helm v3源码分析之总体

「爱情、让人受尽委屈。」 2023-03-02 10:57 49阅读 0赞

#  欢迎关注我的公众号： #

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAaHhwamF2YTE_size_8_color_FFFFFF_t_70_g_se_x_16][]

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：

[istio多集群探秘，部署了50次多集群后我得出的结论][istio_50]

[istio多集群链路追踪，附实操视频][istio]

[istio防故障利器，你知道几个,istio新手不要读，太难！][istio_istio]

[istio业务权限控制，原来可以这么玩][istio 1]

[istio实现非侵入压缩，微服务之间如何实现压缩][istio 2]

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

[不懂envoyfilter也敢说精通istio系列-02-http-corsFilter-不要只会vs][envoyfilter_istio_-02-http-corsFilter-_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][envoyfilter_istio_-03-http-csrf filter-_csrf]

[不懂envoyfilter也敢说精通istio系列http-jwt\_authn-不要只会RequestAuthorization][envoyfilter_istio_http-jwt_authn-_RequestAuthorization]

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

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

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

[不懂envoyfilter也敢说精通istio系列-08-连接池和断路器][envoyfilter_istio_-08-]

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

[不懂envoyfilter也敢说精通istio系列-network filter-redis proxy][envoyfilter_istio_-network filter-redis proxy]

[不懂envoyfilter也敢说精通istio系列-network filter-HttpConnectionManager][envoyfilter_istio_-network filter-HttpConnectionManager]

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

\-----------------------------------------------------------------------------------------------------

func main() {//程序入口
    	initKubeLogs()//初始化kube日志
    
    	actionConfig := new(action.Configuration)
    	cmd := newRootCmd(actionConfig, os.Stdout, os.Args[1:])//创建根命令
    
    	if err := actionConfig.Init(settings.RESTClientGetter(), settings.Namespace(), os.Getenv("HELM_DRIVER"), debug); err != nil {//初始化
    		log.Fatal(err)
    	}
    
    	if err := cmd.Execute(); err != nil {执行命令
    		debug("%+v", err)
    		switch e := err.(type) {
    		case pluginError:
    			os.Exit(e.code)
    		default:
    			os.Exit(1)
    		}
    	}
    }

func newRootCmd(actionConfig *action.Configuration, out io.Writer, args []string) *cobra.Command {//获取根命令
    	cmd := &cobra.Command{//创建cobra命令
    		Use:                    "helm",
    		Short:                  "The Helm package manager for Kubernetes.",
    		Long:                   globalUsage,
    		SilenceUsage:           true,
    		Args:                   require.NoArgs,
    		BashCompletionFunction: fmt.Sprintf("%s%s", contextCompFunc, completion.GetBashCustomFunction()),
    	}
    	flags := cmd.PersistentFlags()
    
    	settings.AddFlags(flags)//添加选项
    
    	flag := flags.Lookup("namespace")
    	// Setup shell completion for the namespace flag
    	completion.RegisterFlagCompletionFunc(flag, func(cmd *cobra.Command, args []string, toComplete string) ([]string, completion.BashCompDirective) {//自动补全
    		if client, err := actionConfig.KubernetesClientSet(); err == nil {
    			// Choose a long enough timeout that the user notices somethings is not working
    			// but short enough that the user is not made to wait very long
    			to := int64(3)
    			completion.CompDebugln(fmt.Sprintf("About to call kube client for namespaces with timeout of: %d", to))
    
    			nsNames := []string{}
    			if namespaces, err := client.CoreV1().Namespaces().List(metav1.ListOptions{TimeoutSeconds: &to}); err == nil {
    				for _, ns := range namespaces.Items {
    					if strings.HasPrefix(ns.Name, toComplete) {
    						nsNames = append(nsNames, ns.Name)
    					}
    				}
    				return nsNames, completion.BashCompDirectiveNoFileComp
    			}
    		}
    		return nil, completion.BashCompDirectiveDefault
    	})
    
    	// We can safely ignore any errors that flags.Parse encounters since
    	// those errors will be caught later during the call to cmd.Execution.
    	// This call is required to gather configuration information prior to
    	// execution.
    	flags.ParseErrorsWhitelist.UnknownFlags = true
    	flags.Parse(args)
    
    	// Add subcommands
    	cmd.AddCommand(//添加子命令
    		// chart commands
    		newCreateCmd(out),// 添加create命令
    		newDependencyCmd(out),// 添加dependency命令
    		newPullCmd(out),//添加pull命令
    		newShowCmd(out),//添加show命令
    		newLintCmd(out),//添加lint命令
    		newPackageCmd(out),//添加package命令
    		newRepoCmd(out),//添加repo命令
    		newSearchCmd(out),//添加search命令
    		newVerifyCmd(out),//添加verify命令
    
