On 04/12/2020 11:36, Arjen via pve-user wrote:
On Fri, 2020-12-04 at 11:22 +0100, Frank Thommen wrote:
On 04/12/2020 09:30, Frank Thommen wrote:
On Thursday, December 3, 2020 10:16 PM, Frank Thommen
<[email protected]> wrote:
Dear all,
on our PVE cluster, the backup of a specific VM always fails
(which
makes us worry, as it is our GitLab instance). The general
backup plan
is "back up all VMs at 00:30". In the confirmation email we
see, that
the backup of this specific VM takes six to seven hours and
then fails.
The error message in the overview table used to be:
vma_queue_write: write error - Broken pipe
With detailed log
-------------------------------------------------------------
-------------------------------------------------------------
-------------------------------------------------------------
-------------------------------------------------------------
-------------------------------------------------------------
-------------------------------------------------------------
-----------------------------------------------
123: 2020-12-01 02:53:08 INFO: Starting Backup of VM 123 (qemu)
123: 2020-12-01 02:53:08 INFO: status = running
123: 2020-12-01 02:53:09 INFO: update VM 123: -lock backup
123: 2020-12-01 02:53:09 INFO: VM Name: odcf-vm123
123: 2020-12-01 02:53:09 INFO: include disk 'virtio0'
'ceph-rbd:vm-123-disk-0' 20G
123: 2020-12-01 02:53:09 INFO: include disk 'virtio1'
'ceph-rbd:vm-123-disk-2' 1000G
123: 2020-12-01 02:53:09 INFO: include disk 'virtio2'
'ceph-rbd:vm-123-disk-3' 2T
123: 2020-12-01 02:53:09 INFO: backup mode: snapshot
123: 2020-12-01 02:53:09 INFO: ionice priority: 7
123: 2020-12-01 02:53:09 INFO: creating archive
'/mnt/pve/cephfs/dump/vzdump-qemu-123-2020_12_01-
02_53_08.vma.lzo'
123: 2020-12-01 02:53:09 INFO: started backup task
'a38ff50a-f474-4b0a-a052-01a835d5c5c7'
123: 2020-12-01 02:53:12 INFO: status: 0%
(167772160/3294239916032),
sparse 0% (31563776), duration 3, read/write 55/45 MB/s
[... ecc. ecc. ...]
123: 2020-12-01 09:42:14 INFO: status: 35%
(1170252365824/3294239916032), sparse 0% (26845003776),
duration 24545,
read/write 59/56 MB/s
123: 2020-12-01 09:42:14 ERROR: vma_queue_write: write error -
Broken
pipe
123: 2020-12-01 09:42:14 INFO: aborting backup job
123: 2020-12-01 09:42:15 ERROR: Backup of VM 123 failed -
vma_queue_write: write error - Broken pipe
-------------------------------------------------------------
-------------------------------------------------------------
-------------------------------------------------------------
-------------------------------------------------------------
-------------------------------------------------------------
-------------------------------------------------------------
-------------------------------------------------------------
-------------------------------------------------------------
-------------------------------------------------------------
-------------------------------------------------------------
-------------------------------------------------------------
-------------------------------------------------------------
-------------------------------------------------------------
-------------------------------------------------------------
-------------------------------------------------------------
-------------------------------------------------------------
----------!
