The GaleraClusterSizeMismatch alert fires when the Galera cluster does not have exactly three members.
Error / Incident
The datastore used by all OpenStack services might be having clustering issues.
In general, this alert is caused by either:
- Problems on a single node, which would also trigger other more specific alerts, or
- Maintenance (OS upgrades, node replacements) which hopefully have some relevant communications in -cloud-admin
Add here any new common issues you find.
Add here any new tasks for incidents you might encounter.