[CentOS-virt] Xen List

Thu Apr 17 20:27:33 UTC 2008
Ross S. W. Walker <rwalker at medallion.com>

Joseph L. Casale wrote:
> >What happens if you just remove the ifcfg file for this
> >interface? What does Xen do with it? What if you have an
> >ifcfg file, but setup no IP address on it?
> Bear with me Ross, my Linux skills are new :) Won't CentOS 
> create the ifcfg on the fly when it boots (I think thats what 
> happens, I may have tried and I wont have acess to the box 
> untill tonight). I will check into these points.

I don't think so. It creates these on installation, but
doesn't auto-gen them afterwards. NetworkManager may do
so, but you should disable NetworkManager with Xen or
bad things will happen.

I would just create an ifcfg with no IP address and that
should work.

> >Of course you can pass the NIC through to the PVM which
> >I suspect is what you are thinking of doing.
> Yup, so I hoped to make that work (I imagine its most 
> secure)! Somehting is wrong with the way I am blocking it, I 
> don't what though yet! I tried to compile from source to make 
> the menuconfig change and I cant make that work... Can you 
> set the pciback option in the srpm's build routine somehow? I 
> have no issues making the srpm.

There's no need for a custom kernel, all the CentOS Xen kernels
include pciback and pcifront support, and most other distros
pre-compiled Xen kernels do too.

> >There is shorewall which is in the repo. Or maybe smoothwall
> >can run inside a PVM?
> Thats good to know, I will check both out!

Just about any firewall package that installs as a service to
the distribution rather then a complete distribution on it's
own should work in a PVM.


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