Prepper is a simple server provisioning tool, built on top of SSHKit. You can use it to script your server build process. It is heavily inspired by (Sprinkle)[], but Sprinkle doesn't seem to be maintained anymore, that's why Prepper was born.


$ gem install prepper


Prepper works with "packages". You define a package with a name and pass it a block. Within that block you can execute commands on the target host. There are built in helpers to install apt packages, manage directories and upload files to the server, etc.

A simple example:

server_host "YOUR_SERVER_IP"
server_port 22
server_user "root"

# let's install the necessary packages to run a Rails app with Postgresql
package :apt do
  apt_install %w(git-core build-essential libcurl4 libcurl4-openssl-dev libjemalloc-dev postgresql-client libpq-dev postgresql-contrib)

# now we will add a deploy user
package :add_deploy_user do
  add_user 'deploy', shell: '/bin/bash', flags: '--disabled-password'

  directory '/home/deploy/.ssh', owner: 'deploy:deploy'
  file '/home/deploy/.ssh/authorized_keys', owner: 'deploy:deploy', mode: '655', content: 'ssh-rsa YOUR PUBLIC SSH KEY'
  file '/etc/sudoers.d/deploy', owner: 'root:root', template: 'sudoers'

# install rbenv and Ruby 3.1.2
package :install_ruby do
  install_rbenv 'deploy'
  install_ruby 'deploy', '3.1.2', '--with-jemalloc'

You can see a full example in examples/config.rb. You would run that file with bundle exec prepper config.rb to provision the server.

The API documentation can be found on rubydoc:


After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to


Bug reports and pull requests are welcome on GitHub at This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.


The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the Prepper project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.