Fix pod name discovery using label selector instead of construction

Pod names vary based on Galera cluster names and cannot be reliably
constructed from backup names alone. Use label selector to discover
pods dynamically.

Problem:
- Cell1 pod: openstack-cell1-restore-openstack-cell1restore
- Main pod: openstack-restore-openstackrestore
- Pattern: <galera-cluster>-restore-<galerarestore-cr>
- Galera cluster name comes from GaleraBackup spec, not backup name

Solution:
- Use label selector: -l cr=<galerarestore-cr-name>
- Galera operator labels pods with cr=<galerarestore-name>
- Discover pod dynamically instead of constructing name
- Works for all Galera cluster naming conventions

Changes:
- Wait task: Discover pod using label selector
- Automated restore: Discover pod using label selector  
- Helper script: Discover pod using label selector
- Remove hardcoded pod name construction

Example:
  GaleraRestore CR: openstack-cell1restore
  Label selector: -l cr=openstack-cell1restore
  Discovered pod: openstack-cell1-restore-openstack-cell1restore

This fixes pod discovery for all Galera cluster configurations.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: stuggi

docs/dev/playbooks/restore-openstack-ctlplane.yaml

@@ -1035,20 +1035,28 @@
     - name: Wait for GaleraRestore pods to be ready
       ansible.builtin.shell: |
         RESTORE_NAME="{{ item }}restore"
-        POD_NAME="openstack-restore-${RESTORE_NAME}"
 
-        echo "Waiting for pod: ${POD_NAME}"
+        echo "Waiting for GaleraRestore pod: ${RESTORE_NAME}"
 
-        # Wait for pod to exist
+        # Wait for pod to exist (find by label selector)
         for i in {1..60}; do
-          if oc get pod "${POD_NAME}" -n {{ openstack_namespace }} &>/dev/null; then
-            echo "Pod found"
+          POD_NAME=$(oc get pod -n {{ openstack_namespace }} \
+            -l cr=${RESTORE_NAME} \
+            -o jsonpath='{.items[0].metadata.name}' 2>/dev/null || echo "")
+
+          if [ -n "${POD_NAME}" ]; then
+            echo "Pod found: ${POD_NAME}"
             break
           fi
           echo "Waiting for pod to be created... ($i/60)"
           sleep 5
         done
 
+        if [ -z "${POD_NAME}" ]; then
+          echo "ERROR: Pod for GaleraRestore ${RESTORE_NAME} not found after 5 minutes"
+          exit 1
+        fi
+
         # Wait for pod to be running
         oc wait --for=condition=Ready pod/"${POD_NAME}" -n {{ openstack_namespace }} --timeout=300s
 
@@ -1120,18 +1128,23 @@
         set -e
         BACKUP_NAME="{{ item }}"
         RESTORE_NAME="${BACKUP_NAME}restore"
-        POD_NAME="openstack-restore-${RESTORE_NAME}"
 
         echo "Processing restore for backup: ${BACKUP_NAME}"
         echo "Restore CR: ${RESTORE_NAME}"
-        echo "Pod name: ${POD_NAME}"
 
-        # Verify pod exists and is running
-        if ! oc get pod "${POD_NAME}" -n {{ openstack_namespace }} &>/dev/null; then
-          echo "ERROR: Restore pod not found: ${POD_NAME}"
+        # Discover pod name using label selector
+        POD_NAME=$(oc get pod -n {{ openstack_namespace }} \
+          -l cr=${RESTORE_NAME} \
+          -o jsonpath='{.items[0].metadata.name}' 2>/dev/null || echo "")
+
+        if [ -z "${POD_NAME}" ]; then
+          echo "ERROR: Restore pod not found for GaleraRestore: ${RESTORE_NAME}"
           exit 1
         fi
 
+        echo "Found pod: ${POD_NAME}"
+
+        # Verify pod is running
         POD_PHASE=$(oc get pod "${POD_NAME}" -n {{ openstack_namespace }} -o jsonpath='{.status.phase}')
         if [ "$POD_PHASE" != "Running" ]; then
           echo "ERROR: Restore pod is not running (phase: ${POD_PHASE})"

docs/dev/scripts/restore-galera-latest.sh

@@ -66,18 +66,20 @@ if [ -z "$RESTORE_NAME" ]; then
     exit 1
 fi
 
-POD_NAME="openstack-restore-${RESTORE_NAME}"
-
 print_header "Restore Galera Database from Latest Backup"
-echo "Restore Name: $RESTORE_NAME"
-echo "Pod Name: $POD_NAME"
+echo "GaleraRestore CR: $RESTORE_NAME"
 echo "Namespace: $OPENSTACK_NAMESPACE"
 
-# Check if pod exists
-print_info "Checking if restore pod exists..."
-if ! oc get pod "$POD_NAME" -n "$OPENSTACK_NAMESPACE" &>/dev/null; then
-    print_error "Restore pod not found: $POD_NAME"
+# Discover pod name using label selector
+print_info "Discovering restore pod using label selector..."
+POD_NAME=$(oc get pod -n "$OPENSTACK_NAMESPACE" \
+  -l cr="${RESTORE_NAME}" \
+  -o jsonpath='{.items[0].metadata.name}' 2>/dev/null || echo "")
+
+if [ -z "$POD_NAME" ]; then
+    print_error "Restore pod not found for GaleraRestore: $RESTORE_NAME"
     print_info "Make sure the GaleraRestore CR has been created and the pod is running"
+    print_info "Expected label: cr=${RESTORE_NAME}"
     exit 1
 fi