I am trying to get the mount point details of host from a kuberentes pod. It is a privileged container. Even if I mount the root file system , I am not able to check the mount details of a particular type say s3fsmay be because it belongs to a different namespace. What is the best way to share the mount point namespace.
If you really just want details of the host's mount points rather than access to them you can run your Pod with hostPID: true and then inspect the mounts of a process in the proc filesystem that you know is running in the host's mount namespace (for example PID 1) like so: cat /proc/1/mounts
I did some research and found that kubernetes provides an option called MountPropagation which helps to achieve my requirement.
I tested this feature in my local set up and it did give me the result I wanted.
Few links that I found useful:
https://medium.com/kokster/kubernetes-mount-propagation-5306c36a4a2d https://kubernetes.io/docs/concepts/storage/volumes/#mount-propagation