[Bug 1471022] Re: [SRU] race between nova-compute and neutron-ovs-cleanup

[Edward Hope-Morley]

** Description changed:

  This issue appears to be a consequence of
  https://bugs.launchpad.net/ubuntu/+source/nova/+bug/1420572 where we
  added a 'wait-for-state running' to the nova-compute upstart so as to
  ensure that neutron-ovs-cleanup has finished before nova-compute starts.
  
  I have started to spot, however, that on some hosts (metal only) there
- is now a race between the two whereby nova-compute fails to start or
- boot/reboot with the following in /var/log/upstart/nova-compute.log:
+ is now a race between the two whereby nova-compute sometimes fails to
+ start or boot/reboot with the following in /var/log/upstart/nova-
+ compute.log:
  
  ...
  libvirt-bin stop/waiting
  wait-for-state stop/waiting
  neutron-ovs-cleanup start/pre-start, process 3084
  start: Job failed to start
  
  If I manually restart nova-compute all is fine. So this looks like a
  race between nova-compute's wait-for-state and neutron-ovs-cleanup's
  pre-start -> start/running.

** Description changed:

  This issue appears to be a consequence of
  https://bugs.launchpad.net/ubuntu/+source/nova/+bug/1420572 where we
  added a 'wait-for-state running' to the nova-compute upstart so as to
  ensure that neutron-ovs-cleanup has finished before nova-compute starts.
  
  I have started to spot, however, that on some hosts (metal only) there
  is now a race between the two whereby nova-compute sometimes fails to
- start or boot/reboot with the following in /var/log/upstart/nova-
+ start on system boot/reboot with the following in /var/log/upstart/nova-
  compute.log:
  
  ...
  libvirt-bin stop/waiting
  wait-for-state stop/waiting
  neutron-ovs-cleanup start/pre-start, process 3084
  start: Job failed to start
  
  If I manually restart nova-compute all is fine. So this looks like a
  race between nova-compute's wait-for-state and neutron-ovs-cleanup's
  pre-start -> start/running.

** Changed in: neutron (Ubuntu Trusty)
   Importance: Undecided => High

** Changed in: neutron (Ubuntu Utopic)
   Importance: Undecided => High

** Changed in: neutron (Ubuntu Vivid)
   Importance: Undecided => High

** Changed in: neutron (Ubuntu)
       Status: New => In Progress

** Changed in: neutron (Ubuntu)
     Assignee: (unassigned) => Edward Hope-Morley (hopem)

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https://bugs.launchpad.net/bugs/1471022

Title:
  [SRU] race between nova-compute and neutron-ovs-cleanup

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