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[Robin Wang <wangbibo@xxxxxxxxxx>]

Public bug reported:

OVS crash/restart is unpredictable, so neutron-ovs-agent should be
robust enough under that situation.

But currently ovs-agent would crash when ovs is restarted or dead.

An simple reproduce procedure:

It's an compute node, built on ubuntu 14.04. Neutron code is up to date.

1. Make sure both ovs and neutron-ovs-agent is running;
=====================================
$ service openvswitch-switch status
openvswitch-switch start/running

bengo@Ctl-Nwk-Ubt-Dk-1404:/opt/stack/logs$ ps -e | grep ovs
  932 ?        00:00:02 ovsdb-server
  942 ?        00:02:04 ovs-vswitchd
29210 pts/21   00:00:00 ovsdb-client

$ ps -eLf | grep neutron-openvswitch-agent
bengo    25701  3271 25701  0    1 12:12 pts/13   00:00:00 grep --color=auto neutron-openvswitch-agent
bengo    28927 28926 28927  0    1 03:32 pts/21   00:02:35 python /usr/local/bin/neutron-openvswitch-agent --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugins/ml2/ml2_conf.ini
=====================================


2. Stop ovs service (ovsdb-server/ovs-vswitch/..)
=====================================
$ service openvswitch-switch stop
openvswitch-switch stop/waiting
=====================================


3.  Neutron-ovs-agent crashes.
=====================================
$ ps -eLf | grep neutron-openvswitch-agent
bengo    21803  9492 21803  0    1 03:42 pts/12   00:00:00 grep --color=auto neutron-openvswitch-agent
=====================================

** Affects: neutron
     Importance: Undecided
     Assignee: Robin Wang (robinwang)
         Status: New


** Tags: crash neutron

** Changed in: neutron
     Assignee: (unassigned) => Robin Wang (robinwang)

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https://bugs.launchpad.net/bugs/1350179

Title:
  neutron-ovs-agent crashes when ovs is restarted or dead

Status in OpenStack Neutron (virtual network service):
  New

Bug description:
  OVS crash/restart is unpredictable, so neutron-ovs-agent should be
  robust enough under that situation.

  But currently ovs-agent would crash when ovs is restarted or dead.

  An simple reproduce procedure:

  It's an compute node, built on ubuntu 14.04. Neutron code is up to
  date.

  1. Make sure both ovs and neutron-ovs-agent is running;
  =====================================
  $ service openvswitch-switch status
  openvswitch-switch start/running

  bengo@Ctl-Nwk-Ubt-Dk-1404:/opt/stack/logs$ ps -e | grep ovs
    932 ?        00:00:02 ovsdb-server
    942 ?        00:02:04 ovs-vswitchd
  29210 pts/21   00:00:00 ovsdb-client

  $ ps -eLf | grep neutron-openvswitch-agent
  bengo    25701  3271 25701  0    1 12:12 pts/13   00:00:00 grep --color=auto neutron-openvswitch-agent
  bengo    28927 28926 28927  0    1 03:32 pts/21   00:02:35 python /usr/local/bin/neutron-openvswitch-agent --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugins/ml2/ml2_conf.ini
  =====================================

  
  2. Stop ovs service (ovsdb-server/ovs-vswitch/..)
  =====================================
  $ service openvswitch-switch stop
  openvswitch-switch stop/waiting
  =====================================

  
  3.  Neutron-ovs-agent crashes.
  =====================================
  $ ps -eLf | grep neutron-openvswitch-agent
  bengo    21803  9492 21803  0    1 03:42 pts/12   00:00:00 grep --color=auto neutron-openvswitch-agent
  =====================================

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