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[Takashi NATSUME <natsume.takashi@xxxxxxxxxxxxx>]

** Changed in: nova
       Status: In Progress => Opinion

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https://bugs.launchpad.net/bugs/1311082

Title:
  The details of libvirt events are not outputted to the log when nova-
  compute handles libvirt events.

Status in OpenStack Compute (Nova):
  Opinion

Bug description:
  Currently, the details of libvirt events are not outputted to the log when nova-compute handles libvirt events.
  The details of libvirt events should be outputted to the log for troubleshooting.

  By the following blue print, nova has been able to catch libvirt
  events and synchronize the VM state with 'actual' state immediately.

  Compute Driver Events
  https://blueprints.launchpad.net/nova/+spec/compute-driver-events

  When nova-compute handles libvirt events, it outputs which libvirt events(EVENT_LIFECYCLE_STARTED, EVENT_LIFECYCLE_STOPPED, EVENT_LIFECYCLE_PAUSED, EVENT_LIFECYCLE_RESUMED) are received.
  But the details(cause/reason) of libvirt events are not outputted.
  For example, in the case of VIR_DOMAIN_EVENT_STOPPED(=EVENT_LIFECYCLE_STOPPED), the details are as follows(*1).

  VIR_DOMAIN_EVENT_STOPPED_SHUTDOWN = 0 Normal shutdown
  VIR_DOMAIN_EVENT_STOPPED_DESTROYED = 1 Forced poweroff from host
  VIR_DOMAIN_EVENT_STOPPED_CRASHED = 2 Guest crashed
  VIR_DOMAIN_EVENT_STOPPED_MIGRATED = 3 Migrated off to another host
  VIR_DOMAIN_EVENT_STOPPED_SAVED = 4 Saved to a state file
  VIR_DOMAIN_EVENT_STOPPED_FAILED = 5 Host emulator/mgmt failed
  VIR_DOMAIN_EVENT_STOPPED_FROM_SNAPSHOT = 6 offline snapshot loaded
  VIR_DOMAIN_EVENT_STOPPED_LAST = 7

  *1: http://libvirt.org/html/libvirt-libvirt.html

  If the details of libvirt events are outputted to the log, it will be
  useful in troubleshoot.

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