Snapshot deletion could make Glance image unusable

[Jordan Pittier]

Hello,
When I boot an instance from a volume and then make a snapshot of this instance, I get a volume snapshot and a Glance Image that referenced this volume snapshot.

Now if I delete this volume snapshot, the Glance image reference a non existing snapshot and is unusable.

I think Cinder should warn the user that he is maybe doing something wrong, and that he would make the glance image unusable. There would be an option to force the snapshot delete.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/82789

[Mike Perez (thingee)]

Hi Jordan, thanks for the contribution. I don't believe this is a bug, but rather a blueprint. Do you mind submitting this as a blueprint instead since it's exposing a new feature. Thanks. https://wiki.openstack.org/wiki/Blueprints

[Jordan Pittier (jordan-pittier)]

I will.

[OpenStack Infra (hudson-openstack)]

Change abandoned by Jordan Pittier (<email address hidden>) on branch: master
Review: https://review.openstack.org/82789
Reason: I will go, instead, in favor of a client side solution to avoid to query glance from cinder-api.

[Sean McGinnis (sean-mcginnis)]

Automatically unassigning due to inactivity.

[Karthik Prabhu Vinod (karthik-prabhu-vinod)]

Hi All,

If the snapshot is deleted, the

$glance image-show <snapshot-id>

gives

 404 Not Found: No image found with ID bootablsnp (HTTP 404)

Can i go ahead and work on this for now? Or this needs to be further discussed as a blueprint?

Looking forward to some suggestions

thanks

[Sean McGinnis (sean-mcginnis)]

Not sure if a blueprint was ever filed or if any follow up work was completed on this. Would be good if someone can try to reproduce to verify it is still an issue.

[DavidPurcell (david-purcell)]

This is definitely still an issue. I followed the following steps: Created a volume, launched an instance from that volume, created a snapshot of that instance, successfully launched a new instance off the snapshot image, deleted the resulting snapshot volume, attempted to launch an instance off of the same snapshot and got the following error message:

Block Device Mapping is Invalid: failed to get snapshot 0b826812-3371-4784-a759-a2dfa385c1ed. (HTTP 400) (Request-ID: req-b0480ce5-1ef1-45bf-b16f-72cbbf3b6e2d).