Esempio n. 1
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func newWorker(a agent.Agent, apiCaller base.APICaller) (worker.Worker, error) {
	cfg := a.CurrentConfig()
	// Grab the tag and ensure that it's for a machine.
	tag, ok := cfg.Tag().(names.MachineTag)
	if !ok {
		return nil, errors.New("this manifold may only be used inside a machine agent")
	}

	// Get the machine agent's jobs.
	// TODO(fwereade): this functionality should be on the
	// deployer facade instead.
	agentFacade := apiagent.NewState(apiCaller)
	entity, err := agentFacade.Entity(tag)
	if err != nil {
		return nil, err
	}

	var isModelManager bool
	for _, job := range entity.Jobs() {
		if job == multiwatcher.JobManageModel {
			isModelManager = true
			break
		}
	}
	if !isModelManager {
		return nil, dependency.ErrMissing
	}

	return NewResumer(apiresumer.NewAPI(apiCaller)), nil
}
Esempio n. 2
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func (s *machineSuite) TestEntitySetPassword(c *gc.C) {
	entity, err := apiagent.NewState(s.st).Entity(s.machine.Tag())
	c.Assert(err, jc.ErrorIsNil)

	err = entity.SetPassword("foo")
	c.Assert(err, gc.ErrorMatches, "password is only 3 bytes long, and is not a valid Agent password")
	err = entity.SetPassword("foo-12345678901234567890")
	c.Assert(err, jc.ErrorIsNil)
	err = entity.ClearReboot()
	c.Assert(err, jc.ErrorIsNil)

	err = s.machine.Refresh()
	c.Assert(err, jc.ErrorIsNil)
	c.Assert(s.machine.PasswordValid("bar"), jc.IsFalse)
	c.Assert(s.machine.PasswordValid("foo-12345678901234567890"), jc.IsTrue)

	// Check that we cannot log in to mongo with the correct password.
	// This is because there's no mongo password set for s.machine,
	// which has JobHostUnits
	info := s.MongoInfo(c)
	// TODO(dfc) this entity.Tag should return a Tag
	tag, err := names.ParseTag(entity.Tag())
	c.Assert(err, jc.ErrorIsNil)
	info.Tag = tag
	info.Password = "******"
	err = tryOpenState(s.State.ModelTag(), info)
	c.Assert(errors.Cause(err), jc.Satisfies, errors.IsUnauthorized)
}
Esempio n. 3
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File: manifold.go Progetto: bac/juju
// newWorker trivially wraps NewWorker for use in a engine.AgentAPIManifold.
func newWorker(a agent.Agent, apiCaller base.APICaller) (worker.Worker, error) {
	cfg := a.CurrentConfig()

	// Grab the tag and ensure that it's for a machine.
	tag, ok := cfg.Tag().(names.MachineTag)
	if !ok {
		return nil, errors.New("this manifold may only be used inside a machine agent")
	}

	// Get the machine agent's jobs.
	entity, err := apiagent.NewState(apiCaller).Entity(tag)
	if err != nil {
		return nil, err
	}

	var isModelManager bool
	for _, job := range entity.Jobs() {
		if job == multiwatcher.JobManageModel {
			isModelManager = true
			break
		}
	}

	if !isModelManager {
		return nil, dependency.ErrMissing
	}

	return NewWorker(cfg)
}
Esempio n. 4
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func (s *servingInfoSuite) TestIsMasterPermission(c *gc.C) {
	st, _ := s.OpenAPIAsNewMachine(c)
	_, err := apiagent.NewState(st).IsMaster()
	c.Assert(errors.Cause(err), gc.DeepEquals, &rpc.RequestError{
		Message: "permission denied",
		Code:    "unauthorized access",
	})
}
Esempio n. 5
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// manifoldStart creates a *Tracker given a base.APICaller.
func manifoldStart(apiCaller base.APICaller) (worker.Worker, error) {
	w, err := NewTracker(Config{
		Observer: agent.NewState(apiCaller),
	})
	if err != nil {
		return nil, errors.Trace(err)
	}
	return w, nil
}
Esempio n. 6
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func (s *modelSuite) SetUpTest(c *gc.C) {
	s.JujuConnSuite.SetUpTest(c)

