This is not common unless you are using the kernel driver to map an RBD on a host running OSDs. I've never had a problem unmounting an RBD that didn't have open file handles. Note that Linux considers an FS to be active if a terminal, screen, etc is cd'd into the mounted directory. Do you need to service files via NFS to non-linux servers? If not, you might want to go the CephFS route.
If however you were using the kernel driver to map an RBD on a host running OSDs, then there is a known deadlock that can happen and try rebooting the machine before either changing the host you're mapping the RBD to or switching to rbd-fuse or rbd-nbd. On Sun, May 27, 2018 at 8:13 PM Joshua Collins <[email protected]> wrote: > Hi > > I've set up a Ceph Cluster with and RBD storage device for use in a > pacemaker/corosync cluster. When attempting to move the resources from one > node to the other, the filesystem on the RBD will not unmount. lsof and > fuser show no files in use on the device. I thought this may be an issue > with an NFS lock, so I moved the ceph OSD and monitor off the machine where > the filesystem is mounted to a virtual machine, however I'm still unable to > unmount the filesystem. > > Is this a known issue with RBD filesystem mounts? Is there a system change > I need to make in order to get the filesystem to reliably unmount? > > Thanks in advance, > -- > *Joshua Collins* > Systems Engineer > [image: VRT Systems] > 38b Douglas Street > Milton QLD 4064 T +61 7 3535 9615 > F +61 7 3535 9699 > E [email protected] > > www.vrt.com.au > Follow us on: > [image: Linked In] <http://www.linkedin.com/company/vrt-systems> [image: > twitter] <https://twitter.com/vrtsystems> [image: Google Plus] > <http://plus.google.com/+VRTau> [image: YouTube] > <http://www.youtube.com/channel/UCYM0BsFRzVVvHXhhoSDnVug> This email is > the property of VRT Systems, a division of Vector International Pacific > Pty. Ltd. ACN: 009 278 979. The information contained in this email is > confidential and is intended only for the use of the addressee(s). If you > have received this email in error, please immediately notify the sender and > delete the email. Thank you. > _______________________________________________ > ceph-users mailing list > [email protected] > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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