Re: [libvirt-users] libvirt bridge configuration
Am Sunday 30 January 2011 schrieb Taras Lipatov:
Hi Every one,
I'm hoping some one can point me in the right direction.
We are piloting KVM + Libvirt for migrating off Xen and I'm stuck with
the network bridge configuration via libvirt.
What we have currently with xen is:
1 server with Wan/lan interfaces and a pool of public ip addresses.
Using xen bridge scripts I'd start a xenbr0 and attach eth0 (wan) and go
ahead and assign public IP's
to images attached to xenbr0.
Now with creating virbr0, I need to assign it an ip address? and routing
methods? what about creating a transparent bridge via libvirt?
I kno I can achieve this using bridge utils, but it would be nice to
have everything handled by libvirt.
As far as I can tell, libvirt just doesn't support the "plain old bridge"
scenario (i.e. the one where you enslave a physical ethernet device in the same
bridge as the virtual devices for the guests), at least not if you want to
define the network itself using libvirt.
Just create a new bridge device (say, br1) manually, make your OS create it
automatically on startup and then put something like this in the devices section
of your guests:
<interface type="bridge">
<source bridge="br1"/>
<model type='e1000'/>"
<mac address="<somemacaddress>">
</interface>
(Note: You will have to manuall keep track of the MAC addresses in use on your
network. If one is used twice, things will break down.)
Guido