shiftstack/prune: relax images cleanup (openshift#60956)

With Hypershift e2e jobs, the RHCOS image will be pushed into Glance for
HostedCluster. The link of the qcow2 is taken from the release payload.
In order to save network transfers, we will keep the RHCOS image longer
than 7h so it can be re-used by other jobs which need it until there is
a new image that is published.

For now, we'll cleanup the images every 2 weeks (only where the job
runs, so on VEXXHOST) to see how that works but this could be adjusted in the future.

Author: EmilienM

ci-operator/config/shiftstack/ci/shiftstack-ci-main.yaml

@@ -28,6 +28,7 @@ tests:
   steps:
     env:
       CLUSTER_TYPE_OVERRIDE: openstack-vexxhost
+      IMAGES_TTL: 336h
       OPENSTACK_AUTHENTICATION_METHOD: password
     workflow: shiftstack-cleanup
 - as: cleanup-openstack-nfv

ci-operator/step-registry/shiftstack/cleanup/shiftstack-cleanup-commands.sh

@@ -7,4 +7,16 @@ export OS_CLIENT_CONFIG_FILE="${SHARED_DIR}/clouds.yaml"
 export CLUSTER_TYPE="${CLUSTER_TYPE_OVERRIDE:-${CLUSTER_TYPE:-}}"
 SLACK_HOOK="$(</var/run/slack-hooks/shiftstack-bot)"
 
-prune --resource-ttl="$RESOURCE_TTL" --slack-hook="$SLACK_HOOK" --no-dry-run > "${ARTIFACT_DIR}/result.json"
+EXCLUDE_ARG=""
+if [ -n "${IMAGES_TTL:-}" ]; then
+    EXCLUDE_ARG="--exclude=images"
+    prune --resource-ttl="$IMAGES_TTL" --slack-hook="$SLACK_HOOK" --no-dry-run --include="images" > "/tmp/images-result.json"
+fi
+
+prune --resource-ttl="$RESOURCE_TTL" --slack-hook="$SLACK_HOOK" --no-dry-run "$EXCLUDE_ARG" > "/tmp/all-result.json"
+
+if [ -n "${IMAGES_TTL:-}" ]; then
+    jq -s '.[0] + .[1]' "/tmp/images-result.json" "/tmp/all-result.json" > "/tmp/result.json"
+else
+    cp "/tmp/all-result.json" "/tmp/result.json"
+fi

ci-operator/step-registry/shiftstack/cleanup/shiftstack-cleanup-ref.yaml

@@ -19,5 +19,10 @@ ref:
       If set, overrides CLUSTER_TYPE in this step.
   - name: RESOURCE_TTL
     default: 7h
+  - name: IMAGES_TTL
+    default: ''
+    documentation: |-
+      If set, prune the images with a different TTL than RESOURCE_TTL
+      and exclude images from the other prune command.
   documentation: |-
     Prune resources on the CI clouds.