部署无状态应用

部署

运行两个 nginx 容器。

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:1.14.2
        ports:
        - containerPort: 80

运行配置文件

kubectl apply -f https://k8s.io/examples/application/deployment.yaml

查看 deployment 信息

kubectl describe deployment nginx-deployment

查看 pods 列表

kubectl get pods -l app=nginx

查看 pod 信息

kubectl describe pod <pod-name>

升级

修改配置后重新 apply 一下配置文件即可更新，比如更新 image 版本，或者更新 replicas 的数量。

删除

kubectl delete deployment nginx-deployment