Definitely take a look onto Ansible[1]. We are using it on daily basis and to deploy and provision servers.

Deployment from CI was just 4 lines into CI config (fetch repo, set-up keys, deploy in the very same way as we do)

edit: we are using quite widely. Wanna create new servers in AWS - just run a playbook. Wanna setup new database cluster - just run a playbook. So easy

[1]: https://www.ansible.com/