[ovirt-users] Network Interface order changed after reboot

[Edward Haas]

On Sun, Jun 26, 2016 at 4:48 PM, <ovirt at timmi.org> wrote:

> Hi Edy,
>
> please find some config files below. I did the interface config only
> through the oVirt GUI.
>
> I mean by reordering that after every reboot some interfaces are not the
> same as before. That means I need to change the cables after reboot.
>

This sounds like the problem Didi referenced to.

Before you configured the interfaces through oVirt, wasn't there any ifcfg
files?
(just to understand why you have not seen this before, without vdsm on the
host)


>
> [root at lxedna ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
> # Generated by VDSM version 4.17.28-1.el7
> DEVICE=eth0
> ONBOOT=yes
> BOOTPROTO=dhcp
> MTU=1500
> DEFROUTE=yes
> NM_CONTROLLED=no
> IPV6INIT=no
> [root at lxedna ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth1
> # Generated by VDSM version 4.17.23-0.el7.centos
> DEVICE=eth1
> BRIDGE=Test-LAN-SW1
> ONBOOT=yes
> MTU=1500
> NM_CONTROLLED=no
> IPV6INIT=no
> [root at lxedna ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth2
> # Generated by VDSM version 4.17.23-0.el7.centos
> DEVICE=eth2
> BRIDGE=PC-LAN
> ONBOOT=yes
> MTU=1500
> NM_CONTROLLED=no
> IPV6INIT=no
>
> Best regards
> Christoph
>
>
> Am 26.06.2016 um 14:51 schrieb Edward Haas:
>
>
>
> On Thu, Jun 23, 2016 at 3:49 PM, <ovirt at timmi.org> wrote:
>
>> Hi List,
>>
>> I have two nodes (running CentOS 7) and the network interface order
>> changed for some interfaces after every reboot.
>>
>> The configurations are done through the oVirt GUI. So the ifcfg-ethX
>> scripts are configured automatically by VDSM.
>>
>> Is there any option to get this configured to be stable?
>>
>> Best regards and thank you
>>
>> Christoph
>>
>> _______________________________________________
>> Users mailing list
>> Users at ovirt.org
>> http://lists.ovirt.org/mailman/listinfo/users
>>
>
> Hi Christoph,
>
> VDSM indeed edits and takes ownership of the interfaces for the networks
> it manages.
> However, editing the ifcfg files should not change anything in the order
> of the devices, unless it was originally set
> in an unsupported fashion. An ifcfg file is bound to a specific device
> name and I'm not familiar to device names
> floating around randomly.
> Perhaps you should elaborate more on what it means by 'order changed'.
>
> Here is an example of a setup we do not support (pre adding the host to
> Engine):
> The initial ifcfg file name: ifcfg-eth0
> The initial ifcfg file content: DEVICE="eth1"
> In this configuration, the name of the ifcfg file is inconsistent with the
> name of the device it represents.
> VDSM expects them to me in sync.
>
> Please provide the ifcfg files before and after you add the host to Engine.
>
> Thanks,
> Edy.
>
>
>
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