Thanks for the suggestions, and will future check for LVM volumes, etc... the kernel version is the following 3.10.0-327.4.4.el7.x86_64 and the OS is CentOS 7.2.1511 (Core) Best, Martin On Mon, Sep 10, 2018 at 12:23 PM Ilya Dryomov <idryomov@xxxxxxxxx> wrote: > > On Mon, Sep 10, 2018 at 10:46 AM Martin Palma <martin@xxxxxxxx> wrote: > > > > We are trying to unmap an rbd image form a host for deletion and > > hitting the following error: > > > > rbd: sysfs write failed > > rbd: unmap failed: (16) Device or resource busy > > > > We used commands like "lsof" and "fuser" but nothing is reported to > > use the device. Also checked for watcher with "rados -p pool > > listwatchers image.rbd" but there aren't any listed. > > The device is still open by someone. Check for LVM volumes, multipath, > loop devices etc. None of those typically show up in lsof. > > > > > By investigating `/sys/kernel/debug/ceph/<cluster-id>/osdc` we get: > > > > 160460241 osd150 19.b2af34 image.rbd > > 231954'1271503593144320 watch > > Which kernel is that? > > > > > Our goal is to unmap the image for deletion so if the unmap process > > should destroy the image is for us OK. > > > > Any help/suggestions? > > On newer kernels you could do "rbd umap -o force <device>", but it > looks like you are running an older kernel. > > Thanks, > > Ilya _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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