secure and self contained ruby deployment with multiple load-balanced, boot-persistent and highly available thin servers, and a multi-user rvm environment

etc_monit_conf.d_localhost

set httpd port 2812 and # Monit will run on port 2812
    allow sss:sss123 #set your username and password to loin to your Monit

etc_monit_conf.d_mainserver

# this configuration will kill the child worker processes (_0 and _1) if the master dies/is-killed
# if you stop the master, the workers are also stopped
# TODO: better cpu/mem tuning

check process mainserver
 with pidfile /home/ruby1/sinatra-example/tmp/pids/thin_mainserver.pid
  group appserver
   start program = "/bin/bash -c 'export rvm_path=/home/ruby1/.rvm; . $rvm_path/scripts/rvm; cd /home/ruby1/sinatra-example; $rvm_path/gems/ruby-1.9.2-p320/bin/thin --max-persistent-conns 1024 --timeout 1 -V -p 9999 -P /home/ruby1/sinatra-example/tmp/pids/thin_mainserver.pid -d -R config.ru start'" as uid ruby1
    stop program = "/bin/bash -c 'export rvm_path=/home/ruby1/.rvm; . $rvm_path/scripts/rvm; cd /home/ruby1/sinatra-example; $rvm_path/gems/ruby-1.9.2-p320/bin/thin -P /home/ruby1/sinatra-example/tmp/pids/thin_mainserver.pid stop'" as uid ruby1
     if failed host localhost port 9999 then restart
     if cpu usage > 95% for 3 cycles then restart

check process mainserver_0
 with pidfile /home/ruby1/sinatra-example/tmp/pids/thin_mainserver_0.pid
  group appserver
   start program = "/bin/bash -c 'export rvm_path=/home/ruby1/.rvm; . $rvm_path/scripts/rvm; cd /home/ruby1/sinatra-example; $rvm_path/gems/ruby-1.9.2-p320/bin/thin --max-persistent-conns 1024 --timeout 1 -V -p 10001 -P /home/ruby1/sinatra-example/tmp/pids/thin_mainserver_0.pid -d -R config.ru start'" as uid ruby1
    stop program = "/bin/bash -c 'export rvm_path=/home/ruby1/.rvm; . $rvm_path/scripts/rvm; cd /home/ruby1/sinatra-example; $rvm_path/gems/ruby-1.9.2-p320/bin/thin -P /home/ruby1/sinatra-example/tmp/pids/thin_mainserver_0.pid stop'" as uid ruby1
     if failed host localhost port 10001 then restart
     if cpu usage > 95% for 3 cycles then restart
     depends on mainserver

check process mainserver_1
 with pidfile /home/ruby1/sinatra-example/tmp/pids/thin_mainserver_1.pid
  group appserver
   start program = "/bin/bash -c 'export rvm_path=/home/ruby1/.rvm; . $rvm_path/scripts/rvm; cd /home/ruby1/sinatra-example; $rvm_path/gems/ruby-1.9.2-p320/bin/thin --max-persistent-conns 1024 --timeout 1 -V -p 10002 -P /home/ruby1/sinatra-example/tmp/pids/thin_mainserver_1.pid -d -R config.ru start'" as uid ruby1
    stop program = "/bin/bash -c 'export rvm_path=/home/ruby1/.rvm; . $rvm_path/scripts/rvm; cd /home/ruby1/sinatra-example; $rvm_path/gems/ruby-1.9.2-p320/bin/thin -P /home/ruby1/sinatra-example/tmp/pids/thin_mainserver_1.pid stop'" as uid ruby1
     if failed host localhost port 10002 then restart
     if cpu usage > 95% for 3 cycles then restart
     depends on mainserver

etc_monit_monitrc

set daemon  30

set logfile syslog facility log_daemon

set httpd port 2812

check system localhost
include /etc/monit/conf.d/*

etc_nginx_sites-enabled_2

# Mostly yanked from:
# http://bit.ly/nginx-unicorn-setup

upstream sinatra-example-app {
  # fail_timeout=0 means we always retry an upstream even if it failed
  # to return a good HTTP response (in case the Unicorn master nukes a
  # single worker for timing out).
  #server unix:/tmp/sinatra_example_app.socket fail_timeout=0;
  server 0.0.0.0:9999;
  server 0.0.0.0:10001;
  server 0.0.0.0:10002;
}

server {
  listen 80 default;

