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Dockerfile

@@ -1,17 +1,26 @@
+# 构建 operator 的镜像
 # Build the manager binary
+
+###################### build 阶段 ###########################
+# 获取编译需要的环境，并且将这个阶段（镜像）命名为 builder
 FROM golang:1.19 as builder
+# 参数定义，用户选择性的设置这些参数 TARGETOS="linux" TARGETARCH="amd64|arm64" docker build
 ARG TARGETOS
 ARG TARGETARCH
 
+# 指定工作目录，后续的命令都是在这个目录下进行
 WORKDIR /workspace
 # Copy the Go Modules manifests
+# 拷贝 go 依赖相关的文件
 COPY go.mod go.mod
 COPY go.sum go.sum
 # cache deps before building and copying source so that we don't need to re-download as much
 # and so that source changes don't invalidate our downloaded layer
+# 下载依赖
 RUN go mod download
 
 # Copy the go source
+# 拷贝 operator 相关的文件及文件夹
 COPY main.go main.go
 COPY api/ api/
 COPY controllers/ controllers/
@@ -21,13 +30,20 @@ COPY controllers/ controllers/
 # was called. For example, if we call make docker-build in a local env which has the Apple Silicon M1 SO
 # the docker BUILDPLATFORM arg will be linux/arm64 when for Apple x86 it will be linux/amd64. Therefore,
 # by leaving it empty we can ensure that the container and binary shipped on it will have the same platform.
+# 开始执行构建，这里会产出我们需要的可执行的二进制文件
 RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -a -o manager main.go
 
+######################### 创建运行镜像阶段 ################################
 # Use distroless as minimal base image to package the manager binary
 # Refer to https://github.com/GoogleContainerTools/distroless for more details
+# 定义运行镜像的来源
 FROM gcr.io/distroless/static:nonroot
+# 指定工作目录，后续的执行都在此目录下
 WORKDIR /
-COPY --from=builder /workspace/manager .
+# 从 builder 阶段（镜像）中拷贝之前生成的可执行二进制文件
+COPY --from=builder /workspace/manager
+# 设置运行的账户
 USER 65532:65532
 
+# 设置入口文件。如果镜像的时候，我们没有指定运行命令，将会自动运行此命令。
 ENTRYPOINT ["/manager"]

Makefile

@@ -1,6 +1,9 @@
 
 # Image URL to use all building/pushing image targets
+# 镜像的环境变量，如果不设置，将使用controller:latest作文镜像名称。
+# 这个环境变量将会被使用在 构建镜像、推送镜像、部署operator的时候来使用
 IMG ?= controller:latest
+
 # ENVTEST_K8S_VERSION refers to the version of kubebuilder assets to be downloaded by envtest binary.
 ENVTEST_K8S_VERSION = 1.25.0
 

PROJECT

@@ -1,16 +1,16 @@
-domain: mashibing.com
+domain: mashibing.com # 初始化的时候 --domain 的参数
 layout:
-- go.kubebuilder.io/v3
-projectName: demo
-repo: mashibing.com/demo/app
+- go.kubebuilder.io/v3 # 插件名称，决定了生成文件的内容
+projectName: demo # 项目名称，默认值是项目所在文件夹的名称
+repo: mashibing.com/demo/app # 项目的 git repo 地址
 resources:
 - api:
-    crdVersion: v1
-    namespaced: true
-  controller: true
-  domain: mashibing.com
-  group: demo
-  kind: App
-  path: mashibing.com/demo/app/api/v1
-  version: v1
-version: "3"
+    crdVersion: v1 # 版本，创建 api 的时候 --version 的参数
+    namespaced: true # 默认行为，指定这个资源是 namespace
+  controller: true # 创建 api 的时候，是否生成 controller
+  domain: mashibing.com # 和 第一层级中的 domain 相同
+  group: demo # 创建 api 时 --group 的参数。在 operator 中，group 的名称为 <group>.<domain> 也就是说，这里的group名字为 demo.mashibing.com
+  kind: App # 创建 api 时 --kind 的参数
+  path: mashibing.com/demo/app/api/v1 # api 的 pkg 路径
+  version: v1 # api 的版本
+version: "3" # kubebuilder 生成的项目的版本

api/v1/app_types.go

@@ -41,17 +41,19 @@ type AppStatus struct {
 //+kubebuilder:object:root=true
 //+kubebuilder:subresource:status
 