    		// release commands
    		newGetCmd(actionConfig, out),//添加get命令
    		newHistoryCmd(actionConfig, out),//添加history命令
    		newInstallCmd(actionConfig, out),//添加install命令
    		newListCmd(actionConfig, out),//添加list命令
    		newReleaseTestCmd(actionConfig, out),//添加test命令
    		newRollbackCmd(actionConfig, out),//添加rollback命令
    		newStatusCmd(actionConfig, out),//添加status命令
    		newTemplateCmd(actionConfig, out),//添加template命令
    		newUninstallCmd(actionConfig, out),//添加uninstall命令
    		newUpgradeCmd(actionConfig, out),//添加upgrade命令
    
    		newCompletionCmd(out),//添加completion命令
    		newEnvCmd(out),//添加env命令
    		newPluginCmd(out),//添加plugin命令
    		newVersionCmd(out),// 添加version命令
    
    		// Hidden documentation generator command: 'helm docs'
    		newDocsCmd(out),//添加docs命令
    
    		// Setup the special hidden __complete command to allow for dynamic auto-completion
    		completion.NewCompleteCmd(settings, out),
    	)
    
    	// Add annotation to flags for which we can generate completion choices
    	for name, completion := range bashCompletionFlags {
    		if cmd.Flag(name) != nil {
    			if cmd.Flag(name).Annotations == nil {
    				cmd.Flag(name).Annotations = map[string][]string{}
    			}
    			cmd.Flag(name).Annotations[cobra.BashCompCustom] = append(
    				cmd.Flag(name).Annotations[cobra.BashCompCustom],
    				completion,
    			)
    		}
    	}
    
    	// Add *experimental* subcommands
    	registryClient, err := registry.NewClient(
    		registry.ClientOptDebug(settings.Debug),
    		registry.ClientOptWriter(out),
    	)
    	if err != nil {
    		// TODO: don't panic here, refactor newRootCmd to return error
    		panic(err)
    	}
    	actionConfig.RegistryClient = registryClient
    	cmd.AddCommand(
    		newRegistryCmd(actionConfig, out),//添加registry命令
    		newChartCmd(actionConfig, out),//添加chart命令
    	)
    
    	// Find and add plugins
    	loadPlugins(cmd, out)//加载插件
    
    	return cmd
    }

[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAaHhwamF2YTE_size_8_color_FFFFFF_t_70_g_se_x_16]: /images/20230208/0cafbd4edeef491594595ff6e8ebdd80.png
[istio_50]: https://mp.weixin.qq.com/s/_OPMjmWCDSTlmbAxytg33A
[istio]: https://mp.weixin.qq.com/s/kjvtno_UzJAGr1joxm3tvw
[istio_istio]: https://mp.weixin.qq.com/s/e2-p_NY31Mc5y07S4Bb1JQ
[istio 1]: https://mp.weixin.qq.com/s/iTV0SCQLhSOTYncp3PxoHQ
[istio 2]: https://mp.weixin.qq.com/s/eINlrT242RlAwfuZu1_PcA
[envoyfilter_istio_-http-rbac-_AuthorizationPolicy]: https://mp.weixin.qq.com/s/Q-yTGBNqkjOov49LTXPrPA
[envoyfilter_istio_-02-http-corsFilter-_vs]: https://mp.weixin.qq.com/s/bFMdrT7OKSqoWv8pDXOIqQ
[envoyfilter_istio_-03-http-csrf filter-_csrf]: https://mp.weixin.qq.com/s/dlG9phV-kMMxs4UPzuRNYg
[envoyfilter_istio_http-jwt_authn-_RequestAuthorization]: https://mp.weixin.qq.com/s/IfrJ-FdLYsdhPkDrcO_YXA
[envoyfilter_istio_-05-fault-filter-_vs]: https://mp.weixin.qq.com/s/a4gDXqD8uswgglMwkUph2Q
[envoyfilter_istio_-06-http-match-_vs]: https://mp.weixin.qq.com/s/TpS3DHdcaJiPivIS_jsIGw
[envoyfilter_istio_-07-_dr]: https://mp.weixin.qq.com/s/k-zJm7n7OOKg6MotQJYPAA
[envoyfilter_istio_-08-]: https://mp.weixin.qq.com/s/n_bJ3saNeTtXRprIymhwzg
[envoyfilter_istio_-09-http-route filter]: https://mp.weixin.qq.com/s/JAeZr0BMVQxIrB3S_7Ru0A
[envoyfilter_istio_-network filter-redis proxy]: https://mp.weixin.qq.com/s/B9IPTI8F3q42nVkqbQRlPw
[envoyfilter_istio_-network filter-HttpConnectionManager]: https://mp.weixin.qq.com/s/W3OPQWkCVvuHGS49cTNhlg
[envoyfilter_istio_-ratelimit-istio ratelimit]: https://mp.weixin.qq.com/s/KgiDsELNol27mgZvDbFsqw