Gnocchi bootstrap fails when using ceph backend

[Pierre Riteau]

Deployment of Gnocchi fails during `TASK [gnocchi : Running gnocchi bootstrap container]`.
`docker logs bootstrap_gnocchi` shows:

2020-07-07 20:31:35,038 [21] INFO gnocchi.common.ceph: Ceph storage backend use 'cradox' python library
2020-07-07 20:31:35,087 [21] ERROR gnocchi.utils: Unable to initialize storage driver
Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/tenacity/__init__.py", line 361, in call
    result = fn(*args, **kwargs)
  File "/usr/lib/python3.6/site-packages/gnocchi/storage/__init__.py", line 102, in get_driver
    conf.storage)
  File "/usr/lib/python3.6/site-packages/gnocchi/storage/ceph.py", line 52, in __init__
    self.rados, self.ioctx = ceph.create_rados_connection(conf)
  File "/usr/lib/python3.6/site-packages/gnocchi/common/ceph.py", line 69, in create_rados_connection
    conn.connect()
  File "cradox.pyx", line 876, in cradox.Rados.connect
cradox.OSError: [errno 95] error connecting to the cluster

This is caused by a wrong value for [storage]/ceph_keyring in gnocchi.conf: it should be the full path to the keyring file, instead of only the name of the file.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/739843

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/ussuri
Review: https://review.opendev.org/739917

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/739843
Committed: https://git.openstack.org/cgit/openstack/kolla-ansible/commit/?id=9a0f8c319358b9b4a78bc38d8391dc61104ad49d
Submitter: Zuul
Branch: master

commit 9a0f8c319358b9b4a78bc38d8391dc61104ad49d
Author: Pierre Riteau <email address hidden>
Date: Tue Jul 7 21:47:04 2020 +0200

    Fix incorrect value of [storage]/ceph_keyring in gnocchi.conf

    The value should be the full path to the keyring file, not just the
    name. Without this fix Gnocchi fails to connect to Ceph.

    Change-Id: Iaa69b2096b09a448345de50911e21436875d48d6
    Closes-Bug: #1886711

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/739917
Committed: https://git.openstack.org/cgit/openstack/kolla-ansible/commit/?id=1636ea073956979ce62890edcc94b05522e4bebe
Submitter: Zuul
Branch: stable/ussuri

commit 1636ea073956979ce62890edcc94b05522e4bebe
Author: Pierre Riteau <email address hidden>
Date: Tue Jul 7 21:47:04 2020 +0200

    Fix incorrect value of [storage]/ceph_keyring in gnocchi.conf

    The value should be the full path to the keyring file, not just the
    name. Without this fix Gnocchi fails to connect to Ceph.

    Change-Id: Iaa69b2096b09a448345de50911e21436875d48d6
    Closes-Bug: #1886711
    (cherry picked from commit 9a0f8c319358b9b4a78bc38d8391dc61104ad49d)