Clone / New VM from Template changing network interfaces

Friday, 5 February 2016

oVirt Engine Version: 3.5.0.1-1.el6

When cloning or creating a new vm, the network interfaces in
/etc/udev/rules.d/70-persistent-net.rules is getting changed - rendering
the new new VM un-networkable.

The original file looks like this:

# PCI device 0x1af4:/sys/devices/pci0000:00/0000:00:04.0/virtio1
(virtio-pci)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*",
ATTR(address)=="00:01:a4:a2:b4:04", ATTR(dev_id)=="0x0",
ATTR(type)=="1",
KERNEL=="eth*", NAME="eth1"

# PCI device 0x1af4:/sys/devices/pci0000:00/0000:00:03.0/virtio0
(virtio-pci)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*",
ATTR(address)=="00:01:a4:a2:b4:03", ATTR(dev_id)=="0x0",
ATTR(type)=="1",
KERNEL=="eth*", NAME="eth0"

# PCI device 0x1af4:/sys/devices/pci0000:00/0000:00:05.0/virtio2
(virtio-pci)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*",
ATTR(address)=="00:01:a4:a2:b4:05", ATTR(dev_id)=="0x0",
ATTR(type)=="1",
KERNEL=="eth*", NAME="eth2"

However, once the VM is either cloned or a new VM created from a template
of this source VM, the file looks like this:

# PCI device 0x1af4:/sys/devices/pci0000:00/0000:00:04.0/virtio1
(virtio-pci)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*",
ATTR(address)=="00:01:a4:a2:b4:04", ATTR(dev_id)=="0x0",
ATTR(type)=="1",
KERNEL=="eth*", NAME="eth1"

# PCI device 0x1af4:/sys/devices/pci0000:00/0000:00:03.0/virtio0
(virtio-pci)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*",
ATTR(address)=="00:01:a4:a2:b4:03", ATTR(dev_id)=="0x0",
ATTR(type)=="1",
KERNEL=="eth*", NAME="eth0"

# PCI device 0x1af4:/sys/devices/pci0000:00/0000:00:05.0/virtio2
(virtio-pci)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*",
ATTR(address)=="00:01:a4:a2:b4:05", ATTR(dev_id)=="0x0",
ATTR(type)=="1",
KERNEL=="eth*", NAME="eth2"

# PCI device 0x1af4:/sys/devices/pci0000:00/0000:00:04.0/virtio1
(virtio-pci)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*",
ATTR(address)=="00:01:a4:a2:b4:10", ATTR(dev_id)=="0x0",
ATTR(type)=="1",
KERNEL=="eth*", NAME="eth3"

# PCI device 0x1af4:/sys/devices/pci0000:00/0000:00:03.0/virtio1
(virtio-pci)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*",
ATTR(address)=="00:01:a4:a2:b4:0f", ATTR(dev_id)=="0x0",
ATTR(type)=="1",
KERNEL=="eth*", NAME="eth5"

The 'correct' interfaces are still there, but out of sequence and there are
two additional interfaces that do not belong there.

Ovirt admin console is showing the correct number of interfaces as seen in
this image:

[image: Inline image 3]

***
*Mark Steele*
CIO / VP Technical Operations | TelVue Corporation
TelVue - We Share Your Vision
800.885.8886 x128 | msteele(a)telvue.com | http://www.telvue.com
twitter: http://twitter.com/telvue | facebook:
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