Add multi-region support to Autoscaling

moto/autoscaling/models.py

@@ -1,6 +1,6 @@
 from boto.ec2.blockdevicemapping import BlockDeviceType, BlockDeviceMapping
 from moto.core import BaseBackend
-from moto.ec2 import ec2_backend
+from moto.ec2 import ec2_backends
 
 # http://docs.aws.amazon.com/AutoScaling/latest/DeveloperGuide/AS_Concepts.html#Cooldown
 DEFAULT_COOLDOWN = 300
@@ -8,7 +8,7 @@ DEFAULT_COOLDOWN = 300
 
 class FakeScalingPolicy(object):
     def __init__(self, name, adjustment_type, as_name, scaling_adjustment,
-                 cooldown):
+                 cooldown, autoscaling_backend):
         self.name = name
         self.adjustment_type = adjustment_type
         self.as_name = as_name
@@ -17,14 +17,15 @@ class FakeScalingPolicy(object):
             self.cooldown = cooldown
         else:
             self.cooldown = DEFAULT_COOLDOWN
+        self.autoscaling_backend = autoscaling_backend
 
     def execute(self):
         if self.adjustment_type == 'ExactCapacity':
-            autoscaling_backend.set_desired_capacity(self.as_name, self.scaling_adjustment)
+            self.autoscaling_backend.set_desired_capacity(self.as_name, self.scaling_adjustment)
         elif self.adjustment_type == 'ChangeInCapacity':
-            autoscaling_backend.change_capacity(self.as_name, self.scaling_adjustment)
+            self.autoscaling_backend.change_capacity(self.as_name, self.scaling_adjustment)
         elif self.adjustment_type == 'PercentChangeInCapacity':
-            autoscaling_backend.change_capacity_percent(self.as_name, self.scaling_adjustment)
+            self.autoscaling_backend.change_capacity_percent(self.as_name, self.scaling_adjustment)
 
 
 class FakeLaunchConfiguration(object):
@@ -104,7 +105,7 @@ class FakeAutoScalingGroup(object):
     def __init__(self, name, availability_zones, desired_capacity, max_size,
                  min_size, launch_config_name, vpc_zone_identifier,
                  default_cooldown, health_check_period, health_check_type,
-                 load_balancers, placement_group, termination_policies):
+                 load_balancers, placement_group, termination_policies, autoscaling_backend):
         self.name = name
         self.availability_zones = availability_zones
         self.max_size = max_size
@@ -124,6 +125,8 @@ class FakeAutoScalingGroup(object):
         self.instances = []
         self.set_desired_capacity(desired_capacity)
 
+        self.autoscaling_backend = autoscaling_backend
+
     @classmethod
     def create_from_cloudformation_json(cls, resource_name, cloudformation_json):
         properties = cloudformation_json['Properties']
@@ -182,7 +185,7 @@ class FakeAutoScalingGroup(object):
         if self.desired_capacity > curr_instance_count:
             # Need more instances
             count_needed = self.desired_capacity - curr_instance_count
-            reservation = ec2_backend.add_instances(
+            reservation = autoscaling_backend.ec2_backend.add_instances(
                 self.launch_config.image_id,
                 count_needed,
                 self.launch_config.user_data,
@@ -196,16 +199,22 @@ class FakeAutoScalingGroup(object):
             count_to_remove = curr_instance_count - self.desired_capacity
             instances_to_remove = self.instances[:count_to_remove]
             instance_ids_to_remove = [instance.id for instance in instances_to_remove]
-            ec2_backend.terminate_instances(instance_ids_to_remove)
+            autoscaling_backend.ec2_backend.terminate_instances(instance_ids_to_remove)
             self.instances = self.instances[count_to_remove:]
 
 
 class AutoScalingBackend(BaseBackend):
 
-    def __init__(self):
+    def __init__(self, ec2_backend):
         self.autoscaling_groups = {}
         self.launch_configurations = {}
         self.policies = {}
+        self.ec2_backend = ec2_backend
+
+    def reset(self):
+        ec2_backend = self.ec2_backend
+        self.__dict__ = {}
+        self.__init__(ec2_backend)
 
     def create_launch_configuration(self, name, image_id, key_name,
                                     security_groups, user_data, instance_type,
@@ -267,6 +276,7 @@ class AutoScalingBackend(BaseBackend):
             load_balancers=load_balancers,
             placement_group=placement_group,
             termination_policies=termination_policies,
+            autoscaling_backend=self,
         )
         self.autoscaling_groups[name] = group
         return group
@@ -328,7 +338,7 @@ class AutoScalingBackend(BaseBackend):
     def create_autoscaling_policy(self, name, adjustment_type, as_name,
                                   scaling_adjustment, cooldown):
         policy = FakeScalingPolicy(name, adjustment_type, as_name,
-                                   scaling_adjustment, cooldown)
+                                   scaling_adjustment, cooldown, self)
 
         self.policies[name] = policy
         return policy
@@ -343,4 +353,9 @@ class AutoScalingBackend(BaseBackend):
         policy = self.policies[group_name]
         policy.execute()
 
-autoscaling_backend = AutoScalingBackend()
+
+autoscaling_backends = {}
+for region, ec2_backend in ec2_backends.items():
+    autoscaling_backends[region] = AutoScalingBackend(ec2_backend)
+
+autoscaling_backend = autoscaling_backends['us-east-1']