virsh and libvirtd

[gary artim]

what confuses is that the .XML examples have ipaddresses and the guest has
definitions and the host has definitions. so if you define a fix IP in the
lirtlib .XML should your guest define the same address? would you say the
.XML is the glue between the host and guest and must match? I think the
libvirt examples lack the whole picture, but maybe its just me. I suppose
if the thing just worked I would have cared less and never strived to
understand. I do feel the libvirt doc is well done, maybe i just have holes
in my understanding that would clear this up. gary
On Sep 7, 2012 12:12 AM, "Mateusz Marzantowicz" <mmarzantowicz at osdf.com.pl>
wrote:

> On 07.09.2012 06:02, gary artim wrote:
> > I have a fedora system configured and running with virsh using
> > kvm/qemu. All I want is to have a fixed ipaddress for that virtual
> > machine. I know that there is the Host and Guest sides to the network.
> > The host has virbr0 interface, which i guess is a bridge. Seem when
> > ever I define a interface to the guest with a type=routed it hoses my
> > other interfaces on the host and requires a console reboot --
> > completely hanging the network. I'm no networking expert, but there
> > must be a simple N step procedure for defining a static IPaddress to
> > route to a guest machine? Has anyone got this working and have a
> > procedure. My network has 2 nic, eth0 and eth1 (10.0.0.253 and
> > 10.0.1.253), one nic has a route to an nfs machine, the other passes
> > through a linux based router to the wan. I can alias the 10.0.1.253
> > (eth0) to another address in the subnet, like 10.0.1.251 (eth0:0)  and
> > would like to use it in some way to connect to the guest -- I have the
> > nat/routing working fine from the router to eth0:0. The network for
> > libvirt is confusing. It not obvious which side (guest or host) your
> > defining and seem to keep multiple definitions around, even after a
> > restart of libvirtd.service. An help would be great!
>
> Sorry for replying with a link, but please read instructions at:
>
> [1] http://www.linux-kvm.org/page/Networking
> [2]
>
> http://fedoraproject.org/wiki/Getting_started_with_virtualization#Networking_Support
> [3] http://wiki.libvirt.org/page/Networking
>
> I assume that you're interested in "public bridge" scenario, that is
> your guest can connect to the network and other hosts can reach the
> guest host. You also want to have static IP assigned to your guest OS.
> Solution is that you configure your bridge networking according to
> instructions in 1, 2, 3 and then set up static IP addresses on network
> interfaces inside your guests. It's up to guest host how (static vs
> dynamic) its network interfaces are configured.
>
>
> Mateusz Marzantowicz
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