Kubernetes mount volume on existing directory with files inside the container

Question

I am using k8s with version 1.11 and CephFS as storage.

I am trying to mount the directory created on the CephFS in the pod. To achieve the same I have written the f

Answer 1

Unfortunately Kubernetes' volume system is very different from Docker's so this is not possible directly. If there is a single file (or a small number) you can use subPath projection like this:

volumeMounts:
- name: cephfs-0
  mountPath: /opt/myapplication/conf/foo.conf
  subPath: foo.conf

Repeat that for each file. But if you have a lot of files, or if they can vary, then you have to handle this at runtime or use templating tools. Usually that means mounting it somewhere else and setting up symlinks before your main process starts.