Comments inline. Salvatore
On 25 March 2014 07:03, Ageeleshwar Kandavelu < ageeleshwar.kandav...@csscorp.com> wrote: > Hi, > > I have two queries regarding neutron ovs agent. > > 1. Correct me if I am wrong the ovs agent polls the neutron database for > changes before creating resources. Why does the agent have to register with > neutron-server. When I give 'neutron agent-list' I can see all the agents > (l3, dhcp, ovs-plugin). What is the communication interface between the > neutron-server and the agents. A link to the documentation would do. > The latest version of the neutron agent which had direct access to the database was Essex. Since Folsom, there is a RPC interface, which is the one the agent uses to report the state you see with neutron agent-list. Also, the agent configures iptables rules for implementing security groups, and creates gre tunnels if you're using this transport mode; it does not create however tap interfaces, but merely wires them to the appropriate network. > 2. I recon that the ovs agent is using subprocess to create interfaces on > openvswitch. What api does it use to handling namespaces i.e., to create > interfaces inside non default network namespace. > As stated earlier the OVS agent does not create interface. Other agents, such as DHCP and L3, do that. This, and ns management, is achieved with a purpose built library: neutron.agent.linux.ip_lib > > Thank you, > Ageeleshwar K > http://www.csscorp.com/common/email-disclaimer.php > > _______________________________________________ > Mailing list: > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > Post to : openstack@lists.openstack.org > Unsubscribe : > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > >
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