The GaleraDown alert fires when mysqld exporter can't connect to the MariaDB instance on a cloudcontrol node.
Error / Incident
The datastore used by all OpenStack services is unreachable.
Log in to the host in question, then:
- Check if you can log in to the MariaDB host manually:
user@cloudcontrolXXXX ~ $ sudo -i mariadb -u root
- Check the mysqld-exporter logs:
user@cloudcontrolXXXX ~ $ sudo systemctl status prometheus-mysqld-exporter.service
Add here any new common issues you find.
Add here any new tasks for incidents you might encounter.