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Thanks Vish,

This is something I always forget to ask: I'm curious about the historical
reasons for dnsmasq instead of ISC-DHCP managed with OMAPI, for example.

Cheers
Diego

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Diego Parrilla
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*www.stackops.com | * diego.parrilla at stackops.com** | +34 649 94 43 29 |
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* <http://www.stackops.com/>
*

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On Tue, Feb 19, 2013 at 8:37 PM, Vishvananda Ishaya
<vishvananda at gmail.com>wrote:

> You cannot have an external dhcp server with openstack. Openstack needs a
> way to know the ip address assigned to a vm to do its listing properly. If
> you don't care about the api returning valid ips there is a possibility of
> using FlatNetworking (not FlatDHCP) to make nova stick the network into a
> bridge and not do any dhcp at all. You could then have an external server
> serving up dhcp ips. I suspect you will probably have to disable security
> groups completely using NoopFirewallDriver driver to get this to work.
>
> As to the reason dhcp-host is not working, I suspect is because we give
> dnsmasq an external hosts file so you probably would need the host
> directive there.
>
> Vish
>
> On Feb 19, 2013, at 4:44 AM, Ritesh Nanda <riteshnanda09 at gmail.com> wrote:
>
> Hope Vish can answer this , what can be the way around to do this.
>
> On Tue, Feb 19, 2013 at 2:01 PM, Razique Mahroua <
> razique.mahroua at gmail.com> wrote:
>
>> Hi,
>> I'm not sure the "dhcp-host" configuration option exists actually. As for
>> having one another host in VLAN mode is something I'd be interested to know
>> as well
>>
>> Regards,
>>
>> *Razique Mahroua** - **Nuage & Co*
>> razique.mahroua at gmail.com
>> Tel : +33 9 72 37 94 15
>>
>> <NUAGECO-LOGO-Fblan_petit.jpg>
>>
>> Le 19 févr. 2013 à 08:05, Ritesh Nanda <riteshnanda09 at gmail.com> a écrit
>> :
>>
>> Hello ,
>>
>> Is it possible to use external dhcp server , instead of dnsmasq .
>> I am using openstack essex, with vlan manager as network,  I have a need
>> where i need to implement dynamic dns,
>> so using dhcp3 as dhcp-server and bind9 as dns is possible.
>>
>> Or is there any way in openstack i can implement dynamic dns in openstack.
>>
>> One more problem which i am facing , dnsmasq has a option to assign
>> static ip to a particular hostname using dhcp-host
>> parameter in dnsmasq config file.
>>
>> i tried it doing by defining  the config file of dnsmasq in nova.conf
>>
>> --dnsmasq_config_file=/etc/nova/dnsmasq.conf
>>
>> then in dnsmasq config file
>>
>> i gave options for a particular subnet.
>>
>>
>> dhcp-range=Tenant-operator,10.0.50.3,10.0.50.254,255.255.255.0,24h
>> dhcp-option=Tenant-operator,6,10.0.50.7
>> domain=operator.com,10.0.50.0/24,local
>> dhcp-host=importantmachine,10.0.50.120
>>
>> these all options are working except dhcp-host.
>>
>> Can anybody help me with this.
>> --
>> * With Regards
>> *
>> * Ritesh Nanda
>> *
>>
>> ***
>> *
>> <http://www.ericsson.com/>
>>
>>
>> _______________________________________________
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>>
>>
>
>
> --
> * With Regards
> *
> * Ritesh Nanda
> *
>
> ***
> *
> <http://www.ericsson.com/>
>
>
> _______________________________________________
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>
>
> _______________________________________________
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