Description of problem: A flex volume plugin can't opt-out of a recursive fsgroup change on the mount.. This can be problematic for shared file systems.
PR opened: https://github.com/openshift/origin/pull/21070 @Brad we will want this in origin master branch too right, for 4.0?
Tested that the capabilities.fsGroup is supported in flex volume driver call.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2018:2652