Supported parameters in subnets.cfg?

[devilkin]

Hi,

I was wondering which parameters are supported in subnets.cfg?
I'd like to pass the search domain using DHCP, but I can't find out which parameter would correctly translate to dnsmasq.

 

[spirit]

I don't think that search domain is already send in dhcp options.
(the code is /usr/share/perl5/PVE/Network/SDN/Dhcp/Dnsmasq.pm)

But it should be defined at zone level (you have a dns suffix option). they are no dhcp options configurable in subnets.cfg currently.

 

[luckman212]

I came looking for the same. Currently the VMs attached to my Simple dhcpsnat zone do not receive a default search domain from dnsmasq. I would like to supply something like "lab01" or "internal" etc. Is it possible?

Seems like we should be able to hand-edit the config files at e.g. /etc/dnsmasq.d/dhcpnat/10-vnet0.conf but I am not sure what the exact syntax would be. I have tried e.g.

dhcp-range=set:dhcpnat-10.0.0.0-24,10.0.0.0,static,255.255.255.0,infinite
dhcp-option=tag:dhcpnat-10.0.0.0-24,option:router,10.0.0.1
interface=vnet0
domain=lab01
dhcp-option=tag:dhcpnat-10.0.0.0-24,option:domain-name,lab01
dhcp-option-force=tag:dhcpnat-10.0.0.0-24,option:domain-search,lab01

But it doesn't seem to work, yet...

 

[luckman212]

Ah actually it does work, I just was editing the files on the wrong node..... doh!

This is all that is needed (I saved it as /etc/dnsmasq.d/dhcpnat/searchdomain.conf on all nodes...)

dhcp-option=tag:dhcpnat-10.0.0.0-24,option:domain-name,lab01
dhcp-option=tag:dhcpnat-10.0.0.0-24,option:domain-search,lab01

After, reboot the node, or just bounce dnsmasq...

systemctl restart dnsmasq@dhcpnat

Would be wonderful to have knobs in the VNet GUI to configure this instead of having to manually set and deal with replicating it across the cluster...

 

[floh8]

Open an enhancement in bugzilla. Proxmox. Com!

 

[luckman212]

@floh8 I found a very similar request already, so I added this suggestion to it: https://bugzilla.proxmox.com/show_bug.cgi?id=6014#c1