It has to be mounted from somewhere, if that server goes offline, you need to mount it from somewhere else right?
On Thu, Feb 28, 2019 at 11:15 PM David Turner <[email protected]> wrote: > Why are you making the same rbd to multiple servers? > > On Wed, Feb 27, 2019, 9:50 AM Ilya Dryomov <[email protected]> wrote: > >> On Wed, Feb 27, 2019 at 12:00 PM Thomas <[email protected]> wrote: >> > >> > Hi, >> > I have noticed an error when writing to a mapped RBD. >> > Therefore I unmounted the block device. >> > Then I tried to unmap it w/o success: >> > ld2110:~ # rbd unmap /dev/rbd0 >> > rbd: sysfs write failed >> > rbd: unmap failed: (16) Device or resource busy >> > >> > The same block device is mapped on another client and there are no >> issues: >> > root@ld4257:~# rbd info hdb-backup/ld2110 >> > rbd image 'ld2110': >> > size 7.81TiB in 2048000 objects >> > order 22 (4MiB objects) >> > block_name_prefix: rbd_data.3cda0d6b8b4567 >> > format: 2 >> > features: layering >> > flags: >> > create_timestamp: Fri Feb 15 10:53:50 2019 >> > root@ld4257:~# rados -p hdb-backup listwatchers >> rbd_data.3cda0d6b8b4567 >> > error listing watchers hdb-backup/rbd_data.3cda0d6b8b4567: (2) No such >> > file or directory >> > root@ld4257:~# rados -p hdb-backup listwatchers >> rbd_header.3cda0d6b8b4567 >> > watcher=10.76.177.185:0/1144812735 client.21865052 cookie=1 >> > watcher=10.97.206.97:0/4023931980 client.18484780 >> > cookie=18446462598732841027 >> > >> > >> > Question: >> > How can I force to unmap the RBD on client ld2110 (= 10.76.177.185)? >> >> Hi Thomas, >> >> It appears that /dev/rbd0 is still open on that node. >> >> Was the unmount successful? Which filesystem (ext4, xfs, etc)? >> >> What is the output of "ps aux | grep rbd" on that node? >> >> Try lsof, fuser, check for LVM volumes and multipath -- these have been >> reported to cause this issue previously: >> >> http://tracker.ceph.com/issues/12763 >> >> Thanks, >> >> Ilya >> _______________________________________________ >> ceph-users mailing list >> [email protected] >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> > _______________________________________________ > ceph-users mailing list > [email protected] > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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