	conn, _ := s.OpenAPIAsNewMachine(c)
	agentAPI := apiagent.NewState(conn)
	c.Assert(agentAPI, gc.NotNil)

	s.ModelWatcherTests = apitesting.NewModelWatcherTests(
		agentAPI, s.BackingState, apitesting.NoSecrets)
}
Esempio n. 7
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// ServingInfoSetterManifold defines a simple start function which
// runs after the API connection has come up. If the machine agent is
// a controller, it grabs the state serving info over the API and
// records it to agent configuration, and then stops.
func ServingInfoSetterManifold(config ServingInfoSetterConfig) dependency.Manifold {
	return dependency.Manifold{
		Inputs: []string{
			config.AgentName,
			config.APICallerName,
		},
		Start: func(context dependency.Context) (worker.Worker, error) {
			// Get the agent.
			var agent coreagent.Agent
			if err := context.Get(config.AgentName, &agent); err != nil {
				return nil, err
			}

			// Grab the tag and ensure that it's for a machine.
			tag, ok := agent.CurrentConfig().Tag().(names.MachineTag)
			if !ok {
				return nil, errors.New("agent's tag is not a machine tag")
			}

			// Get API connection.
			var apiCaller base.APICaller
			if err := context.Get(config.APICallerName, &apiCaller); err != nil {
				return nil, err
			}
			apiState := apiagent.NewState(apiCaller)

			// If the machine needs State, grab the state serving info
			// over the API and write it to the agent configuration.
			machine, err := apiState.Entity(tag)
			if err != nil {
				return nil, err
			}
			for _, job := range machine.Jobs() {
				if job.NeedsState() {
					info, err := apiState.StateServingInfo()
					if err != nil {
						return nil, errors.Errorf("cannot get state serving info: %v", err)
					}
					err = agent.ChangeConfig(func(config coreagent.ConfigSetter) error {
						config.SetStateServingInfo(info)
						return nil
					})
					if err != nil {
						return nil, err
					}
				}
			}

			// All is well - we're done (no actual worker is actually returned).
			return nil, dependency.ErrUninstall
		},
	}
}
Esempio n. 8
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File: manifold.go Progetto: bac/juju
// isModelManager returns whether the agent has JobManageModel,
// or an error.
func isModelManager(a agent.Agent, apiCaller base.APICaller) (bool, error) {
	agentFacade := apiagent.NewState(apiCaller)
	entity, err := agentFacade.Entity(a.CurrentConfig().Tag())
	if err != nil {
		return false, errors.Trace(err)
	}
	for _, job := range entity.Jobs() {
		if job == multiwatcher.JobManageModel {
			return true, nil
		}
	}
	return false, nil
}
Esempio n. 9
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func (s *machineSuite) TestMachineEntity(c *gc.C) {
	tag := names.NewMachineTag("42")
	m, err := apiagent.NewState(s.st).Entity(tag)
	c.Assert(err, gc.ErrorMatches, "permission denied")
	c.Assert(err, jc.Satisfies, params.IsCodeUnauthorized)
	c.Assert(m, gc.IsNil)

	m, err = apiagent.NewState(s.st).Entity(s.machine.Tag())
	c.Assert(err, jc.ErrorIsNil)
	c.Assert(m.Tag(), gc.Equals, s.machine.Tag().String())
	c.Assert(m.Life(), gc.Equals, params.Alive)
	c.Assert(m.Jobs(), gc.DeepEquals, []multiwatcher.MachineJob{multiwatcher.JobHostUnits})

	err = s.machine.EnsureDead()
	c.Assert(err, jc.ErrorIsNil)
	err = s.machine.Remove()
	c.Assert(err, jc.ErrorIsNil)

