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/
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/yzTbx4kRX v/