---------
-----------------------------------------------------------------
-----------------------------------------------------------------
-----------------------------------------------------------------
-----------------------------------------------------------------
----------------------------------
Since lately (upgrade to the newest PVE release) it's
VM 123 qmp command 'query-backup' failed - got timeout
with log
-------------------------------------------------------------
-------------------------------------------------------------
123: 2020-12-03 03:29:00 INFO: Starting Backup of VM 123 (qemu)
123: 2020-12-03 03:29:00 INFO: status = running
123: 2020-12-03 03:29:00 INFO: VM Name: odcf-vm123
123: 2020-12-03 03:29:00 INFO: include disk 'virtio0'
'ceph-rbd:vm-123-disk-0' 20G
123: 2020-12-03 03:29:00 INFO: include disk 'virtio1'
'ceph-rbd:vm-123-disk-2' 1000G
123: 2020-12-03 03:29:00 INFO: include disk 'virtio2'
'ceph-rbd:vm-123-disk-3' 2T
123: 2020-12-03 03:29:01 INFO: backup mode: snapshot
123: 2020-12-03 03:29:01 INFO: ionice priority: 7
123: 2020-12-03 03:29:01 INFO: creating vzdump archive
'/mnt/pve/cephfs/dump/vzdump-qemu-123-2020_12_03-
03_29_00.vma.lzo'
123: 2020-12-03 03:29:01 INFO: started backup task
'cc7cde4e-20e8-4e26-a89a-f6f1aa9e9612'
123: 2020-12-03 03:29:01 INFO: resuming VM again
123: 2020-12-03 03:29:04 INFO: 0% (284.0 MiB of 3.0 TiB) in 3s,
read:
94.7 MiB/s, write: 51.7 MiB/s
[... ecc. ecc. ...]
123: 2020-12-03 09:05:08 INFO: 36% (1.1 TiB of 3.0 TiB) in 5h
36m 7s,
read: 57.3 MiB/s, write: 53.6 MiB/s
123: 2020-12-03 09:22:57 ERROR: VM 123 qmp command 'query-
backup' failed
- got timeout
123: 2020-12-03 09:22:57 INFO: aborting backup job
123: 2020-12-03 09:32:57 ERROR: VM 123 qmp command 'backup-
cancel'
failed - unable to connect to VM 123 qmp socket - timeout
after
5981 retries
123: 2020-12-03 09:32:57 ERROR: Backup of VM 123 failed -
VM 123 qmp
command 'query-backup' failed - got timeout
The VM has some quite big vdisks (20G, 1T and 2T). All stored
in Ceph.
There is still plenty of space in Ceph.
Can anyone give us some hint on how to investigate and debug
this
further?
Because it is a write error, maybe we should look at the backup
destination.
Maybe it is a network connection issue? Maybe something wrong
with the
host? Maybe the disk is full?
Which storage are you using for backup? Can you show us the
corresponding entry in /etc/pve/storage.cfg?
We are backing up to cephfs with still 8 TB or so free.
/etc/pve/storage.cfg is
------------
dir: local
path /var/lib/vz
content vztmpl,backup,iso
dir: data
path /data
content snippets,images,backup,iso,rootdir,vztmpl
cephfs: cephfs
path /mnt/pve/cephfs
content backup,vztmpl,iso
maxfiles 5
rbd: ceph-rbd
content images,rootdir
krbd 0
pool pve-pool1
------------
The problem has reached a new level of urgency, as since two days
each
time after a failed backup the VMm becomes unaccessible and has to be
stopped and started manually from the PVE UI.
I don't see anything wrong the configuration that you shared.
Was anything changed in the last few days since the last successful
backup? Any updates from Proxmox? Changes to the network?
I know very little about Ceph and clusters, sorry.
What makes this VM different, except for the size of the disks?
On December 1st the Hypervisor has been updated to PVE 6.3-2 (I think
from 6.1-3). After that the error message slightly changed and - in
hindsight - since then the VM stops being accessible after the failed
backup.
However: The VM never ever backed up successfully, not even before the
PVE upgrade. It's just that no one really took notice of it.
The VM is not really special. It's our only Debian VM (but I hope
that's not an issue :-) and the VM has been migrated 1:1 from oVirt by
migrating and importing the disk images. But we have a few other such
VMs and they run and back up just fine.
No network changes. Basically nothing changed that I could think of.
But to be clear: Our current main problem is the failing backup, not the
crash.
Cheers, Frank
_______________________________________________
pve-user mailing list
[email protected]
https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-user
