Capun is merely a combination of rails + capistrano3 + unicorn related gems (namely, capistrano-rails, rvm1-capistrano3, capistrano-bundler, capistrano3-unicorn) and a couple of convenient rails generators that help to setup deployment scheme in less than a minute.

###Prerequisites

We expect you to have the following things setup before you run cap staging|production|beta|etc deploy:

• linux server with a ssh user (should be configured as passwordless sudo, see this serverfault.com article for instructions)
• Node.js installed (e.g. sudo apt-get install -y nodejs && sudo ln -sf /usr/bin/nodejs /usr/local/bin/node for Debian 8 Jessie)
• nginx installed in the /etc/nginx directory
• dedicated host (e.g. beta.example.com)
• unicorn gem added to a Gemfile
• rails project pushed to a git repo (you should also setup ssh agent forwarding, see this article for instuctions)

Capun works with Rails 4.0 onwards. You can add it to your Gemfile with:

gem 'capun', group: :development
\#add unicorn as well, as we use it as application server
gem 'unicorn', group: :production

Run the bundle command to install it. After you install Capun, you need to run the generator:

rails generate capun:install

It will ask you about user, server and repo you'd like to use. Add stage to capistrano configurations:

rails generate capun:stage beta

It will ask you about application name for stage selected and application url you'd like to use. Optionally, you can add basic authentication. Now you are ready to make a deploy:

cap beta deploy

Capistrano 3 tasks

If you need to add custom tasks to a deployed application, you can append them to config/deploy.rb file exactly the same way, as you would do with capistrano3.

Uploading files and creating symbolic links

If you like to upload or symlink files to a server, you should add them either to uploads or symlinks array in the config/deploy.rb file:

set :uploads, [
  {what: "config/somefile.rb", where: '#{shared_path}/config/somefile.rb'}
]
set :symlinks, [
  \#when creating a symlink, we assume that source file is located in #{shared_path}/config directory
  {what: "somefile.yml", where: '#{release_path}/config/somefile.yml'}
]

If you upload file with .erb extension, it will be precompiled before upload.

Figaro support

If you use figaro gem, Capun will pick up application.yml file, upload it to #{shared_path}/config/application.yml and symlink to #{release_path}/config/application.yml. No configuration is required.

ELK + logrotate support

If you would like to forward your logs to logstash, you can enable it by answering 'yes' while generating a new stage. As a result, lograge gem and lograge configurations will be added along with logstash confgurations added and symlinked to logstash conf.d directory (which is assumed to be at /etc/logstash/conf.d/). If you answer 'yes' to 'Would you like to add logrotate configuration to stage?' while generating a new stage, logrotate configuration file will be added and symlinked to /etc/logrotate.d/ directory.

1. Fork it ( http://github.com/zamylin/capun/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request