Automatic openstack release for kolla sources

The NOTE(upgrade) tag has been added to more places to make it easier
to update the config for new releases

Author: Alex-Welsh

.github/workflows/stackhpc-promote.yml

@@ -3,7 +3,7 @@ name: Promote package repositories
 on:
   push:
     branches:
-      # NOTE(mgoddard): Reference only the current release branch here.
+      # NOTE(upgrade): Reference only the current release branch here.
       - stackhpc/zed
 jobs:
   promote:

etc/kayobe/kolla.yml

@@ -111,12 +111,9 @@ kolla_tag: "{{ openstack_release }}-{{ kolla_base_distro }}-{{ kolla_base_distro
 #     type: git
 #     location: https://github.com/openstack/ironic
 #     reference: master
-# NOTE (Alex-Welsh): The reference for many of these entries could be
-# 'stackhpc/{{ openstack_release }}' which would keep the branch up to date
-# for the current release. This is nice in theory but in practice, the stackhpc
-# forks change with every release and the elements in this list change with
-# them. Explicitly using /zed makes it more intuitive to find and edit these
-# entries.
+# NOTE(upgrade): These sources should be checked with each release. StackHPC
+# branches are only required when we have custom backports. For a new release,
+# we may have caught up with upstream.
 kolla_sources:
   bifrost-base-additions-stackhpc-inspector-plugins:
     # Install our custom inspector plugins.
@@ -126,11 +123,11 @@ kolla_sources:
   cloudkitty-base:
     type: git
     location: https://github.com/stackhpc/cloudkitty.git
-    reference: stackhpc/zed
+    reference: stackhpc/{{ openstack_release }}
   horizon-plugin-cloudkitty-dashboard:
     type: git
     location: https://github.com/stackhpc/cloudkitty-dashboard.git
-    reference: stackhpc/zed
+    reference: stackhpc/{{ openstack_release }}
   ironic-inspector-additions-stackhpc-inspector-plugins:
     # Install our custom inspector plugins.
     type: git
@@ -139,15 +136,15 @@ kolla_sources:
   magnum-base:
     type: git
     location: https://github.com/stackhpc/magnum.git
-    reference: stackhpc/zed
+    reference: stackhpc/{{ openstack_release }}
   neutron-base:
     type: git
     location: https://github.com/stackhpc/neutron.git
     reference: stackhpc/{{ openstack_release }}
   neutron-base-plugin-networking-generic-switch:
     type: git
     location: https://github.com/stackhpc/networking-generic-switch.git
-    reference: stackhpc/zed
+    reference: stackhpc/{{ openstack_release }}
 
 ###############################################################################
 # Kolla image build configuration.