Esempio n. 1
0
// RunScale executes the scaling
func RunScale(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []string, shortOutput bool, options *ScaleOptions) error {
	if len(os.Args) > 1 && os.Args[1] == "resize" {
		printDeprecationWarning("scale", "resize")
	}

	count := cmdutil.GetFlagInt(cmd, "replicas")
	if count < 0 {
		return cmdutil.UsageError(cmd, "--replicas=COUNT is required, and COUNT must be greater than or equal to 0")
	}

	cmdNamespace, enforceNamespace, err := f.DefaultNamespace()
	if err != nil {
		return err
	}

	mapper, typer := f.Object()
	r := resource.NewBuilder(mapper, typer, f.ClientMapperForCommand()).
		ContinueOnError().
		NamespaceParam(cmdNamespace).DefaultNamespace().
		FilenameParam(enforceNamespace, options.Filenames...).
		ResourceTypeOrNameArgs(false, args...).
		Flatten().
		Do()
	err = r.Err()
	if err != nil {
		return err
	}

	infos, err := r.Infos()
	if err != nil {
		return err
	}
	info := infos[0]
	mapping := info.ResourceMapping()
	scaler, err := f.Scaler(mapping)
	if err != nil {
		return err
	}

	resourceVersion := cmdutil.GetFlagString(cmd, "resource-version")
	if len(resourceVersion) != 0 && len(infos) > 1 {
		return fmt.Errorf("cannot use --resource-version with multiple controllers")
	}
	currentSize := cmdutil.GetFlagInt(cmd, "current-replicas")
	if currentSize != -1 && len(infos) > 1 {
		return fmt.Errorf("cannot use --current-replicas with multiple controllers")
	}
	precondition := &kubectl.ScalePrecondition{Size: currentSize, ResourceVersion: resourceVersion}
	retry := kubectl.NewRetryParams(kubectl.Interval, kubectl.Timeout)
	var waitForReplicas *kubectl.RetryParams
	if timeout := cmdutil.GetFlagDuration(cmd, "timeout"); timeout != 0 {
		waitForReplicas = kubectl.NewRetryParams(kubectl.Interval, timeout)
	}

	errs := []error{}
	for _, info := range infos {
		if err := scaler.Scale(info.Namespace, info.Name, uint(count), precondition, retry, waitForReplicas); err != nil {
			errs = append(errs, err)
			continue
		}
		cmdutil.PrintSuccess(mapper, shortOutput, out, info.Mapping.Resource, info.Name, "scaled")
	}

	return utilerrors.NewAggregate(errs)
}