[Users] Restore error, undump failed: No such device

[Nils Effenberger]

Happy new year folks,

we've got an openvz cluster with two nodes running debian 7.6 and
2.6.32-openvz-042stab092.3-amd64.
Networking of the containers is done via bridged vlan interfaces.
vlan-raw-device is a bond interface in mode 1 (failover) over eth0 and
eth1.

The interfaces where added in the containers via 
vzctl set CTID --netif_add=eth0,,,,<bridge>
this triggers an unmodiefied /usr/sbin/vznetaddbr

When I try to live-migrate a container to the other node I run into
following error: 
root at openvz1:~# vzmigrate -v -f=cpu -r no \
--live --keep-dst openvz2 651700

[...]
Container is mounted
        undump...
Setting CPU units: 1000
Setting CPUs: 1
Configure veth devices: veth651700.0 
Adding interface veth651700.0 to bridge br507 on CT0 for CT651700
Restore error, undump failed: No such device
Error: netdev 4115 rst failed -19
Error: rst_restore_net: -19
Container restore failed

Container is unmounted
Error: Failed to undump container
Resuming...

Relevant kernel messages of the destination node:

Jan  6 12:48:09 openvz2 kernel: [12206877.941140] CT: 205623: checkpointed
Jan  6 16:01:36 openvz2 kernel: [12218496.823161] CT: 651700: started
Jan  6 16:01:37 openvz2 kernel: [12218497.648247] device veth651700.0 entered promiscuous mode
Jan  6 16:01:37 openvz2 kernel: [12218497.648601] br507: port 2(veth651700.0) entering listening state
Jan  6 16:01:37 openvz2 kernel: [12218497.659436] CPT ERR: ffff881f75271000,651700 :netdev 4115 rst failed -19
Jan  6 16:01:37 openvz2 kernel: [12218497.659706] CPT ERR: ffff881f75271000,651700 :rst_restore_net: -19
Jan  6 16:01:37 openvz2 kernel: [12218497.702244] br507: port 2(veth651700.0) entering disabled state
Jan  6 16:01:37 openvz2 kernel: [12218497.719653] device veth651700.0 left promiscuous mode
Jan  6 16:01:37 openvz2 kernel: [12218497.719934] br507: port 2(veth651700.0) entering disabled state
Jan  6 16:01:37 openvz2 kernel: [12218497.883689] CT: 651700: stopped

NETIF variable of the container:
NETIF="ifname=eth0,bridge=br507,mac=00:18:51:F6:C9:BB,host_ifname=veth651700.0,host_mac=00:18:51:0E:74:94"

bridge on the source node:
root at openvz1:/etc/vz# brctl show br507
bridge name     bridge id               STP enabled     interfaces
br507           8000.0018510e7494       yes             veth651700.0
                                                        vlan507
bridge on the destination node:
root at openvz2:~# brctl show br507
bridge name     bridge id               STP enabled     interfaces
br507           8000.002590f456cf       yes             vlan507

If you need further information let me know.

BTW: Live migration works on a secend cluster with the same configuration 
without problems. The only difference is the kernel version:
2.6.32-openvz-042stab094.7-amd64

And I'm pretty sure that it was working last year and "I didn't do anything" ;)

Thanks in advance for any feedback.

Regards,
Nils

--
Nils Effenberger
UNIX-Administration

n at work Internet Informationssysteme GmbH Wandalenweg 5, 20097 Hamburg,
http://www.work.de E-Mail: effenberger at work.de, Tel: +49 40 2388090 -
Fax: +49 40 23880929

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