Nginx+Unicorn+Rails+Capistrano 用の設定の雛形

0-README.md

Ubuntu+Nginx+Unicorn+Rails+Capistrano — Gist

この記事から設定を例として抽出
定義更新する

deploy.rb

# -*- coding: utf-8 -*-

# deploy 時に自動で bundle install
require 'bundler/capistrano'

# deploy 時に自動で rake assets:precompile
load 'deploy/assets'

# アプリケーションの設定
set :application, 'app'
set :domain, 'app.com'
set :rails_env, 'production'

set :repository, 'file://.'
set :branch, 'production'

set :deploy_via, :copy
set :deploy_to, '/var/www/app'
set :use_sudo, false

server domain, :app, :web

# 再起動後に古い releases を cleanup
after 'deploy:restart', 'deploy:cleanup'

# Unicorn 用の設定
set :unicorn_config, "#{current_path}/config/unicorn.rb"
set :unicorn_bin, 'unicorn'
set :unicorn_pid, '/tmp/unicorn.app.pid'

# Unicorn 用のデーモン操作タスク
def remote_file_exists?(full_path)
  capture("if [ -e #{full_path} ]; then echo 'true'; fi").strip == 'true'
end

def process_exists?(pid_file)
  capture("ps -p `cat #{pid_file}`; true").strip.split("\n").size == 2
end

namespace :deploy do
  desc 'Start Unicorn'
  task :start, roles: :app, except: {no_release: true} do
    if remote_file_exists? unicorn_pid
      if process_exists? unicorn_pid
        logger.important 'Unicorn is already running!', 'Unicorn'
        next
      else
        run "rm #{unicorn_pid}"
      end
    end

    logger.important 'Starting Unicorn...', 'Unicorn'
    run "cd #{current_path} && bundle exec unicorn -c #{unicorn_config} -E #{rails_env} -D"
  end

  desc 'Stop Unicorn'
  task :stop, :roles => :app, :except => {:no_release => true} do
    if remote_file_exists? unicorn_pid
      if process_exists? unicorn_pid
        logger.important 'Stopping Unicorn...', 'Unicorn'
        run "kill -s QUIT `cat #{unicorn_pid}`"
      else
        run "rm #{unicorn_pid}"
        logger.important 'Unicorn is not running.', 'Unicorn'
      end
    else
      logger.important 'No PIDs found. Check if unicorn is running.', 'Unicorn'
    end
  end

  desc 'Reload Unicorn'
  task :reload, :roles => :app, :except => {:no_release => true} do
    if remote_file_exists? unicorn_pid
      logger.important 'Reloading Unicorn...', 'Unicorn'
      run "kill -s HUP `cat #{unicorn_pid}`"
    else
      logger.important 'No PIDs found. Starting Unicorn...', 'Unicorn'
      run "cd #{current_path} && bundle exec unicorn -c #{unicorn_config} -E #{rails_env} -D"
    end
  end

  desc 'Restart Unicorn'
  task :restart, :roles => :app, :except => {:no_release => true} do
    stop
    start
  end
end

nginx.conf

upstream unicorn.app.com {
    server unix:/tmp/unicorn.app.sock;
}

server {
    listen 80;
    server_name app.com;
    root /var/www/app/current/public;

    access_log /var/log/nginx/app.access.log;
    error_log /var/log/nginx/app.error.log;

    location / {
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host $http_host;
        proxy_pass http://unicorn.app.com;
    }

    location = /favicon.ico {
    }

    location = /robots.txt {
    }

    location ~ ^/(assets|images|javascripts|stylesheets|system)/ {
        gzip_static on;
        expires     max;
        add_header  Cache-Control public;
    }
}

unicorn.rb

# -*- coding: utf-8 -*-

worker_processes 3

listen '/tmp/unicorn.app.sock'

pid '/tmp/unicorn.app.pid'

stderr_path 'log/unicorn.log'
stdout_path 'log/unicorn.log'