Codeship Status Code Climate RubyDocs

Penthouse is an alternative to the excellent Apartment gem – however Penthouse is more of a framework for multi-tenancy than a library, in that it provides less out-of-the-box functionality, but should make for easier customisation.


Add this line to your application's Gemfile:

gem 'penthouse'

Basic Usage

If you're using Rails, you just need to configure an initializer at config/initializers/penthouse.rb

require 'penthouse'
# include the standard Rack app
require 'penthouse/app'
# require the relevant router/runner you wish to use
require 'penthouse/routers/subdomain_router'
require 'penthouse/runners/schema_runner'

Penthouse.configure do |config|
  config.router = Penthouse::Routers::SubdomainRouter
  config.runner = Penthouse::Runners::SchemaRunner
  # enhance migrations to migrate all tenants
  config.migrate_tenants = true
  # setup a proc which will return the tenants
  config.tenants = do
    Account.each_with_object({}) do |, result|
      result.merge!(.slug => )

Rails.application.config.middleware.use Penthouse::App

It's advised that if you want to customise these classes, you do so by sub-classing Penthouse::App, Penthouse::Routers::BaseRouter and/or Penthouse::Runners::BaseRunner within this initializer.

Octopus (shard) Usage

If you want to have multiple databases on isolated hardware, you'll need to use the Octopus tenant types. In addition to the above initializer you'll need to configure Octopus:

require 'octopus'

Octopus.setup do |config|
  config.environments = [Rails.env]


If you are using ActiveJob, you'll need to create an active_job.rb initializer:

require 'penthouse/active_job'

class ActiveJob::Base
  include Penthouse::ActiveJob


If you are using Sidekiq, you simply need to include the Penthouse module, this can be done in the penthouse.rb initializer:

require 'penthouse/sidekiq'


  • Router – this class receives a Rack request object and returns an identifier (just a string or symbol) for the tenant.
  • Runner – this class receives the identifier (either from the router or manually switching), then looks up the tenant instance and runs the code within it.


Bug reports and pull requests are welcome on GitHub at