Golang StartInstanceParams.DistributionGroup方法代碼示例

// parseAvailabilityZones returns the availability zones that should be
// tried for the given instance spec. If a placement argument was
// provided then only that one is returned. Otherwise the environment is
// queried for available zones. In that case, the resulting list is
// roughly ordered such that the environment's instances are spread
// evenly across the region.
func (env *environ) parseAvailabilityZones(args environs.StartInstanceParams) ([]string, error) {
	if args.Placement != "" {
		// args.Placement will always be a zone name or empty.
		placement, err := env.parsePlacement(args.Placement)
		if err != nil {
			return nil, errors.Trace(err)
		}
		// TODO(ericsnow) Fail if placement.Zone is not in the env's configured region?
		return []string{placement.Zone.Name()}, nil
	}

	// If no availability zone is specified, then automatically spread across
	// the known zones for optimal spread across the instance distribution
	// group.
	var group []instance.Id
	var err error
	if args.DistributionGroup != nil {
		group, err = args.DistributionGroup()
		if err != nil {
			return nil, errors.Trace(err)
		}
	}
	zoneInstances, err := availabilityZoneAllocations(env, group)
	if err != nil {
		return nil, errors.Trace(err)
	}
	logger.Infof("found %d zones: %v", len(zoneInstances), zoneInstances)

	var zoneNames []string
	for _, z := range zoneInstances {
		zoneNames = append(zoneNames, z.ZoneName)
	}

	if len(zoneNames) == 0 {
		return nil, errors.NotFoundf("failed to determine availability zones")
	}

	return zoneNames, nil
}

// StartInstance is specified in the InstanceBroker interface.
func (env *azureEnviron) StartInstance(args environs.StartInstanceParams) (*environs.StartInstanceResult, error) {
	if args.InstanceConfig.HasNetworks() {
		return nil, errors.New("starting instances with networks is not supported yet")
	}

	err := instancecfg.FinishInstanceConfig(args.InstanceConfig, env.Config())
	if err != nil {
		return nil, err
	}

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

	// Compose userdata.
	userData, err := providerinit.ComposeUserData(args.InstanceConfig, nil, AzureRenderer{})
	if err != nil {
		return nil, errors.Annotate(err, "cannot compose user data")
	}

	snapshot := env.getSnapshot()
	location := snapshot.ecfg.location()
	instanceType, sourceImageName, err := env.selectInstanceTypeAndImage(&instances.InstanceConstraint{
		Region:      location,
		Series:      args.Tools.OneSeries(),
		Arches:      args.Tools.Arches(),
		Constraints: args.Constraints,
	})
	if err != nil {
		return nil, err
	}

	// We use the cloud service label as a way to group instances with
	// the same affinity, so that machines can be be allocated to the
	// same availability set.
	var cloudServiceName string
	if args.DistributionGroup != nil && snapshot.ecfg.availabilitySetsEnabled() {
		instanceIds, err := args.DistributionGroup()
		if err != nil {
			return nil, err
		}
		for _, id := range instanceIds {
			cloudServiceName, _ = env.splitInstanceId(id)
			if cloudServiceName != "" {
				break
			}
		}
	}

	vhd, err := env.newOSDisk(sourceImageName, args.InstanceConfig.Series)
	if err != nil {
		return nil, errors.Trace(err)
	}
	// If we're creating machine-0, we'll want to expose port 22.
	// All other machines get an auto-generated public port for SSH.
	stateServer := multiwatcher.AnyJobNeedsState(args.InstanceConfig.Jobs...)
	role, err := env.newRole(instanceType.Id, vhd, stateServer, string(userData), args.InstanceConfig.Series, snapshot)
	if err != nil {
		return nil, errors.Trace(err)
	}
	inst, err := createInstance(env, snapshot.api, role, cloudServiceName, stateServer)
	if err != nil {
		return nil, errors.Trace(err)
	}
	hc := &instance.HardwareCharacteristics{
		Mem:      &instanceType.Mem,
		RootDisk: &instanceType.RootDisk,
		CpuCores: &instanceType.CpuCores,
	}
	if len(instanceType.Arches) == 1 {
		hc.Arch = &instanceType.Arches[0]
	}
	return &environs.StartInstanceResult{
		Instance: inst,
		Hardware: hc,
	}, nil
}

