I try and always install my new OpenBSD (i386 and amd64) machines using pxeboot.
I have the basic process down cold, but I am looking for a bit more
flexibility, hence these questions.
In my environment, I have a mix of i386 and amd64 machines, and it is
conceivable that I would want to install different versions of OpenBSD
on new installs.
On my dhcpd server, I might have something like this:
host obbamd42 {
hardware ethernet 00:e0:81:45:df:d4;
fixed-address 1.2.3.4;
filename "pxeboot-amd64-4.2";
}
If I take care to specify the correct filename here, dhcpd will return
the correct pxeboot file for the OS version and architecture of the
machine in questions, so far so good!
The question/problem is how can I specify a different bsd.rd file for
different installs?
The filename to be booted is obtained by requesting /etc/boot.conf
from the tftpd server, so if I could return a different boot.conf file
for different requests, I could change the
boot line to make sure the correct boot file is then requested.
On the tftp server, in /var/tftpboot, I have an etc directory,
containing a boot.conf file, which looks something like:
# cat boot.conf
set tty com0
stty com0 9600
boot bsd.rd
I'd like for the file to boot to vary depending on which machine is
asking. How can I do that?
One way I can imagine is to modify the pxeboot file to request
different boot.conf files,
for example,
pxeboot-amd64-4.2 requests /etc/boot-4.2-amd.conf
pxeboot-i386-4.1 requests /etc/boot-4.1-i386.conf
etc. Or, maybe even more flexibly, the pxeboot program would
determine the MAC address of the machine on which it is running, and
request a specific boot.conf file, eg
/etc/boot-00e08145dfd4.conf
And ideally, if it couldn't find a file like this on the tftpd server,
it would then just request the normal boot.conf file (to preserve
existing behavior)
I've begun looking through the source code for pxeboot, and I haven't
yet found where it requests the boot.conf file.
Can anyone out there point me to the right file in the source tree to
do what I want?
Or, I am always open to other ideas as to how I can accomplish my goals here.
If there were a "cgi" option to tftpd where one could compute the
response to a request dynamically, that would be another way to go.
I'd appreciate any tips/pointers/advice.
Best regards,
Don
