On 1/30/20 1:34 PM, vishal@xxxxxxxxxxxxxxx wrote: > Iam testing failure scenarios for my cluster. I have 3 monitors. Lets say if mons 1 and 2 go down and so monitors can't form a quorum, how can I recover? > > Are the instructions at followling link valid for deleting mons 1 and 2 from monmap, https://access.redhat.com/documentation/en-us/red_hat_ceph_storage/1.2.3/html/red_hat_ceph_administration_guide/remove_a_monitor#removing-monitors-from-an-unhealthy-cluster > > One more question - lets say I delete mons 1 and 2 from monmap. And the cluster has only mon 3 remaining so mon 3 has quorum. Now what happens if mon 1 and 2 come up? Do they join mon 3 and so there will again be 3 monitors in the cluster? > The epoch of the monmap has increased by removing mons 1 and 2 from the map. Only mon 3 has this new map with the new epoch. Therefor, if mon 1 and 2 boot they see the epoch of mon 3 is newer and thus won't be able to join. Wido > Thanks > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx > _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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