Added an elb_region parameter for interacting with the ec2 elastic load balancer to work with regions other than us-east-1

cloud/ec2_elb

@@ -53,6 +53,11 @@ options:
       - AWS Access API key
     required: false
     default: None
+  elb_region:
+    description:
+      - AWS Region the load balancer is in
+    required: false
+    default: None
 
 """
 
@@ -83,6 +88,7 @@ import os
 
 try:
     import boto
+    from boto.ec2.elb import regions as elb_regions
 except ImportError:
     print "failed=True msg='boto required for this module'"
     sys.exit(1)
@@ -92,12 +98,23 @@ class ElbManager:
     """Handles EC2 instance ELB registration and de-registration"""
 
     def __init__(self, module, instance_id=None, ec2_elbs=None,
-                 ec2_access_key=None, ec2_secret_key=None):
+                 ec2_access_key=None, ec2_secret_key=None, elb_region_name=None):
         self.ec2_access_key = ec2_access_key
         self.ec2_secret_key = ec2_secret_key
         self.module = module
         self.instance_id = instance_id
+        self.elb_region = None
+
+        if elb_region_name is not None:
+          for region in elb_regions():
+            if region.name == elb_region_name:
+              self.elb_region = region
+
+          if self.elb_region is None:
+            self.module.fail_json(msg=str("Invalid region"))
+
         self.lbs = self._get_instance_lbs(ec2_elbs)
+
         # if there are no ELBs to operate on
         # there will be no changes made
         if len(self.lbs) > 0:
@@ -140,7 +157,7 @@ class ElbManager:
                   are attached to self.instance_id"""
 
         try:
-            elb = boto.connect_elb(self.ec2_access_key, self.ec2_secret_key)
+            elb = boto.connect_elb(self.ec2_access_key, self.ec2_secret_key, region=self.elb_region)
         except boto.exception.NoAuthHandlerFound, e:
             self.module.fail_json(msg=str(e))
         elbs = elb.get_all_load_balancers()
@@ -165,13 +182,15 @@ def main():
             instance_id={'required': True},
             ec2_elbs={'default': None, 'required': False},
             ec2_secret_key={'default': None, 'aliases': ['EC2_SECRET_KEY']},
-            ec2_access_key={'default': None, 'aliases': ['EC2_ACCESS_KEY']}
+            ec2_access_key={'default': None, 'aliases': ['EC2_ACCESS_KEY']},
+            elb_region={'required': False, 'default': None}
         )
     )
 
     ec2_secret_key = module.params['ec2_secret_key']
     ec2_access_key = module.params['ec2_access_key']
     ec2_elbs = module.params['ec2_elbs']
+    elb_region = module.params['elb_region']
 
     if module.params['state'] == 'present' and 'ec2_elbs' not in module.params:
         module.fail_json(msg="ELBs are required for registration")
@@ -183,7 +202,7 @@ def main():
 
     instance_id = module.params['instance_id']
     elb_man = ElbManager(module, instance_id, ec2_elbs, ec2_access_key,
-                         ec2_secret_key)
+                         ec2_secret_key, elb_region)
 
     if module.params['state'] == 'present':
         elb_man.register()