[CentOS-virt] KVM, VLAN and Bridges and bonding

Sat Mar 3 03:22:38 UTC 2012
Rajagopal Swaminathan <raju.rajsand at gmail.com>

Greetings,

On Fri, Mar 2, 2012 at 7:22 PM, Baptiste AGASSE
<baptiste.agasse at lyra-network.com> wrote:
> Hi all,
>
> I use CentOS5.x + Xen in production for virtualization. I use it with bridged vlan networks and bonding (active-backup) like that:
>
> eth0  eth1
>  |     |
>  -------
>    |
>  bond0-------bond0.10---------bond0.12 ...
>    |            |                |
>    |         vlanbr10         vlanbr12
>  dom0           |                |
>           -------------     --------------
>           |     |     |     |     |      |  ...
>         domU1 domU2 domU3 domU4 domU5  domU6
>
> For future hypervisors, i want to implement the same things with CentOS6.x + KVM. In test env i've setup CentOS6.2 + KVM (with last updates) with the same network config, but guest lose network connection very often, and i don't know why.
>
> Network config:
>
> /etc/sysconfig/network-scripts/ifcfg-bond0.6:
> DEVICE=bond0.6
> BRIDGE=vlanbr6
> ONBOOT=yes
> BOOTPROTO=none
> VLAN=yes
> TYPE=Ethernet
>
> /etc/sysconfig/network-scripts/ifcfg-vlanbr6:
> DEVICE=vlanbr6
> TYPE=Bridge
> ONBOOT=yes
> BOOTPROTO=none
> DELAY=0
>
> I've installed guest like that (with a lot of retry because of network loss during installation)
>
> virt-install --name=guest02-c6 --disk path=/var/lib/libvirt/images/guest02-c6.img,size=10,sparse=false --graphics=spice,keymap=fr --vcpus=2 --ram=2048 --location=http://spacewalk.example.com/pub/dist/centos/6/x86_64/ --extra-args="ks=http://spacewalk.example.com/pub/ks/el6/guest02.el6.cfg ip=192.168.2.12 netmask=255.255.255.224 gateway=192.168.2.10 dns=192.168.2.10" --os-type=linux --os-variant=rhel6 --network=bridge:vlanbr6,model=virtio
>
> Someone have setup similar environment ?
>
> Regards.
>
> Baptiste.


Have you tried Digimer's stuff:

https://alteeve.com/w/2-Node_Red_Hat_KVM_Cluster_Tutorial

Maybe that will give you some pointers

HTH


-- 
Regards,

Rajagopal