Hi all,
I have a 3 nodes CEPH cluster, each node with 4 OSD and 1 monitor and replication across hosts defined in the crushmap. 2 pools (1 size=3, min-size=2 , 1 size=2 min-size 2) One of the nodes failed (hardware failure) so I removed it from the crush map and change replication from host to osd. After reconstruction cluster health is ok now (with a warning for the monitor down) While I managed to restore the 3rd node is there a way to cover a 2nd node failure, leaving just 1 node in the cluster (disk space used does not exceed 1 node capacity). I assume i will have to set up an external monitor, but what else ? Olivier
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