Don't try introducing two new technologies at one time. You pretty much have to use configuration management regardless if you're on Docker or not, so I would a

Don't try introducing two new technologies at one time. You pretty much have to use configuration management regardless if you're on Docker or not, so I would absolutely recommend to start with Ansible (or Salt/Puppet/Chef) and use that to its fullest potentinal. Only then do you know what your use case for containers are, and how to set them up effectively using your configuration management infrastructure.