We deploy using Erlang "releases", which bundle the Erlang vm along with your application and it's dependencies into a tarball with a script to run the application. You don't need to install Erlang on the target system, just unpack and run.
We use "mix release" to build the tarball, scp to the server and unpack, then run using an upstart unit which runs
"exec su -s /bin/sh -c 'exec "$0" "$@"' myuser -- /path/to/deploy/directory/bin/myapp foreground"
It's pretty painless. We are automating with Fabric now, but will likely be switching to Ansible soon.
We use "mix release" to build the tarball, scp to the server and unpack, then run using an upstart unit which runs "exec su -s /bin/sh -c 'exec "$0" "$@"' myuser -- /path/to/deploy/directory/bin/myapp foreground"
It's pretty painless. We are automating with Fabric now, but will likely be switching to Ansible soon.