Deploying Rails Applications With Mina

Deploy, Mina, Rails, Server, Ubuntu
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I recently participated on StartupDEV Rumble with my friend Raphael Costa. Where we had to develop and deploy a web application in 48 hours.

Besides being an awesome experience I learned a new deployment tool which is really awesome: Mina.

Mina is an awesome tool that deploys your application blazingly fast, over a single ssh connection.

The first thing you have to do is set-up your VPS which should be easy enough, there are plenty of guides around.

I just wanna share my Mina configuration for now.

First, add mina to your gemfile:

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gem 'mina'

Then create a file on config/ folder call it deploy.rb with these contents (watch for CAPS for where you have to change).

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require 'mina/bundler'
require 'mina/rails'
require 'mina/git'

# Basic settings:
# domain     - The hostname to SSH to
# deploy_to  - Path to deploy into
# repository - Git repo to clone from (needed by mina/git)
# user       - Username in the  server to SSH to (optional)

set :shared_paths, [
  'config/database.yml',
  'config/settings/production.yml',
  'log/production.log',
  'log/unicorn.log',
  'public/system',
  'public/uploads'
]

set :domain, 'YOUR_APP_DOMAIN'
set :deploy_to, 'YOUR_APP_FOLDER'
set :repository, 'YOUR_GIT_REPO'
set :user, 'deployer'

desc "Deploys the current version to the server."
task :deploy do
  deploy do
    # Put things that will set up an empty directory into a fully set-up
    # instance of your project.
    invoke :'git:clone'
    invoke :'deploy:link_shared_paths'
    invoke :'bundle:install'
    invoke :'rails:db_migrate'
    invoke :'rails:assets_precompile'

    to :launch do
      # WATCH HERE FOR YOUR UNICORN/SERVER service
      queue 'touch tmp/restart.txt'
      queue 'service unicorn restart'
    end
  end
end

desc "Shows logs."
task :logs do
  queue %[cd #{deploy_to!} && tail -f shared/log/production.log]
end

And really, that’s all there’s to it, I might post a full deploy guide soon if someone ask for it.

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