Comment 1 for bug 1896617

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Nikolay Vinogradov (nikolay.vinogradov) wrote : Re: Creation of image (or live snapshot) from the existing VM fails if libvirt-image-backend is configured to qcow2

I'm seeing that on the Bionic/Ussuri as well. Image from a VM on qcow2 ephemeral storage can't be created if VM is running, but if the VM is stopped it succeeds. Meanwhile image from a VM on Ceph can be created with no issues.

Also tested with 'raw' image backend: https://pastebin.canonical.com/p/yzTbx4kRXv/