Turret: a small service to get notified when Redis Sentinel elects a new master

turret.rb

require 'rubygems'
require 'redis'
require 'uri'

uri = URI.parse('redis://127.0.0.1:26379')
REDIS = Redis.new(:host => uri.host, :port => uri.port)

REDIS.psubscribe('*switch-master' ) do |on|
 on.psubscribe do |event, total|
    puts "Subscribed to ##{event} (#{total} subscriptions)"
 end

 on.pmessage do |pattern, event, message|
        puts "received #{message}"
        new_master_ip = message.split[3]
        new_master_port = message.split[3]
        puts "master is now: #{new_master_ip}:#{new_master_port}"
  end

end