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[s10 <1817022@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

It would be useful to have the option to specify inactivity_probe and
max_backoff for OVS bridge controllers in neutron config.

OVS documentation says (https://github.com/openvswitch/ovs/blob/master/ovn/TODO.rst):
The default 5 seconds inactivity_probe value is not sufficient and ovsdb-server drops the client IDL connections for openstack deployments when the neutron server is heavily loaded.

This indeed can happen under the heavy load in neutron-ovs-agent. This
was discussed in http://eavesdrop.openstack.org/irclogs/%23openstack-
neutron/%23openstack-neutron.2017-01-27.log.html#t2017-01-27T02:46:22 ,
and the solution was to increase inactivity_probe.

Alternative is to set this settings manually after each neutron-ovs-agent restart:
ovs-vsctl set Controller br-tun inactivity_probe=30000
ovs-vsctl set Controller br-int inactivity_probe=30000
ovs-vsctl set Controller br-ex inactivity_probe=30000
ovs-vsctl set Controller br-tun max_backoff=5000
ovs-vsctl set Controller br-int max_backoff=5000
ovs-vsctl set Controller br-ex max_backoff=5000

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1817022

Title:
  RFE: set inactivity_probe and max_backoff for OVS bridge controller

Status in neutron:
  New

Bug description:
  It would be useful to have the option to specify inactivity_probe and
  max_backoff for OVS bridge controllers in neutron config.

  OVS documentation says (https://github.com/openvswitch/ovs/blob/master/ovn/TODO.rst):
  The default 5 seconds inactivity_probe value is not sufficient and ovsdb-server drops the client IDL connections for openstack deployments when the neutron server is heavily loaded.

  This indeed can happen under the heavy load in neutron-ovs-agent. This
  was discussed in http://eavesdrop.openstack.org/irclogs/%23openstack-
  neutron/%23openstack-neutron.2017-01-27.log.html#t2017-01-27T02:46:22
  , and the solution was to increase inactivity_probe.

  Alternative is to set this settings manually after each neutron-ovs-agent restart:
  ovs-vsctl set Controller br-tun inactivity_probe=30000
  ovs-vsctl set Controller br-int inactivity_probe=30000
  ovs-vsctl set Controller br-ex inactivity_probe=30000
  ovs-vsctl set Controller br-tun max_backoff=5000
  ovs-vsctl set Controller br-int max_backoff=5000
  ovs-vsctl set Controller br-ex max_backoff=5000

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