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[Armando Migliaccio <1264608@xxxxxxxxxxxxxxxxxx>]

RIP

** Changed in: neutron
       Status: In Progress => Won't Fix

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https://bugs.launchpad.net/bugs/1264608

Title:
  openvswitch agent plugin should execute batched ovs-vsctl CLI
  statements on __init__()

Status in neutron:
  Won't Fix

Bug description:
  When restarting neutron-plugin-openvswitch-agent, the plugin goes
  through a series of initialization calls, many of which call out to
  ovs-vsctl to set up things like the integration bridge, tun bridge and
  all the flows.

  I've seen this __init__() process take upwards of 2 hours (!) to
  complete on a small (<100 compute node) zone. Most of the time is
  spent spawning rootwrap'd calls to ovs-vsctl to set up the various
  tunnels, flows and bridges.

  ovs-vsctl can take a series of action arguments in the same CLI
  statement, and will perform those actions as an atomic unit. At the
  very least, the plugin's __init__() function's setup_xxx() subroutines
  should take advantages of this instead of looping over possibly dozens
  or hundreds of port and flows, each with a separate subprocess call
  out to utils.execute('ovs.vsctl...').

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