snapshot backup is not working now

[chengkinhung]

Hi every one, I just installed new 6.1 PVE and found snapshot backup is not working at all.

I found the backup log ceased after the following line:
INFO: issuing guest-agent 'fs-freeze' command

I guess maybe qemu-guest-agent cause this issue, so I login into VM(CentOS7) and stop qemu-guest-agent, and then try to run backup again, the backup run successfully.

Here is my PVE environment and guest VM information:

[Host]# pveversion
pve-manager/6.1-3/37248ce6 (running kernel: 5.3.10-1-pve)

[VM]# cat /etc/redhat-release
CloudLinux release 7.7 (Valery Bykovsky)

[VM]# uname -a
Linux *** 3.10.0-962.3.2.lve1.5.26.7.el7.x86_64 #1 SMP Wed Oct 2 07:53:12 EDT 2019 x86_64 x86_64 x86_64 GNU/Linux

[VM]# rpm -q qemu-guest-agent
qemu-guest-agent-2.12.0-3.el7.x86_64

Here is the failed backup logs:

INFO: starting new backup job: vzdump 101 --storage local --node cv30 --mode snapshot --compress lzo --remove 0
INFO: Starting Backup of VM 101 (qemu)
INFO: Backup started at 2020-03-13 20:26:55
INFO: status = running
INFO: update VM 101: -lock backup
INFO: VM Name: ***
INFO: include disk 'scsi0' 'local-zfs:vm-101-disk-0' 1616282092831
INFO: include disk 'scsi1' 'local-zfs:vm-101-disk-1' 64G
INFO: backup mode: snapshot
INFO: ionice priority: 7
INFO: creating archive '/var/lib/vz/dump/vzdump-qemu-101-2020_03_13-20_26_55.vma.lzo'
INFO: issuing guest-agent 'fs-freeze' command

 

[fabian]

that looks like the freeze in your guest hangs (or just takes a long time).

 

[chengkinhung]

Hi fabian, thanks for notice. Yes, it is, guest VM got high load average after running backup, and unable to control even I stop the backup (can not shutdown or poweroff, need to kill KVM process in Host). I am looking how to update the qemu-guest-agent package for my CentOS 7(CloudLinux).