# Capistrano-Nginx-Unicorn Capistrano tasks for configuration and management nginx+unicorn combo for zero downtime deployments of Rails applications. Provides capistrano tasks to: * easily add application to nginx and reload it's configuration * create unicorn init script for application, so it will be automatically started when OS restarts * start/stop unicorn (also can be done using `sudo service unicorn_ start/stop`) * reload unicorn using `USR2` signal to load new application version with zero downtime Provides several capistrano variables for easy customization. Also, for full customization, all configs can be copied to the application using generators. ## Installation Add this line to your application's Gemfile: gem 'capistrano-nginx-unicorn', require: false, group: :development And then execute: $ bundle Or install it yourself as: $ gem install capistrano-nginx-unicorn ## Usage Add this line to your `deploy.rb` require 'capistrano-nginx-unicorn' Note, that following capistrano variables should be defined: application current_path shared_path user You can check that new tasks are available (`cap -T`): for nginx: # add and enable application to nginx cap nginx:setup # reload nginx configuration cap nginx:reload and for unicorn: # create unicorn configuration and init script cap unicorn:setup # start unicorn cap unicorn:start # stop unicorn cap unicorn:stop # reload unicorn with no downtime # old workers will process new request until new master is fully loaded # then old workers will be automatically killed and new workers will start processing requests cap unicorn:reload There is no need to execute any of these tasks manually. They will be called automatically on different deploy stages: * `nginx:setup`, `nginx:reload` and `unicorn:setup` are hooked to `deploy:setup` * `unicorn:restart` is hooked to `deploy:restart` This means that if you run `cap deploy:setup`, nginx and unicorn will be automatically configured And after each deploy, unicorn will be automatically reloaded. However, if you changed variables or customized templates, you can run any of these tasks to update configuration. ## Customization ### Using variables You can customize nginx and unicorn configs using capistrano variables: ```ruby # path to customized templates (see below for details) # default value: "config/deploy/templates" set :templates_path, "config/deploy/templates" # server name for nginx, default value: no (will be prompted if not set) # set this to your site name as it is visible from outside # this will allow 1 nginx to serve several sites with different `server_name` set :nginx_server_name, "example.com" # path, where unicorn pid file will be stored # default value: `"#{current_path}/tmp/pids/unicorn.pid"` set :unicorn_pid, "#{current_path}/tmp/pids/unicorn.pid" # path, where unicorn config file will be stored # default value: `"#{shared_path}/config/unicorn.rb"` set :unicorn_config, "#{shared_path}/config/unicorn.rb" # path, where unicorn log file will be stored # default value: `"#{shared_path}/config/unicorn.rb"` set :unicorn_log, "#{shared_path}/config/unicorn.rb" # user name to run unicorn # default value: `user` (user varibale defined in your `deploy.rb`) set :unicorn_user, "user" # number of unicorn workers # default value: no (will be prompted if not set) set :unicorn_workers, 4 # if set, nginx will be configured to 443 port and port 80 will be auto rewritten to 443 # also, on `nginx:setup`, paths to ssl certificate and key will be configured # and certificate file and key will be copied to `/etc/ssl/certs` and `/etc/ssl/private/` directories # default value: false set :nginx_use_ssl, false # remote file name of the certificate, only makes sense if `nginx_use_ssl` is set # default value: `nginx_server_name + ".crt"` set :nginx_ssl_certificate, "#{nginx_server_name}.crt" # remote file name of the certificate, only makes sense if `nginx_use_ssl` is set # default value: `nginx_server_name + ".key"` set :nginx_ssl_certificate_key, "#{nginx_server_name}.key" # local path to file with certificate, only makes sense if `nginx_use_ssl` is set # this file will be copied to remote server # default value: none (will be prompted if not set) set :nginx_ssl_certificate_local_path, "/home/ivalkeen/ssl/myssl.cert" # local path to file with certificate key, only makes sense if `nginx_use_ssl` is set # this file will be copied to remote server # default value: none (will be prompted if not set) set :nginx_ssl_certificate_key_local_path, "/home/ivalkeen/ssl/myssl.key" ``` For example, of you site name is `example.com` and you want to use 8 unicorn workers, your `deploy.rb` will look like this: ```ruby set :server_name, "example.com" set :unicorn_workers, 4 require 'capistrano-nginx-unicorn' ``` ### Template Customization If you want to change default templates, you can generate them using `rails generator` rails g capistrano:nginx_unicorn:config This will copy default templates to `config/deploy/templates` directory, so you can customize them as you like, and capistrano tasks will use this templates instead of default. You can also provide path, where to generate templates: rails g capistrano:nginx_unicorn:config config/templates # TODO: * add tests ## Contributing 1. Fork it 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