ansible-cloud-consul/files/consul_cloud_setup

#!/usr/bin/python

import json
import urllib2
import sys

URL = 'http://169.254.169.254/latest/user-data'

try:
    data = json.load(urllib2.urlopen(URL))
except:
    print >> sys.stderr, 'Was not able to connect to the Amazon API'
    sys.exit(2)

if data['consul_master'] == '127.0.0.1'
    print 'i am the master'