helm源码分析之dependency list 命令

叁歲伎倆 2023-03-03 05:56 74阅读 0赞

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![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]

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func newDependencyCmd(out io.Writer) *cobra.Command {//创建dependency命令
    	cmd := &cobra.Command{//创建cobra命令
    		Use:     "dependency update|build|list",
    		Aliases: []string{"dep", "dependencies"},
    		Short:   "manage a chart's dependencies",
    		Long:    dependencyDesc,
    		Args:    require.NoArgs,
    	}
    
    	cmd.AddCommand(newDependencyListCmd(out))//添加list命令
    	cmd.AddCommand(newDependencyUpdateCmd(out))//添加update命令
    	cmd.AddCommand(newDependencyBuildCmd(out))//添加build命令
    
    	return cmd
    }

func newDependencyListCmd(out io.Writer) *cobra.Command {//创建dependency list命令
    	client := action.NewDependency()//初始化结构体
    
    	cmd := &cobra.Command{//创建cobra命令
    		Use:     "list CHART",
    		Aliases: []string{"ls"},
    		Short:   "list the dependencies for the given chart",
    		Long:    dependencyListDesc,
    		Args:    require.MaximumNArgs(1),
    		RunE: func(cmd *cobra.Command, args []string) error {
    			chartpath := "."//设置chartpath
    			if len(args) > 0 {//如果参数个数大于0个，则设置第0个参数为chartpath
    				chartpath = filepath.Clean(args[0])
    			}
    			return client.List(chartpath, out)//运行命令
    		},
    	}
    	return cmd
    }

type Dependency struct {//dependency结构体
    	Verify      bool
    	Keyring     string
    	SkipRefresh bool
    }
    
    // NewDependency creates a new Dependency object with the given configuration.
    func NewDependency() *Dependency {//初始化结构体
    	return &Dependency{}
    }

func (d *Dependency) List(chartpath string, out io.Writer) error {//list denendency
    	c, err := loader.Load(chartpath)//加载chart
    	if err != nil {
    		return err
    	}
    
    	if c.Metadata.Dependencies == nil {//如果chart没有dependency则打印告警，返回
    		fmt.Fprintf(out, "WARNING: no dependencies at %s\n", filepath.Join(chartpath, "charts"))
    		return nil
    	}
    
    	d.printDependencies(chartpath, out, c.Metadata.Dependencies)//打印依赖
    	fmt.Fprintln(out)
      	d.printMissing(chartpath, out, c.Metadata.Dependencies)//打印丢失的依赖
    	return nil
    }

//打印依赖
    func (d *Dependency) printDependencies(chartpath string, out io.Writer, reqs []*chart.Dependency) {
    	table := uitable.New()//创建table
    	table.MaxColWidth = 80//设置宽度
    	table.AddRow("NAME", "VERSION", "REPOSITORY", "STATUS")// 添加头
    	for _, row := range reqs {// 打印依赖
    		table.AddRow(row.Name, row.Version, row.Repository, d.dependencyStatus(chartpath, row))
    	}
    	fmt.Fprintln(out, table)//打印表格
    }

//打印丢失的依赖
    func (d *Dependency) printMissing(chartpath string, out io.Writer, reqs []*chart.Dependency) {
    	folder := filepath.Join(chartpath, "charts/*")//获取charts目录
    	files, err := filepath.Glob(folder)//获取charts目录文件
    	if err != nil {
    		fmt.Fprintln(out, err)
    		return
    	}
    
    	for _, f := range files {//遍历文件
    		fi, err := os.Stat(f)//判断文件状态
    		if err != nil {
    			fmt.Fprintf(out, "Warning: %s\n", err)
    		}
    		// Skip anything that is not a directory and not a tgz file.
    		if !fi.IsDir() && filepath.Ext(f) != ".tgz" {//判断文件是否是目录或tgz文件
    			continue
    		}
    		c, err := loader.Load(f)//加载chart
    		if err != nil {
    			fmt.Fprintf(out, "WARNING: %q is not a chart.\n", f)
    			continue
    		}
    		found := false
    		for _, d := range reqs {//遍历依赖
    			if d.Name == c.Name() {//如果依赖名称和chart名称相同则找到
    				found = true
    				break
    			}
    		}
    		if !found {//没找到则打印告警
    			fmt.Fprintf(out, "WARNING: %q is not in Chart.yaml.\n", f)
    		}
    	}
    }

[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAaHhwamF2YTE_size_8_color_FFFFFF_t_70_g_se_x_16]: /images/20230208/0dc8dbc80a9444159a412b7b0fb2135d.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