[ceph-users] Need Clarification on Maintenance Shutdown Procedure

Hello, I've had a look at the instructions for clean shutdown given at https://ceph.io/planet/how-to-do-a-ceph-cluster-maintenance-shutdown/, but I'm not clear about some things on the steps about shutting down the various Ceph components. For my current 3-node cluster I have MONs, MDSs, MGRs, and OSDs all running on the same nodes. Also, this is a non-container installation. Since I don't have separate dedicated nodes, as described in the referenced web page, I think the instructions mean that I need to issue SystemD commands to stop the corresponding services/targets on each node for the Ceph components mentioned in each step. Since we want to bring services up in the right order, I should also use SystemD commands to disable these services/targets so they don't automatically restart when I power the nodes back on. After power-on, I would then re-enable and manually start services/targets in the order described. One other specific question: For step 4 it says to shut down my service nodes. Does this mean my MDSs? (I'm not running any Object Gateways or NFS, but I think these would go in this step as well?) Please let me know if I've got this right. The cluster contains 200TB of a researcher's data that has taken a year to collect, so caution is needed. Thanks. -Dave -- Dave Hall Binghamton University kdhall(a)binghamton.edu