How to retreive a file from an old VM?

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Hey folks!

Yesterday the os-control01.stg machine was reinstalled as RHEL9. Unfortunately there was a script on there that I forgot to backup. I would like, if possible, to retreive it. The old VM disk is still on the VM server as /dev/vg_guests/os-control01.stg.iad2.fedoraproject.org-el7. I tried to naively mount it but it's a block device, not a partition. I tried to mount it with the offset that fdisk gives me for the root partition: # mount  -o offset=$((512*5244928)),other,options,here /dev/vg_guests/os-control01.stg.iad2.fedoraproject.org-el7 /mnt/tmpextract/
mount: /mnt/tmpextract: unknown filesystem type 'LVM2_member'.
But as you can see it's an LVM volume so I can't use it directly.
I don't want to risk polluting the main LVM setup on the machine, so if know of a way to read files from old VM disks I'm interested. The file I'd like to get is /usr/local/bin/jobs-summary. It's not a huge loss but it's still a few hours of work. And if we find a good way of doing this we may want to add it to our SOPs in case it happens again in the future :-)

Thanks!

Aurélien
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