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Gary,

Thanks.

That brings up the question why there are dnsmasq processes running on my controller node (which has neutron-server running) and
not on the networking node (neutron-dhcp-agent neutron-l3-agent neutron-metadata-agent neutron-openvswitch-agent).

Any suggestions?


Regards,

	Uwe

Am 12.06.2015 um 13:58 schrieb Gary Kotton:
> Hi,
> The DHCP agent runs the dnsmasq process. That is done on the network node.
> Thanks
> Gary
> 
> On 6/12/15, 2:35 PM, "Uwe Sauter" <uwe.sauter.de at gmail.com> wrote:
> 
>> Hi,
>>
>> == TL;DR ==
>> Which neutron service manages the DNSMASQ processes? Does this run on the
>> controller node or the networking node?
>>
>>
>> == Long story ==
>> I have a five node Juno installation (1 controller, 1 storage, 1 network
>> and 2 compute nodes).
>>
>> I followed the Juno Red Hat installation guide [1] up to the point where
>> the dashboard was installed, making modifications where
>> necessary to account for the additional nodes. I'm using Neutron / ML2 as
>> networking component with GRE tenant networks.
>>
>> I am able to sucessfully start a Cirros VM but that instance won't get an
>> IP address. To resolve this I followed a link [2] that
>> told to add logging to dnsmasq. Here the relevant parts on the *network*
>> node:
>>
>> /etc/neutron/dhcp_agent.ini
>> [DEFAULT]
>> interface_driver = neutron.agent.linux.interface.OVSInterfaceDriver
>> dhcp_driver = neutron.agent.linux.dhcp.Dnsmasq
>> use_namespaces = True
>> dhcp_delete_namespaces = True
>> verbose = True
>> dnsmasq_config_file = /etc/neutron/dnsmasq-neutron.conf
>>
>>
>> /etc/neutron/dnsmasq-neutron.conf
>> dhcp-option-force=26,1454
>> log-facility = /var/log/neutron/dnsmasq.log
>> log-dhcp
>>
>>
>> Then I realized that there were no dnsmasq processes on the networking
>> node but only on the controller node. Is this correct? I
>> was under the impression that neutron-dhcp-agent (running on the
>> networking node) is the service that maintains DHCP on the tenant
>> networks.
>>
>> So the question is:
>> Which service manages dnsmasq and on which node should that run on?
>>
>>
>> Thanks,
>>
>> 	Uwe
>>
>> [1] http://docs.openstack.org/juno/install-guide/install/yum/content/
>> [2] 
>> https://ask.openstack.org/en/question/63110/unable-to-get-dhcp-lease-in-ju
>> no/
>>
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