsSame checks if one HealthCheck is the same as another, without looking // at the Raft information (that's why we didn't call it IsEqual). This is // useful for seeing if an update would be idempotent for all the functional // parts of the structure. func (c *HealthCheck) IsSame(other *HealthCheck) bool { if c.Node != other.Node || c.CheckID != other.CheckID || c.Name != other.Name || c.Status != other.Status || c.Notes != other.Notes || c.Output != other.Output || c.ServiceID != other.ServiceID || c.ServiceName != other.ServiceName || !reflect.DeepEqual(c.ServiceTags, other.ServiceTags) || !reflect.DeepEqual(c.Definition, other.Definition) || !c.EnterpriseMeta.IsSame(&other.EnterpriseMeta) { return false } return true } // Clone returns a distinct clone of the HealthCheck. Note that the // "ServiceTags" and "Definition.Header" field are not deep copied. func (c *HealthCheck) Clone() *HealthCheck { clone := new(HealthCheck) *clone = *c return clone } func (c *HealthCheck) CheckType() *CheckType { return &CheckType{ CheckID: c.CheckID, Name: c.Name, Status: c.Status, Notes: c.Notes, ScriptArgs: c.Definition.ScriptArgs, AliasNode: c.Definition.AliasNode, AliasService: c.Definition.AliasService, HTTP: c.Definition.HTTP, GRPC: c.Definition.GRPC, GRPCUseTLS: c.Definition.GRPCUseTLS, Header: c.Definition.Header, Method: c.Definition.Method, Body: c.Definition.Body, TCP: c.Definition.TCP, Interval: c.Definition.Interval, DockerContainerID: c.Definition.DockerContainerID, Shell: c.Definition.Shell, TLSSkipVerify: c.Definition.TLSSkipVerify, Timeout: c.Definition.Timeout, TTL: c.Definition.TTL, DeregisterCriticalServiceAfter: c.Definition.DeregisterCriticalServiceAfter, } } // HealthChecks is a collection of HealthCheck structs. type HealthChecks []*HealthCheck // CheckServiceNode is used to provide the node, its service // definition, as well as a HealthCheck that is associated. type CheckServiceNode struct { Node *Node Service *NodeService Checks HealthChecks } func (csn *CheckServiceNode) BestAddress(wan bool) (string, int) { // TODO (mesh-gateway) needs a test // best address // wan // wan svc addr // svc addr // wan node addr // node addr // lan // svc addr // node addr addr, port := csn.Service.BestAddress(wan) if addr == "" { addr = csn.Node.BestAddress(wan) } return addr, port } type CheckServiceNodes []CheckServiceNode // Shuffle does an in-place random shuffle using the Fisher-Yates algorithm. func (nodes CheckServiceNodes) Shuffle() { for i := len(nodes) - 1; i > 0; i-- { j := rand.Int31n(int32(i + 1)) nodes[i], nodes[j] = nodes[j], nodes[i] } } func (nodes CheckServiceNodes) ToServiceDump() ServiceDump { var ret ServiceDump for i := range nodes { svc := ServiceInfo{ Node: nodes[i].Node, Service: nodes[i].Service, Checks: nodes[i].Checks, GatewayService: nil, } ret = append(ret, &svc) } return ret } // ShallowClone duplicates the slice and underlying array. func (nodes CheckServiceNodes) ShallowClone() CheckServiceNodes { dup := make(CheckServiceNodes, len(nodes)) copy(dup, nodes) return dup } // Filter removes nodes that are failing health checks (and any non-passing // check if that option is selected). Note that this returns the filtered // results AND modifies the receiver for performance. func (nodes CheckServiceNodes) Filter(onlyPassing bool) CheckServiceNodes { return nodes.FilterIgnore(onlyPassing, nil) } // FilterIgnore removes nodes that are failing health checks just like Filter. // It also ignores the status of any check with an ID present in ignoreCheckIDs // as if that check didn't exist. Note that this returns the filtered results // AND modifies the receiver for performance. func (nodes CheckServiceNodes) FilterIgnore(onlyPassing bool, ignoreCheckIDs []types.CheckID) CheckServiceNodes { n := len(nodes) OUTER: for i := 0; i < n; i++ { node := nodes[i] INNER: for _, check := range node.Checks { for _, ignore := range ignoreCheckIDs { if check.CheckID == ignore { // Skip this _check_ but keep looking at other checks for this node. continue INNER } } if check.Status == api.HealthCritical || (onlyPassing && check.Status != api.HealthPassing) { nodes[i], nodes[n-1] = nodes[n-1], CheckServiceNode{} n-- i-- // Skip this _node_ now we've swapped it off the end of the list. continue OUTER } } } return nodes[:n] } // NodeInfo is used to dump all associated information about // a node. This is currently used for the UI only, as it is // rather expensive to generate. type NodeInfo struct { ID types.NodeID Node string Address string TaggedAddresses map[string]string Meta map[string]string Services []*NodeService Checks HealthChecks } // NodeDump is used to dump all the nodes with all their // associated data. This is currently used for the UI only, // as it is rather expensive to generate. type NodeDump []*NodeInfo type ServiceInfo struct { Node *Node Service *NodeService Checks HealthChecks GatewayService *GatewayService } type ServiceDump []*ServiceInfo type CheckID struct { ID types.CheckID EnterpriseMeta } func NewCheckID(id types.CheckID, entMeta *EnterpriseMeta) CheckID { var cid CheckID cid.ID = id if entMeta == nil { entMeta = DefaultEnterpriseMeta() } cid.EnterpriseMeta = *entMeta cid.EnterpriseMeta.Normalize() return cid } // StringHash is used mainly to populate part of the filename of a check // definition persisted on the local agent func (cid *CheckID) StringHash() string { hasher := md5.New() hasher.Write([]byte(cid.ID)) cid.EnterpriseMeta.addToHash(hasher, true) return fmt.Sprintf("%x", hasher.Sum(nil)) } type ServiceID struct { ID string EnterpriseMeta } func NewServiceID(id string, entMeta *EnterpriseMeta) ServiceID { var sid ServiceID sid.ID = id if entMeta == nil { entMeta = DefaultEnterpriseMeta() } sid.EnterpriseMeta = *entMeta sid.EnterpriseMeta.Normalize() return sid } func (sid *ServiceID) Matches(other *ServiceID) bool { if sid == nil && other == nil { return true } if sid == nil || other == nil || sid.ID != other.ID || !sid.EnterpriseMeta.Matches(&other.EnterpriseMeta) { return false } return true } // StringHash is used mainly to populate part of the filename of a service // definition persisted on the local agent func (sid *ServiceID) StringHash() string { hasher := md5.New() hasher.Write([]byte(sid.ID)) sid.EnterpriseMeta.addToHash(hasher, true) return fmt.Sprintf("%x", hasher.Sum(nil)) } func (sid *ServiceID) LessThan(other *ServiceID) bool { if sid.EnterpriseMeta.LessThan(&other.EnterpriseMeta) { return true } return sid.ID < other.ID } type IndexedNodes struct { Nodes Nodes QueryMeta } type IndexedServices struct { Services Services // In various situations we need to know the meta that the services are for - in particular // this is needed to be able to properly filter the list based on ACLs EnterpriseMeta QueryMeta } type ServiceName struct { Name string EnterpriseMeta } func NewServiceName(name string, entMeta *EnterpriseMeta) ServiceName { var ret ServiceName ret.Name = name if entMeta == nil { entMeta = DefaultEnterpriseMeta() } ret.EnterpriseMeta = *entMeta ret.EnterpriseMeta.Normalize() return ret } func (n *ServiceName) Matches(o *ServiceName) bool { if n == nil && o == nil { return true } if n == nil || o == nil || n.Name != o.Name || !n.EnterpriseMeta.Matches(&o.EnterpriseMeta) { return false } return true } func (n *ServiceName) ToServiceID() ServiceID { return ServiceID{ID: n.Name, EnterpriseMeta: n.EnterpriseMeta} } func (n *ServiceName) LessThan(other *ServiceName) bool { if n.EnterpriseMeta.LessThan(&other.EnterpriseMeta) { return true } return n.Name < other.Name } type ServiceList []ServiceName type IndexedServiceList struct { Services ServiceList QueryMeta } type IndexedServiceNodes struct { ServiceNodes ServiceNodes QueryMeta } type IndexedNodeServices struct { // TODO: This should not be a pointer, see comments in // agent/catalog_endpoint.go. NodeServices *NodeServices QueryMeta } type IndexedNodeServiceList struct { NodeServices NodeServiceList QueryMeta } type IndexedHealthChecks struct { HealthChecks HealthChecks QueryMeta } type IndexedCheckServiceNodes struct { Nodes CheckServiceNodes QueryMeta } type IndexedNodesWithGateways struct { Nodes CheckServiceNodes Gateways GatewayServices QueryMeta } type