i want to create a template for multiple vm deployment from a existing image ,,i basically have template vm ready with image in qcow2 format at path /kvm/template.qcow2. I have heard about virt-sysprep which can modiy hostname,ssh host keys, and etc,, all packages are installed.when i try to do basic virt-sysprep cmd i get no operating system found error.  My Host Machine is Centos 6.9 , and guest vm is Centos7[root@ns0 kvm]# virt-sysprep --format qcow2 -a template.qcow2Examining the guest ...virt-sysprep: no operating systems were found in the guest image[root@ns0 kvm]#[root@ns0 kvm]#[root@ns0 kvm]# ls -lh | grep template.qcow2-rw-r--r-- 1 root root  16G Aug 16 05:27 template.qcow2
kvm template creation issue
linux;virtual machine;kvm;libvirtd