How can I mount files in the same sub path in k8s deployment?

The cause of the issue is that during pod initialization there is an attempt to create directory website-content in the /app/html location which will cause error as the /app/html is mounted read only.

You cannot create a folder in the read only system that means you can't mount a volume as the folder doesn't exist, but if there was already the folder created, you can mount the volume.

So all you need is just to create a directory website-content in the foo/html/html location on the volume before you attach it into container. Then, as it will be mounted to the /app/html location, there will be directory /app/html/website-content.

For example, you can use a init container for that. Add this code to your deployment file:

initContainers:  - name: init-container    image: busybox    volumeMounts:    - name: website-storage      mountPath: /my-storage      readOnly: false    command: ['sh', '-c', 'mkdir -p /my-storage/foo/html/html/website-content']

When the pod is running, you check mount points on the pod using kubectl describe pod {pod-name}:

Mounts:/app/html from website-storage (ro,path="foo/html/html")/app/html/website-content from website-storage (ro,path="foo/website-content")/app/upload from website-storage (rw,path="foo/upload")

in my view app/html is already mounted and is read-only, better use different path,

2nd do you need to share volume with more pods ?

You cannot mount a volume into another volume. Instead you could mount it into a different location and create a symlink to that location during container startup.