初始化容器的概念 比如一个容器A依赖其他容器,可以为A设置多个 依赖容易A1,A2,A3
A1,A2,A3要按照顺序启动,A1没有启动启动起来的 话,A2,A3是不会启动的,直到所有的静态容器全 部启动完毕,主容器A才会启动。
一般用于A容器运行之前,先做一些准备工作。
如果初始化容器失败,则会一直重启,pod不会创建
yaml1
apiVersion: v1
kind: Pod
metadata:
name: init-pod
labels:
app: init-pod
spec:
containers:
- name: init-pod
image: busybox
command: ['sh', '-c', 'echo The app is running! && sleep 3600']
volumeMounts:
- mountPath: /xx
name: workdir
initContainers:
- name: init-mkdir
image: busybox
command: ['sh', '-c', "touch /work-dir/1112233"]
volumeMounts:
- mountPath: /work-dir
name: workdir
volumes:
- name: workdir
emptyDir: {}
容器成功启动
yaml2
apiVersion: v1
kind: Pod
metadata:
name: init-pod
labels:
app: init-pod
spec:
containers:
- name: init-pod
image: busybox
command: ['sh', '-c', 'echo The app is running! && sleep 3600']
volumeMounts:
- mountPath: /xx
name: workdir
initContainers:
- name: init-mkdir
image: busybox
command: ['sh', '-c', "touch /work-dir/1112233 && sleep 3600"]
volumeMounts:
- mountPath: /work-dir
name: workdir
volumes:
- name: workdir
emptyDir: {}
在初始化容器里面加了sleep后,容器无法正常启动,一直是初始化状态