Make an exact copy of a created OpenStack instance
How can i create an OpenStack instance with same content and characteristic of a created instance (same systems, software and resources deployed and installed in in the first instance) ?
Take a snapshot of the VM and then launch instance out of it
How i cannot understand what you mean ?
@Bernd Bausch any suggestion please ?
As Deepa says. openstack server image create, then launch an instance from the image.
@najeh Use command openstack server image create<instance-id> and a snapshot/image of 0bytes will be uploaded to glance .Use this image and then launch a server with or without volume as per your environment