k8s——一个简单示例

apiVersion #API对象版本，可通过`kubectl api-versions`命令查看

kind #资源类型，区分大小写，可通过`kubectl api-resources`命令查看，这里使用Deployment对象

metadata #是该资源的元数据,name是必需的元数据项

spec# 部分是该Deployment的规格说明

    replicas#指明副本数量,默认为1

    template#定义Pod的模板,这是配置文件的重要部分

        metadata#定义Pod的元数据,至少要定义一个label。label的key和value可以任意指定

        spec # 描述Pod的规格,此部分定义Pod中每一个容器的属性,name和image是必需的

status

kubectl create deployment nginx-deployment --image=nginx --replicas=2 --port=80

# nginx-deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  selector:
    matchLabels:
      app: nginx
  replicas: 2 # tells deployment to run 2 pods matching the template
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
        - name: nginx
          image: nginx:latest
          ports:
            - containerPort: 80

kubectl expose deployment nginx-deployment --type=NodePort --port=80

# nginx-service.yaml
apiVersion: v1
kind: Service
metadata:
  name: nginx-service
  labels:
    name: nginx-service
spec:
  type: NodePort
  ports:
    - port: 80
  selector:
    app: nginx # 名称与deployment中定义的app名称保持一致

NAME               TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)        AGE
kubernetes         ClusterIP   10.96.0.1       <none>        443/TCP        157m
nginx-deployment   NodePort    10.106.195.35   <none>        80:32352/TCP   6m51s

kubectl delete -n default deployment nginx-deployment
kubectl delete -n default service nginx-service
kubectl delete -n default ingress test-ingress