Applies to SUSE Enterprise Storage 7.1
4 Ceph cluster administration #
This chapter introduces tasks that are performed on the whole cluster.
4.1 Shutting down and restarting the cluster #
To shut down the whole Ceph cluster for planned maintenance tasks, follow these steps:
Stop all clients that are using the cluster.
Verify that the cluster is in a healthy state. Use the following commands:
cephuser@adm >ceph statuscephuser@adm >ceph healthSet the following OSD flags:
cephuser@adm >ceph osd set nooutcephuser@adm >ceph osd set nobackfillcephuser@adm >ceph osd set norecoverShutdown service nodes one by one (non-storage workers).
Shutdown Ceph Monitor nodes one by one (masters by default).
Shutdown Admin Node (masters).
After you finish the maintenance, you can start the cluster again by running the above procedure in reverse order.