Could you add a new mode to check Galera Cluster: https://galeracluster.com/library/training/tutorials/galera-monitoring.html

There are different "SHOW GLOBAL STATUS" that allows to now:

• Node/Cluster status
• Replication health

SELECT * FROM information_schema.global_status WHERE variable_name IN ('WSREP_CLUSTER_STATUS','WSREP_LOCAL_STATE_COMMENT','WSREP_CLUSTER_SIZE','WSREP_READY');
+---------------------------+---------------------------+
| VARIABLE_NAME             | VARIABLE_VALUE            |
+---------------------------+---------------------------+
| WSREP_LOCAL_STATE_COMMENT | Synced                    |
| WSREP_CLUSTER_SIZE        | 3                         |
| WSREP_CLUSTER_STATUS      | Primary                   |
| WSREP_READY               | ON                        |
+---------------------------+---------------------------+