On Thu, 2024-09-05 at 16:02 +0700, Nguyễn Hữu Khôi wrote:
> Hi folks,
>
> I have this problem, It is glad if I had some guides for this situation.
>
> Openstack Version: 2023.1
>
> OS: Ubuntu 22.04
> Deployment Tool: Kolla-Ansible
>
> When I try to rescue an instance that booted from a volume, I cannot do so
> if the image used for the volume boot has been deleted

rescue uses the image the instance was created from where the instance is boot form image
or boot form volume by default if you do not provide one, but you can pass a different image
when calling rescue by specifying its id.

that should work even if the original image is deleted

> This is an error message:
>
> Instance 6deeed71-c701-42a3-a8f9-d89048a47c11 cannot be rescued: Driver
> Error: Block Device Mapping is Invalid: failed to get image
> 844ea429-23a5-43d4-8f65-19c879d63921.

i don't think there is anything glance can do as glance does not allow you to recreate an image
with a previous uuid as that would allow for malicious ABA attacks were a bad actor uploads an
image with the same uuid as a previously deleted one.
>
> Thank you.
>
> Nguyen Huu Khoi