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#!/usr/bin/env python
import xmlrpclib
import sys
import urllib2
import re
# Scripts resolves current external address of the EC2 server and updates
# the corresponding Gandi Zone A records to point to this ip.
DOMAIN="" # the domain name to update
NAMES=["@", "www"] # A record names to update
API_KEY = '*********' # fill in gandi API key
DRY_RUN = True # Set false to actually modify Zone
api = xmlrpclib.ServerProxy('')
# for testing use this api endpoint
#api = xmlrpclib.ServerProxy('')
# Resolves external ip
def resolve_ip():
# get ip of the EC2 instance
# http://instance-data/latest/meta-data/local-ipv4
# http://instance-data/latest/meta-data/public-ipv4
print "Resolving external IP"
newip = urllib2.urlopen('http://instance-data/latest/meta-data/public-ipv4').read()
# check that we received a valid IP
if not re.match("[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}", newip):
print "ERROR: Invalid ip '%s'" % newip
return newip
# Updates the ip of Zone's A records
def update_ip(newip):
print "Getting domain info for %s" % DOMAIN
info =, DOMAIN)
if "zone_id" not in info:
print "ERROR: Unable to domain info"
print info
zone_id = info['zone_id']
print "Getting records for zone_id: %s " % zone_id
records =, zone_id, 0)
print records
# check if records need updating
for record in records:
if record['type'] == "A" and record['name'] in NAMES:
if record['value'] == newip:
if not NAMES:
print "Records already up to date, nothing to do"
if not DRY_RUN:
print "Updating records: %s" % NAMES
print "Creating new zone version"
version =, zone_id), zone_id, version, { "type" : [ "A", "CNAME"], "name" : NAMES })
for name in NAMES:, zone_id, version, { "type" : "A", "ttl": 3600, "name": name, "value": newip })
print "Activating version: %s" % version, zone_id, version) # set active
print "Records updated"
records =, zone_id, 0)
print records
print "DRY_RUN: no records updated"
newip = resolve_ip()
print "External IP %s" % newip