[openstack-dev] Change in openstack/trove[master]: Ophaned Volume Not Removed on Instance Delete

Peter Stachowski peter at tesora.com
Wed Jun 29 12:02:44 UTC 2016


Hi Will,

Any time.  ☺  If there is specific functionality that you think is missing and would like to see added to Trove, please enter a blueprint.  Thanks!

Peter

From: Will Zhou [mailto:zzxwill at gmail.com]
Sent: June-29-16 12:53 AM
To: OpenStack Development Mailing List (not for usage questions); Ali Adil
Subject: Re: [openstack-dev] Change in openstack/trove[master]: Ophaned Volume Not Removed on Instance Delete

Hi Peter,

I got the point and I realize that I am wrong about the fix. Thanks for the clarification.
On Wed, Jun 29, 2016 at 6:42 AM Peter Stachowski <peter at tesora.com<mailto:peter at tesora.com>> wrote:
Hi Will,

Trove is a managed database service.  Once you delete the database, all associated volumes with it are also deleted, as is the Nova instance.  One of the key benefits of using Trove is that you don’t have to manage servers/volumes/security_groups etc.  Also, depending on the provider’s implementation, the volume may not be visible to the end user and thus would just be left lying around using up resources if it isn’t deleted by Trove (while potentially having the use charged back to the end user).  This is the case that is being addressed – having a volume left undeleted even if the Nova instance is gone (or in this case didn’t start successfully).

Thanks,
Peter


From: Will Zhou [mailto:zzxwill at gmail.com<mailto:zzxwill at gmail.com>]
Sent: June-28-16 10:55 AM
To: OpenStack Development Mailing List (not for usage questions); Ali Adil

Subject: Re: [openstack-dev] Change in openstack/trove[master]: Ophaned Volume Not Removed on Instance Delete

Hi Scott, many thanks for your figuration.  Thanks and +1 for your nomination to nova core:)

Hi aadil, we should DETACH the volume, instead of DELETE. Please help enhance your code which is really a helpful fix to the bug. Thanks.

On Tue, Jun 28, 2016 at 10:51 PM D'Angelo, Scott <scott.dangelo at hpe.com<mailto:scott.dangelo at hpe.com>> wrote:
If a volume is attached to an instance, and the instance is deleted, the volume will be DETACHED, but the volume will still exist, it will NOT be DELETED.

It is up to the volume owner to delete the volume if they wish.

________________________________
From: Will Zhou <zzxwill at gmail.com<mailto:zzxwill at gmail.com>>
Sent: Tuesday, June 28, 2016 8:43:51 AM
To: aadil at tesora.com<mailto:aadil at tesora.com>; OpenStack Development Mailing List (not for usage questions)
Subject: Re: [openstack-dev] Change in openstack/trove[master]: Ophaned Volume Not Removed on Instance Delete

Hi all,

I'd like to make sure should the volume, which is attached to an instance, be detached or be deleted after the instance is deleted? Thanks.


On Tue, Jun 28, 2016 at 10:16 PM Ali Asgar Adil (Code Review) <review at openstack.org<mailto:review at openstack.org><mailto:review at openstack.org<mailto:review at openstack.org>>> wrote:
Ali Asgar Adil has posted comments on this change.

Change subject: Ophaned Volume Not Removed on Instance Delete
......................................................................


Patch Set 1:

In what situation would a nova instance be in "available" state. Also, we are are deleting the instance so we would want the volume to be deleted as well not detached.

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Gerrit-MessageType: comment
Gerrit-Change-Id: Ie921a8ff2851e2d9d76a3c3836945c750f090c4e
Gerrit-PatchSet: 1
Gerrit-Project: openstack/trove
Gerrit-Branch: master
Gerrit-Owner: Ali Asgar Adil <aadil at tesora.com<mailto:aadil at tesora.com><mailto:aadil at tesora.com<mailto:aadil at tesora.com>>>
Gerrit-Reviewer: Ali Asgar Adil <aadil at tesora.com<mailto:aadil at tesora.com><mailto:aadil at tesora.com<mailto:aadil at tesora.com>>>
Gerrit-Reviewer: Jenkins
Gerrit-Reviewer: zzxwill <zzxwill at gmail.com<mailto:zzxwill at gmail.com><mailto:zzxwill at gmail.com<mailto:zzxwill at gmail.com>>>
Gerrit-HasComments: No
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