DatacenterIndexedCheckServiceNodes struct { DatacenterNodes map[string]CheckServiceNodes QueryMeta } type IndexedNodeDump struct { Dump NodeDump QueryMeta } type IndexedServiceDump struct { Dump ServiceDump QueryMeta } type IndexedGatewayServices struct { Services GatewayServices QueryMeta } type IndexedServiceTopology struct { ServiceTopology *ServiceTopology FilteredByACLs bool QueryMeta } type ServiceTopology struct { Upstreams CheckServiceNodes Downstreams CheckServiceNodes } // IndexedConfigEntries has its own encoding logic which differs from // ConfigEntryRequest as it has to send a slice of ConfigEntry. type IndexedConfigEntries struct { Kind string Entries []ConfigEntry QueryMeta } func (c *IndexedConfigEntries) MarshalBinary() (data []byte, err error) { // bs will grow if needed but allocate enough to avoid reallocation in common // case. bs := make([]byte, 128) enc := codec.NewEncoderBytes(&bs, MsgpackHandle) // Encode length. err = enc.Encode(len(c.Entries)) if err != nil { return nil, err } // Encode kind. err = enc.Encode(c.Kind) if err != nil { return nil, err } // Then actual value using alias trick to avoid infinite recursion type Alias IndexedConfigEntries err = enc.Encode(struct { *Alias }{ Alias: (*Alias)(c), }) if err != nil { return nil, err } return bs, nil } func (c *IndexedConfigEntries) UnmarshalBinary(data []byte) error { // First decode the number of entries. var numEntries int dec := codec.NewDecoderBytes(data, MsgpackHandle) if err := dec.Decode(&numEntries); err != nil { return err } // Next decode the kind. var kind string if err := dec.Decode(&kind); err != nil { return err } // Then decode the slice of ConfigEntries c.Entries = make([]ConfigEntry, numEntries) for i := 0; i < numEntries; i++ { entry, err := MakeConfigEntry(kind, "") if err != nil { return err } c.Entries[i] = entry } // Alias juggling to prevent infinite recursive calls back to this decode // method. type Alias IndexedConfigEntries as := struct { *Alias }{ Alias: (*Alias)(c), } if err := dec.Decode(&as); err != nil { return err } return nil } type IndexedGenericConfigEntries struct { Entries []ConfigEntry QueryMeta } func (c *IndexedGenericConfigEntries) MarshalBinary() (data []byte, err error) { // bs will grow if needed but allocate enough to avoid reallocation in common // case. bs := make([]byte, 128) enc := codec.NewEncoderBytes(&bs, MsgpackHandle) if err := enc.Encode(len(c.Entries)); err != nil { return nil, err } for _, entry := range c.Entries { if err := enc.Encode(entry.GetKind()); err != nil { return nil, err } if err := enc.Encode(entry); err != nil { return nil, err } } if err := enc.Encode(c.QueryMeta); err != nil { return nil, err } return bs, nil } func (c *IndexedGenericConfigEntries) UnmarshalBinary(data []byte) error { // First decode the number of entries. var numEntries int dec := codec.NewDecoderBytes(data, MsgpackHandle) if err := dec.Decode(&numEntries); err != nil { return err } // Then decode the slice of ConfigEntries c.Entries = make([]ConfigEntry, numEntries) for i := 0; i < numEntries; i++ { var kind string if err := dec.Decode(&kind); err != nil { return err } entry, err := MakeConfigEntry(kind, "") if err != nil { return err } if err := dec.Decode(entry); err != nil { return err } c.Entries[i] = entry } if err := dec.Decode(&c.QueryMeta); err != nil { return err } return nil } // DirEntry is used to represent a directory entry. This is // used for values in our Key-Value store. type DirEntry struct { LockIndex uint64 Key string Flags uint64 Value []byte Session string `json:",omitempty"` EnterpriseMeta `bexpr:"-"` RaftIndex } // Returns a clone of the given directory entry. func (d *DirEntry) Clone() *DirEntry { return &DirEntry{ LockIndex: d.LockIndex, Key: d.Key, Flags: d.Flags, Value: d.Value, Session: d.Session, RaftIndex: RaftIndex{ CreateIndex: d.CreateIndex, ModifyIndex: d.ModifyIndex, }, EnterpriseMeta: d.EnterpriseMeta, } } func (d *DirEntry) Equal(o *DirEntry) bool { return d.LockIndex == o.LockIndex && d.Key == o.Key && d.Flags == o.Flags && bytes.Equal(d.Value, o.Value) && d.Session == o.Session } type DirEntries []*DirEntry // KVSRequest is used to operate on the Key-Value store type KVSRequest struct { Datacenter string Op api.KVOp // Which operation are we performing DirEnt DirEntry // Which directory entry WriteRequest } func (r *KVSRequest) RequestDatacenter() string { return r.Datacenter } // KeyRequest is used to request a key, or key prefix type KeyRequest struct { Datacenter string Key string EnterpriseMeta QueryOptions } func (r *KeyRequest) RequestDatacenter() string { return r.Datacenter } // KeyListRequest is used to list keys type KeyListRequest struct { Datacenter string Prefix string Seperator string QueryOptions EnterpriseMeta } func (r *KeyListRequest) RequestDatacenter() string { return r.Datacenter } type IndexedDirEntries struct { Entries DirEntries QueryMeta } type IndexedKeyList struct { Keys []string QueryMeta } type SessionBehavior string const ( SessionKeysRelease SessionBehavior = "release" SessionKeysDelete = "delete" ) const ( SessionTTLMax = 24 * time.Hour SessionTTLMultiplier = 2 ) type Sessions []*Session // Session is used to represent an open session in the KV store. // This issued to associate node checks with acquired locks. type Session struct { ID string Name string Node string LockDelay time.Duration Behavior SessionBehavior // What to do when session is invalidated TTL string NodeChecks []string ServiceChecks []ServiceCheck // Deprecated v1.7.0. Checks []types.CheckID `json:",omitempty"` EnterpriseMeta RaftIndex } type ServiceCheck struct { ID string Namespace string } func (s *Session) UnmarshalJSON(data []byte) (err error) { type Alias Session aux := &struct { LockDelay interface{} *Alias }{ Alias: (*Alias)(s), } if err = json.Unmarshal(data, &aux); err != nil { return err } if aux.LockDelay != nil { var dur time.Duration switch v := aux.LockDelay.(type) { case string: if dur, err = time.ParseDuration(v); err != nil { return err } case float64: dur = time.Duration(v) } // Convert low value integers into seconds if dur < lockDelayMinThreshold { dur = dur * time.Second } s.LockDelay = dur } return nil } type SessionOp string const ( SessionCreate SessionOp = "create" SessionDestroy = "destroy" ) // SessionRequest is used to operate on sessions type SessionRequest struct { Datacenter string Op SessionOp // Which operation are we performing Session Session // Which session WriteRequest } func (r *SessionRequest) RequestDatacenter() string { return r.Datacenter } // SessionSpecificRequest is used to request a session by ID type SessionSpecificRequest struct { Datacenter string SessionID string // DEPRECATED in 1.7.0 Session string EnterpriseMeta QueryOptions } func (r *SessionSpecificRequest) RequestDatacenter() string { return r.Datacenter } type IndexedSessions struct { Sessions Sessions QueryMeta } // Coordinate stores a node name with its associated network coordinate. type Coordinate struct { Node string Segment string Coord *coordinate.Coordinate } type Coordinates []*Coordinate // IndexedCoordinate is used to represent a single node's coordinate from the state // store. type IndexedCoordinate struct { Coord *coordinate.Coordinate QueryMeta } // IndexedCoordinates is used to represent a list of nodes and their // corresponding raw coordinates. type IndexedCoordinates struct { Coordinates Coordinates QueryMeta } // DatacenterMap is used to represent a list of nodes with their raw coordinates, // associated with a datacenter. Coordinates are only compatible between nodes in // the same area. type DatacenterMap struct { Datacenter string AreaID types.AreaID Coordinates Coordinates } // CoordinateUpdateRequest is used to update the network coordinate of a given // node. type CoordinateUpdateRequest struct { Datacenter string Node string Segment string Coord *coordinate.Coordinate WriteRequest } // RequestDatacenter returns the datacenter for a given update request. func (c *CoordinateUpdateRequest) RequestDatacenter() string { return c.Datacenter } // EventFireRequest is used to ask a server to fire // a Serf event. It is a bit odd, since it doesn't depend on // the catalog