// StartInstance is specified in the InstanceBroker interface.
func (e *Environ) StartInstance(args environs.StartInstanceParams) (*environs.StartInstanceResult, error) {
	var availabilityZones []string
	if args.Placement != "" {
		placement, err := e.parsePlacement(args.Placement)
		if err != nil {
			return nil, err
		}
		if !placement.availabilityZone.State.Available {
			return nil, errors.Errorf("availability zone %q is unavailable", placement.availabilityZone.Name)
		}
		availabilityZones = append(availabilityZones, placement.availabilityZone.Name)
	}

	// If no availability zone is specified, then automatically spread across
	// the known zones for optimal spread across the instance distribution
	// group.
	if len(availabilityZones) == 0 {
		var group []instance.Id
		var err error
		if args.DistributionGroup != nil {
			group, err = args.DistributionGroup()
			if err != nil {
				return nil, err
			}
		}
		zoneInstances, err := availabilityZoneAllocations(e, group)
		if errors.IsNotImplemented(err) {
			// Availability zones are an extension, so we may get a
			// not implemented error; ignore these.
		} else if err != nil {
			return nil, err
		} else {
			for _, zone := range zoneInstances {
				availabilityZones = append(availabilityZones, zone.ZoneName)
			}
		}
		if len(availabilityZones) == 0 {
			// No explicitly selectable zones available, so use an unspecified zone.
			availabilityZones = []string{""}
		}
	}

	series := args.Tools.OneSeries()
	arches := args.Tools.Arches()
	spec, err := findInstanceSpec(e, &instances.InstanceConstraint{
		Region:      e.ecfg().region(),
		Series:      series,
		Arches:      arches,
		Constraints: args.Constraints,
	}, args.ImageMetadata)
	if err != nil {
		return nil, err
	}
	tools, err := args.Tools.Match(tools.Filter{Arch: spec.Image.Arch})
	if err != nil {
		return nil, errors.Errorf("chosen architecture %v not present in %v", spec.Image.Arch, arches)
	}

	if err := args.InstanceConfig.SetTools(tools); err != nil {
		return nil, errors.Trace(err)
	}

	if err := instancecfg.FinishInstanceConfig(args.InstanceConfig, e.Config()); err != nil {
		return nil, err
	}
	cloudcfg, err := e.configurator.GetCloudConfig(args)
	if err != nil {
		return nil, errors.Trace(err)
	}
	userData, err := providerinit.ComposeUserData(args.InstanceConfig, cloudcfg, OpenstackRenderer{})
	if err != nil {
		return nil, errors.Annotate(err, "cannot make user data")
	}
	logger.Debugf("openstack user data; %d bytes", len(userData))

	var networks = e.firewaller.InitialNetworks()
	usingNetwork := e.ecfg().network()
	if usingNetwork != "" {
		networkId, err := e.resolveNetwork(usingNetwork)
		if err != nil {
			return nil, err
		}
		logger.Debugf("using network id %q", networkId)
		networks = append(networks, nova.ServerNetworks{NetworkId: networkId})
	}
	withPublicIP := e.ecfg().useFloatingIP()
	var publicIP *nova.FloatingIP
	if withPublicIP {
		logger.Debugf("allocating public IP address for openstack node")
		if fip, err := e.allocatePublicIP(); err != nil {
			return nil, errors.Annotate(err, "cannot allocate a public IP as needed")
		} else {
			publicIP = fip
			logger.Infof("allocated public IP %s", publicIP.IP)
		}
	}

	cfg := e.Config()
	var groupNames = make([]nova.SecurityGroupName, 0)
//.........這裏部分代碼省略.........