Support regex matching when filtering port with IP address

Registered by Zhenyu Zheng

Problem
=======
The GET /ports API only support exact matching when filtering by IP address.
Providing support for more powerful regex matching filtering could be very
useful.

Usecase
=======
Nova allows filtering instance by IP address and it is in regex matching
manner, but it now has serious performance issue [1]. How to enhance the
performance of this filter has been discussed in Queens PTG [2]. When
filtering instance by IP addresses, first calling Neutron port list API
with IP address filtering, and then retrieve the instance UUID in Nova
side could be a possible solution to improve the performance.

As Nova allows regex manner filtering, it could be better to make Neutron
also support regex matching.

Proposal
========
Adding regex matching support in DB layer using "LIKE" SQL phrase [3].

References
==========
[1] https://bugs.launchpad.net/nova/+bug/1711303
[2] http://lists.openstack.org/pipermail/openstack-dev/2017-September/122258.html
[3] http://lists.openstack.org/pipermail/openstack-operators/2017-October/014459.html

Blueprint information

Status:
Not started
Approver:
None
Priority:
Undefined
Drafter:
Zhenyu Zheng
Direction:
Needs approval
Assignee:
Zhenyu Zheng
Definition:
New
Series goal:
None
Implementation:
Unknown
Milestone target:
None

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