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Ceph Cookbook - Second Edition by Karan Singh, Michael Hackett, Vikhyat Umrao

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Checking the MON quorum status

To maintain a quorum between Ceph MONs, the cluster should always have more than half of the available monitors in a Ceph cluster. Checking the quorum status of a cluster is very useful at the time of MON troubleshooting. You can check the quorum status by using the ceph command and the quorum_status subcommand:

# ceph quorum_status -f json-pretty

The following screenshot displays the output of this command:

The quorum status displays election_epoch, which is the election version number, and quorum_leader_name, which denotes the hostname of the quorum leader. It also displays the MON map epoch and cluster ID. ...

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