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open-nomad/client/allocrunner/config.go

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allocrunnerv2 -> allocrunner
2018-10-04 23:22:01 +00:00
package allocrunner
Initial V2 alloc runner
2018-06-22 00:35:07 +00:00
import (
log "github.com/hashicorp/go-hclog"
implement stopping, destroying, and disk migration * Stopping an alloc is implemented via Updates but update hooks are *not* run. * Destroying an alloc is a best effort cleanup. * AllocRunner destroy hooks implemented. * Disk migration and blocking on a previous allocation exiting moved to its own package to avoid cycles. Now only depends on alloc broadcaster instead of also using a waitch. * AllocBroadcaster now only drops stale allocations and always keeps the latest version. * Made AllocDir safe for concurrent use Lots of internal contexts that are currently unused. Unsure if they should be used or removed.
2018-08-23 19:03:17 +00:00
"github.com/hashicorp/nomad/client/allocwatcher"
Initial V2 alloc runner
2018-06-22 00:35:07 +00:00
clientconfig "github.com/hashicorp/nomad/client/config"
consul service hook Deregistration works but difficult to test due to terminal updates not being fully implemented in the new client/ar/tr.
2018-07-20 00:40:25 +00:00
"github.com/hashicorp/nomad/client/consul"
Device hook and devices affect computed node class This PR introduces a device hook that retrieves the device mount information for an allocation. It also updates the computed node class computation to take into account devices. TODO Fix the task runner unit test. The environment variable is being lost even though it is being properly set in the prestart hook.
2018-11-16 23:29:59 +00:00
"github.com/hashicorp/nomad/client/devicemanager"
CSI Plugin Registration (#6555) This changeset implements the initial registration and fingerprinting of CSI Plugins as part of #5378. At a high level, it introduces the following: * A `csi_plugin` stanza as part of a Nomad task configuration, to allow a task to expose that it is a plugin. * A new task runner hook: `csi_plugin_supervisor`. This hook does two things. When the `csi_plugin` stanza is detected, it will automatically configure the plugin task to receive bidirectional mounts to the CSI intermediary directory. At runtime, it will then perform an initial heartbeat of the plugin and handle submitting it to the new `dynamicplugins.Registry` for further use by the client, and then run a lightweight heartbeat loop that will emit task events when health changes. * The `dynamicplugins.Registry` for handling plugins that run as Nomad tasks, in contrast to the existing catalog that requires `go-plugin` type plugins and to know the plugin configuration in advance. * The `csimanager` which fingerprints CSI plugins, in a similar way to `drivermanager` and `devicemanager`. It currently only fingerprints the NodeID from the plugin, and assumes that all plugins are monolithic. Missing features * We do not use the live updates of the `dynamicplugin` registry in the `csimanager` yet. * We do not deregister the plugins from the client when they shutdown yet, they just become indefinitely marked as unhealthy. This is deliberate until we figure out how we should manage deploying new versions of plugins/transitioning them.
2019-10-22 13:20:26 +00:00
"github.com/hashicorp/nomad/client/dynamicplugins"
Update state with server
2018-07-19 00:06:44 +00:00
"github.com/hashicorp/nomad/client/interfaces"
csi: Add VolumeManager (#6920) This changeset is some pre-requisite boilerplate that is required for introducing CSI volume management for client nodes. It extracts out fingerprinting logic from the csi instance manager. This change is to facilitate reusing the csimanager to also manage the node-local CSI functionality, as it is the easiest place for us to guaruntee health checking and to provide additional visibility into the running operations through the fingerprinter mechanism and goroutine. It also introduces the VolumeMounter interface that will be used to manage staging/publishing unstaging/unpublishing of volumes on the host.
2020-01-08 12:47:07 +00:00
"github.com/hashicorp/nomad/client/pluginmanager/csimanager"
client/drivermananger: add driver manager The driver manager is modeled after the device manager and is started by the client. It's responsible for handling driver lifecycle and reattachment state, as well as processing the incomming fingerprint and task events from each driver. The mananger exposes a method for registering event handlers for task events that is used by the task runner to update the server when a task has been updated with an event. Since driver fingerprinting has been implemented by the driver manager, it is no longer needed in the fingerprint mananger and has been removed.
2018-11-28 03:42:22 +00:00
"github.com/hashicorp/nomad/client/pluginmanager/drivermanager"
implement all boltdb interactions behind StateDB
2018-08-08 00:46:37 +00:00
cstate "github.com/hashicorp/nomad/client/state"
vault hook
2018-07-12 23:15:33 +00:00
"github.com/hashicorp/nomad/client/vaultclient"
Initial V2 alloc runner
2018-06-22 00:35:07 +00:00
"github.com/hashicorp/nomad/nomad/structs"
)
// Config holds the configuration for creating an allocation runner.
type Config struct {
// Logger is the logger for the allocation runner.
