Open Stack

Got it. Thanks for clarification!~

From: Jay S Bryant [mailto:jsbryant at us.ibm.com]
Sent: Wednesday, February 26, 2014 11:08 AM
To: OpenStack Development Mailing List (not for usage questions)
Cc: Luohao (brian)
Subject: Re: [openstack-dev] [Cinder] [Nova]Do you think volume force delete operation should not apply to the volume being used?

I would agree.  I don't think that Cinder should/could be able to act upon Nova's state for the VM.  Force-delete is really in place as a backup to clean-up after certain failures in Cinder.  Other mechanisms are in place to handle issues in Nova.


Jay S. Bryant
       IBM Cinder Subject Matter Expert  &  Cinder Core Member
Department 7YLA, Building 015-2, Office E125, Rochester, MN
Telephone: (507) 253-4270, FAX (507) 253-6410
TIE Line: 553-4270
E-Mail:  jsbryant at us.ibm.com<mailto:jsbryant at us.ibm.com>
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From:        "zhangyu (AI)" <zhangyu11 at huawei.com<mailto:zhangyu11 at huawei.com>>
To:        "OpenStack Development Mailing List (not for usage questions)" <openstack-dev at lists.openstack.org<mailto:openstack-dev at lists.openstack.org>>,
Cc:        "Luohao \(brian\)" <brian.luohao at huawei.com<mailto:brian.luohao at huawei.com>>
Date:        02/25/2014 08:20 PM
Subject:        Re: [openstack-dev] [Cinder] [Nova]Do you think volume force delete operation should not apply to the volume being used?
________________________________



IMHO, Attach/detach operations can only be issued from the Nova side because they are in fact VM/instance management operations.
Meanwhile, volume create/delete are volume management stuffs, therefore Cinder exposes API for them.

Also, according to current Cinder code base, no nova detach-volume action is issued from the execution flow of a volume deletion.

Thank you for suggestions~

From: Yuzhou (C) [mailto:vitas.yuzhou at huawei.com]
Sent: Wednesday, February 26, 2014 9:46 AM
To: OpenStack Development Mailing List (not for usage questions)
Cc: Luohao (brian)
Subject: Re: [openstack-dev] [Cinder] [Nova]Do you think volume force delete operation should not apply to the volume being used?

I think        force delete = nova detach volume,then cinder delete volume

Volume status in db shoud be modified after nova detach volume.

Thanks!


From: zhangyu (AI) [mailto:zhangyu11 at huawei.com]
Sent: Wednesday, February 26, 2014 8:56 AM
To: OpenStack Development Mailing List (not for usage questions)
Subject: Re: [openstack-dev] [Cinder] [Nova]Do you think volume force delete operation should not apply to the volume being used?

If I understand your question correctly, the case you describe should be like the following:

Assume we have created both an instance and a volume, then we try to  attach that volume to the instance.
Before that operation is completed (the status of the volume is “attaching” now), for whatever reasons we decide to apply a “force delete” operation on that volume.
Then, after we applied that force delete, we come to see that, from the Cinder side, the volume has been successfully deleted and the status is surely “deleted”.
However, from the Nova side, we see that the status of the deleted volume remains to be “attaching”.

If this is truly your case, I think it is a bug. The reason might lie in that, Cinder forgets to refresh the attach_status attribute of a volume in DB when applying a “force delete” operation.
Is there any other suggestions?

Thanks!



From: yunling [mailto:yunlingzeng at hotmail.com]
Sent: Monday, February 17, 2014 9:14 PM
To: openstack-dev at lists.openstack.org<mailto:openstack-dev at lists.openstack.org>
Subject: [openstack-dev] [Cinder]Do you think volume force delete operation should not apply to the volume being used?

Hi stackers:


I found that volume status become inconsistent (nova volume status is attaching, verus cinder volume status is deleted) between nova and cinder when doing volume force delete operation on an attaching volume.
I think volume force delete operation should not apply to the volume being used, which included the attached status of attaching, attached and detached.


How do you think?


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