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[Trinath Somanchi <trinath.somanchi@xxxxxxxxx>]

Hi-

Thanks for the reply. I still have some more doubts ... please find then
inline.

Kindly help me understand these...


On Tue, Dec 11, 2012 at 2:59 PM, Gary Kotton <gkotton@xxxxxxxxxx> wrote:

>  On 12/11/2012 09:50 AM, Trinath Somanchi wrote:
>
> Hi-
>
>  I have the following first set of doubts regarding the Folsom Quantum
>
>  [1] With regard of Quantum Plug-in, How does the RPC communication take
> place between the Agent and the plug-n ? In the source code,
> ovs_quantum_plugin.py, I find the setup_rpc method and AgentRPCAPI class
> what does the reverse RPC tasks. Can any one guide me on understanding this.
>
>
> When the OVS detects that a new interface has been added it will query the
> plugin for the interface details. This will enable it to create the
> relevant networking for the specific interface, for example tags etc. The
> agent requests information from the plugin when it detects that there is a
> new resources.
> In addition to this there are cases when the plugin will notify the agent
> - for example if the admin status of a port has changed.
>
>
>
>  [2] What is the significance of the file quantum/db/dhcp_rpc_base.py?
> Many plugins in the quantum/plugins directory use the methods in the class.
>
>
> This enables the DHCP agent to request information from the plugin.
>
> Trinath>> But then dhcp-agent has to use this api. But why the plugins are
using this api? I see in the source code that, ryu, nec and ovs plugins use
this dhcp_rpc_base for redirected processing of data.


>
>  [3] With core_plugin configuration being in place, can we have some
> other plugin too existing in Quantum? Can any one guide me on how to
> achieve the same, like a Fake plugin?
>
>
> In V2 there is no fake plugin. There are a number of different plugins
> that make sue of the base DB plugin - for example the linuxbridge,
> openvswitch, NEC, RYU etc.
>
>
>
>  [4] Why OVS quantum Plug-in doesn't support create/update/delete of port
> and subnets?
>
>
> The OVS plugin inherits the base plugin. If it does not need to make any
> additions then it will use the base methods implementation. If you look at
> https://review.openstack.org/#/c/16210/ you will see that in some cases
> changes need to be made - for example extending the ports to support
> security groups.
>
>
>
>
>  Kindly help me understand these ...
>
>
> It is all pretty complicated. My suggestion would be to get a evstack
> installation up and running and playing around with the configurations and
> the agents. Once you start to understand how all of the components interact
> it will be easier to follow.
>
>
>  Thanks in advance
>
>
>
>  --
> Regards,
> ----------------------------------------------
> Trinath Somanchi,
> +91 9866 235 130
>
>
>
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-- 
Regards,
----------------------------------------------
Trinath Somanchi,
+91 9866 235 130