	m, err = apiagent.NewState(s.st).Entity(s.machine.Tag())
	c.Assert(err, gc.ErrorMatches, fmt.Sprintf("machine %s not found", s.machine.Id()))
	c.Assert(err, jc.Satisfies, params.IsCodeNotFound)
	c.Assert(m, gc.IsNil)
}
Esempio n. 10
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func (s *unitSuite) TestUnitEntity(c *gc.C) {
	tag := names.NewUnitTag("wordpress/1")
	m, err := apiagent.NewState(s.st).Entity(tag)
	c.Assert(err, gc.ErrorMatches, "permission denied")
	c.Assert(err, jc.Satisfies, params.IsCodeUnauthorized)
	c.Assert(m, gc.IsNil)

	m, err = apiagent.NewState(s.st).Entity(s.unit.Tag())
	c.Assert(err, jc.ErrorIsNil)
	c.Assert(m.Tag(), gc.Equals, s.unit.Tag().String())
	c.Assert(m.Life(), gc.Equals, params.Alive)
	c.Assert(m.Jobs(), gc.HasLen, 0)

	err = s.unit.EnsureDead()
	c.Assert(err, jc.ErrorIsNil)
	err = s.unit.Remove()
	c.Assert(err, jc.ErrorIsNil)

	m, err = apiagent.NewState(s.st).Entity(s.unit.Tag())
	c.Assert(err, gc.ErrorMatches, fmt.Sprintf("unit %q not found", s.unit.Name()))
	c.Assert(err, jc.Satisfies, params.IsCodeNotFound)
	c.Assert(m, gc.IsNil)
}
Esempio n. 11
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File: manifold.go Progetto: bac/juju
func newWorker(a agent.Agent, apiCaller base.APICaller) (worker.Worker, error) {
	st := apiagent.NewState(apiCaller)
	isMM, err := isModelManager(a, st)
	if err != nil {
		return nil, errors.Trace(err)
	}
	if !isMM {
		return nil, dependency.ErrMissing
	}

	// 4 times a day seems a decent enough amount of checks.
	checkerParams := VersionCheckerParams{
		CheckInterval: time.Hour * 6,
	}
	return New(agenttools.NewFacade(apiCaller), &checkerParams), nil
}
Esempio n. 12
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func (s *servingInfoSuite) TestIsMaster(c *gc.C) {
	calledIsMaster := false
	var fakeMongoIsMaster = func(session *mgo.Session, m mongo.WithAddresses) (bool, error) {
		calledIsMaster = true
		return true, nil
	}
	s.PatchValue(&apiserveragent.MongoIsMaster, fakeMongoIsMaster)

	st, _ := s.OpenAPIAsNewMachine(c, state.JobManageModel)
	expected := true
	result, err := apiagent.NewState(st).IsMaster()

	c.Assert(err, jc.ErrorIsNil)
	c.Assert(result, gc.Equals, expected)
	c.Assert(calledIsMaster, jc.IsTrue)
}
Esempio n. 13
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// Manifold returns a dependency manifold that runs a deployer worker,
// using the resource names defined in the supplied config.
func Manifold(config ManifoldConfig) dependency.Manifold {

	// newWorker trivially wraps NewDeployer for use in a util.PostUpgradeManifold.
	//
	// It's not tested at the moment, because the scaffolding
	// necessary is too unwieldy/distracting to introduce at this point.
	newWorker := func(a agent.Agent, apiCaller base.APICaller) (worker.Worker, error) {
		cfg := a.CurrentConfig()
		// Grab the tag and ensure that it's for a machine.
		tag, ok := cfg.Tag().(names.MachineTag)
		if !ok {
			return nil, errors.New("agent's tag is not a machine tag")
		}

