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-2017:3230
As far as I remember, these two comments are about the same thing. We need to configure selinux to allow ceilometer, otherwise it can't write to NFS. I guess it was a simple >sudo setenforce 0