k8s deployment

案例01

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  selector:
    matchLabels:
      app: nginx
  replicas: 3
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxUnavailable: 1
  template:
    metadata:
      labels:
       app: nginx
       track: stable
    spec:
      restartPolicy: Always
      nodeSelector:
        mem: large
      volumes:
      - name: nginx-logs
        emptyDir: {}
      containers:
       - name: nginx
         image: nginx:1.7.9
         imagePullPolicy: Always
         ports:
         - containerPort: 80
           protocol: TCP
         volumeMounts:
         - name: nginx-logs
           mountPath: /var/log/nginx/
         livenessProbe:
           httpGet:
             port: 80
             path: /check_healty
             host: ping.zhufunin.com
             scheme: HTTP
             httpHeaders:
             - name: user-agent
               value: 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.36'

创建Deployment控制器

kubectl apply -f exampledeploymentv1.yaml --record

这里一定要加--record, 每次修改Deployment控制器时所使用的命令都会记录到备注字段，

以便在查看Deployment控制器变更历史或者回滚时可以辨别每次修改的内容

案例02

[root@master01]# kubectl apply -f deployment-web.yaml --record
deployment.apps/mywebdeployment created
[root@master01]# cat deployment-web.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: mywebdeployment
spec:
  selector:
    matchLabels:
      apps: web
  replicas: 4
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxUnavailable: 1
  template:
    metadata:
     labels:
       apps: web
    spec:
      containers:
      - name: web
        image: python:3.7
        command: ['sh', '-c']
        args: ['echo "<p>The host is $(hostname) </p>" > index.html;python -m http.server 80']
        ports:
        - name: mywebports
          containerPort: 80
[root@master01]#