		// Get the machine agent's jobs.
		// TODO(fwereade): this functionality should be on the
		// deployer facade instead.
		agentFacade := apiagent.NewState(apiCaller)
		entity, err := agentFacade.Entity(tag)
		if err != nil {
			return nil, err
		}

		var isUnitHoster bool
		for _, job := range entity.Jobs() {
			if job == multiwatcher.JobHostUnits {
				isUnitHoster = true
				break
			}
		}

		if !isUnitHoster {
			return nil, dependency.ErrUninstall
		}

		deployerFacade := apideployer.NewState(apiCaller)
		context := config.NewDeployContext(deployerFacade, cfg)
		w, err := NewDeployer(deployerFacade, context)
		if err != nil {
			return nil, errors.Annotate(err, "cannot start unit agent deployer worker")
		}
		return w, nil
	}

	return util.PostUpgradeManifold(config.PostUpgradeManifoldConfig, newWorker)
}
Esempio n. 14
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func (s *machineSuite) TestClearReboot(c *gc.C) {
	err := s.machine.SetRebootFlag(true)
	c.Assert(err, jc.ErrorIsNil)
	rFlag, err := s.machine.GetRebootFlag()
	c.Assert(err, jc.ErrorIsNil)
	c.Assert(rFlag, jc.IsTrue)

	entity, err := apiagent.NewState(s.st).Entity(s.machine.Tag())
	c.Assert(err, jc.ErrorIsNil)

	err = entity.ClearReboot()
	c.Assert(err, jc.ErrorIsNil)

	rFlag, err = s.machine.GetRebootFlag()
	c.Assert(err, jc.ErrorIsNil)
	c.Assert(rFlag, jc.IsFalse)
}
Esempio n. 15
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// Manifold returns a dependency manifold that runs a machiner worker, using
// the resource names defined in the supplied config.
func Manifold(config ManifoldConfig) dependency.Manifold {

	// TODO(waigani) This function is currently covered by functional tests
	// under the machine agent. Add unit tests once infrastructure to do so is
	// in place.

	// newWorker non-trivially wraps NewMachiner to specialise a PostUpgradeManifold.
	var newWorker = func(a agent.Agent, apiCaller base.APICaller) (worker.Worker, error) {
		currentConfig := a.CurrentConfig()

		// TODO(fwereade): this functionality should be on the
		// deployer facade instead.
		agentFacade := apiagent.NewState(apiCaller)
		envConfig, err := agentFacade.ModelConfig()
		if err != nil {
			return nil, errors.Errorf("cannot read environment config: %v", err)
		}

		ignoreMachineAddresses, _ := envConfig.IgnoreMachineAddresses()
		// Containers only have machine addresses, so we can't ignore them.
		tag := currentConfig.Tag()
		if names.IsContainerMachine(tag.Id()) {
			ignoreMachineAddresses = false
		}
		if ignoreMachineAddresses {
			logger.Infof("machine addresses not used, only addresses from provider")
		}
		accessor := APIMachineAccessor{apimachiner.NewState(apiCaller)}
		w, err := NewMachiner(Config{
			MachineAccessor: accessor,
			Tag:             tag.(names.MachineTag),
			ClearMachineAddressesOnStart: ignoreMachineAddresses,
			NotifyMachineDead: func() error {
				return agent.SetCanUninstall(a)
			},
		})
		if err != nil {
			return nil, errors.Annotate(err, "cannot start machiner worker")
		}
		return w, err
	}

	return util.PostUpgradeManifold(config.PostUpgradeManifoldConfig, newWorker)
}
Esempio n. 16
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File: manifold.go Progetto: bac/juju
// Manifold returns a dependency manifold that runs a log forwarding
// worker, using the resource names defined in the supplied config.
func Manifold(config ManifoldConfig) dependency.Manifold {
	openLogStream := config.OpenLogStream
	if openLogStream == nil {
		openLogStream = func(caller base.APICaller, cfg params.LogStreamConfig, controllerUUID string) (LogStream, error) {
			return logstream.Open(caller, cfg, controllerUUID)
		}
	}

	openForwarder := config.OpenLogForwarder
	if openForwarder == nil {
		openForwarder = NewLogForwarder
	}

