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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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