Keep or reuse lxc volume

Hi !

I use LXC to run services.
But, if a service goes down or be corrupted I want to remove the LXC container and renew it.
The same case if I upgrade the rootfs.

But, I have mount points that contain data and I want to keep them or reuse them without delete sensitive data.
My volumes are on a ceph rbd storage.

I'm unable to locate the disk and in fact to save it.

Is exisist a way to :
- Save data volume,
- Remove container,
- recreate the container,
- rebind the data volume

Thanks for...

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