[CI] Add mariadb backup into mariadb scenario

We are not testing mariadb backup, let's test
it in mariadb scenario.

Change-Id: I81d6ee944b3ed0e75129772bb993ce7a6147c3e8

tests/templates/globals-default.j2

@@ -133,6 +133,7 @@ enable_fluentd: "yes"
 enable_mariadb: "yes"
 enable_memcached: "no"
 enable_rabbitmq: "no"
+enable_mariabackup: "yes"
 {% endif %}
 
 {% if scenario == "cephadm" %}

tests/test-mariadb.sh

@@ -30,9 +30,57 @@ function test_recovery {
     mariadb_recovery
 }
 
+function test_backup {
+    echo "Performing full backup"
+    kolla-ansible -i ${RAW_INVENTORY} -vvv mariadb_backup --full
+    # Sleep for 30 seconds, not because it's absolutely necessary.
+    # The full backup is already completed at this point, as the
+    # ansible job is waiting for the completion of the backup script
+    # in the container on the controller side. It’s more of an
+    # attempt at a "sort of" simulation of the usual elapsed time
+    # since the last full backup for the incremental job, as some
+    # data gets written within those 30 seconds.
+    echo "Sleeping for 30 seconds"
+    sleep 30
+    kolla-ansible -i ${RAW_INVENTORY} -vvv mariadb_backup --incremental
+}
+
+function test_backup_with_retries {
+    # Retry test_backup up to 3 times if it fails
+    local max_retries=3
+    local attempt=1
+
+    while [[ $attempt -le $max_retries ]]; do
+        echo "Attempt $attempt of $max_retries for test_backup"
+
+        set +o errexit  # Temporarily disable errexit for retry logic
+        test_backup
+        result=$?
+        set -o errexit  # Re-enable errexit after the attempt
+
+        if [[ $result -eq 0 ]]; then
+            echo "test_backup succeeded on attempt $attempt"
+            return 0  # Exit the function if test_backup succeeds
+        else
+            echo "test_backup failed on attempt $attempt"
+        fi
+
+        if [[ $attempt -lt $max_retries ]]; then
+            echo "Sleeping for 30 seconds before the next attempt"
+            sleep 30  # Wait for 30 seconds before retrying
+        fi
+
+        attempt=$((attempt + 1))
+    done
+
+    echo "test_backup failed after $max_retries attempts"
+    return 1  # Return an error if all attempts fail
+}
+
 function test_mariadb_logged {
     RAW_INVENTORY=/etc/kolla/inventory
     source $KOLLA_ANSIBLE_VENV_PATH/bin/activate
+    test_backup_with_retries
     test_recovery
 }