scenario:
i run a mix of libvirt 1.1.1 and 1.2.2 on the source hosts, 1.2.2 on the
destination hosts
qemu: 1.5.0+dfsg-3ubuntu5.3~cloud0 on all the hosts
openstack havana and icehouse
description:
i have many compute nodes running libvirt+kvm, when i try to migrate
guest that were created months ago it fails, if i create a vm and then
migrate it works
the problem is that libvirt cannot retrieve the mtu of the bridge were
the interfaces are be attached, but bridge is there (up and running)
$ grep qbr32740ab3-b6 /var/log/libvirt/libvirtd.log
2014-11-05 08:44:53.013+0000: 35311: debug : udevGetDeviceProperty:121 :
udev reports device 'qbr32740ab3-b6' does not have property 'DRIVER'
2014-11-05 08:44:53.013+0000: 35311: debug : udevGetDeviceType:1217 :
Could not determine device type for device with sysfs name 'qbr32740ab3-b6'
2014-11-05 08:44:53.013+0000: 35311: debug : udevAddOneDevice:1392 :
Discarding device -1 0x7f36e80bd5c0 /sys/devices/virtual/net/qbr32740ab3-b6
2014-11-05 08:44:53.013+0000: 35311: debug :
udevProcessDeviceListEntry:1414 : Failed to create node device for udev
device '/sys/devices/virtual/net/qbr32740ab3-b6'
2014-11-05 08:45:08.458+0000: 35303: error :
virNetClientProgramDispatchError:175 : Cannot get interface MTU on
'qbr32740ab3-b6': No such device
# ip l show dev qbr32740ab3-b6
639: qbr32740ab3-b6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc
noqueue state UP
link/ether 72:d5:db:f6:b5:30 brd ff:ff:ff:ff:ff:ff
# brctl show qbr32740ab3-b6
bridge name bridge id STP enabled interfaces
qbr32740ab3-b6 8000.72d5dbf6b530 no qvb32740ab3-b6
tap32740ab3-b6
the difference between a new defined domain and an old one
is this
< <alias name='pci0'/>
---
> <alias name='pci.0'/>
> <timer name='hpet' present='no'/> ---> old domain does not have it
i even tried patching src/util/virnetdev.c to remove the check and
always return 1500 but the same thing happens
i'm lost i don't know where to look at it, any clue were to look is
appreciated
--
1AE0 322E B8F7 4717 BDEA BF1D 44BB 1BA7 9F6C 6333
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