[ovirt-users] Cannot add Posix Storage

[Steve Kilduff]

Hi guys, trying to reply to a previous topic but I am certain I am not
doing it correct, regardless, here we go.

moosefs mounting on ovirt.

I am having similar problem to the person in the mail Cannot add Posix
Storage. This is an ovirt setup attempt with moosefs.

Mount options are:
Path:       mfsmount
VFS type: fuse
Mount opt: mfsmaster=mfsmaster,mfsport=9421,mfssubfolder=/ovirt,_netdev

I specified a subfolder which may not exist on your mfs storae.

In my setup, ovirt mounts the actual mfs mount without problem, the mount
remains mounted afterwards as ovirt does not seem to unmount it
successfully. I think the problem is the mount detection mechanism in
python, It is looking for a pattern to match both the source/destination of
the mount and failing: I hope this shows what I mean:
vsdm.log output:
OSError: [Errno 2] Mount of `mfsmount` at `/rhev/data-center/mnt/mfsmount`
does not exist

centos7 output of mount command:
mfsmaster:9421 on /rhev/data-center/mnt/mfsmount type fuse.mfs
(rw,relatime,user_id=0,group_id=0,allow_other)

Source = mfsmount in first error out line, and source = ''mfsmaster:9421'
on the OS, and I guess mount.py is trying to pattern match the mount and
doesnt compare them correctly and bails out.

I guess normally the source of the mount does not change name, like with
the specifics I gave to mount mfs.

I am trying to poke around the python to see if I can simply ignore this
check, but my python skills are non existent.

Also, as a workaround, I tried to first mount mfs without ovirt, and then
get ovirt to bind mount my /mnt/moosefs how-ever in centos7 bind mount
names are strange, I think broken when compared to centos6,  the output of
mount in centos7 when bind mounting /mnt/moosefs to /ovirt:
mfsmaster:9421 on /mnt/moosfs
mfsmaster:9421 on /ovirt

where as in centos6 it would be:
mfsmaster:9421 on /mnt/moosfs
/mnt/moosfs on /ovirt

Again, I think the pattern matching of mount.py is what fails during bind
mount also.

I think if bind mounting worked, the user could stick what-ever filesystem
they wanted onto the OS, and get ovirt to bind mount it. Then it's the
user's problem how to manage their FS.

Best,
Steve Kilduff
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ovirt.org/pipermail/users/attachments/20150825/76bab7d0/attachment-0001.html>