Storage Volume: Default qcow2 version should be 1.1
Goal
As per the documentation, the default qcow2 version if not specified otherwise is 0.10. The default version since QEMU 1.7 is 1.1. Certain things such as live backups (see https://github.com/abbbi/virtnbdbackup) require qcow2 compat level 1.1 to work. I am proposing the default be raised to 1.1.
Technical details
From the docs: https://gitlab.com/libvirt/libvirt/-/blob/master/docs/formatstorage.rst#storage-volume-target-elements
compat Specify compatibility level. So far, this is only used for type='qcow2' volumes. Valid values are 0.10 and 1.1 so far, specifying QEMU version the images should be compatible with. If the feature element is present, 1.1 is used. Since 1.1.0 If omitted, 0.10 is used. Since 1.1.2
If using qemu-img today it will create v1.1 qcow2 files.
Additional information
https://wiki.qemu.org/Features/Qcow3
https://github.com/abbbi/virtnbdbackup