+// 定义我们CRD的对象
 // App is the Schema for the apps API
 type App struct {
-	metav1.TypeMeta   `json:",inline"`
-	metav1.ObjectMeta `json:"metadata,omitempty"`
+	metav1.TypeMeta   `json:",inline"`            // 元信息
+	metav1.ObjectMeta `json:"metadata,omitempty"` // 元信息
 
-	Spec   AppSpec   `json:"spec,omitempty"`
-	Status AppStatus `json:"status,omitempty"`
+	Spec   AppSpec   `json:"spec,omitempty"`   // crd 的核心内容，crd 的描述定义
+	Status AppStatus `json:"status,omitempty"` // crd 现阶段状态的的内容
 }
 
 //+kubebuilder:object:root=true
 
+// 定义我们CRD的列表
 // AppList contains a list of App
 type AppList struct {
 	metav1.TypeMeta `json:",inline"`

api/v1/groupversion_info.go

@@ -25,12 +25,15 @@ import (
 )
 
 var (
+	// 创建GV
 	// GroupVersion is group version used to register these objects
 	GroupVersion = schema.GroupVersion{Group: "demo.mashibing.com", Version: "v1"}
 
+	//用GV开创建 Builder
 	// SchemeBuilder is used to add go types to the GroupVersionKind scheme
 	SchemeBuilder = &scheme.Builder{GroupVersion: GroupVersion}
 
+	// 用Builder 创建Scheme对象的方法
 	// AddToScheme adds the types in this group-version to the given scheme.
 	AddToScheme = SchemeBuilder.AddToScheme
 )

config/crd/bases/demo.mashibing.com_apps.yaml

@@ -0,0 +1,50 @@
+---
+apiVersion: apiextensions.k8s.io/v1
+kind: CustomResourceDefinition
+metadata:
+  annotations:
+    controller-gen.kubebuilder.io/version: v0.9.2
+  creationTimestamp: null
+  name: apps.demo.mashibing.com
+spec:
+  group: demo.mashibing.com
+  names:
+    kind: App
+    listKind: AppList
+    plural: apps
+    singular: app
+  scope: Namespaced
+  versions:
+  - name: v1
+    schema:
+      openAPIV3Schema:
+        description: 定义我们CRD的对象 App is the Schema for the apps API
+        properties:
+          apiVersion:
+            description: 'APIVersion defines the versioned schema of this representation
+              of an object. Servers should convert recognized schemas to the latest
+              internal value, and may reject unrecognized values. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources'
+            type: string
+          kind:
+            description: 'Kind is a string value representing the REST resource this
+              object represents. Servers may infer this from the endpoint the client
+              submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds'
+            type: string
+          metadata:
+            type: object
+          spec:
+            description: AppSpec defines the desired state of App
+            properties:
+              foo:
+                description: Foo is an example field of App. Edit app_types.go to
+                  remove/update
+                type: string
+            type: object
+          status:
+            description: AppStatus defines the observed state of App
+            type: object
+        type: object
+    served: true
+    storage: true
+    subresources:
+      status: {}

config/rbac/role.yaml

@@ -0,0 +1,33 @@
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  creationTimestamp: null
+  name: manager-role
+rules:
+- apiGroups:
+  - demo.mashibing.com
+  resources:
+  - apps
+  verbs:
+  - create
+  - delete
+  - get
+  - list
+  - patch
+  - update
+  - watch
+- apiGroups:
+  - demo.mashibing.com
+  resources:
+  - apps/finalizers
+  verbs:
+  - update
+- apiGroups:
+  - demo.mashibing.com
+  resources:
+  - apps/status
+  verbs:
+  - get
+  - patch
+  - update

controllers/app_controller.go

@@ -27,6 +27,7 @@ import (
 	demov1 "mashibing.com/demo/app/api/v1"
 )
 
