moved the failover functionality to failover-haproxy.py, since it is …

…far from complete and contains completely different functionality

failover-haproxy.py

@@ -0,0 +1,38 @@
+import argparse
+import logging
+from haproxy_autoscale import steal_elastic_ip
+import urllib2
+
+def main():
+    # Parse up the command line arguments.
+    parser = argparse.ArgumentParser(description='Update haproxy to use all instances running in a security group.')
+    parser.add_argument('--access-key', required=True)
+    parser.add_argument('--secret-key', required=True)
+    parser.add_argument('--eip',
+                        help='The Elastic IP to bind to when VIP seems unhealthy.')
+    parser.add_argument('--health-check-url',
+                        help='The URL to check. Assigns EIP to self if health check fails.')
+    args = parser.parse_args()
+
+    # Do a health check on the url if specified.
+    try:
+        if args.health_check_url and args.eip:
+            logging.info('Performing health check.')
+            try:
+                logging.info('Checking %s' % args.health_check_url)
+                response = urllib2.urlopen(args.health_check_url)
+                logging.info('Response: %s' % response.read())
+
+            except:
+                # Assign the EIP to self.
+                logging.warn('Health check failed. Assigning %s to self.' % args.eip)
+                steal_elastic_ip(access_key=args.access_key,
+                                 secret_key=args.secret_key,
+                                 ip=args.eip )
+
+    except:
+        pass
+
+if __name__ == '__main__':
+    logging.getLogger().setLevel(logging.INFO)
+    main()