Current Series Release Notes

21.0.0.0rc1

Prelude

The Kolla 21.0.0 (Flamingo) release modernises the base operating systems and core infrastructure shipped by the containers. Highlights include:

• Rocky Linux 10 replaces Rocky Linux 9 as the only supported Rocky base image, removing the Delorean/CentOS Cloud SIG dependency and tightening RPM repository handling via repos.yaml (including a new versioned Erlang source for aarch64).

• Data-plane services received major upgrades: MariaDB now tracks the 11.4 LTS series with the upstream health check script and the legacy clustercheck image removed, ProxySQL moves to 3.x, Bifrost consumes Ansible 11, RabbitMQ advances to 4.1, and Gnocchi is updated to 4.7.0.

• Observability components were refreshed with Fluentd 6.x LTS, OpenSearch/OpenSearch Dashboards 3.x, broad Prometheus exporter and infrastructure bumps (etcd, helm, letsencrypt-lego), and the retirement of the collectd, telegraf, and prometheus-ovn-exporter images.

• The container portfolio was streamlined: support landed for the ironic-pxe-filter image and neutron-metadata-agent wrapper scripts, while dormant services such as ironic-inspector and Venus were dropped.