  #charset koi8-r;

  root /home/ruby1/sinatra-example/;
  access_log /var/log/nginx/sinatra-example-access.log;
  error_log /var/log/nginx/sinatra-example-error.log;
  rewrite_log on;

  location / {
    proxy_pass http://sinatra-example-app;
    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;

    index index.html index.htm;
  }

  # if the request is for a static resource, nginx should serve it directly
  # and add a far future expires header to it, making the browser
  # cache the resource and navigate faster over the website
 }

rvm_passenger_deployment.sh

#add a project user, later also used for PassengerDefaultUser ruby1
adduser --system --home /home/ruby1 --group --shell /bin/zsh --disabled-login ruby1 --gecos 'Ruby Project 1'

# pre-requisites for ruby 
sudo apt-get install libpcre3-dev build-essential libssl-dev libxml2 libxml2-dev libxslt-dev ncurses-dev
sudo apt-get install libcurl4-openssl-dev
apt-get install ruby1.8-dev ruby1.9-dev

#install rvm
sudo -u ruby1 -H curl -L get.rvm.io | sudo -u ruby1 -H bash
#add [[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm" to your ~/.bashrc

#install ruby 1.9.3
sudo -u ruby1 -H  bash -c "source ~/.bashrc && rvm install 1.9.2"
#set default ruby
sudo -u ruby1 -H  bash -c "source ~/.bashrc && rvm --default --create use 1.9.2"
#installing gems
sudo -u ruby1 -H  bash -c "source ~/.bashrc && gem install pg"
sudo -u ruby1 -H  bash -c "source ~/.bashrc && gem install --verbose rake"
#etc....

sudo adduser --system --no-create-home --disabled-login --disabled-password --group nginx

#install passenger gem
# the real solution to installation of passenger/fastthread gem failing on ubuntu rvm with "failed to build native extension issue
sudo -u ruby1 -H  bash -c "source ~/.bashrc && gem install echoe passenger  --no-ri --no-rdoc"
#permanently add --no-ri --no-rdoc to gemrc
sudo -u ruby1 -H  bash -c "source ~/.bashrc && echo 'gem: --no-rdoc --no-ri' >> ~/.gemrc"


##DEPRECATED ################################################################
#installing nginx with passenger


###env rvm_path=/home/ruby1/.rvm GEM_HOME=/home/ruby1/.rvm/gems/ruby-1.9.2-p320/  /home/ruby1/.rvm/gems/ruby-1.9.2-p320/bin/passenger-install-nginx-module

#i installed nginx to /home/nginx
# change /etc/init.d/nginx lines to 
#PATH=/home/nginx/sbin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
#DAEMON=/home/nginx/sbin/nginx
#add "user nginx" to the top of  /etc/nginx/nginx.conf
####/etc/init.d/nginx start
############################################################################

#installing monit
apt-get install monit
#add relevant monit config files above
#include /etc/monit/conf.d/*
#and change in /etc/default/monit
#startup=1


#installing thin
sudo -u ruby1 -H  bash -c "source ~/.bashrc && gem install eventmachine thin"

#restart thin
service monit start
#restart your thin server (in 30sec)
kill `cat /home/ruby1/sinatra-example/tmp/pids/thin.pid`
#or
/usr/sbin/monit -Ic /etc/monit/monitrc start  mainserver
/usr/sbin/monit -Ic /etc/monit/monitrc stop  mainserver
/usr/sbin/monit -Ic /etc/monit/monitrc restart  mainserver