Ceph » CephFS

Seen on ceph v14.2.9 in a containerised cluster with 3 MDS nodes

Both standby MGR containers are manually stopped. ceph reports a sensible alarm:

With only 1 MDS remaining we have an alarm on ceph health:

health: HEALTH_WARN
            insufficient standby MDS daemons available

Then I manually stop the final, active MDS damon.

Expected:

`ceph health` should report an alarm that there are no active MDS daemons and all filesystems are degraded / inactive.

Actual:

`ceph health` continues to report "insufficent standby". There are no new alarms about the total lack of active MDS daemons.

health: HEALTH_WARN
            insufficient standby MDS daemons available

ceph status shows:

mds: cephfs:1 {0=albamons_sc2=up:active(laggy or crashed)}

If I then stop the active (and only remaining) MGR, we got an alarm reported on ceph health:

health: HEALTH_WARN
no active mgr