kubectl源码分析之create configmap

kubectl源码分析之create configmap

课程内容：各种k8s部署方式。包括minikube部署，kubeadm部署，kubeasz部署，rancher部署，k3s部署。包括开发测试环境部署k8s，和生产环境部署k8s。

介绍主要的k8s资源的使用配置和命令。包括configmap，pod，service，replicaset，namespace，deployment，daemonset，ingress，pv，pvc，sc，role，rolebinding，clusterrole，clusterrolebinding，secret，serviceaccount，statefulset，job，cronjob，podDisruptionbudget，podSecurityPolicy,networkPolicy,resourceQuota，limitrange，endpoint，event，conponentstatus，node，apiservice，controllerRevision等。

本课程将详细介绍k8s所有命令，以及命令的go源码分析，学习知其然，知其所以然 ————————————————

type ConfigMapOpts struct {//选项结构体 CreateSubcommandOptions *CreateSubcommandOptions}

//创建configmap cobra命令func NewCmdCreateConfigMap(f cmdutil.Factory, ioStreams genericclioptions.IOStreams) *cobra.Command { options := &ConfigMapOpts{//初始化选项结构体 CreateSubcommandOptions: NewCreateSubcommandOptions(ioStreams), } cmd := &cobra.Command{//创建cobra命令 Use: "configmap NAME [--from-file=[key=]source] [--from-literal=key1=value1] [--dry-run]", DisableFlagsInUseLine: true, Aliases: []string{"cm"}, Short: i18n.T("Create a configmap from a local file, directory or literal value"), Long: configMapLong, Example: configMapExample, Run: func(cmd *cobra.Command, args []string) { cmdutil.CheckErr(options.Complete(f, cmd, args))//准备 cmdutil.CheckErr(options.Run())//运行命令 }, } options.CreateSubcommandOptions.PrintFlags.AddFlags(cmd)//创建print flag选项 cmdutil.AddApplyAnnotationFlags(cmd)//创建save-config选项 cmdutil.AddValidateFlags(cmd)//创建validate选项 cmdutil.AddGeneratorFlags(cmd, generateversioned.ConfigMapV1GeneratorName)//创建generator选项 cmd.Flags().StringSlice("from-file", []string{}, "Key file can be specified using its file path, in which case file basename will be used as configmap key, or optionally with a key and file path, in which case the given key will be used. Specifying a directory will iterate each named file in the directory whose basename is a valid configmap key.")//创建from-file选项 cmd.Flags().StringArray("from-literal", []string{}, "Specify a key and literal value to insert in configmap (i.e. mykey=somevalue)")//创建from-literal选项 cmd.Flags().String("from-env-file", "", "Specify the path to a file to read lines of key=val pairs to create a configmap (i.e. a Docker .env file).")//创建from-env-file选项 cmd.Flags().Bool("append-hash", false, "Append a hash of the configmap to its name.")//创建append-hash选项 return cmd}

//做一些准备工作func (o *ConfigMapOpts) Complete(f cmdutil.Factory, cmd *cobra.Command, args []string) error { name, err := NameFromCommandArgs(cmd, args)//从参数获取资源名称 if err != nil { return err } var generator generate.StructuredGenerator switch generatorName := cmdutil.GetFlagString(cmd, "generator"); generatorName { case generateversioned.ConfigMapV1GeneratorName://获取generator选项并判断 generator = &generateversioned.ConfigMapGeneratorV1{//构造generator对象 Name: name, FileSources: cmdutil.GetFlagStringSlice(cmd, "from-file"), LiteralSources: cmdutil.GetFlagStringArray(cmd, "from-literal"), EnvFileSource: cmdutil.GetFlagString(cmd, "from-env-file"), AppendHash: cmdutil.GetFlagBool(cmd, "append-hash"), } default: return errUnsupportedGenerator(cmd, generatorName) } return o.CreateSubcommandOptions.Complete(f, cmd, args, generator)//运行createSubCommandoption的complete}

其他和上一个命令一样，不做介绍

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