// startModelWorkers starts the set of workers that run for every model
// in each controller.
func (a *MachineAgent) startModelWorkers(uuid string) (worker.Worker, error) {
modelAgent, err := model.WrapAgent(a, uuid)
if err != nil {
return nil, errors.Trace(err)
}
engine, err := dependency.NewEngine(dependency.EngineConfig{
IsFatal: model.IsFatal,
WorstError: model.WorstError,
Filter: model.IgnoreErrRemoved,
ErrorDelay: 3 * time.Second,
BounceDelay: 10 * time.Millisecond,
})
if err != nil {
return nil, errors.Trace(err)
}
manifolds := modelManifolds(model.ManifoldsConfig{
Agent: modelAgent,
AgentConfigChanged: a.configChangedVal,
Clock: clock.WallClock,
RunFlagDuration: time.Minute,
CharmRevisionUpdateInterval: 24 * time.Hour,
EntityStatusHistoryCount: 100,
EntityStatusHistoryInterval: 5 * time.Minute,
SpacesImportedGate: a.discoverSpacesComplete,
})
if err := dependency.Install(engine, manifolds); err != nil {
if err := worker.Stop(engine); err != nil {
logger.Errorf("while stopping engine with bad manifolds: %v", err)
}
return nil, errors.Trace(err)
}
return engine, nil
}
// APIWorkers returns a dependency.Engine running the unit agent's responsibilities.
func (a *UnitAgent) APIWorkers() (worker.Worker, error) {
manifolds := unit.Manifolds(unit.ManifoldsConfig{
Agent: agent.APIHostPortsSetter{a},
LogSource: a.bufferedLogs,
LeadershipGuarantee: 30 * time.Second,
AgentConfigChanged: a.configChangedVal,
})
config := dependency.EngineConfig{
IsFatal: cmdutil.IsFatal,
WorstError: cmdutil.MoreImportantError,
ErrorDelay: 3 * time.Second,
BounceDelay: 10 * time.Millisecond,
}
engine, err := dependency.NewEngine(config)
if err != nil {
return nil, err
}
if err := dependency.Install(engine, manifolds); err != nil {
if err := worker.Stop(engine); err != nil {
logger.Errorf("while stopping engine with bad manifolds: %v", err)
}
return nil, err
}
return engine, nil
}
func (a *MachineAgent) makeEngineCreator(previousAgentVersion version.Number) func() (worker.Worker, error) {
return func() (worker.Worker, error) {
config := dependency.EngineConfig{
IsFatal: cmdutil.IsFatal,
WorstError: cmdutil.MoreImportantError,
ErrorDelay: 3 * time.Second,
BounceDelay: 10 * time.Millisecond,
}
engine, err := dependency.NewEngine(config)
if err != nil {
return nil, err
}
manifolds := machineManifolds(machine.ManifoldsConfig{
PreviousAgentVersion: previousAgentVersion,
Agent: agent.APIHostPortsSetter{Agent: a},
RootDir: a.rootDir,
AgentConfigChanged: a.configChangedVal,
UpgradeStepsLock: a.upgradeComplete,
UpgradeCheckLock: a.initialUpgradeCheckComplete,
OpenState: a.initState,
OpenStateForUpgrade: a.openStateForUpgrade,
StartStateWorkers: a.startStateWorkers,
StartAPIWorkers: a.startAPIWorkers,
PreUpgradeSteps: upgrades.PreUpgradeSteps,
LogSource: a.bufferedLogs,
NewDeployContext: newDeployContext,
Clock: clock.WallClock,
ValidateMigration: a.validateMigration,
})
if err := dependency.Install(engine, manifolds); err != nil {
if err := worker.Stop(engine); err != nil {
logger.Errorf("while stopping engine with bad manifolds: %v", err)
}
return nil, err
}
if err := startIntrospection(introspectionConfig{
Agent: a,
Engine: engine,
WorkerFunc: introspection.NewWorker,
}); err != nil {
// If the introspection worker failed to start, we just log error
// but continue. It is very unlikely to happen in the real world
// as the only issue is connecting to the abstract domain socket
// and the agent is controlled by by the OS to only have one.
logger.Errorf("failed to start introspection worker: %v", err)
}
return engine, nil
}
}
func (s *EngineSuite) TestInstallConvenienceWrapper(c *gc.C) {
mh1 := newManifoldHarness()
mh2 := newManifoldHarness()
mh3 := newManifoldHarness()
err := dependency.Install(s.engine, dependency.Manifolds{
"mh1": mh1.Manifold(),
"mh2": mh2.Manifold(),
"mh3": mh3.Manifold(),
})
c.Assert(err, jc.ErrorIsNil)
mh1.AssertOneStart(c)
mh2.AssertOneStart(c)
mh3.AssertOneStart(c)
}
// startModelWorkers starts the set of workers that run for every model
// in each controller.
