To reboot the Ceph Storage nodes, follow this process:
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Select the first Ceph Storage node to reboot and log into it.
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Disable Ceph Storage cluster rebalancing temporarily:
$ ceph osd set noout $ ceph osd set nobackfill $ ceph osd set norecover
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Reboot the node:
$ reboot
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Wait until the node boots.
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Log into the node and check the cluster status:
$ ceph -s
Verify all OSDs, MON and MGR services have started and rejoined cluster
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Log out of the node, reboot the next node, and check its status. Repeat this process until you have rebooted all Ceph storage nodes.
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When complete, enable cluster rebalancing again:
$ ceph osd unset noout $ ceph osd unset nobackfill $ ceph osd unset norecover
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Perform a final status check to make sure the cluster reports
HEALTH_OK
:$ ceph -s