Deply Rails App with Puma and Nginx via Mina

deploy.rb

require 'mina/bundler'
require 'mina/rails'
require 'mina/git'
require 'mina/rvm'    # for rvm support. (http://rvm.io)

set :domain, 'esdb.cn'
set :identity_file, '/User/somebody/.ssh/somebody.pem'
set :deploy_to, '/home/ubuntu/apps/xxx.com'
set :repository, 'ssh://git@bitbucket.org/somebody/xxx.com.git'
set :branch, 'master'
set :term_mode, :system

set :shared_paths, ['config/mongoid.yml', 'config/application.yml', 'log']
set :app_path, lambda { "#{deploy_to}/#{current_path}" }
set :stage, 'production'

task :environment do
  invoke :'rvm:use[ruby-2.0.0-p247@xxx_com]'
end

task :setup => :environment do
  queue! %[mkdir -p "#{deploy_to}/shared/log"]
  queue! %[chmod g+rx,u+rwx "#{deploy_to}/shared/log"]

  queue! %[mkdir -p "#{deploy_to}/shared/config"]
  queue! %[chmod g+rx,u+rwx "#{deploy_to}/shared/config"]

  queue! %[mkdir -p "#{deploy_to}/shared/tmp/pids"]
  queue! %[chmod g+rx,u+rwx "#{deploy_to}/shared/tmp"]
  queue! %[chmod g+rx,u+rwx "#{deploy_to}/shared/tmp/pids"]

  queue! %[mkdir -p "#{deploy_to}/shared/tmp/sockets"]
  queue! %[chmod g+rx,u+rwx "#{deploy_to}/shared/tmp/sockets"]

  queue! %[touch "#{deploy_to}/shared/config/mongoid.yml"]
  queue! %[touch "#{deploy_to}/shared/config/application.yml"]
end

desc "Deploys the current version to the server."
task :deploy => :environment do
  deploy do
    invoke :'git:clone'
    invoke :'deploy:link_shared_paths'
    invoke :'bundle:install'
    invoke :'rails:assets_precompile'

    to :launch do
      invoke 'puma:restart'
    end
  end
end
 
namespace :puma do
  desc "Start the application"
  task :start do
    queue 'echo "-----> Start Puma"'
    queue "cd #{current_path} && RAILS_ENV=#{stage} && bin/puma.sh start", :pty => false
  end
 
  desc "Stop the application"
  task :stop do
    queue 'echo "-----> Stop Puma"'
    queue "cd #{current_path} && RAILS_ENV=#{stage} && bin/puma.sh stop"
  end
 
  desc "Restart the application"
  task :restart, :roles => :app, :except => { :no_release => true } do
    queue 'echo "-----> Restart Puma"'
    queue "cd #{current_path} && RAILS_ENV=#{stage} && bin/puma.sh restart"
  end
end

nginx.conf

user ubuntu;
worker_processes  1;

error_log  /var/log/nginx/error.log;
pid        /var/run/nginx.pid;

events {
    worker_connections  1024;
    accept_mutex off;
    use epoll;
}


http {
    include       mime.types;
    default_type  application/octet-stream;

    access_log  /var/log/nginx/access.log;

    sendfile        on;
    tcp_nopush      on;
    tcp_nodelay     off;

    keepalive_timeout  45;

    gzip  on;
    gzip_http_version 1.0;
    gzip_proxied any;
    gzip_min_length 500;
    gzip_disable "MSIE [1-6]\.";
    gzip_types text/plain text/xml text/css
               text/comma-separated-values
               text/javascript application/x-javascript
               application/atom+xml;

    server_names_hash_bucket_size 128;

    client_max_body_size 4G;
    client_body_buffer_size 128k;

    include /etc/nginx/conf/conf.d/*.conf;
}

puma.rb

#!/usr/bin/env puma

environment ENV['RAILS_ENV'] || 'production'

daemonize true

pidfile "/home/ubuntu/apps/esdb.cn/shared/tmp/pids/puma.pid"
stdout_redirect "/home/ubuntu/apps/esdb.cn/shared/tmp/log/stdout", "/home/ubuntu/apps/esdb.cn/shared/tmp/log/stderr"

threads 0, 16

bind "unix:///home/ubuntu/apps/esdb.cn/shared/tmp/sockets/puma.sock"

puma.sh

#! /bin/sh

PUMA_CONFIG_FILE=/home/somebody/apps/xxx.com/config/puma.rb
PUMA_PID_FILE=/home/somebody/apps/xxx.com/shared/tmp/pids/puma.pid
PUMA_SOCKET=/home/somebody/apps/xxx.com/shared/tmp/sockets/puma.sock

# check if puma process is running
puma_is_running() {
  if [ -S $PUMA_SOCKET ] ; then
    if [ -e $PUMA_PID_FILE ] ; then
      if cat $PUMA_PID_FILE | xargs pgrep -P > /dev/null ; then
        return 0
      else
        echo "No puma process found"
      fi
    else
      echo "No puma pid file found"
    fi
  else
    echo "No puma socket found"
  fi

  return 1
}

case "$1" in
  start)
    echo "Starting puma..."
      rm -f $PUMA_SOCKET
      if [ -e $PUMA_CONFIG_FILE ] ; then
        bundle exec puma -C $PUMA_CONFIG_FILE
      else
        bundle exec puma
      fi

    echo "done"
    ;;

  stop)
    echo "Stopping puma..."
      kill -s SIGTERM `cat $PUMA_PID_FILE`
      rm -f $PUMA_PID_FILE
      rm -f $PUMA_SOCKET

    echo "done"
    ;;

  restart)
    if puma_is_running ; then
      echo "Hot-restarting puma..."
      kill -s SIGUSR2 `cat $PUMA_PID_FILE`

      echo "Doublechecking the process restart..."
      sleep 5
      if puma_is_running ; then
        echo "done"
        exit 0
      else
        echo "Puma restart failed :/"
      fi
    fi

    echo "Trying cold reboot"
    script/puma.sh start
    ;;

  *)
    echo "Usage: script/puma.sh {start|stop|restart}" >&2
    ;;
esac