helm源码分析之dependency build

谁借莪１个温暖的怀抱￠ 2023-03-04 04:29 10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 newDependencyBuildCmd(out io.Writer) *cobra.Command {//创建dependency build命令
    	client := action.NewDependency()//初始化结构体
    
    	cmd := &cobra.Command{//创建cobra命令
    		Use:   "build CHART",
    		Short: "rebuild the charts/ directory based on the Chart.lock file",
    		Long:  dependencyBuildDesc,
    		Args:  require.MaximumNArgs(1),
    		RunE: func(cmd *cobra.Command, args []string) error {
    			chartpath := "."//设置chartpath
    			if len(args) > 0 {//如果参数大于0个，则设置chartpath为第一个参数
    				chartpath = filepath.Clean(args[0])
    			}
    			man := &downloader.Manager{//构造manager
    				Out:              out,
    				ChartPath:        chartpath,
    				Keyring:          client.Keyring,
    				Getters:          getter.All(settings),
    				RepositoryConfig: settings.RepositoryConfig,
    				RepositoryCache:  settings.RepositoryCache,
    				Debug:            settings.Debug,
    			}
    			if client.Verify {//设置verify
    				man.Verify = downloader.VerifyIfPossible
    			}
    			return man.Build()//执行构造
    		},
    	}
    
    	f := cmd.Flags()
    	f.BoolVar(&client.Verify, "verify", false, "verify the packages against signatures")//verify选项
    	f.StringVar(&client.Keyring, "keyring", defaultKeyring(), "keyring containing public keys")//keyring选项
    
    	return cmd
    }

func (m *Manager) Build() error {//执行构造
    	c, err := m.loadChartDir()//加载chart
    	if err != nil {
    		return err
    	}
    
    	// If a lock file is found, run a build from that. Otherwise, just do
    	// an update.
    	lock := c.Lock//获取lock
    	if lock == nil {//如果lock为空，执行更新
    		return m.Update()
    	}
    
    	// Check that all of the repos we're dependent on actually exist.
    	req := c.Metadata.Dependencies//获取依赖
    	if _, err := m.resolveRepoNames(req); err != nil {//解析依赖仓库名称
    		return err
    	}
    
    	if sum, err := resolver.HashReq(req, lock.Dependencies); err != nil || sum != lock.Digest {//判断hash是否相同
    		// If lock digest differs and chart is apiVersion v1, it maybe because the lock was built
    		// with Helm 2 and therefore should be checked with Helm v2 hash
    		// Fix for: https://github.com/helm/helm/issues/7233
    		if c.Metadata.APIVersion == chart.APIVersionV1 {//如果是v1版本api
    			log.Println("warning: a valid Helm v3 hash was not found. Checking against Helm v2 hash...")
    			if sum, err := resolver.HashV2Req(req); err != nil || sum != lock.Digest {//检查v2版本hash是否相同
    				return errors.New("the lock file (requirements.lock) is out of sync with the dependencies file (requirements.yaml). Please update the dependencies")//hash不同返回错误
    			}
    		} else {//如果是v3版本，返回错误
    			return errors.New("the lock file (Chart.lock) is out of sync with the dependencies file (Chart.yaml). Please update the dependencies")
    		}
    	}
    
    	// Check that all of the repos we're dependent on actually exist.
    	if err := m.hasAllRepos(lock.Dependencies); err != nil {//判断依赖仓库是否都存在
    		return err
    	}
    
    	if !m.SkipUpdate {//如果不跳过更新仓库
    		// For each repo in the file, update the cached copy of that repo
    		if err := m.UpdateRepositories(); err != nil {//更新仓库
    			return err
    		}
    	}
    
    	// Now we need to fetch every package here into charts/
    	return m.downloadAll(lock.Dependencies)//下载依赖
    }

[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAaHhwamF2YTE_size_8_color_FFFFFF_t_70_g_se_x_16]: /images/20230208/ddf4cc4e18ea4110aac82f54df9268fd.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