[pve-devel] implementation of a dhcp service in proxmox ?

Alexandre DERUMIER aderumier at odiso.com
Wed May 22 10:06:38 CEST 2013


I just tried both daemon, I can't get them work.

I receive the DHCPDISCOVERY from the guest, and DHCPOFFER is sent, but never reach the guest.

I have sniffed with dhcpdump tool, I don't see the DHCPOFFER packet on the bridge...I don't known on which interface is sent the packet...


test setup is :

auto vmbr2
iface vmbr2 inet static
        bridge_ports none
        bridge_stp off
        bridge_fd 0
        address 192.168.10.1
        netmask 255.255.255.0


with a vm plugged on vmbr2.

If the daemon listen to 192.168.10.1, I can't see the DHCPDISCOVERY packet.
I need to listen to 0.0.0.0.



----- Mail original ----- 

De: "Alexandre DERUMIER" <aderumier at odiso.com> 
À: "Dietmar Maurer" <dietmar at proxmox.com> 
Cc: pve-devel at pve.proxmox.com 
Envoyé: Mercredi 22 Mai 2013 09:23:07 
Objet: Re: [pve-devel] implementation of a dhcp service in proxmox ? 

>>The example daemon you sent has about 1000LOC - do we need that 
>>or would the simple version also work? 
>> 
>>http://cpansearch.perl.org/src/DJZORT/Net-DHCP-0.693/examples/dhcpd.pl 

To be honest I don't known, I'll try to play with cpan sample today. 
I'll also try to read the dhcp rfc to see what are the differents fields in dhcp packet response. 



----- Mail original ----- 

De: "Dietmar Maurer" <dietmar at proxmox.com> 
À: "Dietmar Maurer" <dietmar at proxmox.com>, "Alexandre DERUMIER" <aderumier at odiso.com> 
Cc: pve-devel at pve.proxmox.com 
Envoyé: Mercredi 22 Mai 2013 08:43:54 
Objet: RE: [pve-devel] implementation of a dhcp service in proxmox ? 



> -----Original Message----- 
> From: pve-devel-bounces at pve.proxmox.com [mailto:pve-devel- 
> bounces at pve.proxmox.com] On Behalf Of Dietmar Maurer 
> Sent: Mittwoch, 22. Mai 2013 08:34 
> To: Alexandre DERUMIER 
> Cc: pve-devel at pve.proxmox.com 
> Subject: Re: [pve-devel] implementation of a dhcp service in proxmox ? 
> 
> > So dnsmasq simply allocated range, depend of the source ip which 
> > receive the dhcp packets. 
> > 
> > So 1 dnsmasq daemon can do the job. 
> > Maybe command line will be too long with a lot of ranges and ip. 
> > Maybe can we generate the dnsmasq config file from proxmox 
> > configuration files before reload the dnsmasq deamon ? 
> 
> Besides, how will we handle leases on migration. When we implement our own 
> dhcp server with perl we can store them on /etc/pve. 
> 
> So maybe it is worth to evaluate Net::DHCP::Packet. 

The example daemon you sent has about 1000LOC - do we need that 
or would the simple version also work? 

http://cpansearch.perl.org/src/DJZORT/Net-DHCP-0.693/examples/dhcpd.pl 
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