Public bug reported:
Currently it is possible to delete the glance images, even if instances are
still referencing it.
This is in particular an issue once you deleted the image and tried to
resize/migrate instances to a new host.
The new host can't download the image from glance and the instance can't start
anymore due to the missing qemu backing file. In case of a resize, the action
does abort since the coalescing of the qemu file, happening during resize, can
not be completed without the qemu backing file.
This issue usually causes manual intervention to reset the instance action,
state and manual search/copy of the base image file to the target host.
The ideal state would be to prevent image-delete requests as long as active
instances are still referencing it.
** Affects: glance
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1485635
Title:
Delete image should not progress as long as instances using it
Status in Glance:
New
Bug description:
Currently it is possible to delete the glance images, even if instances are
still referencing it.
This is in particular an issue once you deleted the image and tried to
resize/migrate instances to a new host.
The new host can't download the image from glance and the instance can't
start anymore due to the missing qemu backing file. In case of a resize, the
action does abort since the coalescing of the qemu file, happening during
resize, can not be completed without the qemu backing file.
This issue usually causes manual intervention to reset the instance action,
state and manual search/copy of the base image file to the target host.
The ideal state would be to prevent image-delete requests as long as active
instances are still referencing it.
To manage notifications about this bug go to:
https://bugs.launchpad.net/glance/+bug/1485635/+subscriptions
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