Golang Environ.BootstrapMessage方法代码示例

// BootstrapInstance creates a new instance with the series of its choice,
// constrained to those of the available tools, and
// returns the instance result, series, and a function that
// must be called to finalize the bootstrap process by transferring
// the tools and installing the initial Juju controller.
// This method is called by Bootstrap above, which implements environs.Bootstrap, but
// is also exported so that providers can manipulate the started instance.
func BootstrapInstance(ctx environs.BootstrapContext, env environs.Environ, args environs.BootstrapParams,
) (_ *environs.StartInstanceResult, selectedSeries string, _ environs.BootstrapFinalizer, err error) {
	// TODO make safe in the case of racing Bootstraps
	// If two Bootstraps are called concurrently, there's
	// no way to make sure that only one succeeds.

	// First thing, ensure we have tools otherwise there's no point.
	if args.BootstrapSeries != "" {
		selectedSeries = args.BootstrapSeries
	} else {
		selectedSeries = config.PreferredSeries(env.Config())
	}
	availableTools, err := args.AvailableTools.Match(coretools.Filter{
		Series: selectedSeries,
	})
	if err != nil {
		return nil, "", nil, err
	}

	// Filter image metadata to the selected series.
	var imageMetadata []*imagemetadata.ImageMetadata
	seriesVersion, err := series.SeriesVersion(selectedSeries)
	if err != nil {
		return nil, "", nil, errors.Trace(err)
	}
	for _, m := range args.ImageMetadata {
		if m.Version != seriesVersion {
			continue
		}
		imageMetadata = append(imageMetadata, m)
	}

	// Get the bootstrap SSH client. Do this early, so we know
	// not to bother with any of the below if we can't finish the job.
	client := ssh.DefaultClient
	if client == nil {
		// This should never happen: if we don't have OpenSSH, then
		// go.crypto/ssh should be used with an auto-generated key.
		return nil, "", nil, fmt.Errorf("no SSH client available")
	}

	publicKey, err := simplestreams.UserPublicSigningKey()
	if err != nil {
		return nil, "", nil, err
	}
	envCfg := env.Config()
	instanceConfig, err := instancecfg.NewBootstrapInstanceConfig(
		args.ControllerConfig, args.BootstrapConstraints, args.ModelConstraints, selectedSeries, publicKey,
	)
	if err != nil {
		return nil, "", nil, err
	}
	instanceConfig.EnableOSRefreshUpdate = env.Config().EnableOSRefreshUpdate()
	instanceConfig.EnableOSUpgrade = env.Config().EnableOSUpgrade()

	instanceConfig.Tags = instancecfg.InstanceTags(envCfg.UUID(), args.ControllerConfig.ControllerUUID(), envCfg, instanceConfig.Jobs)
	maybeSetBridge := func(icfg *instancecfg.InstanceConfig) {
		// If we need to override the default bridge name, do it now. When
		// args.ContainerBridgeName is empty, the default names for LXC
		// (lxcbr0) and KVM (virbr0) will be used.
		if args.ContainerBridgeName != "" {
			logger.Debugf("using %q as network bridge for all container types", args.ContainerBridgeName)
			if icfg.AgentEnvironment == nil {
				icfg.AgentEnvironment = make(map[string]string)
			}
			icfg.AgentEnvironment[agent.LxcBridge] = args.ContainerBridgeName
		}
	}
	maybeSetBridge(instanceConfig)

	bootstrapMsg := env.BootstrapMessage()
	if bootstrapMsg != "" {
		ctx.Infof(bootstrapMsg)
	}

	cloudRegion := args.CloudName
	if args.CloudRegion != "" {
		cloudRegion += "/" + args.CloudRegion
	}
	fmt.Fprintf(ctx.GetStderr(), "Launching controller instance(s) on %s...\n", cloudRegion)
	// Print instance status reports status changes during provisioning.
	// Note the carriage returns, meaning subsequent prints are to the same
	// line of stderr, not a new line.
	instanceStatus := func(settableStatus status.Status, info string, data map[string]interface{}) error {
		// The data arg is not expected to be used in this case, but
		// print it, rather than ignore it, if we get something.
		dataString := ""
		if len(data) > 0 {
			dataString = fmt.Sprintf(" %v", data)
		}
		fmt.Fprintf(ctx.GetStderr(), " - %s%s\r", info, dataString)
		return nil
	}
//.........这里部分代码省略.........