runner

package
v0.0.0-...-f19ae85 Latest Latest
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 Go to latest Published: Mar 12, 2015 License: AGPL-3.0 Imports: 27 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

View Source 
var ErrActionNotAvailable = errors.New("action no longer available")
View Source 
var ErrNoProcess = errors.New("no process to kill")
View Source 
var ErrReboot = errors.New("reboot after hook")
View Source 
var ErrRequeueAndReboot = errors.New("reboot now")

Functions

func IsBadActionError 

func IsBadActionError(err error) bool

func IsMissingHookError 

func IsMissingHookError(err error) bool

func NewBadActionError 

func NewBadActionError(actionName, problem string) error

func NewMissingHookError 

func NewMissingHookError(hookName string) error

Types

type ActionData 

type ActionData struct {
	ActionName     string
	ActionTag      names.ActionTag
	ActionParams   map[string]interface{}
	ActionFailed   bool
	ResultsMessage string
	ResultsMap     map[string]interface{}
}

ActionData contains the tag, parameters, and results of an Action.

type CommandInfo 

type CommandInfo struct {
	// RelationId is the relation context to execute the commands in.
	RelationId int
	// RemoteUnitName is the remote unit for the relation context.
	RemoteUnitName string
	// ForceRemoteUnit skips unit inference and existence validation.
	ForceRemoteUnit bool
}

type Context 

type Context interface {
	jujuc.Context
	Id() string
	HookVars(paths Paths) []string
	ActionData() (*ActionData, error)
	SetProcess(process *os.Process)
	FlushContext(badge string, failure error) error
}

Context exposes jujuc.Context, and additional methods needed by Runner.

type ContextRelation 

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

ContextRelation is the implementation of jujuc.ContextRelation.

func NewContextRelation 

func NewContextRelation(ru *uniter.RelationUnit, cache *RelationCache) *ContextRelation

NewContextRelation creates a new context for the given relation unit. The unit-name keys of members supplies the initial membership.

func (*ContextRelation) FakeId 

func (ctx *ContextRelation) FakeId() string

func (*ContextRelation) Id 

func (ctx *ContextRelation) Id() int

func (*ContextRelation) Name 

func (ctx *ContextRelation) Name() string

func (*ContextRelation) ReadSettings 

func (ctx *ContextRelation) ReadSettings(unit string) (settings params.Settings, err error)

func (*ContextRelation) Settings 

func (ctx *ContextRelation) Settings() (jujuc.Settings, error)

func (*ContextRelation) UnitNames 

func (ctx *ContextRelation) UnitNames() []string

func (*ContextRelation) WriteSettings 

func (ctx *ContextRelation) WriteSettings() (err error)

WriteSettings persists all changes made to the unit's relation settings.

type Factory 

type Factory interface {

	// NewCommandRunner returns an execution context suitable for running
	// an arbitrary script.
	NewCommandRunner(commandInfo CommandInfo) (Runner, error)

	// NewHookRunner returns an execution context suitable for running the
	// supplied hook definition (which must be valid).
	NewHookRunner(hookInfo hook.Info) (Runner, error)

	// NewActionRunner returns an execution context suitable for running the
	// action identified by the supplied id.
	NewActionRunner(actionId string) (Runner, error)
}

Factory represents a long-lived object that can create execution contexts relevant to a specific unit. In its current state, it is somewhat bizarre and inconsistent; its main value is as an evolutionary step towards a better division of responsibilities across worker/uniter and its subpackages.

func NewFactory 

func NewFactory(
	state *uniter.State,
	unitTag names.UnitTag,
	getRelationInfos RelationsFunc,
	paths Paths,
) (
	Factory, error,
)

NewFactory returns a Factory capable of creating execution contexts backed by the supplied unit's supplied API connection.

type HookContext 

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

HookContext is the implementation of jujuc.Context.

func (*HookContext) ActionData 

func (c *HookContext) ActionData() (*ActionData, error)

ActionData returns the context's internal action data. It's meant to be transitory; it exists to allow uniter and runner code to keep working as it did; it should be considered deprecated, and not used by new clients.

func (*HookContext) ActionName 

func (ctx *HookContext) ActionName() (string, error)

ActionName returns the name of the action.

func (*HookContext) ActionParams 

func (ctx *HookContext) ActionParams() (map[string]interface{}, error)

ActionParams simply returns the arguments to the Action.

func (*HookContext) AddMetric 

func (ctx *HookContext) AddMetric(key, value string, created time.Time) error

AddMetrics adds metrics to the hook context.

func (*HookContext) AvailabilityZone 

func (ctx *HookContext) AvailabilityZone() (string, bool)

func (*HookContext) ClosePorts 

func (ctx *HookContext) ClosePorts(protocol string, fromPort, toPort int) error

func (*HookContext) ConfigSettings 

func (ctx *HookContext) ConfigSettings() (charm.Settings, error)

func (*HookContext) FlushContext 

func (ctx *HookContext) FlushContext(process string, ctxErr error) (err error)

func (*HookContext) GetProcess 

func (ctx *HookContext) GetProcess() *os.Process

func (*HookContext) GetRebootPriority 

func (ctx *HookContext) GetRebootPriority() jujuc.RebootPriority

func (*HookContext) HookRelation 

func (ctx *HookContext) HookRelation() (jujuc.ContextRelation, bool)

func (*HookContext) HookStorageInstance 

func (ctx *HookContext) HookStorageInstance() (*storage.StorageInstance, bool)

func (*HookContext) HookVars 

func (context *HookContext) HookVars(paths Paths) []string

HookVars returns an os.Environ-style list of strings necessary to run a hook such that it can know what environment it's operating in, and can call back into context.

