It is not necessary to enable the nova cephfs backend to make use
of cinder cephfs volumes.

Change-Id: I35c3d2e49769962e5c47f585d91d1efd492a53d6
Closes-Bug: #1778107

Many of the templates use 600, remove unnecessary permission
on these templates to bring them in line with the others.

Change-Id: I30fe1b3822b9c7bb6ab98729fc519dc1d603db27

Introduced nova backend selection flag for Ceph and priority if
multiple backends are configured

Add mechanism to deploy arbitrary ceph.conf and keyring files into
nova-compute and nova-libvirt containers

Added documentation

Change-Id: Id010ca9cc2d914e5358ef79edeb600a28220dd4b
Implements: blueprint external-ceph

CentOS has a virtualization sig and storage sig which produces
udpated ceph and qemu images.  These images are then reused within
the rest of Red Hat packaging.  Install these repositories for
CentOS and make use of them.

This should work for OracleLinux as well.
Still testing centos.

Co-Authored-By: Vikram Hosakote <vhosakot@cisco.com>
Co-Authored-By: Paul Bourke <paul.bourke@oracle.com>

Change-Id: Iea21fc4f33bbfdb973cf354d492c372bd3360acb
Closes-Bug: #1566588

This brings Kolla images inline with FHS and should make finding
locations of things more consistent and reliable with the linux world
at large.

Change-Id: Iece5b4da4bace0fb8b1f41a65ab2c852ec73e6f8
Closes-Bug: #1485742

Recent regressions in the code base removed permission setting of
/dev/kvm to root:kvm 660 permissions which are default for CentOS's
version of libvirt.

Also Libvirt must be able to read its cnofiguration file, which was
previously 600 root:root.  Now its 644 root:root so its always readable.
This is fine, since this file doesn't contain any secret information.

Change-Id: Id87cf5da8e37bc5bb613ce919d0293803d0fe5ed
Closes-Bug: #1500733

The previous patch (I92f2eac895283791b2eea6a4351a43e90fdbb5a3) didn't
fix it because of the ceph patch that merged.

Change-Id: I82207f5cc684f7c180e301cac69fcc98fca63268
Partially-Implements: blueprint replace-config-external

Change-Id: I902e771a6e377f9ce3e452c123b2bbf65e3a2d7f
Implements: blueprint ceph-container

This implements all the openstack pieces needed to make ceph work.

DocImpact
Change-Id: I1d24476a966602cf955e5ef872b0efb01319894a
Partially-Implements: blueprint ceph-container
Implements: blueprint kolla-live-migration

Change-Id: I38c545484a7b1f3906d844eb3a7486e11c4b276a
Partially-Implements: blueprint replace-config-external