KVM NFS template image
For qcow2 format images, when creating a new VM in KVM, the template
image is copied from secondary storage to primary storage, and the root
volume image is created with the template image as a backing file.
But when I break this backing chain on primary(expunge VM or revert to a
snapshot previously created on the root volume image), the template
image is not deleted.
Might I ask how is the template image going to be cleaned from the
CS ver 4.9.2 on CentOS 7.2