func (*HookContext) Id 

func (ctx *HookContext) Id() string

func (*HookContext) OpenPorts 

func (ctx *HookContext) OpenPorts(protocol string, fromPort, toPort int) error

func (*HookContext) OpenedPorts 

func (ctx *HookContext) OpenedPorts() []network.PortRange

func (*HookContext) OwnerTag 

func (ctx *HookContext) OwnerTag() string

func (*HookContext) PrivateAddress 

func (ctx *HookContext) PrivateAddress() (string, bool)

func (*HookContext) PublicAddress 

func (ctx *HookContext) PublicAddress() (string, bool)

func (*HookContext) Relation 

func (ctx *HookContext) Relation(id int) (jujuc.ContextRelation, bool)

func (*HookContext) RelationIds 

func (ctx *HookContext) RelationIds() []int

func (*HookContext) RemoteUnitName 

func (ctx *HookContext) RemoteUnitName() (string, bool)

func (*HookContext) RequestReboot 

func (ctx *HookContext) RequestReboot(priority jujuc.RebootPriority) error

func (*HookContext) SetActionFailed 

func (ctx *HookContext) SetActionFailed() error

SetActionFailed sets the fail state of the action.

func (*HookContext) SetActionMessage 

func (ctx *HookContext) SetActionMessage(message string) error

SetActionMessage sets a message for the Action, usually an error message.

func (*HookContext) SetProcess 

func (ctx *HookContext) SetProcess(process *os.Process)

func (*HookContext) SetRebootPriority 

func (ctx *HookContext) SetRebootPriority(priority jujuc.RebootPriority)

func (*HookContext) StorageInstance 

func (ctx *HookContext) StorageInstance(storageId string) (*storage.StorageInstance, bool)

func (*HookContext) UnitName 

func (ctx *HookContext) UnitName() string

func (*HookContext) UpdateActionResults 

func (ctx *HookContext) UpdateActionResults(keys []string, value string) error

UpdateActionResults inserts new values for use with action-set and action-fail. The results struct will be delivered to the state server upon completion of the Action. It returns an error if not called on an Action-containing HookContext.

type Paths 

type Paths interface {

	// GetToolsDir returns the filesystem path to the dirctory containing
	// the hook tool symlinks.
	GetToolsDir() string

	// GetCharmDir returns the filesystem path to the directory in which
	// the charm is installed.
	GetCharmDir() string

	// GetJujucSocket returns the path to the socket used by the hook tools
	// to communicate back to the executing uniter process. It might be a
	// filesystem path, or it might be abstract.
	GetJujucSocket() string
}

Paths exposes the paths needed by Runner.

type PortRange 

type PortRange struct {
	Ports      network.PortRange
	RelationId int
}

PortRange contains a port range and a relation id. Used as key to pendingRelations and is only exported for testing.

type PortRangeInfo 

type PortRangeInfo struct {
	ShouldOpen  bool
	RelationTag names.RelationTag
}

PortRangeInfo contains information about a pending open- or close-port operation for a port range. This is only exported for testing.

type RelationCache 

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

RelationCache stores a relation's remote unit membership and settings. Member settings are stored until invalidated or removed by name; settings of non-member units are stored only until the cache is pruned.

func NewRelationCache 

func NewRelationCache(readSettings SettingsFunc, memberNames []string) *RelationCache

NewRelationCache creates a new RelationCache that will use the supplied SettingsFunc to populate itself on demand. Initial membership is determined by memberNames.

func (*RelationCache) InvalidateMember 

func (cache *RelationCache) InvalidateMember(memberName string)

InvalidateMember ensures that the named remote unit will be considered a member of the relation, and that the next attempt to read its settings will use fresh data.

func (*RelationCache) MemberNames 

func (cache *RelationCache) MemberNames() (memberNames []string)

MemberNames returns the names of the remote units present in the relation.

func (*RelationCache) Prune 

func (cache *RelationCache) Prune(memberNames []string)

Prune resets the membership to the supplied list, and discards the settings of all non-member units.

func (*RelationCache) RemoveMember 

func (cache *RelationCache) RemoveMember(memberName string)

RemoveMember ensures that the named remote unit will not be considered a member of the relation,

func (*RelationCache) Settings 

func (cache *RelationCache) Settings(unitName string) (params.Settings, error)

Settings returns the settings of the named remote unit. It's valid to get the settings of any unit that has ever been in the relation.

type RelationInfo 

type RelationInfo struct {
	RelationUnit *uniter.RelationUnit
	MemberNames  []string
}

type RelationsFunc 

type RelationsFunc func() map[int]*RelationInfo

RelationsFunc is used to get snapshots of relation membership at context creation time.

type Runner 

type Runner interface {

	// Context returns the context against which the runner executes.
	Context() Context

	// RunHook executes the hook with the supplied name.
	RunHook(name string) error

	// RunAction executes the action with the supplied name.
	RunAction(name string) error

	// RunCommands executes the supplied script.
	RunCommands(commands string) (*utilexec.ExecResponse, error)
}

Runner is reponsible for invoking commands in a context.

func NewRunner 

func NewRunner(context Context, paths Paths) Runner

NewRunner returns a Runner backed by the supplied context and paths.

type SettingsFunc 

type SettingsFunc func(unitName string) (params.Settings, error)

SettingsFunc returns the relation settings for a unit.

type SettingsMap 

type SettingsMap map[string]params.Settings

SettingsMap is a map from unit name to relation settings.

Source Files

View all Source files

Directories

Path Synopsis
The worker/uniter/runner/jujuc package implements the server side of the jujuc proxy tool, which forwards command invocations to the unit agent process so that they can be executed against specific state.
 The worker/uniter/runner/jujuc package implements the server side of the jujuc proxy tool, which forwards command invocations to the unit agent process so that they can be executed against specific state.

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