Proxmox LXC backup fails - Older CentOS VMs


Nov 8, 2019

I have all the latest updated Virtual Environment 7.4-17 with latest version of everything upgraded including the kernel as of Nov 18th 2023.

Backups of centos 7 LXC containers started to fails with Suspend mode. If Stop mode is in use, backup works.

The actual issue is this one. Backup on Ubuntu 18, 20, 22 works just fine in Suspend mode. Only CentOS is impacted. It started to happen around November 12-15th, 2023.

Some update took place that no longer supports Centos older containers?

# pct suspend 100
lxc-checkpoint: 100: ../src/lxc/criu.c: do_dump: 1297 dump failed with 1
lxc-checkpoint: 100: ../src/lxc/criu.c: do_dump: 1311 criu output:
lxc-checkpoint: 100: ../src/lxc/tools/lxc_checkpoint.c: checkpoint: 182 Checkpointing 100 failed
command 'lxc-checkpoint -n 100 -s -D /var/lib/vz/dump' failed: exit code 1

# criu --version
Version: 3.15

Please advice what can be done to allow backups with Suspend.
Last edited:
Just as additional step, these are my pveversion details

# pveversion -v
proxmox-ve: 7.4-1 (running kernel: 5.15.131-1-pve)
pve-manager: 7.4-17 (running version: 7.4-17/513c62be)
pve-kernel-5.15: 7.4-8
pve-kernel-5.4: 6.4-20
pve-kernel-5.15.131-1-pve: 5.15.131-2
pve-kernel-5.15.126-1-pve: 5.15.126-1
pve-kernel-5.15.74-1-pve: 5.15.74-1
pve-kernel-5.4.203-1-pve: 5.4.203-1
ceph-fuse: 14.2.21-1
corosync: 3.1.7-pve1
criu: 3.15-1+pve-1
glusterfs-client: 9.2-1
ifupdown: residual config
ifupdown2: 3.1.0-1+pmx4
ksmtuned: 4.20150326
libjs-extjs: 7.0.0-1
libknet1: 1.24-pve2
libproxmox-acme-perl: 1.4.4
libproxmox-backup-qemu0: 1.3.1-1
libproxmox-rs-perl: 0.2.1
libpve-access-control: 7.4.1
libpve-apiclient-perl: 3.2-1
libpve-common-perl: 7.4-2
libpve-guest-common-perl: 4.2-4
libpve-http-server-perl: 4.2-3
libpve-rs-perl: 0.7.7
libpve-storage-perl: 7.4-3
libspice-server1: 0.14.3-2.1
lvm2: 2.03.11-2.1
lxc-pve: 5.0.2-2
lxcfs: 5.0.3-pve1
novnc-pve: 1.4.0-1
proxmox-backup-client: 2.4.4-1
proxmox-backup-file-restore: 2.4.4-1
proxmox-kernel-helper: 7.4-1
proxmox-mail-forward: 0.1.1-1
proxmox-mini-journalreader: 1.3-1
proxmox-widget-toolkit: 3.7.3
pve-cluster: 7.3-3
pve-container: 4.4-6
pve-docs: 7.4-2
pve-edk2-firmware: 3.20230228-4~bpo11+1
pve-firewall: 4.3-5
pve-firmware: 3.6-6
pve-ha-manager: 3.6.1
pve-i18n: 2.12-1
pve-qemu-kvm: 7.2.0-8
pve-xtermjs: 4.16.0-2
qemu-server: 7.4-4
smartmontools: 7.2-pve3
spiceterm: 3.2-2
swtpm: 0.8.0~bpo11+3
vncterm: 1.7-1


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