[SOLVED] LXC Backup randomly hangs at suspend

fabian

Proxmox Staff Member
Staff member
Jan 7, 2016
3,472
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113
the vzdump "snapshot" mode for Qemu is completely different from the vzdump "snapshot" mode for LXC. for LXC, snapshot mode needs a snapshot capable storage, like the ones I gave in my previous post. non-thin LVM has a kind of snapshot which PVE does not support, so neither storage snapshots nor snapshot mode will work for LXC containers.
 
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Andrii

Member
Jul 6, 2016
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Can I convert LVM to LVM-Thin without the data loss?
Code:
lvconvert --type thin-pool pve/data
 
Jun 21, 2011
42
1
8
Hi! I have Proxmox 4.3-3. lxcfs is version 2.0.4-pve1. I have a server with a single LXC container running as a Samba server on ZFS storage on localhost. It does not mount any external filesystem. It is set to backup to local folder storage. If I set the scheduled backup to use suspend mode, once in a while (like on 33% of backups), it hangs on "starting final sync", the backup never completes (I have waited for 4 days to make sure) and I have to run "pct unlock <VMID>" to be able to restart the cointainer (otherwise it reports "CT is locked (backup)"). Here you are the backup log:
Code:
INFO: starting new backup job: vzdump 100 --mailnotification always --mailto xxx@xxx.it --quiet 1 --storage local --compress lzo --mode suspend
INFO: Starting Backup of VM 100 (lxc)
INFO: status = running
INFO: backup mode: suspend
INFO: ionice priority: 7
INFO: CT Name: sambaserver
INFO: starting first sync /proc/2916/root// to /mnt/vztmp/vzdumptmp29573
INFO: Number of files: 126,697 (reg: 112,593, dir: 10,605, link: 3,464, dev: 2, special: 33)
INFO: Number of created files: 126,696 (reg: 112,593, dir: 10,604, link: 3,464, dev: 2, special: 33)
INFO: Number of deleted files: 0
INFO: Number of regular files transferred: 112,586
INFO: Total file size: 98,200,070,529 bytes
INFO: Total transferred file size: 98,199,810,113 bytes
INFO: Literal data: 98,199,810,113 bytes
INFO: Matched data: 0 bytes
INFO: File list size: 5,963,276
INFO: File list generation time: 0.020 seconds
INFO: File list transfer time: 0.000 seconds
INFO: Total bytes sent: 98,232,382,306
INFO: Total bytes received: 2,229,895
INFO: sent 98,232,382,306 bytes received 2,229,895 bytes 25,672,184.03 bytes/sec
INFO: total size is 98,200,070,529 speedup is 1.00
INFO: first sync finished (3826 seconds)
INFO: suspend vm
INFO: starting final sync /proc/2916/root// to /mnt/vztmp/vzdumptmp29573
 

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