Question: how to mount qcow2 image?
Answer: Enable NBD kernel driver on the KVM host. ...  Connect the qcow2 image as network block device. ...  Find the partitions in the image using fdisk. ...  The device /dev/nbd0p2, is LVM so you would need to locate the new PVs/VGs and LVs in the KVM host machine. ...  Activate the guest OS'es VG. ...  Mount the LVM partition.