kubernetes/k8s中deployments yaml 示例

kubernetes/k8s中deployments yaml 示例

本文介绍kubernetes/k8s中deployments的生命周期管理,包含创建，更新，升级，回退，删除。 并给出示例

deployments的创建

下面我们将创建一个hello-server的deployment

创建文件deployment.yaml，内容如下

apiVersion: apps/v1
kind: Deployment
metadata:
  name: deploy-hello-server
spec:
  selector:
    matchLabels:
      app: deploy-hello-server
  template:
    metadata:
      labels:
        app: deploy-hello-server
    spec:
      containers:
      - image: wssiqi/hello-server:v1
        name: hello-server

应用deployment并查看状态

$ kubectl apply -f deployment.yaml
deployment.apps/deploy-hello-server created
$ kubectl get pods
NAME                                   READY   STATUS    RESTARTS   AGE
deploy-hello-server-79846bbbd6-z8p77   1/1     Running   0          4s

deployments的更新

下面我们尝试将deployment中replica的数量设置为2

更新deployment.yaml内容如下，添加replicas: 2

apiVersion: apps/v1
kind: Deployment
metadata:
  name: deploy-hello-server
spec:
  selector:
    matchLabels: