usage: virt_dup.py [-h] [-v] [--set-ip-cidr CIDR]
                   [--change-ip from,to [from,to ...]]
                   VM_NAME [VM_NAME ...]

This tool is to duplicate Virtual Machines in seconds rather than minutes.
The trick is to deploy all VM images in the filesystem with the native
COW(--reflink) capability, eg. btrfs, xfs-4.16, ocfs2, etc. Noted that
virt-clone leverages the native COW(--reflink) capability of the filesystem
to duplicate RAW, but not for qcow2 by now at the end of 2018. This tool

- reset hostname as same as the Virtual Machine name
- reset MAC addresses
- reset static IP to dhcp, if not specify '--change-ip'
- calibrate /etc/hosts with VM_NAME, --set-ip-cidr, and --change-ip
- is compatible with openSUSE MicroOS

Tips:
- to let a image shared among Virtual Machines, you should
  avoid the Virtual Machine name to be the substring of the image name.

positional arguments:
  VM_NAME               The original VM must exist in `virsh list --all`

options:
  -h, --help            show this help message and exit
  -v, --verbose, -d, --debug
  --set-ip-cidr CIDR    add IP_CIDR to the first NIC
  --change-ip from,to [from,to ...]
                        string replace of IP is handy. 'no' means don't touch
                        IP addr

examples:
virt-dup VM_NAME  # it implies `virt-dup VM_NAME VM_NAME_dup`
virt-dup VMx VM1 VM2 VM3

To create 3 virtual machines, which has its own unique ip from 101 to 103
virt-dup VMx VM{1..3} --set-ip-cidr 2001:db8:dead:beef::101
virt-dup VMx VM{1..3} --set-ip-cidr 192.168.151.101/16

Use the following example with care!
virt-dup VMx VMy --change-ip str1,str2 192.168.150,192.168.151

To rename the virtual machine only
virt-dup VMx VMy --change-ip no