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Adding Monitoring and Management Node

I am build a cluster of 6 nodes.

In that i need two node failure,  so for that  i need minimum of 4 monitor.

In Petasan i didn't  find a way to add  4th Management and Monitoring Services.

How to add 4t node as Management and Monitoring Services.

you can use ceph cli commands to add monitor on node 4,5

Note that default PetaSAN setup allows 2 node failures, but not 2 out of the first 3.

If I add one Ceph MON node using CLI commands, there will be four MONs, correct?

So, if I shut down two Petasan manager nodes, will it work with one Petasan manager node and the one MON node that I added using Ceph CLI commands?