	return dependency.Manifold{
		Inputs: []string{
			config.StateName, // ...just to force it to run only on the controller.
			config.APICallerName,
		},
		Start: func(context dependency.Context) (worker.Worker, error) {
			var apiCaller base.APICaller
			if err := context.Get(config.APICallerName, &apiCaller); err != nil {
				return nil, errors.Trace(err)
			}

			agentFacade := apiagent.NewState(apiCaller)
			controllerCfg, err := agentFacade.ControllerConfig()
			if err != nil {
				return nil, errors.Annotate(err, "cannot read controller config")
			}

			orchestrator, err := newOrchestratorForController(OrchestratorArgs{
				ControllerUUID:   controllerCfg.ControllerUUID(),
				LogForwardConfig: agentFacade,
				Caller:           apiCaller,
				Sinks:            config.Sinks,
				OpenLogStream:    openLogStream,
				OpenLogForwarder: openForwarder,
			})
			return orchestrator, errors.Annotate(err, "creating log forwarding orchestrator")
		},
	}
}
Esempio n. 17
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func (s *servingInfoSuite) TestStateServingInfo(c *gc.C) {
	st, _ := s.OpenAPIAsNewMachine(c, state.JobManageModel)

	ssi := state.StateServingInfo{
		PrivateKey:   "some key",
		Cert:         "Some cert",
		SharedSecret: "really, really secret",
		APIPort:      33,
		StatePort:    44,
	}
	expected := params.StateServingInfo{
		PrivateKey:   ssi.PrivateKey,
		Cert:         ssi.Cert,
		SharedSecret: ssi.SharedSecret,
		APIPort:      ssi.APIPort,
		StatePort:    ssi.StatePort,
	}
	s.State.SetStateServingInfo(ssi)
	info, err := apiagent.NewState(st).StateServingInfo()
	c.Assert(err, jc.ErrorIsNil)
	c.Assert(info, jc.DeepEquals, expected)
}
Esempio n. 18
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// newWorker non-trivially wraps NewMachiner to specialise a util.AgentApiManifold.
//
// TODO(waigani) This function is currently covered by functional tests
// under the machine agent. Add unit tests once infrastructure to do so is
// in place.
func newWorker(a agent.Agent, apiCaller base.APICaller) (worker.Worker, error) {
	currentConfig := a.CurrentConfig()

	// TODO(fwereade): this functionality should be on the
	// machiner facade instead -- or, better yet, separate
	// the networking concerns from the lifecycle ones and
	// have completey separate workers.
	//
	// (With their own facades.)
	agentFacade := apiagent.NewState(apiCaller)
	envConfig, err := agentFacade.ModelConfig()
	if err != nil {
		return nil, errors.Errorf("cannot read environment config: %v", err)
	}

	ignoreMachineAddresses, _ := envConfig.IgnoreMachineAddresses()
	// Containers only have machine addresses, so we can't ignore them.
	tag := currentConfig.Tag()
	if names.IsContainerMachine(tag.Id()) {
		ignoreMachineAddresses = false
	}
	if ignoreMachineAddresses {
		logger.Infof("machine addresses not used, only addresses from provider")
	}
	accessor := APIMachineAccessor{apimachiner.NewState(apiCaller)}
	w, err := NewMachiner(Config{
		MachineAccessor: accessor,
		Tag:             tag.(names.MachineTag),
		ClearMachineAddressesOnStart: ignoreMachineAddresses,
		NotifyMachineDead: func() error {
			return agent.SetCanUninstall(a)
		},
	})
	if err != nil {
		return nil, errors.Annotate(err, "cannot start machiner worker")
	}
	return w, err
}
Esempio n. 19
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// Manifold returns a Manifold that encapsulates a *Tracker and exposes it as
// an environs.Environ resource.
func Manifold(config ManifoldConfig) dependency.Manifold {
	manifold := dependency.Manifold{
		Inputs: []string{
			config.APICallerName,
		},
		Output: manifoldOutput,
		Start: func(getResource dependency.GetResourceFunc) (worker.Worker, error) {
			var apiCaller base.APICaller
			if err := getResource(config.APICallerName, &apiCaller); err != nil {
				return nil, errors.Trace(err)
			}
			w, err := NewTracker(Config{
				Observer:       agent.NewState(apiCaller),
				NewEnvironFunc: config.NewEnvironFunc,
			})
			if err != nil {
				return nil, errors.Trace(err)
			}
			return w, nil
		},
	}
	return manifold
}
Esempio n. 20
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// newWorker trivially wraps NewDeployer for use in a engine.AgentApiManifold.
//
// It's not tested at the moment, because the scaffolding
// necessary is too unwieldy/distracting to introduce at this point.
func (config ManifoldConfig) newWorker(a agent.Agent, apiCaller base.APICaller) (worker.Worker, error) {
	cfg := a.CurrentConfig()
	// Grab the tag and ensure that it's for a machine.
	tag, ok := cfg.Tag().(names.MachineTag)
	if !ok {
		return nil, errors.New("agent's tag is not a machine tag")
	}

