func (s *CommonProvisionerSuite) newEnvironProvisioner(c *gc.C) provisioner.Provisioner {
	machineTag := names.NewMachineTag("0")
	agentConfig := s.AgentConfigForTag(c, machineTag)
	apiState := apiprovisioner.NewState(s.st)
	w, err := provisioner.NewEnvironProvisioner(apiState, agentConfig, s.Environ)
	c.Assert(err, jc.ErrorIsNil)
	return w
}

func (s *ContainerSetupSuite) SetUpTest(c *gc.C) {
	s.CommonProvisionerSuite.SetUpTest(c)
	aptCmdChan := s.HookCommandOutput(&apt.CommandOutput, []byte{}, nil)
	s.aptCmdChan = aptCmdChan

	// Set up provisioner for the state machine.
	s.agentConfig = s.AgentConfigForTag(c, names.NewMachineTag("0"))
	s.p = provisioner.NewEnvironProvisioner(s.provisioner, s.agentConfig)

	// Create a new container initialisation lock.
	s.initLockDir = c.MkDir()
	initLock, err := fslock.NewLock(s.initLockDir, "container-init")
	c.Assert(err, gc.IsNil)
	s.initLock = initLock
}

func (s *ContainerSetupSuite) SetUpTest(c *gc.C) {
	s.CommonProvisionerSuite.SetUpTest(c)
	aptCmdChan := s.HookCommandOutput(&manager.CommandOutput, []byte{}, nil)
	s.aptCmdChan = aptCmdChan

	// Set up provisioner for the state machine.
	s.agentConfig = s.AgentConfigForTag(c, names.NewMachineTag("0"))
	s.p = provisioner.NewEnvironProvisioner(s.provisioner, s.agentConfig)

	// Create a new container initialisation lock.
	s.initLockDir = c.MkDir()
	initLock, err := fslock.NewLock(s.initLockDir, "container-init")
	c.Assert(err, jc.ErrorIsNil)
	s.initLock = initLock

	// Patch to isolate the test from the host machine.
	s.fakeLXCNet = filepath.Join(c.MkDir(), "lxc-net")
	s.PatchValue(provisioner.EtcDefaultLXCNetPath, s.fakeLXCNet)
}

func (s *CommonProvisionerSuite) newEnvironProvisioner(c *gc.C) provisioner.Provisioner {
	machineTag := names.NewMachineTag("0")
	agentConfig := s.AgentConfigForTag(c, machineTag)
	return provisioner.NewEnvironProvisioner(s.provisioner, agentConfig)
}

//.........这里部分代码省略.........

	// Before starting any workers, ensure we record the Juju version this machine
	// agent is running.
	currentTools := &coretools.Tools{Version: version.Current}
	if err := st.Upgrader().SetVersion(agentConfig.Tag().String(), currentTools.Version); err != nil {
		return nil, errors.Annotate(err, "cannot set machine agent version")
	}

	providerType := agentConfig.Value(agent.ProviderType)

	// 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,
			a.previousAgentVersion,
			a.upgradeWorkerContext.IsUpgradeRunning,
		), nil
	})
	runner.StartWorker("upgrade-steps", func() (worker.Worker, error) {
		return a.upgradeWorkerContext.Worker(a, st, entity.Jobs()), 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)
	})
	// TODO (mfoord 8/8/2014) improve the way we detect networking capabilities. Bug lp:1354365
	writeNetworkConfig := providerType == "maas"
	if disableNetworkManagement || !writeNetworkConfig {
		a.startWorkerAfterUpgrade(runner, "networker", func() (worker.Worker, error) {
			return newSafeNetworker(st.Networker(), agentConfig, networker.DefaultConfigDir)
		})
	} else if !disableNetworkManagement && writeNetworkConfig {
		a.startWorkerAfterUpgrade(runner, "networker", func() (worker.Worker, error) {
			return newNetworker(st.Networker(), agentConfig, networker.DefaultConfigDir)
		})
	}

	// If not a local provider bootstrap machine, start the worker to
	// manage SSH keys.
	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 {
		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)
	}
	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.
}