Automatic merge from submit-queue
Automatically Add Supplemental Groups from Volumes to Pods
This adds support for a "GID" annotation that one can add to their PVs. When this annotation is seen the kubelet automatically adds the given GID to the list of supplemental groups for the pod to which the PV is attached. This allows admins to create volumes and suggest a GID to use to access the volume. This is needed for volumes which do not support ownership management such as NFS.
@markturansky PTAL