	// Get the machine agent's jobs.
	// TODO(fwereade): this functionality should be on the
	// deployer facade instead.
	agentFacade := apiagent.NewState(apiCaller)
	entity, err := agentFacade.Entity(tag)
	if err != nil {
		return nil, err
	}

	var isUnitHoster bool
	for _, job := range entity.Jobs() {
		if job == multiwatcher.JobHostUnits {
			isUnitHoster = true
			break
		}
	}

	if !isUnitHoster {
		return nil, dependency.ErrUninstall
	}

	deployerFacade := apideployer.NewState(apiCaller)
	context := config.NewDeployContext(deployerFacade, cfg)
	w, err := NewDeployer(deployerFacade, context)
	if err != nil {
		return nil, errors.Annotate(err, "cannot start unit agent deployer worker")
	}
	return w, nil
}
Esempio n. 21
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// Agent returns a version of the state that provides
// functionality required by the agent code.
func (st *State) Agent() *agent.State {
	return agent.NewState(st)
}
Esempio n. 22
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// ServingInfoSetterManifold defines a simple start function which
// runs after the API connection has come up. If the machine agent is
// a controller, it grabs the state serving info over the API and
// records it to agent configuration, and then stops.
func ServingInfoSetterManifold(config ServingInfoSetterConfig) dependency.Manifold {
	return dependency.Manifold{
		Inputs: []string{
			config.AgentName,
			config.APICallerName,
		},
		Start: func(context dependency.Context) (worker.Worker, error) {
			// Get the agent.
			var agent coreagent.Agent
			if err := context.Get(config.AgentName, &agent); err != nil {
				return nil, err
			}

			// Grab the tag and ensure that it's for a machine.
			tag, ok := agent.CurrentConfig().Tag().(names.MachineTag)
			if !ok {
				return nil, errors.New("agent's tag is not a machine tag")
			}

			// Get API connection.
			var apiCaller base.APICaller
			if err := context.Get(config.APICallerName, &apiCaller); err != nil {
				return nil, err
			}
			apiState := apiagent.NewState(apiCaller)

			// If the machine needs State, grab the state serving info
			// over the API and write it to the agent configuration.
			if controller, err := isController(apiState, tag); err != nil {
				return nil, errors.Annotate(err, "checking controller status")
			} else if !controller {
				// Not a controller, nothing to do.
				return nil, dependency.ErrUninstall
			}

			info, err := apiState.StateServingInfo()
			if err != nil {
				return nil, errors.Annotate(err, "getting state serving info")
			}
			err = agent.ChangeConfig(func(config coreagent.ConfigSetter) error {
				existing, hasInfo := config.StateServingInfo()
				if hasInfo {
					// Use the existing cert and key as they appear to
					// have been already updated by the cert updater
					// worker to have this machine's IP address as
					// part of the cert. This changed cert is never
					// put back into the database, so it isn't
					// reflected in the copy we have got from
					// apiState.
					info.Cert = existing.Cert
					info.PrivateKey = existing.PrivateKey
				}
				config.SetStateServingInfo(info)
				return nil
			})
			if err != nil {
				return nil, errors.Trace(err)
			}

