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[OpenStack Infra <1871239@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.opendev.org/726787
Committed: https://git.openstack.org/cgit/openstack/ovn-octavia-provider/commit/?id=23d743a444a426379499193324723a9c7ab33734
Submitter: Zuul
Branch:    master

commit 23d743a444a426379499193324723a9c7ab33734
Author: Maciej Józefczyk <mjozefcz@xxxxxxxxxx>
Date:   Mon May 11 10:16:56 2020 +0000

    Add support for OVN LB selection fields
    
    Prior this patch OVN Octavia provider driver used
    default 5-tuple-hash algorithm which is pretty similar to
    SOURCE_IP_PORT.
    
    Unfornutelly because of the bug described here [1] it
    was not clear how 5-tuple-hash works and some inconsistencies
    between kernel and user space implementations were found.
    
    OVN recently added support for selective fields in OVN LB, to
    explicitly define what fields are being hashed to tackle this problem.
    
    This commit adds support for that kind of hashing. If installation
    of OVN on which OVN Octavia provider is running doesn't support
    selective fields - it will use old behavior.
    
    [1] https://mail.openvswitch.org/pipermail/ovs-discuss/2020-April/049896.html
    [2] https://github.com/ovn-org/ovn/commit/5af304e7478adcf5ac50ed41e96a55bebebff3e8
    
    
    Change-Id: I7b4ab99d1be2855e18b186557990c85f170ad548
    Closes-Bug: #1871239


** Changed in: neutron
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1871239

Title:
  ovn-octavia-provider is not using load balancing algorithm source-ip-
  port

Status in neutron:
  Fix Released

Bug description:
  When using the ovn-octavia-provider, OVN is not honoring the
  SOURCE_IP_PORT pool load balancing algorithm. The ovn-octavia-provider
  only supports the SOURCE_IP_PORT load balancing algorithm.

  The following test was created for the SOURCE_IP_PORT algorithm in tempest:
  octavia_tempest_plugin.tests.scenario.v2.test_traffic_ops.TrafficOperationsScenarioTest.test_source_ip_port_tcp_traffic

  Available in this patch: https://review.opendev.org/#/c/714004/

  The test run shows that OVN is randomly distributing the connections
  from the same source IP and port across the backend member servers.
  One server is configured to return '1' and the other '5'.

  Loadbalancer response totals: {'1': 12, '5': 8}

  It should be seeing a result of:

  Loadbalancer response totals: {'1': 20}

  The attached files provide:

  ovn-provider.pcap -- A pcap file capturing the test run.
  ovn-tempest-output.txt -- The tempest console output.
  tempest.log -- The tempest framework log from the test run.

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