Golang tools.List类代码示例

func assertToolsList(c *gc.C, list tools.List, expected []version.Binary) {
	urls := list.URLs()
	c.Check(urls, gc.HasLen, len(expected))
	for _, vers := range expected {
		c.Assert(urls[vers], gc.Not(gc.Equals), "")
	}
}

// internalStartInstance allocates and starts a MAAS node.  It is used both
// for the implementation of StartInstance, and to initialize the bootstrap
// node.
// The instance will be set up for the same series for which you pass tools.
// All tools in possibleTools must be for the same series.
// machineConfig will be filled out with further details, but should contain
// MachineID, MachineNonce, StateInfo, and APIInfo.
// TODO(bug 1199847): Some of this work can be shared between providers.
func (environ *maasEnviron) internalStartInstance(cons constraints.Value, possibleTools tools.List, machineConfig *cloudinit.MachineConfig) (_ *maasInstance, err error) {
	series := possibleTools.Series()
	if len(series) != 1 {
		panic(fmt.Errorf("should have gotten tools for one series, got %v", series))
	}
	var instance *maasInstance
	if node, tools, err := environ.acquireNode(cons, possibleTools); err != nil {
		return nil, fmt.Errorf("cannot run instances: %v", err)
	} else {
		instance = &maasInstance{&node, environ}
		machineConfig.Tools = tools
	}
	defer func() {
		if err != nil {
			if err := environ.releaseInstance(instance); err != nil {
				logger.Errorf("error releasing failed instance: %v", err)
			}
		}
	}()

	hostname, err := instance.DNSName()
	if err != nil {
		return nil, err
	}
	info := machineInfo{hostname}
	runCmd, err := info.cloudinitRunCmd()
	if err != nil {
		return nil, err
	}
	if err := environs.FinishMachineConfig(machineConfig, environ.Config(), cons); err != nil {
		return nil, err
	}
	// Explicitly specify that the lxc containers use the network bridge defined above.
	machineConfig.MachineEnvironment[osenv.JujuLxcBridge] = "br0"
	userdata, err := environs.ComposeUserData(
		machineConfig,
		runCmd,
		createBridgeNetwork(),
		"service networking restart",
	)
	if err != nil {
		msg := fmt.Errorf("could not compose userdata for bootstrap node: %v", err)
		return nil, msg
	}
	logger.Debugf("maas user data; %d bytes", len(userdata))

	if err := environ.startNode(*instance.maasObject, series[0], userdata); err != nil {
		return nil, err
	}
	logger.Debugf("started instance %q", instance.Id())
	return instance, nil
}

// CheckToolsSeries verifies that all the given possible tools are for the
// given OS series.
func CheckToolsSeries(tools tools.List, series string) error {
	toolsSeries := tools.Series()
	if len(toolsSeries) != 1 {
		return fmt.Errorf("expected single series, got %v", toolsSeries)
	}
	if toolsSeries[0] != series {
		return fmt.Errorf("tools mismatch: expected series %v, got %v", series, toolsSeries[0])
	}
	return nil
}

func (s *ListSuite) TestURLs(c *gc.C) {
	empty := tools.List{}
	c.Check(empty.URLs(), gc.DeepEquals, map[version.Binary]string{})

	full := tools.List{t100precise, t190quantal, t2001precise}
	c.Check(full.URLs(), gc.DeepEquals, map[version.Binary]string{
		t100precise.Binary:  t100precise.URL,
		t190quantal.Binary:  t190quantal.URL,
		t2001precise.Binary: t2001precise.URL,
	})
}

// internalStartInstance is the internal version of StartInstance, used by
// Bootstrap as well as via StartInstance itself.
// machineConfig will be filled out with further details, but should contain
// MachineID, MachineNonce, StateInfo, and APIInfo.
// TODO(bug 1199847): Some of this work can be shared between providers.
func (e *environ) internalStartInstance(cons constraints.Value, possibleTools tools.List, machineConfig *cloudinit.MachineConfig) (instance.Instance, *instance.HardwareCharacteristics, error) {
	series := possibleTools.Series()
	if len(series) != 1 {
		panic(fmt.Errorf("should have gotten tools for one series, got %v", series))
	}
	arches := possibleTools.Arches()
	spec, err := findInstanceSpec(e, &instances.InstanceConstraint{
		Region:      e.ecfg().region(),
		Series:      series[0],
		Arches:      arches,
		Constraints: cons,
	})
	if err != nil {
		return nil, nil, err
	}
	tools, err := possibleTools.Match(tools.Filter{Arch: spec.Image.Arch})
	if err != nil {
		return nil, nil, fmt.Errorf("chosen architecture %v not present in %v", spec.Image.Arch, arches)
	}