			// All is well - we're done (no actual worker is actually returned).
			return nil, dependency.ErrUninstall
		},
	}
}
Esempio n. 23
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func (f *fakeAPIConn) Agent() *apiagent.State {
	return apiagent.NewState(f)
}
Esempio n. 24
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// Manifold returns a dependency manifold that runs an upgrader
// worker, using the resource names defined in the supplied config.
func Manifold(config ManifoldConfig) dependency.Manifold {
	return dependency.Manifold{
		Inputs: []string{
			config.AgentName,
			config.APICallerName,
			config.UpgradeStepsGateName,
		},
		Start: func(getResource dependency.GetResourceFunc) (worker.Worker, error) {
			// Sanity checks
			if config.OpenStateForUpgrade == nil {
				return nil, errors.New("missing OpenStateForUpgrade in config")
			}
			if config.PreUpgradeSteps == nil {
				return nil, errors.New("missing PreUpgradeSteps in config")
			}

			// Get machine agent.
			var agent agent.Agent
			if err := getResource(config.AgentName, &agent); err != nil {
				return nil, err
			}

			// Grab the tag and ensure that it's for a machine.
			tag, ok := agent.CurrentConfig().Tag().(names.MachineTag)
			if !ok {
				return nil, errors.New("agent's tag is not a machine tag")
			}

			// Get API connection.
			// TODO(fwereade): can we make the worker use an
			// APICaller instead? should be able to depend on
			// the Engine to abort us when conn is closed...
			var apiConn api.Connection
			if err := getResource(config.APICallerName, &apiConn); err != nil {
				return nil, err
			}

			// Get the machine agent's jobs.
			// TODO(fwereade): use appropriate facade!
			agentFacade := apiagent.NewState(apiConn)
			entity, err := agentFacade.Entity(tag)
			if err != nil {
				return nil, err
			}
			jobs := entity.Jobs()

			// Get machine instance for setting status on.
			// TODO(fwereade): use appropriate facade!
			machinerFacade := apimachiner.NewState(apiConn)
			machine, err := machinerFacade.Machine(tag)
			if err != nil {
				return nil, err
			}

			// Get upgradesteps completed lock.
			var upgradeStepsLock gate.Lock
			if err := getResource(config.UpgradeStepsGateName, &upgradeStepsLock); err != nil {
				return nil, err
			}

			return NewWorker(
				upgradeStepsLock,
				agent,
				apiConn,
				jobs,
				config.OpenStateForUpgrade,
				config.PreUpgradeSteps,
				machine,
			)
		},
	}
}
Esempio n. 25
0
// startAPIWorkers is called to start workers which rely on the
// machine agent's API connection (via the apiworkers manifold). It
// returns a Runner with a number of workers attached to it.
//
// The workers started here need to be converted to run under the
// dependency engine. Once they have all been converted, this method -
// and the apiworkers manifold - can be removed.
func (a *MachineAgent) startAPIWorkers(apiConn api.Connection) (_ worker.Worker, outErr error) {
	agentConfig := a.CurrentConfig()

	entity, err := apiagent.NewState(apiConn).Entity(a.Tag())
	if err != nil {
		return nil, errors.Trace(err)
	}

	var isModelManager bool
	for _, job := range entity.Jobs() {
		switch job {
		case multiwatcher.JobManageModel:
			isModelManager = true
		default:
			// TODO(dimitern): Once all workers moved over to using
			// the API, report "unknown job type" here.
		}
	}

	runner := newConnRunner(apiConn)
	defer func() {
		// If startAPIWorkers exits early with an error, stop the
		// runner so that any already started runners aren't leaked.
		if outErr != nil {
			worker.Stop(runner)
		}
	}()

	modelConfig, err := apiagent.NewState(apiConn).ModelConfig()
	if err != nil {
		return nil, fmt.Errorf("cannot read model config: %v", err)
	}