or leader. Any node can respond, so it's not quite // like a standard write request. This is used only internally. type EventFireRequest struct { Datacenter string Name string Payload []byte // Not using WriteRequest so that any server can process // the request. It is a bit unusual... QueryOptions } func (r *EventFireRequest) RequestDatacenter() string { return r.Datacenter } // EventFireResponse is used to respond to a fire request. type EventFireResponse struct { QueryMeta } type TombstoneOp string const ( TombstoneReap TombstoneOp = "reap" ) // TombstoneRequest is used to trigger a reaping of the tombstones type TombstoneRequest struct { Datacenter string Op TombstoneOp ReapIndex uint64 WriteRequest } func (r *TombstoneRequest) RequestDatacenter() string { return r.Datacenter } // MsgpackHandle is a shared handle for encoding/decoding msgpack payloads var MsgpackHandle = &codec.MsgpackHandle{ RawToString: true, BasicHandle: codec.BasicHandle{ DecodeOptions: codec.DecodeOptions{ MapType: reflect.TypeOf(map[string]interface{}{}), }, }, } // 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 } type ProtoMarshaller interface { Size() int MarshalTo([]byte) (int, error) Unmarshal([]byte) error ProtoMessage() } func EncodeProtoInterface(t MessageType, message interface{}) ([]byte, error) { if marshaller, ok := message.(ProtoMarshaller); ok { return EncodeProto(t, marshaller) } return nil, fmt.Errorf("message does not implement the ProtoMarshaller interface: %T", message) } func EncodeProto(t MessageType, message ProtoMarshaller) ([]byte, error) { data := make([]byte, message.Size()+1) data[0] = uint8(t) if _, err := message.MarshalTo(data[1:]); err != nil { return nil, err } return data, nil } func DecodeProto(buf []byte, out ProtoMarshaller) error { // Note that this assumes the leading byte indicating the type as already been stripped off. return out.Unmarshal(buf) } // CompoundResponse is an interface for gathering multiple responses. It is // used in cross-datacenter RPC calls where more than 1 datacenter is // expected to reply. type CompoundResponse interface { // Add adds a new response to the compound response Add(interface{}) // New returns an empty response object which can be passed around by // reference, and then passed to Add() later on. New() interface{} } type KeyringOp string const ( KeyringList KeyringOp = "list" KeyringInstall = "install" KeyringUse = "use" KeyringRemove = "remove" ) // KeyringRequest encapsulates a request to modify an encryption keyring. // It can be used for install, remove, or use key type operations. type KeyringRequest struct { Operation KeyringOp Key string Datacenter string Forwarded bool RelayFactor uint8 LocalOnly bool QueryOptions } func (r *KeyringRequest) RequestDatacenter() string { return r.Datacenter } // KeyringResponse is a unified key response and can be used for install, // remove, use, as well as listing key queries. type KeyringResponse struct { WAN bool Datacenter string Segment string Messages map[string]string `json:",omitempty"` Keys map[string]int PrimaryKeys map[string]int NumNodes int Error string `json:",omitempty"` } // KeyringResponses holds multiple responses to keyring queries. Each // datacenter replies independently, and KeyringResponses is used as a // container for the set of all responses. type KeyringResponses struct { Responses []*KeyringResponse QueryMeta } func (r *KeyringResponses) Add(v interface{}) { val := v.(*KeyringResponses) r.Responses = append(r.Responses, val.Responses...) } func (r *KeyringResponses) New() interface{} { return new(KeyringResponses) } // UpstreamDownstream pairs come from individual proxy registrations, which can be updated independently. type UpstreamDownstream struct { Upstream ServiceName Downstream ServiceName // Refs stores the registrations that contain this pairing. // When there are no remaining Refs, the UpstreamDownstream can be deleted. // // Note: This map must be treated as immutable when accessed in MemDB. // The entire UpstreamDownstream structure must be deep copied on updates. Refs map[string]struct{} RaftIndex }