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FooDeas / raspberrypi-ua-netinst

RaspberryPi (minimal) unattended netinstaller
ISC License
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Use hostname provided by DHCP #156

Open mrichar1 opened 6 years ago

mrichar1 commented 6 years ago

Hi,

I was wondering if it might be possible to have the option to use a hostname provided by DHCP if one is provided, rather than having to hard-code it?

I've had a look at udhcpc and it seems to set the variable $hostname if one is provided by DHCP, which can then be used via the default.script it calls. If there was some way to flag to the installer to use this variable, that would be great!

Happy to dig into the code and see how feasible this is if you think it's a good idea?

kpfleming commented 6 years ago

Certainly seems like a reasonable thing to do, behind an opt-in configuration variable.

mrichar1 commented 6 years ago

So having dug a bit more there are actually quite a few variables which are offered by DHCP which might be useful to use to dynamically override those in installer-config.txt, including (but possibly not limited to):

( https://github.com/jgunthorpe/busybox/blob/master/networking/udhcp/README.udhcpc)

I'm now wondering if instead of a specific setting for each one, it might be better to have an option that takes a list of variables to source from DHCP? Something like:

dhcp_options=hostname,domain,timeserver

And then have a mapping of dhcp options to netinst options to override.