	// Perform the operations needed to set up hosting for containers.
	if err := a.setupContainerSupport(runner, apiConn, agentConfig); err != nil {
		cause := errors.Cause(err)
		if params.IsCodeDead(cause) || cause == worker.ErrTerminateAgent {
			return nil, worker.ErrTerminateAgent
		}
		return nil, fmt.Errorf("setting up container support: %v", err)
	}

	if isModelManager {

		// Published image metadata for some providers are in simple streams.
		// Providers that do not depend on simple streams do not need this worker.
		env, err := newEnvirons(modelConfig)
		if err != nil {
			return nil, errors.Annotate(err, "getting environ")
		}
		if _, ok := env.(simplestreams.HasRegion); ok {
			// Start worker that stores published image metadata in state.
			runner.StartWorker("imagemetadata", func() (worker.Worker, error) {
				return newMetadataUpdater(apiConn.MetadataUpdater()), nil
			})
		}

		// We don't have instance info set and the network config for the
		// bootstrap machine only, so update it now. All the other machines will
		// have instance info including network config set at provisioning time.
		if err := a.setControllerNetworkConfig(apiConn); err != nil {
			return nil, errors.Annotate(err, "setting controller network config")
		}
	} else {
		runner.StartWorker("stateconverter", func() (worker.Worker, error) {
			// TODO(fwereade): this worker needs its own facade.
			facade := apimachiner.NewState(apiConn)
			handler := conv2state.New(facade, a)
			w, err := watcher.NewNotifyWorker(watcher.NotifyConfig{
				Handler: handler,
			})
			if err != nil {
				return nil, errors.Annotate(err, "cannot start controller promoter worker")
			}
			return w, nil
		})
	}
	return runner, nil
}
Esempio n. 26
0
// ServingInfoSetterManifold defines a simple start function which
// runs after the API connection has come up. If the machine agent is
// a controller, it grabs the state serving info over the API and
// records it to agent configuration, and then stops.
func ServingInfoSetterManifold(config ServingInfoSetterConfig) dependency.Manifold {
	return dependency.Manifold{
		Inputs: []string{
			config.AgentName,
			config.APICallerName,
		},
		Start: func(context dependency.Context) (worker.Worker, error) {
			// Get the agent.
			var agent coreagent.Agent
			if err := context.Get(config.AgentName, &agent); err != nil {
				return nil, err
			}

			// Grab the tag and ensure that it's for a machine.
			tag, ok := agent.CurrentConfig().Tag().(names.MachineTag)
			if !ok {
				return nil, errors.New("agent's tag is not a machine tag")
			}

			// Get API connection.
			var apiCaller base.APICaller
			if err := context.Get(config.APICallerName, &apiCaller); err != nil {
				return nil, err
			}
			apiState := apiagent.NewState(apiCaller)

			// If the machine needs State, grab the state serving info
			// over the API and write it to the agent configuration.
			machine, err := apiState.Entity(tag)
			if err != nil {
				return nil, err
			}
			existing, hasInfo := agent.CurrentConfig().StateServingInfo()
			for _, job := range machine.Jobs() {
				if job.NeedsState() {
					info, err := apiState.StateServingInfo()
					if err != nil {
						return nil, errors.Errorf("cannot get state serving info: %v", err)
					}
					if hasInfo {
						// Use the existing Cert as it may have been updated already
						// by the cert updater worker to have this machine's IP address
						// as part of the cert. This changed cert is never put back into
						// the database, so it isn't reflected in the copy we have got
						// from apiState.
						info.Cert = existing.Cert
					}
					err = agent.ChangeConfig(func(config coreagent.ConfigSetter) error {
						config.SetStateServingInfo(info)
						return nil
					})
					if err != nil {
						return nil, err
					}
				}
			}

			// All is well - we're done (no actual worker is actually returned).
			return nil, dependency.ErrUninstall
		},
	}
}