Pin Ubuntu Focal base image tag

Co-Authored-By: Mark Goddard <[email protected]>
Co-Authored-By: Matt Anson <[email protected]>

Author: 3 people

etc/kayobe/kolla/kolla-build.conf

@@ -1,6 +1,11 @@
 [DEFAULT]
-{# Pinning to Rocky 9 minor version used in our repos #}
-{% if kolla_base_distro == 'rocky' %}
+{# Packages in the latest upstream Ubuntu base image can be ahead of our package repo #}
+{# snapshots, so pin to a specific tag. #}
+{# This tag should be updated when Ubuntu package repo snapshot versions are changed. #}
+{% if kolla_base_distro == 'ubuntu' %}
+base_tag = focal-20231003
+{# Similarly pinning to Rocky 9 minor version used in our repos #}
+{% elif kolla_base_distro == 'rocky' %}
 base_tag = 9.{{ stackhpc_pulp_repo_rocky_9_minor_version }}
 {% endif %}
 build_args = {{ kolla_build_args.items() | map('join', ':') | join(',') }}

releasenotes/notes/pin-focal-baseimage-baafa2583f952596.yaml

@@ -0,0 +1,8 @@
+---
+fixes:
+  - |
+    Pin the OCI image tag used for the Ubuntu Focal base-image
+    of Kolla image builds. This prevents packages in the image
+    with the latest tag getting in front of StackHPC release-train
+    package repositories. Ubuntu tag should be bumped when new
+    packages are available in StackHPC release-train.