Pin R9 base image tag

Co-Authored-By: Mark Goddard <mark@stackhpc.com>
Co-Authored-By: Matt Anson <matta@stackhpc.com>

Author: 3 people

etc/kayobe/kolla/kolla-build.conf

@@ -1,2 +1,6 @@
 [DEFAULT]
+{# Pinning to Rocky 9 minor version used in our repos #}
+{% if 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-rocky9-baseimage-3d224df5b6f56b10.yaml

@@ -0,0 +1,6 @@
+fixes:
+  - |
+    Pin the OCI image tag used for the base-image of Rocky 9
+    Kolla image builds. This prevents packages in the image with
+    the latest tag getting in front of StackHPC release-train
+    package repositories.