GitHub user ProjectMoon opened a pull request:

    https://github.com/apache/cloudstack/pull/1491

    Fixes regarding VOLUME_DELETE events resulting from account deletion.

    New version of #1373, but updated for the 4.7 branch with another fix that 
allows it to properly find expunged root volumes. This is a bug fix, which is 
why we target the 4.7 branch.
    
    Original pull request:
    Fixes regarding usage event emission.
    
    UsageEventUtils was previously not checking deleted accounts, which meant 
that if an account was deleted that had some resources running on it, those 
resources would get destroyed without emitting any events.
    
    Furthermore, the VOLUME_DELETE event of ROOT volumes is the responsibility 
of the UserVmManager, which gets circumvented when expunging resources 
following the account deletion. Added a check to the AccountManager which 
catches the ROOT volumes that need to be deleted and emits events for them.
    
    To test this: Create a new user. As that user, create and destroy an 
instance. This should cause the VM_CREATE, VM_START, VM_STOP, VM_DESTROY, 
VOLUME_CREATE, and VOLUME_DELETE events to be emitted. 
    Create a new instance as the same user. Log in as admin, and delete the 
user. The same set of events should be emitted, and there should be no 
duplicate DELETE events for the ROOT volume of the previous instance.

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/greenqloud/cloudstack 
pr-volume-usage-events-fixes-4.7

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/cloudstack/pull/1491.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #1491
    
----
commit 4d6a7740a9db27a4c3ef71eee1f47900afbf1fb8
Author: nnesic <n...@greenqloud.com>
Date:   2015-10-12T13:15:30Z

    Emit a VOLUME_DELETE usage event when account deletion destroys an instance.
    
    Currently the logic about volume deletion seems to be that an event should 
be emitted
    when the volume delete is requested, not when the deletion completes.
    
    The VolumeStateListener specifically ignores destroy events for ROOT 
volumes, assuming
    that the ROOT volume only gets deleted when the instance is destroyed and 
the UserVmManager
    should take care of it.
    
    When deleting an account, all of its resources get destroyed, but the 
instance expunging
    circumvents the UserVmManager, and thus we miss the VOLUME_DESTROY usage 
event.
    Added a check in the AccountManager to emit the deletion event for ROOT 
volumes
    belonging to instances which weren't destroyed prior to the account 
deletion.

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