The documentation very briefly explains a few core commands for restarting
things;
https://docs.ceph.com/en/quincy/cephadm/operations/#starting-and-stopping-daemons
but I feel I'm lacking quite some details of what is safe to do.
I have a system in production, clusters connected via CephFS and some
shared block devices.
We would like to restart some things due to some new network
configurations. Going daemon by daemon would take forever, so I'm curious
as to what happens if one tries the command;
ceph orch restart osd
Will that try to be smart and just restart a few at a time to keep things
up and available. Or will it just trigger a restart everywhere
simultaneously.
I guess in my current scenario, restarting one host at the time makes most
sense, with a
systemctl restart ceph-{fsid}.target
and then checking that "ceph -s" says OK before proceeding to the next
host, but I'm still curious as to what the "ceph orch restart xxx" command
would do (but not enough to try it out in production)
Best regards, Mikael
Chalmers University of Technology
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