Bug#319524: please allow DHCP server to specify default archive mirror

[stappers@stappers.nl (Geert Stappers)]

On Sat, Jul 23, 2005 at 03:15:12PM -0400, Joey Hess wrote:
> 
> I've wanted for a while a way to let dhcp servers broadcast a preseed
> file (either content or url). If you can point me at a way to make a
> dhcp server do that and show me what it looks like to a dhcp client,
> then the rest of the peices should be very easy to put together.


My idea is based on having seen

| if substring (option vendor-class-identifier, 0, 9) = "PXEClient" {
|         filename "/eb-ROM-image.lzpxe";
| } else if substring (option vendor-class-identifier, 0, 9) = "Etherboot"
| {
|         filename "/kernel.img";
| }

in a DHCP _server_ configuration file.

I still haven't found time to dive into netcfg to find out which
vendor-class-identifier is emits (broadcasts).

When netcfg in d-i includes "inStaller" as vendor-class-identifier,
then can at DHCP server side the configuration contain:

| if substring (option vendor-class-identifier, 0, 9) = "PXEClient" {
|         filename "/eb-ROM-image.lzpxe";
| } else if substring (option vendor-class-identifier, 0, 9) = "Etherboot"
| {
|         filename "/kernel.img";
| } else if substring (option vendor-class-identifier, 0, 9) = "inStaller"
| {
|         filename "http://webserver.domain.tld/path/to/preseed.cfg";;
| }


The string "http://webserver.domain.tld/path/to/preseed.cfg"; is an URL
that is understood by `wget`.



Cheers
Geert Stappers