container: build Rocky Linux 9 containers

Signed-off-by: Peter Colberg <peter.colberg@intel.com>

.github/workflows/container.yml

@@ -39,6 +39,15 @@ jobs:
           - image: rockylinux-kernel-devel
             container: rockylinux-8-kernel-devel
             tag: '8.8'
+          - image: rockylinux-kernel-devel
+            container: rockylinux-8-kernel-devel
+            tag: '9'
+          - image: rockylinux-kernel-devel
+            container: rockylinux-8-kernel-devel
+            tag: '9.0'
+          - image: rockylinux-kernel-devel
+            container: rockylinux-8-kernel-devel
+            tag: '9.2'
           - image: ubuntu-kernel-devel
             container: ubuntu-22.04-kernel-devel
             tag: '20.04'

container/rockylinux-8-kernel-devel/Dockerfile

@@ -5,20 +5,20 @@ ARG tag=8
 FROM rockylinux/rockylinux:${tag}
 # https://docs.docker.com/engine/reference/builder/#understand-how-arg-and-from-interact
 ARG tag
-# The PowerTools repository is needed for dwarves, which is a
-# build dependency of the kernel makefile target rpm-pkg.
+# On Rocky 8, the PowerTools repository is needed for dwarves, which
+# is a build dependency of the kernel makefile target rpm-pkg.
 # The EPEL repository is needed for dkms.
 #
 # When ${tag} is explicitly given as a minor version, e.g., 8.6,
 # install packages from the vault repositories instead of the default
 # mirrors. Otherwise, packages will be upgraded or installed from the
 # latest minor release, e.g., 8.6 is upgraded to 8.9 or 8.10, which
 # we want to specifically avoid, to build against older kernels.
-RUN sed -i '/^enabled=/s#0#1#' /etc/yum.repos.d/Rocky-PowerTools.repo \
-    && grep '^enabled=1$' /etc/yum.repos.d/Rocky-PowerTools.repo \
+RUN ([[ "${tag}" != 8* ]] || sed -i '/^enabled=/s#0#1#' \
+        /etc/yum.repos.d/Rocky-PowerTools.repo) \
     && ([[ "${tag}" != *.* ]] || sed -i -e '/^mirrorlist/s,^,#,' \
         -e "s,^#\\?\\(baseurl=http://dl.rockylinux.org\\)/\$contentdir/\$releasever/,\\1/vault/rocky/${tag}/," \
-        /etc/yum.repos.d/Rocky-*.repo) \
+        /etc/yum.repos.d/[Rr]ocky*.repo) \
     && yum -y upgrade \
     && yum -y install epel-release \
     && yum -y install \