openstack/neutron-dynamic-routing
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Merge "Add neutron-dynamic-routing DrAgent & Scheduler document"

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doc/source/design/agent-scheduler.rst
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''''''' Heading 4
(Avoid deeper levels because they do not render well.)
Agent & Scheduler
=================
Agent
=====
TODO: Coming Soon
Neutron-dynamic-routing implements a new agent named "DRAgent". The agent talks
to the neutron-dynamic-routing plugin which resides in the neutron server to get
routing entity configuration. DRAgent interacts with the back-end driver to
realize the required dynamic routing protocol functionality. For details,
please refer to the system design document :doc:`system-design`
.. note::
One DRAgent can support multiple drivers but currently ONLY Ryu is
integrated successfully.
Scheduler
=========
Neutron-dynamic-routing scheduler, schedules a routing entity to a proper DRAgent.
BGP Scheduler
-------------
BGP Speaker and DRAgent has 1:N association which means one BGP speaker can be
scheduled on multiple DRAgents.
Here is an example to associate/disassociate a BGP Speaker to/from a DRAgent.
::
(neutron) bgp-speaker-list
+--------------------------------------+------+----------+------------+
| id | name | local_as | ip_version |
+--------------------------------------+------+----------+------------+
| 0967eb04-59e5-4ca6-a0b0-d584d8d4a132 | bgp2 | 200 | 4 |
| a73432c3-a3fc-4b1e-9be2-6c32a61df579 | bgp1 | 100 | 4 |
+--------------------------------------+------+----------+------------+
(neutron) agent-list
+--------------------------------------+---------------------------+---------------------+-------------------+-------+----------------+---------------------------+
| id | agent_type | host | availability_zone | alive | admin_state_up | binary |
+--------------------------------------+---------------------------+---------------------+-------------------+-------+----------------+---------------------------+
| 0c21a829-4fd6-4375-8e65-36db4dc434ac | DHCP agent | steve-devstack-test | nova | :-) | True | neutron-dhcp-agent |
| 0f9d6886-910d-4af4-b248-673b22eb9e78 | Metadata agent | steve-devstack-test | | :-) | True | neutron-metadata-agent |
| 5908a304-b9d9-4e8c-a0af-96a066a7c87e | Open vSwitch agent | steve-devstack-test | | :-) | True | neutron-openvswitch-agent |
| ae74e375-6a75-4ebe-b85c-6628d2baf02f | L3 agent | steve-devstack-test | nova | :-) | True | neutron-l3-agent |
| dbd9900e-9d16-444d-afc4-8d0035df5ed5 | BGP dynamic routing agent | steve-devstack-test | | :-) | True | neutron-bgp-dragent |
+--------------------------------------+---------------------------+---------------------+-------------------+-------+----------------+---------------------------+
(neutron) bgp-dragent-speaker-add dbd9900e-9d16-444d-afc4-8d0035df5ed5 bgp1
Associated BGP speaker bgp1 to the Dynamic Routing agent.
(neutron) bgp-speaker-list-on-dragent dbd9900e-9d16-444d-afc4-8d0035df5ed5
+--------------------------------------+------+----------+------------+
| id | name | local_as | ip_version |
+--------------------------------------+------+----------+------------+
| a73432c3-a3fc-4b1e-9be2-6c32a61df579 | bgp1 | 100 | 4 |
+--------------------------------------+------+----------+------------+
(neutron) bgp-dragent-speaker-remove dbd9900e-9d16-444d-afc4-8d0035df5ed5 bgp1
Disassociated BGP speaker bgp1 from the Dynamic Routing agent.
(neutron) bgp-speaker-list-on-dragent dbd9900e-9d16-444d-afc4-8d0035df5ed5
(neutron)
.. note:: Currently, auto-scheduling is not supported.
ReST API's for neutron-dynamic-routing scheduler is defined in the
API document :doc:`api`