k8s init container

initcontainer在应用容器启动之前启动。在initcontainer启动之前创建一个文件，放到卷中。k8s yaml commond命令格式：

- 命令

- "args1"

- "args2"

- ...

apiVersion: v1
kind: Pod
metadata:
  name: init-demo
spec:
  containers:
  - name: nginx-demo
    image: nginx:latest
    ports:
    - containerPort: 8080
    volumeMounts:
    - name: workdir
      mountPath: /usr/share/nginx/html
  initContainers:
  - name: install
    command:
    - touch
    - "/work-dir/test.txt"
    image: ubuntu:latest
    volumeMounts:
    - name: workdir
      mountPath: "/work-dir"
  volumes:
  - name: workdir
    emptyDir: {}

进入容器可以看到创建的test.txt文件

cd /usr/share/nginx/html