Remove support for distributions with Python 3.6

IPA can no longer be installed on them, other projects will follow.
Leave the jobs in place for projects that consume them.
Publish Stream 9 images (we'll need to clean up tarballs.o.o later).

Change-Id: I350c563c1c4ab60ac10d7c9e4bb0715bfde1b1db

doc/source/admin/dib.rst

@@ -4,12 +4,11 @@ diskimage-builder images
 Images built using diskimage-builder_ are recommended for production use on
 real hardware. The recommended distributions are:
 
-* CentOS Stream 8
+* CentOS Stream 9
 * Debian Bullseye (``debian-minimal`` element)
 
 The following should work but receive only limited testing and support:
 
-* CentOS 7 (using Python 3.6)
 * openSUSE Leap 15.1
 * Ubuntu 20.04 Focal
 
@@ -29,13 +28,13 @@ You can add other diskimage-builder_ elements via the ``-e`` flag:
 
 .. code-block:: shell
 
-    ironic-python-agent-builder -e <extra-element> --release 8-stream centos
+    ironic-python-agent-builder -e <extra-element> --release 9-stream centos
 
 You can specify the base name of the target images:
 
 .. code-block:: shell
 
-    ironic-python-agent-builder -o my-ipa --release 8-stream centos
+    ironic-python-agent-builder -o my-ipa --release 9-stream centos
 
 You can specify the arch of the target image by setting ``ARCH`` environment
 variable (default is amd64):
@@ -43,7 +42,7 @@ variable (default is amd64):
 .. code-block:: shell
 
     export ARCH=aarch64
-    ironic-python-agent-builder -o my-ipa --release 8-stream centos
+    ironic-python-agent-builder -o my-ipa --release 9-stream centos
 
 ... with diskimage-builder
 ~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -74,7 +73,7 @@ for example:
 
 .. code-block:: shell
 
-    export DIB_RELEASE=8-stream
+    export DIB_RELEASE=9-stream
     disk-image-create -o ironic-python-agent \
         ironic-python-agent-ramdisk centos
 
@@ -169,7 +168,7 @@ required for instance image or deploy image.
 
 .. code-block:: bash
 
-    ironic-python-agent-builder -e stable-interface-names --release 8-stream centos
+    ironic-python-agent-builder -e stable-interface-names --release 9-stream centos
 
 
 .. _diskimage-builder: https://docs.openstack.org/diskimage-builder

releasenotes/notes/centos9-0f925822a2ab9e0a.yaml

@@ -0,0 +1,5 @@
+---
+upgrade:
+  - |
+    CentOS 7 and 8 are no longer supported since OpenStack dropped support
+    for Python 3.6. Please use CentOS 9 (Stream) instead.

zuul.d/ironic-python-agent-builder-jobs.yaml

@@ -19,6 +19,7 @@
     vars:
       image_type: 'tinyipa'
 
+# TODO(dtantsur): remove when no other projects use it
 - job:
     name: ironic-python-agent-build-image-dib-centos8
     parent: ironic-python-agent-build-image-base
@@ -30,6 +31,17 @@
       image_release: '8-stream'
       image_target_name: 'centos8'
 
+- job:
+    name: ironic-python-agent-build-image-dib-centos9
+    parent: ironic-python-agent-build-image-base
+    required-projects:
+      - openstack/diskimage-builder
+    vars:
+      image_type: 'dib'
+      image_distro: 'centos'
+      image_release: '9-stream'
+      image_target_name: 'centos9'
+
 - job:
     name: ironic-python-agent-build-image-dib-debian
     parent: ironic-python-agent-build-image-base
@@ -68,15 +80,7 @@
     vars:
       image_type: 'tinyipa'
 
-- job:
-    name: ironic-python-agent-check-image-dib-centos7-python3
-    parent: ironic-python-agent-check-image-base
-    required-projects:
-      - openstack/diskimage-builder
-    vars:
-      image_type: 'dib'
-      image_distro: 'centos7'
-
+# TODO(dtantsur): remove when no other projects use it
 - job:
     name: ironic-python-agent-check-image-dib-centos8
     parent: ironic-python-agent-check-image-base
@@ -88,12 +92,6 @@
       image_release: '8-stream'
       image_target_name: 'centos8'
 
-- job:
-    name: ironic-python-agent-check-image-dib-centos8-extra
-    parent: ironic-python-agent-check-image-dib-centos8
-    vars:
-      extra_elements: ["extra-hardware"]
-
 - job:
     name: ironic-python-agent-check-image-dib-centos9
     parent: ironic-python-agent-check-image-base

zuul.d/project.yaml

@@ -11,9 +11,6 @@
         - ironic-python-agent-check-image-tinyipa
         - ironic-python-agent-check-image-dib-centos9
         - ironic-python-agent-check-image-dib-centos9-extra
-        - ironic-python-agent-check-image-dib-centos8
-        - ironic-python-agent-check-image-dib-centos8-extra
-        - ironic-python-agent-check-image-dib-centos7-python3
         - ironic-python-agent-check-image-dib-debian
         - ironic-python-agent-check-image-dib-debian-arm64
         - ironic-python-agent-check-image-dib-debian-extra
@@ -36,9 +33,6 @@
         - ironic-python-agent-check-image-tinyipa
         - ironic-python-agent-check-image-dib-centos9
         - ironic-python-agent-check-image-dib-centos9-extra
-        - ironic-python-agent-check-image-dib-centos8
-        - ironic-python-agent-check-image-dib-centos8-extra
-        - ironic-python-agent-check-image-dib-centos7-python3
         - ironic-python-agent-check-image-dib-debian
         - ironic-python-agent-check-image-dib-debian-arm64
         - ironic-python-agent-check-image-dib-debian-extra
@@ -47,7 +41,7 @@
         - publish-openstack-python-branch-tarball
         - ironic-python-agent-build-image-tinyipa:
             branches: master
-        - ironic-python-agent-build-image-dib-centos8:
+        - ironic-python-agent-build-image-dib-centos9:
             branches: master
         - ironic-python-agent-build-image-dib-debian:
             branches: master