kubectl源码分析之create priorityclass

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 目前刚开始写一个月，一共写了18篇原创文章，文章目录如下：

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istio防故障利器，你知道几个,istio新手不要读，太难！

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不懂envoyfilter也敢说精通istio系列-http-rbac-不要只会用AuthorizationPolicy配置权限

不懂envoyfilter也敢说精通istio系列-02-http-corsFilter-不要只会vs

不懂envoyfilter也敢说精通istio系列-03-http-csrf filter-再也不用再代码里写csrf逻辑了

不懂envoyfilter也敢说精通istio系列http-jwt_authn-不要只会RequestAuthorization

不懂envoyfilter也敢说精通istio系列-05-fault-filter-故障注入不止是vs

不懂envoyfilter也敢说精通istio系列-06-http-match-配置路由不只是vs

不懂envoyfilter也敢说精通istio系列-07-负载均衡配置不止是dr

不懂envoyfilter也敢说精通istio系列-08-连接池和断路器

不懂envoyfilter也敢说精通istio系列-09-http-route filter

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不懂envoyfilter也敢说精通istio系列-ratelimit-istio ratelimit完全手册

 

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type PriorityClassOpts struct {//pc结构体
	CreateSubcommandOptions *CreateSubcommandOptions
}

//创建pc命令
func NewCmdCreatePriorityClass(f cmdutil.Factory, ioStreams genericclioptions.IOStreams) *cobra.Command {
	options := &PriorityClassOpts{//初始化pc结构体
		CreateSubcommandOptions: NewCreateSubcommandOptions(ioStreams),
	}

	cmd := &cobra.Command{//创建cobra命令
		Use:                   "priorityclass NAME --value=VALUE --global-default=BOOL [--dry-run]",
		DisableFlagsInUseLine: true,
		Aliases:               []string{"pc"},
		Short:                 i18n.T("Create a priorityclass with the specified name."),
		Long:                  pcLong,
		Example:               pcExample,
		Run: func(cmd *cobra.Command, args []string) {
			cmdutil.CheckErr(options.Complete(f, cmd, args))//准备运行
			cmdutil.CheckErr(options.Run())//运行命令
		},
	}

	options.CreateSubcommandOptions.PrintFlags.AddFlags(cmd)//设置print选项

	cmdutil.AddApplyAnnotationFlags(cmd)//设置save-config选项
	cmdutil.AddValidateFlags(cmd)//设置valdate选项
	cmdutil.AddGeneratorFlags(cmd, generateversioned.PriorityClassV1GeneratorName)//设置generator选项

	cmd.Flags().Int32("value", 0, i18n.T("the value of this priority class."))//设置value选项
	cmd.Flags().Bool("global-default", false, i18n.T("global-default specifies whether this PriorityClass should be considered as the default priority."))//设置global-default选项
	cmd.Flags().String("description", "", i18n.T("description is an arbitrary string that usually provides guidelines on when this priority class should be used."))//设置description选项
	cmd.Flags().String("preemption-policy", "", i18n.T("preemption-policy is the policy for preempting pods with lower priority."))//设置preemption-policy选项
	return cmd
}

//准备运行
func (o *PriorityClassOpts) Complete(f cmdutil.Factory, cmd *cobra.Command, args []string) error {
	name, err := NameFromCommandArgs(cmd, args)//获取名称
	if err != nil {
		return err
	}

	var generator generate.StructuredGenerator
	switch generatorName := cmdutil.GetFlagString(cmd, "generator"); generatorName {
	case generateversioned.PriorityClassV1GeneratorName://湖区generator名称并判断
		generator = &generateversioned.PriorityClassV1Generator{
			Name:             name,
			Value:            cmdutil.GetFlagInt32(cmd, "value"),
			GlobalDefault:    cmdutil.GetFlagBool(cmd, "global-default"),
			Description:      cmdutil.GetFlagString(cmd, "description"),
			PreemptionPolicy: apiv1.PreemptionPolicy(cmdutil.GetFlagString(cmd, "preemption-policy")),
		}
	default:
		return errUnsupportedGenerator(cmd, generatorName)
	}

	return o.CreateSubcommandOptions.Complete(f, cmd, args, generator)//运行createSubCommandOption的complete方法
}

// Run calls the CreateSubcommandOptions.Run in the PriorityClassOpts instance
func (o *PriorityClassOpts) Run() error {//运行命令
	return o.CreateSubcommandOptions.Run()//运行createSubCommandOption的run方法
}