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---
prelude: |
The Kolla ``22.0.0`` (Gazpacho) release continues to modernise the
container image portfolio and streamlines the supported service set.
Highlights include:
* Debian base images switch to ``trixie`` (current Debian stable) and adopt
the ``deb822`` repository format
* Rocky Linux 10 with OVN ``26.03`` replaces Rocky Linux 9 as the only
supported Red Hat-family base image.
* New container images were introduced:
* ``neutron-ovn-vpn-agent`` brings OVN-native VPN agent support,
* ``prometheus-valkey-exporter`` enables Valkey monitoring,
* ``prometheus-openstack-network-exporter`` collects metrics from both
OVN and OVS
* OCI-standard image labels are now embedded in every image to improve
traceability.
* Core infrastructure received significant version bumps:
* ``RabbitMQ`` advances to ``4.2``,
* ``ansible-core`` in ``kolla-toolbox`` and ``bifrost`` moves to ``2.20``
(with ``ansible-runner`` also added to the toolbox)
* full Prometheus stack is refreshed with server ``3.5.3`` and
Alertmanager ``0.27.0``.
* The container portfolio was substantially pruned:
* ``redis`` and ``redis-sentinel`` are replaced by Valkey,
* ``zun`` and ``kuryr`` are dropped (broken upstream release),
* ``influxdb`` and ``telegraf`` are retired,
* ``xtrabackup`` is removed (incompatible with current MariaDB),
* ``neutron-linuxbridge-agent`` is dropped following its removal from
Neutron,
* ``prometheus-ovn-exporter`` is retired (upstream archived).
* The ``mod_wsgi`` / ``apache2`` installation has been moved exclusively
into the ``httpd`` container, replacing the legacy
``letsencrypt-webserver`` image.
* ``kolla_set_configs`` gains a ``directories`` section, allowing operators
to declaratively create directories and configure their permissions as
part of container start-up configuration.
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