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[Robie Basak <1583503@xxxxxxxxxxxxxxxxxx>]

** Also affects: keepalived (Ubuntu Trusty)
   Importance: Undecided
       Status: New

** Also affects: keepalived (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Changed in: keepalived (Ubuntu Trusty)
       Status: New => Triaged

** Changed in: keepalived (Ubuntu Xenial)
       Status: New => Triaged

** Changed in: keepalived (Ubuntu Trusty)
   Importance: Undecided => Medium

** Changed in: keepalived (Ubuntu Xenial)
   Importance: Undecided => Medium

** Tags added: bitesize

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https://bugs.launchpad.net/bugs/1583503

Title:
  keepalived fails to start when PID file is empty

Status in neutron:
  New
Status in keepalived package in Ubuntu:
  Fix Released
Status in keepalived source package in Trusty:
  Triaged
Status in keepalived source package in Xenial:
  Triaged

Bug description:
  After a crash of a network node, we were left with empty PID files for
  some keepalived processes:

   root@network-node14:~# ls -l /var/lib/neutron/ha_confs/0ab5f647-1e04-4345-ae9b-ee66c6f08882.pid
  -rw-r--r-- 1 root root 0 May 19 08:41 /var/lib/neutron/ha_confs/0ab5f647-1e04-4345-ae9b-ee66c6f08882.pid

  This causes the L3 agent to log the following errors repeating every
  minute:

  2016-05-19 08:46:44.525 13554 ERROR neutron.agent.linux.utils [-] Unable to convert value in /var/lib/neutron/ha_confs/0ab5f647-1e04-4345-ae9b-ee66c6f08882.pid
  2016-05-19 08:46:44.526 13554 ERROR neutron.agent.linux.external_process [-] keepalived for router with uuid 0ab5f647-1e04-4345-ae9b-ee66c6f08882 not found. The process should not have died
  2016-05-19 08:46:44.526 13554 WARNING neutron.agent.linux.external_process [-] Respawning keepalived for uuid 0ab5f647-1e04-4345-ae9b-ee66c6f08882
  2016-05-19 08:46:44.526 13554 ERROR neutron.agent.linux.utils [-] Unable to convert value in /var/lib/neutron/ha_confs/0ab5f647-1e04-4345-ae9b-ee66c6f08882.pid
  2016-05-19 08:46:44.526 13554 ERROR neutron.agent.linux.utils [-] Unable to convert value in /var/lib/neutron/ha_confs/0ab5f647-1e04-4345-ae9b-ee66c6f08882.pid-vrrp

  and the keepalived process fails to start. As a result, the routers
  hosted by this agent are non-functional.

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