Go daemon to get state of MariaDB Galera Cluster.
Run daemon manually with ./galera-clustercheck. By default it will connect to MariaDB server using a Unix domain socket at /run/mysqld/mysqld.sock and use credentials from a MySQL option file at /etc/galera-clustercheck/my.cnf.
See available options with ./galera-clustercheck -help.
- Start daemon:
# ./galera-clustercheck
2022/01/19 10:19:51 Listening...
- Query status using curl:
# curl -i localhost:8000
HTTP/1.1 200 OK
Date: Wed, 19 Jan 2022 09:19:53 GMT
Content-Length: 21
Content-Type: text/plain; charset=utf-8
Node in Synced state
# curl -i localhost:8000/master
HTTP/1.1 200 OK
Date: Wed, 19 Jan 2022 09:19:55 GMT
Content-Length: 48
Content-Type: text/plain; charset=utf-8
Node in Synced state and 'wsrep_local_index==0'
Copy systemd.service to /etc/systemd/system/galera-clustercheck.service, run systemctl daemon-reload and start/enable service it as you see fit.