gistfile1.rb

#!/bin/env ruby
#
# Copyright (c) 2007-2012 RightScale, Inc, All Rights Reserved Worldwide.
#

# Contacts and configures an HAProxy server for user with a generic apache appli                                                                                                                               cation
# LB_APPLISTENER_NAME -- specifies which HAProxy server pool to use
# LB_BACKEND_NAME -- A unique name for each back end e.g. (AMI_INSTANCE_ID)
# MAX_CONN_PER_SERVER -- Maximum number of connections per server
# HEALTH_CHECK_URI --

require 'yaml'
require 'resolv'

#Temporary, require. These will be automatically passed in soon.
#require '/var/spool/ec2/meta-data.rb'
os_info=`cat /etc/redhat-release`
if os_info =~ /ubuntu/
  ENV['RS_DISTRO']="ubuntu"
  apache="apache"
  ubuntu = true
  centos = false
elsif os_info =~ /centos/
  ENV['RS_DISTRO']="centos"
  apache="httpd"
  centos = true
  ubuntu = false
end

#Escape the 4 problematic shell characters: ", $, `, and \ to get through the ss                                                                                                                               h command correctly
def shell_escape(string)
  return string.gsub(/\\/,"\\\\\\").gsub(/\"/,"\\\"").gsub(/\$/,"\\\$").gsub(/\`                                                                                                                               /,"\\\\\`")
end

# Connect server machine to load balancer to start receiving traffic
applistener  = ENV['mysql']
backend_name = ENV['`hostname`']

# Set the default port for the application server.
port="3306"

# Internal IP
this_backend = ENV['EC2_LOCAL_IPV4']

# Use cookies?
sess_sticky = "#{ENV['OPT_SESSION_STICKINESS']}".downcase
if(sess_sticky && sess_sticky.match(/^(true|yes|on)$/))
  cookie_options = "-c #{ENV['EC2_INSTANCE_ID']}"
end

# How many conns do we tell the LB to bring to the AJP port?
max_conn_per_svr = ENV['MAX_CONN_PER_SERVER']

puts ">>>>>>>Attaching app to host $(hostname) <<<<<<<<<<<<<<"

# Using the default config file...no cookie persistence...and health checks
# /opt/rightscale/lb/bin/haproxy_config_server.rb  -a add -w -l $LB_APPLISTENER                                                                                                                                -s
# $LB_BACKEND_NAME -t $BACKEND_TARGET -k on -e "inter 3000 rise 2 fall 3 maxconn                                                                                                                                3"
sshcmd = "ssh -o StrictHostKeyChecking=no -o PasswordAuthentication=no root@192.                                                                                                                               168.7.100"
cfg_cmd="/root/lb/bin/haproxy_config_server.rb"

server_ip=`hostname -I`
server_name=`hostname`
service="mysql"

server_name = server_name.strip
server_ip = server_ip.strip

args= "-a add -w -l #{service} -s #{server_name} -t \"#{server_ip}\":#{port} -e                                                                                                                                \"inter 3000 rise 2 fall 3 maxconn 1\" "


res=`#{sshcmd} #{cfg_cmd} #{shell_escape(args)}`
puts res #for debugging...

if $? != 0
  puts "Error performing action: #{res}"
  exit(-1)
end