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Hello all, I am a new user of Ceph. I am trying to stop an OSD, I can stop it (and all other OSDs on the node) using the command :
sudo stop ceph-osd-all. But the command: sudo stop ceph-osd id=0 returns an error user@node2:~$ ceph osd tree # id weight type name up/down reweight -1 0.36 root default -2 0.14 host node2 0 0.06999 osd.0 up 0 4 0.06999 osd.4 up 0 -3 0.14 host node3 1 0.06999 osd.1 up 1 3 0.06999 osd.3 up 1 -4 0.07999 host node4 2 0.07999 osd.2 up 1 user@node2:~$ sudo stop ceph-osd id=0 stop: Unknown instance: ceph/0 user@node2:~$ sudo stop ceph-osd-all ceph-osd-all stop/waiting user@node2:~$ ceph osd tree # id weight type name up/down reweight -1 0.36 root default -2 0.14 host node2 0 0.06999 osd.0 down 0 4 0.06999 osd.4 down 0 -3 0.14 host node3 1 0.06999 osd.1 up 1 3 0.06999 osd.3 up 1 -4 0.07999 host node4 2 0.07999 osd.2 up 1 Same when trying to start a single OSD, it doesn’t work. But I can start all OSDs on a node user@node2:~$ ceph osd tree # id weight type name up/down reweight -1 0.36 root default -2 0.14 host node2 0 0.06999 osd.0 down 0 4 0.06999 osd.4 down 0 -3 0.14 host node3 1 0.06999 osd.1 up 1 3 0.06999 osd.3 up 1 -4 0.07999 host node4 2 0.07999 osd.2 up 1 user@node2:~$ sudo start ceph-osd id=0 ceph-osd stop/waiting user@node2:~$ ceph osd tree # id weight type name up/down reweight -1 0.36 root default -2 0.14 host node2 0 0.06999 osd.0 down 0 4 0.06999 osd.4 down 0 -3 0.14 host node3 1 0.06999 osd.1 up 1 3 0.06999 osd.3 up 1 -4 0.07999 host node4 2 0.07999 osd.2 up 1 user@node2:~$ sudo start ceph-osd-all ceph-osd-all start/running user@node2:~$ ceph osd tree # id weight type name up/down reweight -1 0.36 root default -2 0.14 host node2 0 0.06999 osd.0 up 0 4 0.06999 osd.4 up 0 -3 0.14 host node3 1 0.06999 osd.1 up 1 3 0.06999 osd.3 up 1 -4 0.07999 host node4 2 0.07999 osd.2 up 1 Can you please advise me, what I am doing wrong and what’s the right way to stop/start a specific OSD Thanks in Advance Ali This email and any attachments are intended solely for the use of the individual or entity to whom it is addressed and may be confidential and/or privileged. If you are not one of the named recipients or have received this email in error, (i) you should not read, disclose, or copy it, (ii) please notify sender of your receipt by reply email and delete this email and all attachments, (iii) Dassault Systemes does not accept or assume any liability or responsibility for any use of or reliance on this email.
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