You can simply perform an
rsyncoperation from the source machine on the Proxmox server, and then create a configuration file for the OpenVZ container.
You can create a blank container and copy the data from the source. You can view the link http://goo.gl/byzsji for your reference.
If we start our migration with the template file, we are likely to run into trouble for comparing the files on the source and destination machines, because the target container will also contain the data copied from the template. Therefore, it is much better to create the container using the GUI, keeping the configuration files, and remove all...