	machineConfig.Tools = tools[0]

	if err := environs.FinishMachineConfig(machineConfig, e.Config(), cons); err != nil {
		return nil, nil, err
	}
	userData, err := environs.ComposeUserData(machineConfig)
	if err != nil {
		return nil, nil, fmt.Errorf("cannot make user data: %v", err)
	}
	log.Debugf("environs/openstack: openstack user data; %d bytes", len(userData))
	withPublicIP := e.ecfg().useFloatingIP()
	var publicIP *nova.FloatingIP
	if withPublicIP {
		if fip, err := e.allocatePublicIP(); err != nil {
			return nil, nil, fmt.Errorf("cannot allocate a public IP as needed: %v", err)
		} else {
			publicIP = fip
			log.Infof("environs/openstack: allocated public IP %s", publicIP.IP)
		}
	}
	config := e.Config()
	groups, err := e.setUpGroups(machineConfig.MachineId, config.StatePort(), config.APIPort())
	if err != nil {
		return nil, nil, fmt.Errorf("cannot set up groups: %v", err)
	}
	var groupNames = make([]nova.SecurityGroupName, len(groups))
	for i, g := range groups {
		groupNames[i] = nova.SecurityGroupName{g.Name}
	}

	var server *nova.Entity
	for a := shortAttempt.Start(); a.Next(); {
		server, err = e.nova().RunServer(nova.RunServerOpts{
			Name:               e.machineFullName(machineConfig.MachineId),
			FlavorId:           spec.InstanceType.Id,
			ImageId:            spec.Image.Id,
			UserData:           userData,
			SecurityGroupNames: groupNames,
		})
		if err == nil || !gooseerrors.IsNotFound(err) {
			break
		}
	}
	if err != nil {
		return nil, nil, fmt.Errorf("cannot run instance: %v", err)
	}
	detail, err := e.nova().GetServer(server.Id)
	if err != nil {
		return nil, nil, fmt.Errorf("cannot get started instance: %v", err)
	}
	inst := &openstackInstance{
		e:            e,
		ServerDetail: detail,
		arch:         &spec.Image.Arch,
		instType:     &spec.InstanceType,
	}
	log.Infof("environs/openstack: started instance %q", inst.Id())
	if withPublicIP {
		if err := e.assignPublicIP(publicIP, string(inst.Id())); err != nil {
			if err := e.terminateInstances([]instance.Id{inst.Id()}); err != nil {
				// ignore the failure at this stage, just log it
				log.Debugf("environs/openstack: failed to terminate instance %q: %v", inst.Id(), err)
			}
			return nil, nil, fmt.Errorf("cannot assign public address %s to instance %q: %v", publicIP.IP, inst.Id(), err)
		}
		log.Infof("environs/openstack: assigned public IP %s to %q", publicIP.IP, inst.Id())
	}
	return inst, inst.hardwareCharacteristics(), nil
}

// internalStartInstance is the internal version of StartInstance, used by
// Bootstrap as well as via StartInstance itself.
// TODO(bug 1199847): Some of this work can be shared between providers.
func (e *environ) internalStartInstance(cons constraints.Value, possibleTools tools.List, machineConfig *cloudinit.MachineConfig) (instance.Instance, *instance.HardwareCharacteristics, error) {
	series := possibleTools.Series()
	if len(series) != 1 {
		panic(fmt.Errorf("should have gotten tools for one series, got %v", series))
	}
	arches := possibleTools.Arches()
	storage := ebsStorage
	baseURLs, err := e.getImageBaseURLs()
	if err != nil {
		return nil, nil, err
	}
	spec, err := findInstanceSpec(baseURLs, &instances.InstanceConstraint{
		Region:      e.ecfg().region(),
		Series:      series[0],
		Arches:      arches,
		Constraints: cons,
		Storage:     &storage,
	})
	if err != nil {
		return nil, nil, err
	}
	tools, err := possibleTools.Match(tools.Filter{Arch: spec.Image.Arch})
	if err != nil {
		return nil, nil, fmt.Errorf("chosen architecture %v not present in %v", spec.Image.Arch, arches)
	}

	machineConfig.Tools = tools[0]
	if err := environs.FinishMachineConfig(machineConfig, e.Config(), cons); err != nil {
		return nil, nil, err
	}

	userData, err := environs.ComposeUserData(machineConfig)
	if err != nil {
		return nil, nil, fmt.Errorf("cannot make user data: %v", err)
	}
	log.Debugf("environs/ec2: ec2 user data; %d bytes", len(userData))
	config := e.Config()
	groups, err := e.setUpGroups(machineConfig.MachineId, config.StatePort(), config.APIPort())
	if err != nil {
		return nil, nil, fmt.Errorf("cannot set up groups: %v", err)
	}
	var instances *ec2.RunInstancesResp

