snapshot reversion fails via vzdump; succeeds using rbd snap

[alexskysilk]

I have a situation where a snapshot reversion for a container (rbd backed) is failing with the error "unable to read tail (got 0 byte)" in the tasklog. doing a manual reversion using rbd snap works fine.

proxmox-ve: 5.1-42 (running kernel: 4.15.3-1-pve)
pve-manager: 5.1-46 (running version: 5.1-46/ae8241d4)
pve-kernel-4.13: 5.1-42
pve-kernel-4.15: 5.1-1
pve-kernel-4.15.3-1-pve: 4.15.3-1
pve-kernel-4.13.13-6-pve: 4.13.13-42
pve-kernel-4.13.13-3-pve: 4.13.13-34
pve-kernel-4.13.4-1-pve: 4.13.4-26
ceph: 12.2.4-pve1
corosync: 2.4.2-pve3
criu: 2.11.1-1~bpo90
glusterfs-client: 3.8.8-1
ksm-control-daemon: 1.2-2
libjs-extjs: 6.0.1-2
libpve-access-control: 5.0-8
libpve-common-perl: 5.0-28
libpve-guest-common-perl: 2.0-14
libpve-http-server-perl: 2.0-8
libpve-storage-perl: 5.0-17
libqb0: 1.0.1-1
lvm2: 2.02.168-pve6
lxc-pve: 2.1.1-3
lxcfs: 2.0.8-2
novnc-pve: 0.6-4
proxmox-widget-toolkit: 1.0-11
pve-cluster: 5.0-20
pve-container: 2.0-19
pve-docs: 5.1-16
pve-firewall: 3.0-5
pve-firmware: 2.0-4
pve-ha-manager: 2.0-5
pve-i18n: 1.0-4
pve-libspice-server1: 0.12.8-3
pve-qemu-kvm: 2.9.1-9
pve-xtermjs: 1.0-2
qemu-server: 5.0-22
smartmontools: 6.5+svn4324-1
spiceterm: 3.0-5
vncterm: 1.5-3
zfsutils-linux: 0.7.6-pve1~bpo9

 

[dcsapak]

can you post the complete vm config and task log?

 

[alexskysilk]

I will if it happens again