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No, it just had the sound of a potential root-cause, but if you're sure the sheepdog behaviour described therein only affects iSCSI, then it's probably not relevant here. Also, additional testing reveals that sheepdog is the problem, not PVE: even doing "dog rollback" from the CLI unexpectedly...

As far as we can determine: We took a live snapshot of a powered-on VM running on Sheepdog storage (not including memory) A little while later, powered off the VM and attempted to roll back. Rollback failed complaining that the disk already existed Looks like we attempted to rollback more than...

We've just encountered a situation where we took a snapshot of a sheepdog-based VDI, then later rolled it back - but on trying to roll back, failed, and not only didn't roll back the disk, but deleted the base disk, too. Can anyone else report on their success or failure using snapshots with...

Still not as stable as CEPH. I just tried rolling back on a snapshot, only to have sheepdog delete the base disk when the rollback failed. Not exactly a graceful failure mode... Sheepdog also fails miserably at online cluster operations like altering the # of copies kept - the entire cluster...

Oh, shoot, yes online-vs-offline would explain the results I'm seeing. I wasn't aware of that limitation. Some of the disks I can trim - and now have, to good effect - but others predate OSes with TRIM support (notably one particular Win2008R2 domain controller with a needlessly large disk). I...

I've been migrating VMs from NFS to Sheepdog, and I'm suddenly noticing that some of the virtual disks are consuming 100% of their stated capacity, i.e. thick-provisioned, not thin. Sheepdog is supposed to be able to thin-provision... and in fact does for some other disks - how do I "thin-ify"...

Only consistent kernel panics :-). It was not an acceptable solution.

Dietmar, as I've said elsewhere - this wasn't an upgrade. I expect the upgrade to work fine. What's broken for me is a brand-new, fresh install of Jewel on a fresh install of 4.3 immediately updated to 4.4.

Since there's a showstopper bug with creating new CEPH clusters in Jewel, I had to figure out how to remove it and reinstall Hammer the hard way: 0. "pveceph install -version hammer" to reset the apt/sources.list.d/ceph.list repository (or just fix it by hand) 1. "dpkg-query --list | grep...

Matthieu, lsblk never reports anything for the second partition. There is no filesystem on the second partition. Partitions to not get UUIDs by themselves; only whole disks and filesystems get UUIDs, so it makes sense that there is no UUID on the second partition. In any case, I can't...

Granted, but recall this was a fresh install of Jewel, Hammer was never installed here. I'll try following some of that anyway (once the site is back up...) and see what happens.

Nope. /dev/sdc1 is owned by ceph/ceph, but /dev/sdc2 is owned by root/root.

Nothing obviously wrong to me: root@pve1:~# ls -ld /var/lib/ceph/ drwxr-x--- 8 ceph ceph 4096 Dec 30 13:07 /var/lib/ceph/ The error more tends to indicate (to me, anyway) that the mountpoint wasn't chown'd after being mounted there. (All disks under linux AFAIK mount as root... is there a...

At the last step (ceph-activate), I get: root@pve1:~# ceph-disk activate /dev/sdc1 got monmap epoch 1 mount_activate: Failed to activate ceph-disk: Error: ['ceph-osd', '--cluster', 'ceph', '--mkfs', '--mkkey', '-i', u'2', '--monmap', '/var/lib/ceph/tmp/mnt.4Y75ui/activate.monmap', '--osd-data'...

I mean there no symlink to /dev/sdc2 exists in /dev/disk/by-partuuid to /dev/sdc2 until I put a filesystem on /dev/sdc2. Should I just change the symlink to (literal) "/dev/sdc2" ? Right now the symlink is to a non-existent entry in /dev/disk/by-partuuid.

I reformatted one of my two affected servers (both Dell PowerEdge 2950-III systems, one with 28GB RAM, one with 16GB RAM) to not have any ZFS data pools whatsoever. The non-ZFS server now survives the nightly backups. The ZFS server still kills *both* VMs running on it. Just before the OOM...

Not unless I put a filesystem on /dev/sdc2. What type should it be?

1. "activate.monmap" is not owned by ceph/ceph, it's owned by root/root. 2. "journal" points to a partition UUID that doesn't exist. 3. "ceph-osd --mkjournal -i 0" fails, with this error: root@pve1:~# ceph-osd --mkjournal -i 0 2017-01-03 10:45:15.398375 7f22b6992800 -1...

Aha! There's the "permission denied" error! (with journalctl -f still running in the background:) Drat, output too big to post here, see http://pastebin.com/AqF1bGSP

That's not working either: root@pve1:~# cat /proc/partitions major minor #blocks name 1 0 65536 ram0 1 1 65536 ram1 1 2 65536 ram2 1 3 65536 ram3 1 4 65536 ram4 1 5 65536 ram5 1 6 65536...