Esempio n. 1
0
File: unit.go Progetto: jkary/core
func (a *UnitAgent) APIWorkers() (worker.Worker, error) {
	agentConfig := a.CurrentConfig()
	dataDir := agentConfig.DataDir()
	hookLock, err := hookExecutionLock(dataDir)
	if err != nil {
		return nil, err
	}
	st, entity, err := openAPIState(agentConfig, a)
	if err != nil {
		return nil, err
	}
	runner := worker.NewRunner(connectionIsFatal(st), moreImportant)
	runner.StartWorker("upgrader", func() (worker.Worker, error) {
		return upgrader.NewUpgrader(st.Upgrader(), agentConfig), nil
	})
	runner.StartWorker("logger", func() (worker.Worker, error) {
		return workerlogger.NewLogger(st.Logger(), agentConfig), nil
	})
	runner.StartWorker("uniter", func() (worker.Worker, error) {
		return uniter.NewUniter(st.Uniter(), entity.Tag(), dataDir, hookLock), nil
	})
	runner.StartWorker("apiaddressupdater", func() (worker.Worker, error) {
		return apiaddressupdater.NewAPIAddressUpdater(st.Uniter(), a), nil
	})
	runner.StartWorker("rsyslog", func() (worker.Worker, error) {
		return newRsyslogConfigWorker(st.Rsyslog(), agentConfig, rsyslog.RsyslogModeForwarding)
	})
	return newCloseWorker(runner, st), nil
}
Esempio n. 2
0
// APIWorker returns a Worker that connects to the API and starts any
// workers that need an API connection.
func (a *MachineAgent) APIWorker() (worker.Worker, error) {
	agentConfig := a.CurrentConfig()
	st, entity, err := openAPIState(agentConfig, a)
	if err != nil {
		return nil, err
	}
	reportOpenedAPI(st)

	// Refresh the configuration, since it may have been updated after opening state.
	agentConfig = a.CurrentConfig()

	for _, job := range entity.Jobs() {
		if job.NeedsState() {
			info, err := st.Agent().StateServingInfo()
			if err != nil {
				return nil, fmt.Errorf("cannot get state serving info: %v", err)
			}
			err = a.ChangeConfig(func(config agent.ConfigSetter) {
				config.SetStateServingInfo(info)
			})
			if err != nil {
				return nil, err
			}
			agentConfig = a.CurrentConfig()
			break
		}
	}

	rsyslogMode := rsyslog.RsyslogModeForwarding
	runner := newRunner(connectionIsFatal(st), moreImportant)
	var singularRunner worker.Runner
	for _, job := range entity.Jobs() {
		if job == params.JobManageEnviron {
			rsyslogMode = rsyslog.RsyslogModeAccumulate
			conn := singularAPIConn{st, st.Agent()}
			singularRunner, err = newSingularRunner(runner, conn)
			if err != nil {
				return nil, fmt.Errorf("cannot make singular API Runner: %v", err)
			}
			break
		}
	}

	// Run the upgrader and the upgrade-steps worker without waiting for
	// the upgrade steps to complete.
	runner.StartWorker("upgrader", func() (worker.Worker, error) {
		return upgrader.NewUpgrader(st.Upgrader(), agentConfig), nil
	})
	runner.StartWorker("upgrade-steps", func() (worker.Worker, error) {
		return a.upgradeWorker(st, entity.Jobs(), agentConfig), nil
	})

	// All other workers must wait for the upgrade steps to complete
	// before starting.
	a.startWorkerAfterUpgrade(runner, "machiner", func() (worker.Worker, error) {
		return machiner.NewMachiner(st.Machiner(), agentConfig), nil
	})
	a.startWorkerAfterUpgrade(runner, "apiaddressupdater", func() (worker.Worker, error) {
		return apiaddressupdater.NewAPIAddressUpdater(st.Machiner(), a), nil
	})
	a.startWorkerAfterUpgrade(runner, "logger", func() (worker.Worker, error) {
		return workerlogger.NewLogger(st.Logger(), agentConfig), nil
	})
	a.startWorkerAfterUpgrade(runner, "machineenvironmentworker", func() (worker.Worker, error) {
		return machineenvironmentworker.NewMachineEnvironmentWorker(st.Environment(), agentConfig), nil
	})
	a.startWorkerAfterUpgrade(runner, "rsyslog", func() (worker.Worker, error) {
		return newRsyslogConfigWorker(st.Rsyslog(), agentConfig, rsyslogMode)
	})

	// If not a local provider bootstrap machine, start the worker to
	// manage SSH keys.
	providerType := agentConfig.Value(agent.ProviderType)
	if providerType != provider.Local || a.MachineId != bootstrapMachineId {
		a.startWorkerAfterUpgrade(runner, "authenticationworker", func() (worker.Worker, error) {
			return authenticationworker.NewWorker(st.KeyUpdater(), agentConfig), nil
		})
	}

	// Perform the operations needed to set up hosting for containers.
	if err := a.setupContainerSupport(runner, st, entity, agentConfig); err != nil {
		return nil, fmt.Errorf("setting up container support: %v", err)
	}
	for _, job := range entity.Jobs() {
		switch job {
		case params.JobHostUnits:
			a.startWorkerAfterUpgrade(runner, "deployer", func() (worker.Worker, error) {
				apiDeployer := st.Deployer()
				context := newDeployContext(apiDeployer, agentConfig)
				return deployer.NewDeployer(apiDeployer, context), nil
			})
		case params.JobManageEnviron:
			a.startWorkerAfterUpgrade(singularRunner, "environ-provisioner", func() (worker.Worker, error) {
				return provisioner.NewEnvironProvisioner(st.Provisioner(), agentConfig), nil
			})
			// TODO(axw) 2013-09-24 bug #1229506
			// Make another job to enable the firewaller. Not all
			// environments are capable of managing ports
			// centrally.
			a.startWorkerAfterUpgrade(singularRunner, "firewaller", func() (worker.Worker, error) {
				return firewaller.NewFirewaller(st.Firewaller())
			})
			a.startWorkerAfterUpgrade(singularRunner, "charm-revision-updater", func() (worker.Worker, error) {
				return charmrevisionworker.NewRevisionUpdateWorker(st.CharmRevisionUpdater()), nil
			})
		case params.JobManageStateDeprecated:
			// Legacy environments may set this, but we ignore it.
		default:
			// TODO(dimitern): Once all workers moved over to using
			// the API, report "unknown job type" here.
		}
	}
	return newCloseWorker(runner, st), nil // Note: a worker.Runner is itself a worker.Worker.
}