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

[Alexandre DERUMIER]

some interesting infos on libvirt network config:

http://libvirt.org/formatnetwork.html

They seem to always use a bridge (also for nat/routed), with an ip address.

So, I think the dhcp server listen on the bridge ip.

For nat, I think the nat is done on the bridge ip.
For routed, I think that the gateway of the vm is the bridge ip.




bridge
------
      <network>
        <name>private</name>
        <bridge name="virbr2" />
        <ip address="192.168.152.1" netmask="255.255.255.0">
          <dhcp>
            <range start="192.168.152.2" end="192.168.152.254" />
            <host mac='52:54:00:e8:dc:ee' name='aaa.example.com' ip='192.168.4.32' />
            <host mac='52:54:00:22:6c:5c' name='bbb.example.com' ip='192.168.4.33' />
          </dhcp>
        </ip>
        <ip family="ipv6" address="2001:db8:ca2:3::1" prefix="64" />
      </network>

Nat
---
    <network>
        <name>default</name>
        <bridge name="virbr0" />
        <forward mode="nat"/>
        <ip address="192.168.122.1" netmask="255.255.255.0">
          <dhcp>
            <range start="192.168.122.2" end="192.168.122.254" />
          </dhcp>
        </ip>
        <ip family="ipv6" address="2001:db8:ca2:2::1" prefix="64" />
      </network>

Routed
-------
      <network>
        <name>local</name>
        <bridge name="virbr1" />
        <forward mode="route" dev="eth1"/>
        <ip address="192.168.122.1" netmask="255.255.255.0">
          <dhcp>
            <range start="192.168.122.2" end="192.168.122.254" />
          </dhcp>
        </ip>
        <ip family="ipv6" address="2001:db8:ca2:2::1" prefix="64" />
      </network>

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

De: "Alexandre DERUMIER" <aderumier at odiso.com> 
À: "Dietmar Maurer" <dietmar at proxmox.com> 
Cc: pve-devel at pve.proxmox.com 
Envoyé: Mardi 21 Mai 2013 11:20:03 
Objet: Re: [pve-devel] implementation of a dhcp service in proxmox ? 

>>Maybe we need to use the --dhcp-host= option instead? 

I think this is to assign specific ip to specific mac address. 

About that, does users need to assign dynamic ip from a range ? 
Or simply specify 1 ip manually by nic is enough ? 

(I don't known, because for my usage, I only need to assign manually my ips for each nic) 


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

De: "Dietmar Maurer" <dietmar at proxmox.com> 
À: "Alexandre DERUMIER" <aderumier at odiso.com>, "Michael Rasmussen" <mir at datanom.net> 
Cc: pve-devel at pve.proxmox.com 
Envoyé: Mardi 21 Mai 2013 10:41:47 
Objet: RE: [pve-devel] implementation of a dhcp service in proxmox ? 

> >>a dnsmasq daemon can handle several netdevices and several networks so 
> >>there should be no need for more than one daemon. 
> 
> But how can we tell which ip range is assigned to which device (tap/bridge) ? 
> 
> I have read that the syntax: 
> --dhcp-range=<device>,xxxx is not more used since dnsmasq 2.63 

Maybe we need to use the --dhcp-host= option instead? 
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