[klibc] ipconfig - single option for specifying hostname

[Phil Lello]

Many thanks for that - I'd overlooked the need to refresh leases, so will
look at changes elsewhere in the system.

Phil

On Fri, Aug 7, 2015 at 10:14 PM, H. Peter Anvin <hpa at zytor.com> wrote:

> On 07/13/2015 12:03 AM, Phil Lello wrote:
> > Hi all,
> >
> > I've recently been experimenting with Xen VMs booted using DHCP/NFS, and
> > that's looking good.
> >
> > One nuisance is that I'm unable to get the DNS to update on the server
> > since there's no hostname in the DHCP request packet.
> >
> > I'm aware that I can specify a hostname using the long-format device
> > name, but this doesn't seem to play well with initramfs. So, I'd like to
> > add a patch to ipconfig that allows a parameter to specify the hostname.
> > Are there any immediate objections to this, or reasons why this wouldn't
> > be accepted?
> >
> > Alternatively, it may be that the correct approach would be to leave
> > ipconfig alone, and add a minimal nsupdate to klibc so that the hostname
> > can be read out of root/etc/hostname later in the pre-boot, then passed
> > on to DNS. Thoughts on the relative merrits of the two approaches
> welcomed.
> >
> > Finally, and sorry for asking a 'howto' question, are there any pointers
> > on getting klibc to duild on Ubuntu? I'm being frustrated by location of
> > kernel headers, and don't want to go adding symlinks from /usr/src.
> >
>
> Typically you would execute a secondary DHCP request to make that
> happen.  You *have* to do that anyway, because ipconfig will not renew a
> lease.
>
>         -hpa
>
>
>
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