kubectl ValidationError(Deployment.spec) : missing required field "selector" in io. k8s.api.apps.v1.DeploymentSpec;

Question

当我尝试运行 kubectl apply -f 02-php-apache-deployment.yaml 我收到以下错误:

错误:验证“02-php-apache-deployment.yaml”时出错:验证数据时出错:ValidationError(Deployment.spec):io.k8s.api.apps.v1 中缺少必填字段“selector”。部署规范；如果您选择忽略这些错误，请使用 --validate=false

关闭验证

这是我的部署 yml 文件:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: php-apache
spec:
  replicas: 3
  template:
    metadata:
      labels:
        role: php-apache
    spec:
      containers:
      - name: php-apache
        image: k8s.gcr.io/hpa-example
        imagePullPolicy: IfNotPresent        
        ports:
        - containerPort: 80
        env:
        - name: MYSQL_ROOT_PASSWORD
          value: "password"
        resources:
          requests:
            memory: "64Mi"
            cpu: "200m"
          limits:
            memory: "128Mi"
            cpu: "500m"

我使用的是 minikube v1.6.2 版

和 kubectl 版本:

Client Version: version.Info{Major:"1", Minor:"14", GitVersion:"v1.14.8", GitCommit:"211047e9a1922595eaa3a1127ed365e9299a6c23", GitTreeState:"clean", BuildDate:"2019-10-15T12:11:03Z", GoVersion:"go1.12.10", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"17", GitVersion:"v1.17.0", GitCommit:"70132b0f130acc0bed193d9ba59dd186f0e634cf", GitTreeState:"clean", BuildDate:"2019-12-07T21:12:17Z", GoVersion:"go1.13.4", Compiler:"gc", Platform:"linux/amd64"}

Answer 1

好的，我发现我错过了其中的选择器 matchLabels 和应用程序。

我改变了这 block :

spec:
  replicas: 3
  selector:
    matchLabels:
      app: php-apache
  template:
    metadata:
      labels:
        app: php-apache

最终正确的 yml 文件:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: php-apache
spec:
  replicas: 3
  selector:
    matchLabels:
      app: php-apache
  template:
    metadata:
      labels:
        app: php-apache
    spec:
      containers:
      - name: php-apache
        image: k8s.gcr.io/hpa-example
        imagePullPolicy: IfNotPresent        
        ports:
        - containerPort: 80
        env:
        - name: MYSQL_ROOT_PASSWORD
          value: "password"
        resources:
          requests:
            memory: "64Mi"
            cpu: "200m"
          limits:
            memory: "128Mi"
            cpu: "500m"