	for a := shortAttempt.Start(); a.Next(); {
		instances, err = e.ec2().RunInstances(&ec2.RunInstances{
			ImageId:        spec.Image.Id,
			MinCount:       1,
			MaxCount:       1,
			UserData:       userData,
			InstanceType:   spec.InstanceType.Name,
			SecurityGroups: groups,
		})
		if err == nil || ec2ErrCode(err) != "InvalidGroup.NotFound" {
			break
		}
	}
	if err != nil {
		return nil, nil, fmt.Errorf("cannot run instances: %v", err)
	}
	if len(instances.Instances) != 1 {
		return nil, nil, fmt.Errorf("expected 1 started instance, got %d", len(instances.Instances))
	}
	inst := &ec2Instance{
		e:        e,
		Instance: &instances.Instances[0],
		arch:     &spec.Image.Arch,
		instType: &spec.InstanceType,
	}
	log.Infof("environs/ec2: started instance %q", inst.Id())
	return inst, inst.hardwareCharacteristics(), nil
}

// internalStartInstance does the provider-specific work of starting an
// instance.  The code in StartInstance is actually largely agnostic across
// the EC2/OpenStack/MAAS/Azure providers.
// The instance will be set up for the same series for which you pass tools.
// All tools in possibleTools must be for the same series.
// machineConfig will be filled out with further details, but should contain
// MachineID, MachineNonce, StateInfo, and APIInfo.
// TODO(bug 1199847): Some of this work can be shared between providers.
func (env *azureEnviron) internalStartInstance(cons constraints.Value, possibleTools tools.List, machineConfig *cloudinit.MachineConfig) (_ instance.Instance, err error) {
	// Declaring "err" in the function signature so that we can "defer"
	// any cleanup that needs to run during error returns.

	series := possibleTools.Series()
	if len(series) != 1 {
		panic(fmt.Errorf("should have gotten tools for one series, got %v", series))
	}

	err = environs.FinishMachineConfig(machineConfig, env.Config(), cons)
	if err != nil {
		return nil, err
	}

	// Pick tools.  Needed for the custom data (which is what we normally
	// call userdata).
	machineConfig.Tools = possibleTools[0]
	logger.Infof("picked tools %q", machineConfig.Tools)

	// Compose userdata.
	userData, err := makeCustomData(machineConfig)
	if err != nil {
		return nil, fmt.Errorf("custom data: %v", err)
	}

	azure, err := env.getManagementAPI()
	if err != nil {
		return nil, err
	}
	defer env.releaseManagementAPI(azure)

	snap := env.getSnapshot()
	location := snap.ecfg.Location()
	service, err := newHostedService(azure.ManagementAPI, env.getEnvPrefix(), env.getAffinityGroupName(), location)
	if err != nil {
		return nil, err
	}
	serviceName := service.ServiceName

	// If we fail after this point, clean up the hosted service.
	defer func() {
		if err != nil {
			azure.DestroyHostedService(
				&gwacl.DestroyHostedServiceRequest{
					ServiceName: serviceName,
				})
		}
	}()

	instanceType, err := selectMachineType(gwacl.RoleSizes, cons)
	if err != nil {
		return nil, err
	}

	// TODO: use simplestreams to get the name of the image given
	// the constraints provided by Juju.
	// In the meantime we use a temporary Saucy image containing a
	// cloud-init package which supports Azure, see the boilerplate config
	// for its exact name.
	sourceImageName := snap.ecfg.ForceImageName()

	// virtualNetworkName is the virtual network to which all the
	// deployments in this environment belong.
	virtualNetworkName := env.getVirtualNetworkName()

	// 1. Create an OS Disk.
	vhd := env.newOSDisk(sourceImageName)

	// 2. Create a Role for a Linux machine.
	role := env.newRole(instanceType.Name, vhd, userData, roleHostname)

	// 3. Create the Deployment object.
	deployment := env.newDeployment(role, serviceName, serviceName, virtualNetworkName)

	err = azure.AddDeployment(deployment, serviceName)
	if err != nil {
		return nil, err
	}

	var inst instance.Instance

	// From here on, remember to shut down the instance before returning
	// any error.
	defer func() {
		if err != nil && inst != nil {
			err2 := env.StopInstances([]instance.Instance{inst})
			if err2 != nil {
				// Failure upon failure.  Log it, but return
				// the original error.
				logger.Errorf("error releasing failed instance: %v", err)
			}
		}
//.........这里部分代码省略.........