Re: [PATCH] make kvm service script transfer dhclient settings correctly

["Daniel P. Berrange" <berrange-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>]

On Sun, Sep 16, 2007 at 11:52:56AM +0200, Avi Kivity wrote:
> Ferry Huberts wrote:
> > Avi Kivity wrote:
> >> Ferry Huberts wrote:
> >>
> >>
> >> I really recommend against using the kvm initscript... it is fragile 
> >> is broken.  On Fedora, you can use the standard initscripts (well, 
> >> they are fragile and broken too, but they are more complete than the 
> >> kvm initscript):

I entirely agree with your recommendation against using the kvm initscript.
We don't include in the Fedora KVM rpms, and the equivalent script shipped
with Xen has inflicted untold misery & bug report chaos. Using the distro
specific initscripts for setting up bridges is a much more predictable and
reliable approach.

> >>
> >> [avi@blast ~]$ cat /etc/sysconfig/network-scripts/ifcfg-sw0
> >> DEVICE=sw0
> >> BOOTPROTO=dhcp
> >> HWADDR=00:0F:EA:6E:1E:F0
> >> ONBOOT=yes
> >> TYPE=Bridge
> >> DHCP_HOSTNAME=blast
> >>
> >> [avi@blast ~]$ cat /etc/sysconfig/network-scripts/ifcfg-eth0
> >> DEVICE=eth0
> >> BRIDGE=sw0
> >> HWADDR=00:0F:EA:6E:1E:F0
> >> ONBOOT=yes
> >> TYPE=Ethernet
> >>
> >>
> >> This setup starts dhcp directly on the bridge, without the need to 
> >> move things around.  See especially the 'TYPE=Bridge' and 
> >> 'BRIDGE=sw0' statements.

This is similar to the way we document bridge setup in Fedora, although
for the sake of consistent nomenculture with Xen, we have peth0 being the 
physical device & eth0 being the bridge device. Either way its just naming,
the end result is functionally the same.

Libvirt also provides a 'virtual network' which is an isolated bridge
device, connected to the physical devices using NAT as our 'out of the box'
connectivity.

There's a short blog post with recommendations for KVM networking on Fedora

http://watzmann.net/blog/index.php/2007/04/27/networking_with_kvm_and_libvirt

> I'll remove the script unless anyone sees an objection?

Gets my vote.

Regards,
Dan.
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