Change-Id: I957fcea4ab180dd82d1faaa9a012f83d3647f043

* HAProxy is now 1.8 in CentOS 8
* Support python3 in baremetal role
* Remove support for environments without python2 installed (this could
  not have worked since we gather facts before this point)

Workarounds:

* Using CentOS 7 yum repo for Docker, with module_hotfixes

Change-Id: I30bd3d58f6224ad4c9575ba66c74deabe6895cc4
Partially-Implements: blueprint centos-rhel-8

Due to regex matching of images, we are currently building quite a few
unnecessary images in CI. Images that can unexpectedly match:

* barbican-keystone-listener
* ironic-neutron-agent
* prometheus-haproxy-exporter
* prometheus-memcached-exporter

This change improves the situation by anchoring matches to the start of
the name. A full solution would be to specify every image required for
each job. This would be quite verbose and require maintenance.

Change-Id: I7387ccd0cb394c54c79bfba8b1c09fce7ee2973e

Since Zuul was restarted after applying [1], we can keep relevant
files listings in the base jobs per scenario without blocking
periodic job runs.
This greatly simplifies the jobs and project definitions.

[1] https://review.opendev.org/678273

Change-Id: If2e4fff6a514e6174709c2fc9f76b103f81a54ae

This change introduces prune-images command.

Uses docker_prune module of Ansible that comes with version 2.8.

Depends-On: https://review.opendev.org/#/c/699333/

Implements: blueprint docker-image-pruning

Change-Id: Icbf374dd50e1cc1f1604bb4fa779b34279efd50c

Change-Id: Ib9c13b69b46cdc3e28be127ccd86df9b59bd60e9

Change-Id: I2cf87b67c4dd46fd5003bf8a330abff83477f9f9

* Adding zuul centos-source/ubuntu-source ceph-ansible jobs
* Jobs will deploy all Ceph integrated OpenStack components, i.e.
  cinder, glance, nova
* Will utilize core openstack testing script

Depends-On: https://review.opendev.org/685032
Depends-On: https://review.opendev.org/698301

Implements: blueprint ceph-ansible
Change-Id: I233082b46785f74014177f579aeac887a25b2ae2

Change-Id: I2ddc8ce114ebc9754f53866cefbff50e63ed7c7d

Change-Id: I03ee4020cfb277fd3d6c5f5c70a3a6eeee2cac9e

Change-Id: Idcdf6e3a4c5a751c848eb240b1896605843f8154

Change-Id: Ie5111b898da980d63e9d90003f823172e7a78bc2

Introduce user modifiable variables instead of fixed-names
of Ceph keyring files for external Ceph functionality.

Change-Id: I1a33b3f9d6eca5babf53b91187461e43aef865ce

204 for very long url which is hard to break safely
306 for "echo | docker" as echo should not fall

Change-Id: I14df39d611d39ad1f6184ab92d628cb010881fbb

Change-Id: I70f692f125739b5119c71a554a37b5c21d4164f6

These affected both deploy (and reconfigure) and upgrade
resulting in WSREP issues, failed deploys or need to
recover the cluster.

This patch makes sure k-a does not abruptly terminate
nodes to break cluster.
This is achieved by cleaner separation between stages
(bootstrap, restart current, deploy new) and 3 phases
for restarts (to keep the quorum).

Upgrade actions, which operate on a healthy cluster,
went to its section.

Service restart was refactored.

We no longer rely on the master/slave distinction as
all nodes are masters in Galera.

Closes-bug: #1857908
Closes-bug: #1859145
Change-Id: I83600c69141714fc412df0976f49019a857655f5

To use an iSCSI Cinder backend as its store, glance_api must run
privileged and have /dev and /etc/iscsi properly mounted

Co-authored-by: Radosław Piliszek <radoslaw.piliszek@gmail.com>
Change-Id: I988d3c9d0564483440ae17203ad88a8049abbea4
Closes-Bug: #1855695

docker_image_facts has been deprecated.

[1] https://docs.ansible.com/ansible/2.8/modules/docker_image_facts_module.html

Depends-On: https://review.opendev.org/#/c/699333/
Change-Id: I4556e603ec501f9bdaab5f20cee754467129c4e9

Since [1] nova-compute uses rbd python library instead of libvirt to cleanup
volumes and get pool info - so it requires cinder keyring on filesystem.

In external ceph case it is often that nova key does not exist (is simply a copied
cinder key) and the rbd user is set to cinder - therefore the earlier mentioned
operations will fail due to a missing keyring on the filesystem.

[1]: https://review.opendev.org/#/c/668564/

Change-Id: Idef21dc5f7e9ff512bc8920630a3de61a1e69eee
Backport: train
Closes-Bug: #1859408

Change-Id: I1f8d80d2c655f15b8591aea95af81263581ebaaf