plugin

Documentation

Index

• type CreateOpt
  • func WithEnv(env []string) CreateOpt
  • func WithSwarmService(id string) CreateOpt
• type EndpointResolver
• type Event
• type EventCreate
• type EventDisable
• type EventEnable
• type EventRemove
• type Executor
• type ExecutorCreator
• type Manager
  • func NewManager(config ManagerConfig) (*Manager, error)
  • func (pm *Manager) CreateFromContext(ctx context.Context, tarCtx io.ReadCloser, options *types.PluginCreateOptions) (err error)
  • func (pm *Manager) Disable(refOrID string, config *backend.PluginDisableConfig) error
  • func (pm *Manager) Enable(refOrID string, config *backend.PluginEnableConfig) error
  • func (pm *Manager) GC()
  • func (pm *Manager) Get(idOrName string) (*v2.Plugin, error)
  • func (pm *Manager) HandleExitEvent(id string) error
  • func (pm *Manager) Inspect(refOrID string) (tp *types.Plugin, err error)
  • func (pm *Manager) List(pluginFilters filters.Args) ([]types.Plugin, error)
  • func (pm *Manager) Privileges(ctx context.Context, ref reference.Named, metaHeader http.Header, ...) (types.PluginPrivileges, error)
  • func (pm *Manager) Pull(ctx context.Context, ref reference.Named, name string, metaHeader http.Header, ...) (err error)
  • func (pm *Manager) Push(ctx context.Context, name string, metaHeader http.Header, ...) error
  • func (pm *Manager) Remove(name string, config *backend.PluginRmConfig) error
  • func (pm *Manager) Set(name string, args []string) error
  • func (pm *Manager) Shutdown()
  • func (pm *Manager) SubscribeEvents(buffer int, watchEvents ...Event) (eventCh <-chan interface{}, cancel func())
  • func (pm *Manager) Upgrade(ctx context.Context, ref reference.Named, name string, metaHeader http.Header, ...) (err error)
• type ManagerConfig
• type SpecOpt
  • func WithSpecMounts(mounts []specs.Mount) SpecOpt
• type Store
  • func NewStore() *Store
  • func (ps *Store) Add(p *v2.Plugin) error
  • func (ps *Store) CallHandler(p *v2.Plugin)
  • func (ps *Store) Get(name, capability string, mode int) (plugingetter.CompatPlugin, error)
  • func (ps *Store) GetAll() map[string]*v2.Plugin
  • func (ps *Store) GetAllByCap(capability string) ([]plugingetter.CompatPlugin, error)
  • func (ps *Store) GetAllManagedPluginsByCap(capability string) []plugingetter.CompatPlugin
  • func (ps *Store) GetV2Plugin(refOrID string) (*v2.Plugin, error)
  • func (ps *Store) Handle(capability string, callback func(string, *plugins.Client))
  • func (ps *Store) RegisterRuntimeOpt(cap string, opts ...SpecOpt)
  • func (ps *Store) Remove(p *v2.Plugin)
  • func (ps *Store) SetAll(plugins map[string]*v2.Plugin)
  • func (ps *Store) SetState(p *v2.Plugin, state bool)

Types

type CreateOpt

type CreateOpt func(p *v2.Plugin)

CreateOpt is used to configure specific plugin details when created

func WithEnv

func WithEnv(env []string) CreateOpt

WithEnv is a CreateOpt that passes the user-provided environment variables to the plugin container, de-duplicating variables with the same names case sensitively and only appends valid key=value pairs

func WithSwarmService

func WithSwarmService(id string) CreateOpt

WithSwarmService is a CreateOpt that flags the passed in a plugin as a plugin managed by swarm

type EndpointResolver

type EndpointResolver interface {
	LookupPullEndpoints(hostname string) (endpoints []registry.APIEndpoint, err error)
}

EndpointResolver provides looking up registry endpoints for pulling.

type Event

type Event interface {
	// contains filtered or unexported methods
}

Event is emitted for actions performed on the plugin manager

type EventCreate

type EventCreate struct {
	Interfaces map[string]bool
	Plugin     types.Plugin
}

EventCreate is an event which is emitted when a plugin is created This is either by pull or create from context.