func (a *MachineAgent) startModelWorkers(controllerUUID, modelUUID string) (worker.Worker, error) {
modelAgent, err := model.WrapAgent(a, controllerUUID, modelUUID)
if err != nil {
return nil, errors.Trace(err)
}
engine, err := dependency.NewEngine(dependency.EngineConfig{
IsFatal: model.IsFatal,
WorstError: model.WorstError,
Filter: model.IgnoreErrRemoved,
ErrorDelay: 3 * time.Second,
BounceDelay: 10 * time.Millisecond,
})
if err != nil {
return nil, errors.Trace(err)
}
manifolds := modelManifolds(model.ManifoldsConfig{
Agent: modelAgent,
AgentConfigChanged: a.configChangedVal,
Clock: clock.WallClock,
RunFlagDuration: time.Minute,
CharmRevisionUpdateInterval: 24 * time.Hour,
InstPollerAggregationDelay: 3 * time.Second,
// TODO(perrito666) the status history pruning numbers need
// to be adjusting, after collecting user data from large install
// bases, to numbers allowing a rich and useful back history.
StatusHistoryPrunerMaxHistoryTime: 336 * time.Hour, // 2 weeks
StatusHistoryPrunerMaxHistoryMB: 5120, // 5G
StatusHistoryPrunerInterval: 5 * time.Minute,
SpacesImportedGate: a.discoverSpacesComplete,
NewEnvironFunc: newEnvirons,
NewMigrationMaster: migrationmaster.NewWorker,
})
if err := dependency.Install(engine, manifolds); err != nil {
if err := worker.Stop(engine); err != nil {
logger.Errorf("while stopping engine with bad manifolds: %v", err)
}
return nil, errors.Trace(err)
}
return engine, nil
}
// APIWorkers returns a dependency.Engine running the unit agent's responsibilities.
func (a *UnitAgent) APIWorkers() (worker.Worker, error) {
manifolds := unitManifolds(unit.ManifoldsConfig{
Agent: agent.APIHostPortsSetter{a},
LogSource: a.bufferedLogs,
LeadershipGuarantee: 30 * time.Second,
AgentConfigChanged: a.configChangedVal,
ValidateMigration: a.validateMigration,
})
config := dependency.EngineConfig{
IsFatal: cmdutil.IsFatal,
WorstError: cmdutil.MoreImportantError,
ErrorDelay: 3 * time.Second,
BounceDelay: 10 * time.Millisecond,
}
engine, err := dependency.NewEngine(config)
if err != nil {
return nil, err
}
if err := dependency.Install(engine, manifolds); err != nil {
if err := worker.Stop(engine); err != nil {
logger.Errorf("while stopping engine with bad manifolds: %v", err)
}
return nil, err
}
if err := startIntrospection(introspectionConfig{
Agent: a,
Engine: engine,
WorkerFunc: introspection.NewWorker,
}); err != nil {
// If the introspection worker failed to start, we just log error
// but continue. It is very unlikely to happen in the real world
// as the only issue is connecting to the abstract domain socket
// and the agent is controlled by by the OS to only have one.
logger.Errorf("failed to start introspection worker: %v", err)
}
return engine, nil
}
func (a *MachineAgent) makeEngineCreator(previousAgentVersion version.Number) func() (worker.Worker, error) {
return func() (worker.Worker, error) {
config := dependency.EngineConfig{
IsFatal: cmdutil.IsFatal,
WorstError: cmdutil.MoreImportantError,
ErrorDelay: 3 * time.Second,
BounceDelay: 10 * time.Millisecond,
}
engine, err := dependency.NewEngine(config)
if err != nil {
return nil, err
}
manifolds := machine.Manifolds(machine.ManifoldsConfig{
PreviousAgentVersion: previousAgentVersion,
Agent: agent.APIHostPortsSetter{Agent: a},
RootDir: a.rootDir,
AgentConfigChanged: a.configChangedVal,
UpgradeStepsLock: a.upgradeComplete,
UpgradeCheckLock: a.initialUpgradeCheckComplete,
OpenState: a.initState,
OpenStateForUpgrade: a.openStateForUpgrade,
StartStateWorkers: a.startStateWorkers,
StartAPIWorkers: a.startAPIWorkers,
PreUpgradeSteps: upgrades.PreUpgradeSteps,
LogSource: a.bufferedLogs,
NewDeployContext: newDeployContext,
Clock: clock.WallClock,
})
if err := dependency.Install(engine, manifolds); err != nil {
if err := worker.Stop(engine); err != nil {
logger.Errorf("while stopping engine with bad manifolds: %v", err)
}
return nil, err
}
return engine, nil
}
}