Ubuntu
uvtool package

How to identify backing file for uvtool-created guest when multiple files exist?

Asked by Mark Thomas

I have performed a uvt-simplestreams-sync for xenial, trusty, and precise (yes, I still have one). I then did a uvt-kvm create myguest --release=xenial. I would like to qemu-img rebase/commit to create a single virtual disk file that I can move elsewhere. When I perform "file /var/lib/uvtool/libvirt/images/myguest.qcow" it tells me:

myguest.qcow: QEMU QCOW Image (v2), has backing file (path /var/lib/uvtool/libvirt/images/x-uvt-b64-Y29tLnVidW50dS5jbG91ZD)

However, the names of my image files are:
x-uvt-b64-Y29tLnVidW50dS5jbG91ZDpzZXJ2ZXI6MTIuMDQ6YW1kNjQgMjAxNzA1MDI=
x-uvt-b64-Y29tLnVidW50dS5jbG91ZDpzZXJ2ZXI6MTYuMDQ6YW1kNjQgMjAxNzA1MTY=
x-uvt-b64-Y29tLnVidW50dS5jbG91ZDpzZXJ2ZXI6MTYuMDQ6YW1kNjQgMjAxNzA2MTkuMQ==

as you can see, I can't identify from that truncated string which backing file is used by that virtual disk

Is there any way I can identify which backing file is being used by this guest without trial-and-error removal of the files one by one?

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Launchpad Janitor (janitor) said : 		#1

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