If you use Ansible to manage your servers, installing Mongrate via Ansible is easy:

- name: Install Mongrate
  get_url: url=http://mongrate.com/download?ansible dest=/usr/bin/mongrate mode=0555 force=no

Configuring /etc/mongrate.yml is up to you, but you can download the sample file easily too:

- name: Copy default Mongrate configuration
  get_url: url=http://mongrate.com/sample-config.yml?ansible dest=/etc/mongrate.yml force=no