Lock kernel minor version during image build

Author: hgreebe

cli/src/pcluster/resources/imagebuilder/update_and_reboot.yaml

@@ -57,6 +57,21 @@ phases:
               fi
 
               echo ${!OS}
+      - name: OperatingSystemVersion
+        action: ExecuteBash
+        inputs:
+          commands:
+            - |
+              set -v
+              FILE=/etc/os-release
+              if [ -e ${!FILE} ]; then
+                . ${!FILE}
+                echo "${!VERSION_ID}"
+              else
+                echo "The file '${!FILE}' does not exist. Failing build."
+                exit {{ FailExitCode }}
+              fi
+
 
       # Get platform name
       - name: PlatformName
@@ -151,6 +166,11 @@ phases:
               set -v
               OS='{{ build.OperatingSystemName.outputs.stdout }}'
               PLATFORM='{{ build.PlatformName.outputs.stdout }}'
+              VERSION='{{ build.OperatingSystemVersion.outputs.stdout }}'
+              if [[ ${!OS} == rhel9 ]]; then
+                  echo ${!VERSION} > /etc/yum/vars/releasever
+                  yum clean all
+                fi
 
               if [[ ${!PLATFORM} == RHEL ]]; then
                 yum -y install jq