kubernetes的Deployment, DaemonSet, Job 和 CronJob事例

k8s kubernetes给node节点添加标签和删除node节点标签

Deployment配置文件exampledeploymentv1.yaml

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
           hostPort: 8080
           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

DaemonSet配置文件

apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: daemon-httpd
spec:
  selector:
    matchLabels:
      name: daemon-httpd
  template:
    metadata:
      labels:
        name: daemon-httpd
    spec:
      containers:
      - name: daemon-httpd
        image: httpd
        imagePullPolicy: IfNotPresent
        ports:
        - containerPort: 80
          hostPort: 8088
          protocol: TCP

Job配置文件

开启ttlSecondsAfterFinished，给job结束后设置自动删除时间
这个功能默认是没有开启的，需要手动修改/etc/kubernetes/manifests下面的三个yaml文件
kube-apiserver.yaml kube-controller-manager.yaml kube-scheduler.yaml
加入 - --feature-gates=TTLAfterFinished=true

activeDeadlineSeconds是指超时的时间

apiVersion: batch/v1
kind: Job
metadata:
  name: job-test
spec:
  ttlSecondsAfterFinished: 30
  completions: 11
  parallelism: 3
#  activeDeadlineSeconds: 30
  template:
    spec:
      restartPolicy: Never
      containers:
      - name: job-test
        image: busybox
        imagePullPolicy: IfNotPresent
        command: [ 'sh', '-c' ]
        args: [ 'echo "start jobs";sleep 30;echo "jobs done!"']

CronJob配置文件

apiVersion: batch/v1beta1
kind: CronJob
metadata:
  name: echo-cronjob
spec:
  schedule: "*/1 * * * *"
  jobTemplate:
    spec:
      template:
        spec:
          restartPolicy: Never
          containers:
          - name: echo-cronjob
            image: busybox
            imagePullPolicy: IfNotPresent
            command: [ 'sh', '-c' ]
            args: [ 'echo "start cronjob!";sleep 30;echo "end cronjob!"' ]

未完工，待续