[libvirt] Event after reverting to snapshot

[Dmitry Andreev]

Hi,

I'm looking for a way to catch an event about reverting to snapshot.

As I can see in the code there is no lifecycle event if VM state wasn't 
changed.

The comment in the code of qemuDomainRevertToSnapshot:

     /* We have the following transitions, which create the following 
events:
      * 1. inactive -> inactive: none
      * 2. inactive -> running:  EVENT_STARTED
      * 3. inactive -> paused:   EVENT_STARTED, EVENT_PAUSED
      * 4. running  -> inactive: EVENT_STOPPED
      * 5. running  -> running:  none
      * 6. running  -> paused:   EVENT_PAUSED
      * 7. paused   -> inactive: EVENT_STOPPED
      * 8. paused   -> running:  EVENT_RESUMED
      * 9. paused   -> paused:   none
      * Also, several transitions occur even if we fail partway through,
      * and use of FORCE can cause multiple transitions.
      */

Also there is no VIR_DOMAIN_EVENT_DEFINED event after reverting to 
snapshot, even when domain configuration is changed. Isn't that strange? 
Checked on stopped VM.

Is there any way to catch event about changes in configuration after 
reverting to snapshot.