Logger log.Logger
// ClientConfig is the clients configuration.
ClientConfig *clientconfig.Config
example redis job "runs" on arv2! see below Tons left to do and lots of churn: 1. No state saving 2. No shutdown or gc 3. Removed AR factory *for now* 4. Made all "Config" structs local to the package they configure 5. Added allocID to GC to avoid a lookup Really hating how many things use *structs.Allocation. It's not bad without state saving, but if AllocRunner starts updating its copy things get racy fast.
2018-06-29 00:01:05 +00:00
// Alloc captures the allocation that should be run.
Alloc *structs.Allocation
Initial V2 alloc runner
2018-06-22 00:35:07 +00:00
// StateDB is used to store and restore state.
implement all boltdb interactions behind StateDB
2018-08-08 00:46:37 +00:00
StateDB cstate.StateDB
Initial V2 alloc runner
2018-06-22 00:35:07 +00:00
consul service hook Deregistration works but difficult to test due to terminal updates not being fully implemented in the new client/ar/tr.
2018-07-20 00:40:25 +00:00
// Consul is the Consul client used to register task services and checks
Consul consul.ConsulServiceAPI
client: enable nomad client to request and set SI tokens for tasks When a job is configured with Consul Connect aware tasks (i.e. sidecar), the Nomad Client should be able to request from Consul (through Nomad Server) Service Identity tokens specific to those tasks.
2019-11-27 21:41:45 +00:00
// ConsulSI is the Consul client used to manage service identity tokens.
ConsulSI consul.ServiceIdentityAPI
vault hook
2018-07-12 23:15:33 +00:00
// Vault is the Vault client to use to retrieve Vault tokens
Vault vaultclient.VaultClient
Update state with server
2018-07-19 00:06:44 +00:00
// StateUpdater is used to emit updated task state
StateUpdater interfaces.AllocStateHandler
implement stopping, destroying, and disk migration * Stopping an alloc is implemented via Updates but update hooks are *not* run. * Destroying an alloc is a best effort cleanup. * AllocRunner destroy hooks implemented. * Disk migration and blocking on a previous allocation exiting moved to its own package to avoid cycles. Now only depends on alloc broadcaster instead of also using a waitch. * AllocBroadcaster now only drops stale allocations and always keeps the latest version. * Made AllocDir safe for concurrent use Lots of internal contexts that are currently unused. Unsure if they should be used or removed.
2018-08-23 19:03:17 +00:00
client: Unify handling of previous and preempted allocs
2018-12-06 11:15:59 +00:00
// DeviceStatsReporter is used to lookup resource usage for alloc devices
Populate alloc stats API with device stats This change makes few compromises: * Looks up the devices associated with tasks at look up time. Given that `nomad alloc status` is called rarely generally (compared to stats telemetry and general job reporting), it seems fine. However, the lookup overhead grows bounded by number of `tasks x total-host-devices`, which can be significant. * `client.Client` performs the task devices->statistics lookup. It passes self to alloc/task runners so they can look up the device statistics allocated to them. * Currently alloc/task runners are responsible for constructing the entire RPC response for stats * The alternatives for making task runners device statistics aware don't seem appealing (e.g. having task runners contain reference to hostStats) * On the alloc aggregation resource usage, I did a naive merging of task device statistics. * Personally, I question the value of such aggregation, compared to costs of struct duplication and bloating the response - but opted to be consistent in the API. * With naive concatination, device instances from a single device group used by separate tasks in the alloc, would be aggregated in two separate device group statistics.
2018-11-15 15:13:14 +00:00
DeviceStatsReporter interfaces.DeviceStatsReporter
client: Unify handling of previous and preempted allocs
2018-12-06 11:15:59 +00:00
// PrevAllocWatcher handles waiting on previous or preempted allocations
implement stopping, destroying, and disk migration * Stopping an alloc is implemented via Updates but update hooks are *not* run. * Destroying an alloc is a best effort cleanup. * AllocRunner destroy hooks implemented. * Disk migration and blocking on a previous allocation exiting moved to its own package to avoid cycles. Now only depends on alloc broadcaster instead of also using a waitch. * AllocBroadcaster now only drops stale allocations and always keeps the latest version. * Made AllocDir safe for concurrent use Lots of internal contexts that are currently unused. Unsure if they should be used or removed.
