virt-manager - bridged networking with unpriviledged user?

[Emre Erenoglu <erenoglu@xxxxxxxxx>]

Hi,

I'm trying to use virt-manager with my account instead of
raising its privilate to root level when asked by PolicyKit. Everything
works OK, except the bridged networking part.

I would like to
setup bridged networking without needing root privilate. For this, a
service script creates tap interfaces from virtual0 up to virtualN at
system bootup, all owned by group "kvm",  and all bridged to bridge
interface bridge0. Bridge0, as you might expect, also contains the
physical ethernet interface, which is eth0. Thus, everything is ready,
a guest process having kvm group membership just needs to bind itself
to one of those virtualX interfaces. Here's an example output of brctl
show :

bridge name     bridge id               STP enabled     interfaces
bridge0         8000.0018f39d6efc       no              eth0

                                                        virtual0
                                                        virtual1
                                                        virtual2

A typical qemu line, with manual MAC address assignment and virtio support would contain the following network related options to enable this way of working:

-net nic,vlan=0,macaddr=ee:ee:ee:ee:ee:10,model=virtio -net tap,vlan=0,ifname=virtual1,script=no,downscript=no

This way, qemu-kvm launches, opens the virtual1 interface and assigns it to the guest. virtual1 is already bridged to the physical interface, thus everything runs OK.  

 How can I accomplish this with virt-manager? Would it be possible by hand-manipulating the XML config file? Would it be worth adding to virt-manager?

Thanks beforehand for any comment,

Emre

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