On Wed, 2011-04-06 at 22:24 -0700, Steven J. Yellin wrote:
> I don't know if doing something in a %pre script is appropriate for 
> your situation, but even if it is, "chmod a-w /etc/resolv.conf" might not 
> prevent NetworkManager from changing the file.  I believe NetworkManager 
> runs as root, and if as root you try such a chmod command on a file, 
> you'll find that root has no problem changing the file.  But root doing 
> "chattr +i /etc/resolv.conf" should protect resolv.conf.  After that 
> chattr command even root can't change resolv.conf without first doing 
> "chattr -i /etc/resolv.conf".
> 
> Steven Yellin
> 
> On Thu, 7 Apr 2011, Ahmed El Zein wrote:
> 
> > Nico,
> > Thanks for that. I don't have NetworkManger installed in by base system.
> > My problem is how do I stop NetworkManger running during the anaconda
> > install process while kickstarting? From what I can gather everything
> > works fine until it starts. one it starts it ruins the /etc/resolv.conf
> > file and all my %post scripts fail.
> >
> > can I do something in a %pre script that will prevent NetworkManger from
> > editing anything. maybe a "chmod a-w /etc/resolv.conf"?
> >
> > Thanks,
> > Ahmed

It looks like this is a RHEL6 bug.
https://bugzilla.redhat.com/show_bug.cgi?id=637193

Thanks,
Ahmed