+// 是提供调和函数（把现阶段的状态，和我们定义的状态进行统一。趋近的调和函数），对象中的数据，可以是在上层统一管理
 // AppReconciler reconciles a App object
 type AppReconciler struct {
 	client.Client
@@ -37,6 +38,7 @@ type AppReconciler struct {
 //+kubebuilder:rbac:groups=demo.mashibing.com,resources=apps/status,verbs=get;update;patch
 //+kubebuilder:rbac:groups=demo.mashibing.com,resources=apps/finalizers,verbs=update
 
+// 我们核心功能函数，要去定义operator的行为
 // Reconcile is part of the main kubernetes reconciliation loop which aims to
 // move the current state of the cluster closer to the desired state.
 // TODO(user): Modify the Reconcile function to compare the state specified by
@@ -50,10 +52,12 @@ func (r *AppReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.R
 	_ = log.FromContext(ctx)
 
 	// TODO(user): your logic here
+	// 实现你的业务逻辑
 
 	return ctrl.Result{}, nil
 }
 
+// 将 controller 注册到 manager 中
 // SetupWithManager sets up the controller with the Manager.
 func (r *AppReconciler) SetupWithManager(mgr ctrl.Manager) error {
 	return ctrl.NewControllerManagedBy(mgr).

main.go

@@ -37,18 +37,22 @@ import (
 )
 
 var (
+	// 一个对象，用来管理gvk和gostruct（crd）映射，以及一些互相转换的方法。
 	scheme   = runtime.NewScheme()
 	setupLog = ctrl.Log.WithName("setup")
 )
 
 func init() {
+	// k8s 内置的 GVK 和 gostruct 的映射，也就是这个scheme需要的方法和映射，注入到scheme变量中
 	utilruntime.Must(clientgoscheme.AddToScheme(scheme))
 
+	// 本 operator 中的 GVK 和 gostruct 的映射，也就是这个scheme需要的方法和映射，注入到scheme变量中
 	utilruntime.Must(demov1.AddToScheme(scheme))
 	//+kubebuilder:scaffold:scheme
 }
 
 func main() {
+	// 处理命令行参数
 	var metricsAddr string
 	var enableLeaderElection bool
 	var probeAddr string
@@ -63,10 +67,13 @@ func main() {
 	opts.BindFlags(flag.CommandLine)
 	flag.Parse()
 
+	// 处理日志的参数
 	ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))
+	// 完成处理命令
 
+	// 创建 manager
 	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
-		Scheme:                 scheme,
+		Scheme:                 scheme, // 前面创建的 gvk 和 gostruct 映射的对象
 		MetricsBindAddress:     metricsAddr,
 		Port:                   9443,
 		HealthProbeBindAddress: probeAddr,
@@ -89,6 +96,7 @@ func main() {
 		os.Exit(1)
 	}
 
+	// 注册我们的 controller
 	if err = (&controllers.AppReconciler{
 		Client: mgr.GetClient(),
 		Scheme: mgr.GetScheme(),
@@ -98,6 +106,7 @@ func main() {
 	}
 	//+kubebuilder:scaffold:builder
 
+	// 添加探活的path
 	if err := mgr.AddHealthzCheck("healthz", healthz.Ping); err != nil {
 		setupLog.Error(err, "unable to set up health check")
 		os.Exit(1)
@@ -107,6 +116,7 @@ func main() {
 		os.Exit(1)
 	}
 
+	// 启动程序
 	setupLog.Info("starting manager")
 	if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
 		setupLog.Error(err, "problem running manager")