2018-08-23 19:03:17 +00:00
PrevAllocWatcher allocwatcher.PrevAllocWatcher
client: begin driver plugin integration client: fingerprint driver plugins
2018-10-04 19:08:20 +00:00
client: Unify handling of previous and preempted allocs
2018-12-06 11:15:59 +00:00
// PrevAllocMigrator allows the migration of a previous allocations alloc dir
PrevAllocMigrator allocwatcher.PrevAllocMigrator
client: Wait for preempted allocs to terminate When starting an allocation that is preempting other allocs, we create a new group allocation watcher, and then wait for the allocations to terminate in the allocation PreRun hooks. If there's no preempted allocations, then we simply provide a NoopAllocWatcher.
2018-12-05 18:18:04 +00:00
CSI Plugin Registration (#6555) This changeset implements the initial registration and fingerprinting of CSI Plugins as part of #5378. At a high level, it introduces the following: * A `csi_plugin` stanza as part of a Nomad task configuration, to allow a task to expose that it is a plugin. * A new task runner hook: `csi_plugin_supervisor`. This hook does two things. When the `csi_plugin` stanza is detected, it will automatically configure the plugin task to receive bidirectional mounts to the CSI intermediary directory. At runtime, it will then perform an initial heartbeat of the plugin and handle submitting it to the new `dynamicplugins.Registry` for further use by the client, and then run a lightweight heartbeat loop that will emit task events when health changes. * The `dynamicplugins.Registry` for handling plugins that run as Nomad tasks, in contrast to the existing catalog that requires `go-plugin` type plugins and to know the plugin configuration in advance. * The `csimanager` which fingerprints CSI plugins, in a similar way to `drivermanager` and `devicemanager`. It currently only fingerprints the NodeID from the plugin, and assumes that all plugins are monolithic. Missing features * We do not use the live updates of the `dynamicplugin` registry in the `csimanager` yet. * We do not deregister the plugins from the client when they shutdown yet, they just become indefinitely marked as unhealthy. This is deliberate until we figure out how we should manage deploying new versions of plugins/transitioning them.
2019-10-22 13:20:26 +00:00
// DynamicRegistry contains all locally registered dynamic plugins (e.g csi
// plugins).
DynamicRegistry dynamicplugins.Registry
csi: Add VolumeManager (#6920) This changeset is some pre-requisite boilerplate that is required for introducing CSI volume management for client nodes. It extracts out fingerprinting logic from the csi instance manager. This change is to facilitate reusing the csimanager to also manage the node-local CSI functionality, as it is the easiest place for us to guaruntee health checking and to provide additional visibility into the running operations through the fingerprinter mechanism and goroutine. It also introduces the VolumeMounter interface that will be used to manage staging/publishing unstaging/unpublishing of volumes on the host.
2020-01-08 12:47:07 +00:00
// CSIManager is used to wait for CSI Volumes to be attached, and by the task
// runner to manage their mounting
CSIManager csimanager.Manager
Device hook and devices affect computed node class This PR introduces a device hook that retrieves the device mount information for an allocation. It also updates the computed node class computation to take into account devices. TODO Fix the task runner unit test. The environment variable is being lost even though it is being properly set in the prestart hook.
2018-11-16 23:29:59 +00:00
// DeviceManager is used to mount devices as well as lookup device
// statistics
DeviceManager devicemanager.Manager
client/drivermananger: add driver manager The driver manager is modeled after the device manager and is started by the client. It's responsible for handling driver lifecycle and reattachment state, as well as processing the incomming fingerprint and task events from each driver. The mananger exposes a method for registering event handlers for task events that is used by the task runner to update the server when a task has been updated with an event. Since driver fingerprinting has been implemented by the driver manager, it is no longer needed in the fingerprint mananger and has been removed.
2018-11-28 03:42:22 +00:00
// DriverManager handles dispensing of driver plugins
DriverManager drivermanager.Manager
client: do not restart dead tasks until server is contacted (try 2) Refactoring of 104067bc2b2002a4e45ae7b667a476b89addc162 Switch the MarkLive method for a chan that is closed by the client. Thanks to @notnoop for the idea! The old approach called a method on most existing ARs and TRs on every runAllocs call. The new approach does a once.Do call in runAllocs to accomplish the same thing with less work. Able to remove the gate abstraction that did much more than was needed.
2019-05-10 15:51:06 +00:00
// ServersContactedCh is closed when the first GetClientAllocs call to
// servers succeeds and allocs are synced.
ServersContactedCh chan struct{}
client: Pass an RPC Client to AllocRunners As part of introducing support for CSI, AllocRunner hooks need to be able to communicate with Nomad Servers for validation of and interaction with storage volumes. Here we create a small RPCer interface and pass the client (rpc client) to the AR in preparation for making these RPCs.
2020-02-11 13:30:34 +00:00
// RPCClient is the RPC Client that should be used by the allocrunner and its
// hooks to communicate with Nomad Servers.
RPCClient RPCer
Initial V2 alloc runner
2018-06-22 00:35:07 +00:00
}