WHAT
The alert manager pod currently uses an ephemeral volume. During events such as node restarts, OSD/RHOAM upgrades, etc. which cause the alert-manager pod to be restarted, alerts which have been silenced are lost and have resulted in unnecessary PD incidents.

HOW
Mounting the alertmanager.yaml as a persistent volume would preserve the silence status when the alert manager pod is restarted. Currently the config in RHOAM is under 4K, a 1Mi volume would provide plenty of space for even the most complex alert manager config for any our products using OO.

TESTS
Once alertmanager.yaml has been mounted on a PV:

1. snooze an alert
2. delete the pod
3. confirm that the snoozed alert is still snoozed

DONE

• mount alertmanager.yaml onto 1Mi PV