yahoo-eng-team team mailing list archive

[Akihiro Motoki <1497272@xxxxxxxxxxxxxxxxxx>]

Per bug discussion, it is better to add a note on appropriate keepalived
versions to the networking guide.

** Also affects: openstack-manuals
   Importance: Undecided
       Status: New

** Tags added: networking-guide

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https://bugs.launchpad.net/bugs/1497272

Title:
  L3 HA: Unstable rescheduling time for keepalived v1.2.7

Status in neutron:
  Triaged
Status in openstack-manuals:
  New

Bug description:
  I have tested work of L3 HA on environment with 3 controllers and 1 compute (Kilo) with this simple scenario:
  1) ping vm by floating ip
  2) disable master l3-agent (which ha_state is active)
  3) wait for pings to continue and another agent became active
  4) check number of packages that were lost

  My results are  following:
  1) When max_l3_agents_per_router=2, 3 to 4 packages were lost.
  2) When max_l3_agents_per_router=3 or 0 (meaning the router will be scheduled on every agent), 10 to 70 packages were lost.

  I should mention that in both cases there was only one ha router.

  It is expected that less packages will be lost when
  max_l3_agents_per_router=3(0).

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