Post Reply 
 
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
iPXE get custom dhcp option (option nisplus-domain string)
2012-09-17, 14:19
Post: #1
iPXE get custom dhcp option (option nisplus-domain string)
Hi!

Is it possible to get out a custom dhcp option "option nisplus-domain string" from within iPXE?

Or easily done by adding to source and build from source?
Dont know how all this is tied together...

Regards,
Torgeir
Find all posts by this user
Quote this message in a reply
2012-09-17, 16:00
Post: #2
RE: iPXE get custom dhcp option (option nisplus-domain string)
(2012-09-17 14:19)Torgeir Wrote:  Is it possible to get out a custom dhcp option "option nisplus-domain string" from within iPXE?

You should be able to access the NIS+ domain using:

Code:
echo ${64:string}

You'll need to force your DHCP server to hand out this option even though iPXE doesn't request it. With ISC dhcpd, you can do this using something like:

Code:
append dhcp-parameter-request-list 64;

in /etc/dhcpd.conf.

Michael
Visit this user's website Find all posts by this user
Quote this message in a reply
2012-09-17, 16:11 (This post was last modified: 2012-09-17 16:44 by Torgeir.)
Post: #3
RE: iPXE get custom dhcp option (option nisplus-domain string)
Cool, thanks Smile

I know.

Here we have used the NIS+ domain string for something that would be useful for us to get out in a iPXE boot environment.

Torgeir
Find all posts by this user
Quote this message in a reply
2012-09-17, 16:14
Post: #4
RE: iPXE get custom dhcp option (option nisplus-domain string)
(2012-09-17 16:11)Torgeir Wrote:  But here we have used the NIS+ string for something that would be cool to be able to get out in iPXE.

I don't understand what you're saying, sorry.

You can access the DHCP option via ${64:string}, and embed that in whatever command you like. If you want to use it as a web server address, for example, you can do something like

Code:
kernel http://${64:string}/boot.ipxe

What are you trying to do with the NIS+ server option, and what is the problem you are having?

Michael
Visit this user's website Find all posts by this user
Quote this message in a reply
2012-09-17, 16:39 (This post was last modified: 2012-09-17 16:43 by Torgeir.)
Post: #5
RE: iPXE get custom dhcp option (option nisplus-domain string)
It worked! Smile

Added to (dhcpd.conf)
append dhcp-parameter-request-list 64;

inside my scope
option nisplus-domain "somehing_useful";

Torgeir
(2012-09-17 16:14)mcb30 Wrote:  
(2012-09-17 16:11)Torgeir Wrote:  But here we have used the NIS+ string for something that would be cool to be able to get out in iPXE.

I don't understand what you're saying, sorry.

You can access the DHCP option via ${64:string}, and embed that in whatever command you like. If you want to use it as a web server address, for example, you can do something like

Code:
kernel http://${64:string}/boot.ipxe

What are you trying to do with the NIS+ server option, and what is the problem you are having?

Michael

Sorry! I was unclear.

We have a string inside the "option nisplus-domain string" that we want to add to our kickstart installer (as boot argument). So we can pick it up with cat /proc/cmdline, and then use that information by our post/pre kickstart scripts.

Torgeir
Find all posts by this user
Quote this message in a reply
Post Reply 




User(s) browsing this thread: 1 Guest(s)