[PVE-User] Live migration of LXC containers causes container disk corruption.

Carles Xavier Munyoz Baldó carles at unlimitedmail.org
Mon Jan 22 11:29:06 CET 2018


Hi,
I have a two nodes Proxmox cluster with a directory storate with DRBD in
Primary/Primary mode. I can live migrate kvm virtual machines without
problems, but I have problems when I migrate a LXC container from one
node to the other.

The contaniner shutdowns correctly in the source node and starts fine in
the destination node, but sudenly in the destination Proxmox node begin
to appear logs like these ones and the file system in the container is
remounted read-only:
[...]
kernel: [440900.380974] EXT4-fs error (device drbd2):
ext4_validate_block_bitmap:384: comm loop1: bg 9770: bad block bitmap
checksum

kernel: [440900.383052] EXT4-fs (drbd2): Delayed block allocation failed
for inode 55312404 at logical offset 45876746 with max blocks 2 with
error 74

kernel: [440900.384651] EXT4-fs (drbd2): This should not happen!! Data
will be lost

kernel: [440900.384651]

kernel: [440900.387703] print_req_error: I/O error, dev loop1, sector
209987952

kernel: [440900.389506] Aborting journal on device loop1-8.

kernel: [440900.394396] EXT4-fs error (device loop1):
ext4_journal_check_start:60: Detected aborted journal

kernel: [440900.396204] EXT4-fs (loop1): Remounting filesystem read-only

kernel: [440902.709123] EXT4-fs warning (device loop1): kmmpd:190: kmmpd
being stopped since filesystem has been remounted as readonly.
[...]

It seems that the virtual disk for the container becamos corrupt because
the solution to the problem is copy the disk to a new one and assign
this new one to the container.

Why is happening this?
Am I doing something incorrect for migrate one container from one node
to the other in the cluster?

Thank you in advance for your help.

========================================
SOLTECSIS SOLUCIONES TECNOLOGICAS, S.L.
Carles Xavier Munyoz Baldó
Departamento de I+D+I
Tel./Fax: 966 446 046
cmunyoz at soltecsis.com
www.soltecsis.com
========================================

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