Centos 7, NginX, Puma, Mina

deploy_rails_app.rb

# Deploy
require 'mina/bundler'
require 'mina/rails'
require 'mina/git'
require 'mina/rbenv'

set :rails_env,     'production'
set :deploy_to,     'deploy_location_without_current'
set :app_path,      'app_location'
set :user,          'alif'
set :port,          '22'
set :repository,    'git'
set :forward_agent, true
set :domain,        'ip'
set :branch,        'puma'
set :shared_paths,  ['config/database.yml', 'config/secrets.yml', 'log', 'tmp', 'config/application.yml']

task :environment do
  queue %{
    echo "-----> Loading environment"
    #{echo_cmd %[source ~/.bashrc]}
  }
  invoke :'rbenv:load'
end

task :setup => :environment do
  queue! %[mkdir -p "#{deploy_to}/shared/log"]


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

  queue! %[touch "#{deploy_to}/shared/config/database.yml"]
  queue  %[echo "-----> Be sure to edit 'shared/config/database.yml'."]

  queue! %[touch "#{deploy_to}/shared/config/secrets.yml"]
  queue %[echo "-----> Be sure to edit 'shared/config/secrets.yml'."]

  queue! %[touch "#{deploy_to}/shared/config/application.yml"]
  queue %[echo "-----> Be sure to edit 'shared/config/application.yml'."]

  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"]
end

task deploy: :environment do
  deploy do
    invoke :'git:clone'
    invoke :'deploy:link_shared_paths'
    invoke :'bundle:install'
    invoke :'rails:db_migrate'
    invoke :'rails:assets_precompile'
    invoke :'deploy:cleanup'
    to :launch do
      invoke :'server:restart'
    end
  end
end

namespace :server do
  task start: :environment do
    queue "cd #{app_path} && rails_env=#{rails_env} && bin/puma.sh start"
  end

  task stop: :environment do
    queue "cd #{app_path} && rails_env=#{rails_env} && bin/puma.sh stop"
  end

  task restart: :environment do
    queue "cd #{app_path} && rails_env=#{rails_env} && bin/puma.sh restart"
  end

  task :status do
    queue 'echo "-----> Puma Status"'
    queue "cd #{app_path} && rails_env=#{rails_env} && bin/puma.sh status"
  end
end

# ps aux | grep puma    # Get puma pid
# kill -s SIGUSR2 pid   # Restart puma
# kill -s SIGTERM pid   # Stop puma

----------------------------------------------------------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------------------------------------------------------

# Puma.rb
environment ENV['RAILS_ENV'] || 'production'
workers 2
threads 2,16
preload_app!
daemonize true
pidfile 'tmp/puma.pid'
stdout_redirect 'log/puma.log', 'log/puma.log', true
#stdout_redirect "/home/alif/ozinteractive/shared/tmp/log/stdout", "/home/alif/ozinteractive/shared/tmp/log/stderr", true


bind 'unix://tmp/puma.sock'
state_path 'tmp/puma.state'

# on_worker_boot do |worker_index|
#
#   # write worker pid
#   File.open("tmp/puma_worker_#{worker_index}.pid", "w") { |f| f.puts Process.pid }
#
#   # reconnect to redis
#   Redis.current.client.reconnect
#
#   ActiveSupport.on_load(:active_record) do
#     ActiveRecord::Base.establish_connection
#   end
# end
#
# environment ENV['RAILS_ENV'] || 'production'
# pidfile "/home/alif/ozinteractive/shared/tmp/pids/puma.pid"
# stdout_redirect "/home/alif/ozinteractive/shared/tmp/log/stdout", "/home/alif/ozinteractive/shared/tmp/log/stderr"
# threads 2, 16
# workers 2
# bind "unix:///home/alif/ozinteractive/shared/tmp/sockets/puma.sock"
# daemonize true


----------------------------------------------------------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------------------------------------------------------

# puma.sh

#! /bin/sh

BUNDLE_BIN=/home/alif/.rbenv/shims/bundle
APP_ROOT=/home/alif/ozinteractive
PUMA_CONFIG_FILE=$APP_ROOT/current/config/puma.rb
PUMA_PID_FILE=$APP_ROOT/shared/tmp/puma.pid
PUMA_SOCKET=$APP_ROOT/shared/tmp/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
}

puma_start() {
  rm -f $PUMA_SOCKET
  if [ -e $PUMA_CONFIG_FILE ] ; then
    $BUNDLE_BIN exec puma -C $PUMA_CONFIG_FILE
  else
    $BUNDLE_BIN exec puma
  fi
}

puma_stop() {
  cat $PUMA_PID_FILE | xargs kill -31
  rm -f $PUMA_PID_FILE
  rm -f $PUMA_SOCKET
}

case "$1" in
  start)
    echo "Starting puma..."
    puma_start
    echo "done"
    ;;

  stop)
    echo "Stopping puma..."
    puma_stop
    echo "done"
    ;;

  restart)
    if puma_is_running ; then
      echo "Hot-restarting puma..."
      puma_stop
      puma_start

      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"
    bin/puma.sh start
    ;;

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

----------------------------------------------------------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------------------------------------------------------

# NginX
upstream alif(<< this is your user name ) {
    server unix:///home/alif/ozinteractive/shared/tmp/puma.sock fail_timeout=0;
}


server {
	server_name your ip or domain;
	keepalive_timeout	5;
	root /home/alif/ozinteractive/current/public;

	access_log /var/log/nginx/ozinteractive/access.log;
	error_log /var/log/nginx/ozinteractive/error.log warn;

	location / {
		try_files $uri @app;
	}
	
	location @app {
                proxy_pass              http://alif;
                proxy_redirect  off;

                proxy_set_header   Host             $host;
                proxy_set_header   X-Real-IP        $remote_addr;
                proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;

                client_max_body_size	   10m;
                client_body_buffer_size    128k;

                proxy_connect_timeout	   90;
                proxy_send_timeout         90;
                proxy_read_timeout         90;

                proxy_buffer_size          4k;
                proxy_buffers              4 32k;
                proxy_busy_buffers_size    64k;
                proxy_temp_file_write_size 64k;
        }

	error_page   500 502 503 504  /500.html;

        location = /500.html {
                root /home/alif/ozinteractive/current/public;
        }

	location = /robots.txt {
		alias /home/alif/ozinteractive/current/public/robots.txt;
	}

	location = /favicon.ico {
		alias /home/alif/ozinteractive/current/public/favicon.ico;
	}

	location ~ ^/(assets|images|javascripts|stylesheets|system|favicon\.ico|robots\.txt)/  {
                root /home/alif/ozinteractive/current/public;
                expires max;
                break;
        }

}