Use the `Interfaces` field to match only plugins that implement a specific interface. These are matched against using "or" logic. If no interfaces are listed, all are matched.

type EventDisable

type EventDisable struct {
	Plugin types.Plugin
}

EventDisable is an event that is emitted when a plugin is disabled It maches on the passed in plugin's ID only.

type EventEnable

type EventEnable struct {
	Plugin types.Plugin
}

EventEnable is an event that is emitted when a plugin is disabled It maches on the passed in plugin's ID only.

type EventRemove

type EventRemove struct {
	Plugin types.Plugin
}

EventRemove is an event which is emitted when a plugin is removed It maches on the passed in plugin's ID only.

type Executor

type Executor interface {
	Create(id string, spec specs.Spec, stdout, stderr io.WriteCloser) error
	IsRunning(id string) (bool, error)
	Restore(id string, stdout, stderr io.WriteCloser) (alive bool, err error)
	Signal(id string, signal syscall.Signal) error
}

Executor is the interface that the plugin manager uses to interact with for starting/stopping plugins

type ExecutorCreator

type ExecutorCreator func(*Manager) (Executor, error)

ExecutorCreator is used in the manager config to pass in an `Executor`

type Manager

type Manager struct {
	// contains filtered or unexported fields
}

Manager controls the plugin subsystem.

func NewManager

func NewManager(config ManagerConfig) (*Manager, error)

NewManager returns a new plugin manager.

func (*Manager) CreateFromContext

func (pm *Manager) CreateFromContext(ctx context.Context, tarCtx io.ReadCloser, options *types.PluginCreateOptions) (err error)

CreateFromContext creates a plugin from the given pluginDir which contains both the rootfs and the config.json and a repoName with optional tag.

func (*Manager) Disable

func (pm *Manager) Disable(refOrID string, config *backend.PluginDisableConfig) error

Disable deactivates a plugin. This means resources (volumes, networks) cant use them.

func (*Manager) Enable

func (pm *Manager) Enable(refOrID string, config *backend.PluginEnableConfig) error

Enable activates a plugin, which implies that they are ready to be used by containers.

func (*Manager) GC

func (pm *Manager) GC()

GC cleans up unreferenced blobs. This is recommended to run in a goroutine

func (*Manager) Get

func (pm *Manager) Get(idOrName string) (*v2.Plugin, error)

Get looks up the requested plugin in the store.

func (*Manager) HandleExitEvent

func (pm *Manager) HandleExitEvent(id string) error

HandleExitEvent is called when the executor receives the exit event In the future we may change this, but for now all we care about is the exit event.

func (*Manager) Inspect

func (pm *Manager) Inspect(refOrID string) (tp *types.Plugin, err error)

Inspect examines a plugin config

func (*Manager) List

func (pm *Manager) List(pluginFilters filters.Args) ([]types.Plugin, error)

List displays the list of plugins and associated metadata.

func (*Manager) Privileges

func (pm *Manager) Privileges(ctx context.Context, ref reference.Named, metaHeader http.Header, authConfig *registry.AuthConfig) (types.PluginPrivileges, error)

Privileges pulls a plugin config and computes the privileges required to install it.

func (*Manager) Pull

func (pm *Manager) Pull(ctx context.Context, ref reference.Named, name string, metaHeader http.Header, authConfig *registry.AuthConfig, privileges types.PluginPrivileges, outStream io.Writer, opts ...CreateOpt) (err error)

Pull pulls a plugin, check if the correct privileges are provided and install the plugin.

