OpenStack Networking (Neutron) Specifications
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neutron-specs/specs/juno/dhcp-host-routes-and-dns-su...

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Adding support for host-routes and dns_nameservers options for Nuage Plugin
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https://blueprints.launchpad.net/neutron/+spec/dhcp-host-routes-and-dns-support-for-nuage-plugin
Adding support for host-routes and dns_nameservers options via DHCP options
for the Nuage Plugin
Problem description
===================
The current the Nuage Plugin does not support adding host routes or
DNS nameservers via DHCP options for a Neutron subnet.
Proposed change
===============
Currently the Nuage Plugin does not support Neutron's adding host routes or DNS
nameservers via DHCP options on a subnet.
The Nuage's VSP supports this feature and the support needs to be added in the
plugin code.
The following DHCP options will be supported :
- DNS nameserver
- Host routes
The proposed change is to support the creation of DNS nameserver and/or Host
routes using the Neutron DNS and Host routes
For example:
neutron subnet-create test 192.168.10.0/24\
--dns_nameservers list=true 8.8.4.4 8.8.8.8
This action will create a subnet name test with a CIDR 192.168.10.0/24.
The nameservers 8.8.4.4 8.8.8.8 will added to this subnet, this translate to a
subnet in the Nuage's VSP subnet with the same nameservers
The CRUD operations will be supported by the Nuage's VSP plugin for both
DNS nameserver and Host routes.
Alternatives
------------
None
Data model impact
-----------------
None
REST API impact
---------------
None
Security impact
---------------
None
Notifications impact
--------------------
None
Other end user impact
---------------------
None
Performance Impact
------------------
None
Other deployer impact
---------------------
None
Developer impact
----------------
None
Implementation
==============
The modification are required on the plugin.py
* The new method __create_port_gateway will be created.
This method will create a port of type network:dhcp for the current \
subnet and tenant
* The __validate_create_subnet method will be modified to allow the host_routes key to be a valid options of the subnet dictionary
* The update_subnet method will be added to the plugin
* The _create_nuage_subnet method will be merged into the create_subnet method. This will newly updated method will also create a DHCP port using the method _create_port_gateway described above.
Assignee(s)
-----------
Franck Yelles
Primary assignee:
fyelles
Other contributors:
Work Items
----------
* Extension code in Nuage plugin
* Nuage CI coverage addition
* Nuage Unit tests additions, the following test units will be updated/added :
* test_create_subnet_bad_hostroutes
* test_update_subnet_adding_additional_host_routes_and_dns
* test_create_subnet_with_one_host_route
* test_create_subnet_with_two_host_routes
* test_create_subnet_with_too_many_routes
* test_update_subnet_route
* test_update_subnet_route_to_None
* test_update_subnet_route_with_too_many_entries
* test_delete_subnet_with_route
* test_delete_subnet_with_dns_and_route
* test_validate_subnet_host_routes_exhausted
* test_validate_subnet_dns_nameservers_exhausted
Dependencies
============
None
Testing
=======
Unit Test coverage for the DHCP options within Nuage unit test
Nuage CI will be modified to start supporting this extension tests
Documentation Impact
====================
None
References
==========
None