Tonight one of vms which I backup weekly broke when proxmox issues guest-agent 'fs-freeze' command.
I could ping the server, but nothing works (almost every port were down, the remaining didn't respond to anything and I couldn't ssh to it). Although I haven't faced this issue in three years using proxmox and last three month enabling and installing qemu-guest-agent on host and vm, I waited for 20 minutes and nothing happens, then I stopped the backup, logged in to host and entered qm unlock 201 && qm reset 201 (201 is VMID of broken vm) Then when vm gets booted I edited grub command line and add this to the end (just to be sure filesystem hasn't corrupted): fsck.mode=force fsck.repair=yes When the server was booting up lots of errors were getting fixed, errors were like this: [ 170.013464] systemd-fsck: Free blocks count wrong for group #2160 (23153, counted=23948). [ 170.014860] systemd-fsck: Fix? yes and this [ 170.142921] systemd-fsck: Directories count wrong for group #2000 (1394, counted=871). [ 170.145106] systemd-fsck: Fix? yes Then the server boots up and everything was fine. I ran a manual backup again and the same problem happens, everything freezes when backup reaches guest-agent 'fs-freeze' command and I couldn't do anything expect unlock and forcefully reset the vm. Server is updated CentOS 7 (2003) with cPanel installed on it. I don't know if this helps or not, but the vm has three hard disks, only backup of the first one which OS is installed on it, is enabled. First hard disk is in "sas" directory and backup gets written to another directory "sata". Also log of first scheduled backup is here (manual backup error log is exactly the same): INFO: Starting Backup of VM 201 (qemu) INFO: Backup started at 2020-05-09 02:00:58 INFO: status = running INFO: VM Name: ircpanel1 INFO: include disk 'virtio0' 'sas:201/vm-201-disk-0.qcow2' 80G INFO: exclude disk 'virtio1' 'sata:201/vm-201-disk-0.qcow2' (backup=no) INFO: exclude disk 'virtio2' 'sata:201/vm-201-disk-1.qcow2' (backup=no) INFO: backup mode: snapshot INFO: ionice priority: 7 INFO: creating archive '/mnt/pve/sata/dump/vzdump-qemu-201-2020_05_09-02_00_58.vma.lzo' INFO: issuing guest-agent 'fs-freeze' command closing with read buffer at /usr/share/perl5/IO/Multiplex.pm line 927. ERROR: interrupted by signal INFO: issuing guest-agent 'fs-thaw' command TASK ERROR: got unexpected control message:
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