TODO: replace reference package usage with simpler url.Parse semantics

func (*Manager) Push

func (pm *Manager) Push(ctx context.Context, name string, metaHeader http.Header, authConfig *registry.AuthConfig, outStream io.Writer) error

Push pushes a plugin to the registry.

func (*Manager) Remove

func (pm *Manager) Remove(name string, config *backend.PluginRmConfig) error

Remove deletes plugin's root directory.

func (*Manager) Set

func (pm *Manager) Set(name string, args []string) error

Set sets plugin args

func (*Manager) Shutdown

func (pm *Manager) Shutdown()

Shutdown stops all plugins and called during daemon shutdown.

func (*Manager) SubscribeEvents

func (pm *Manager) SubscribeEvents(buffer int, watchEvents ...Event) (eventCh <-chan interface{}, cancel func())

SubscribeEvents provides an event channel to listen for structured events from the plugin manager actions, CRUD operations. The caller must call the returned `cancel()` function once done with the channel or this will leak resources.

func (*Manager) Upgrade

func (pm *Manager) Upgrade(ctx context.Context, ref reference.Named, name string, metaHeader http.Header, authConfig *registry.AuthConfig, privileges types.PluginPrivileges, outStream io.Writer) (err error)

Upgrade upgrades a plugin

TODO: replace reference package usage with simpler url.Parse semantics

type ManagerConfig

type ManagerConfig struct {
	Store              *Store // remove
	RegistryService    EndpointResolver
	LiveRestoreEnabled bool // TODO: remove
	LogPluginEvent     eventLogger
	Root               string
	ExecRoot           string
	CreateExecutor     ExecutorCreator
	AuthzMiddleware    *authorization.Middleware
}

ManagerConfig defines configuration needed to start new manager.

type SpecOpt

type SpecOpt func(*specs.Spec)

SpecOpt is used for subsystems that need to modify the runtime spec of a plugin

func WithSpecMounts

func WithSpecMounts(mounts []specs.Mount) SpecOpt

WithSpecMounts is a SpecOpt which appends the provided mounts to the runtime spec

type Store

type Store struct {
	sync.RWMutex
	// contains filtered or unexported fields
}

Store manages the plugin inventory in memory and on-disk

func NewStore

func NewStore() *Store

NewStore creates a Store.

func (*Store) Add

func (ps *Store) Add(p *v2.Plugin) error

Add adds a plugin to memory and plugindb. An error will be returned if there is a collision.

func (*Store) CallHandler

func (ps *Store) CallHandler(p *v2.Plugin)

CallHandler calls the registered callback. It is invoked during plugin enable.

func (*Store) Get

func (ps *Store) Get(name, capability string, mode int) (plugingetter.CompatPlugin, error)

Get returns an enabled plugin matching the given name and capability.

func (*Store) GetAll

func (ps *Store) GetAll() map[string]*v2.Plugin

GetAll retrieves all plugins.

func (*Store) GetAllByCap

func (ps *Store) GetAllByCap(capability string) ([]plugingetter.CompatPlugin, error)

GetAllByCap returns a list of enabled plugins matching the given capability.

func (*Store) GetAllManagedPluginsByCap

func (ps *Store) GetAllManagedPluginsByCap(capability string) []plugingetter.CompatPlugin

GetAllManagedPluginsByCap returns a list of managed plugins matching the given capability.

func (*Store) GetV2Plugin

func (ps *Store) GetV2Plugin(refOrID string) (*v2.Plugin, error)

GetV2Plugin retrieves a plugin by name, id or partial ID.

func (*Store) Handle

func (ps *Store) Handle(capability string, callback func(string, *plugins.Client))

Handle sets a callback for a given capability. It is only used by network and ipam drivers during plugin registration. The callback registers the driver with the subsystem (network, ipam).

func (*Store) RegisterRuntimeOpt

func (ps *Store) RegisterRuntimeOpt(cap string, opts ...SpecOpt)

RegisterRuntimeOpt stores a list of SpecOpts for the provided capability. These options are applied to the runtime spec before a plugin is started for the specified capability.

func (*Store) Remove

func (ps *Store) Remove(p *v2.Plugin)

Remove removes a plugin from memory and plugindb.

func (*Store) SetAll

func (ps *Store) SetAll(plugins map[string]*v2.Plugin)

SetAll initialized plugins during daemon restore.

func (*Store) SetState

func (ps *Store) SetState(p *v2.Plugin, state bool)

SetState sets the active state of the plugin and updates plugindb.