Deploying with Capistrano via a gateway - some notes

Some notes on setting up a gateway server for deploying via Capistrano that I couldn't find at the source.

• You can specify the user you want to use to login to your gateway server like so: set :gateway, 'deploy@deploy.example.com'. This logs in to your gateway server as the "deploy" user.
• You can specify an alternate SSH port for both your gateway and your deployment servers. E.g. setting ssh_options[:port] = 11111 will make Capistrano SSH to your gateway server with on port 11111. For your actual application (and web and database) servers, you can specify the SSH port like so:

  set :gateway, 'deploy@deploy.example.com'
  role :app, '192.168.1.113:22222'
  role :web, '192.168.1.113:22222'
  role :db,  '192.168.1.113:22222', :primary => true

• If you're using public key authentication, you should put the public keys of your users (those who be deploying your app) on the gateway server and on the actual servers. I thought Capistrano would use the key of the "deploy" user but nope.