How to initialize systemd services in kubernetes pod?

I have an image from base os centos/systemd.when i give "exec /usr/sbin/init" in the laucher file of the container and creating the container using docker systemd services are up. But when i create a container using the same image in kubernetes with the same launcher file systemd services are not comming up.How to run the /usr/sbin/init in the kubernetes so the systemd services comes up during the container creation

Solution

To solve this issue you can use kubernetes init container which run first before the main container creation and start the necessary services.

apiVersion: v1
kind: Pod
metadata:
  name: myapp-pod
  labels:
    app: myapp
spec:
  initContainers:
  - name: check-system-ready
    image: busybox
    command: ['sh', '-c', 'Your sysntax for systemd']
  containers:
  - your container spec

Sharing here official kubernetes init container doc : https://kubernetes.io/docs/concepts/workloads/pods/init-containers/

https://kubernetes.io/docs/tasks/configure-pod-container/configure-pod-initialization/