Expose ASG parameters

top.yaml

@@ -20,7 +20,15 @@ Parameters:
   InstanceType:
     Type: String
     Default: "t3.micro"
-
+  AsgMinSize:
+    Type: Number
+    Default: 0
+  AsgMaxSize:
+    Type: Number
+    Default: 1
+  AsgDesiredCapacity:
+    Type: Number
+    Default: 1
 Resources:
   EcsCluster:
     Type: AWS::ECS::Cluster
@@ -117,9 +125,9 @@ Resources:
     Properties:
         VPCZoneIdentifier: !Ref SubnetIds
         LaunchConfigurationName: !Ref EcsInstanceLc
-        MinSize: 0
-        MaxSize: 1
-        DesiredCapacity: 1
+        MinSize: !Ref AsgMinSize
+        MaxSize: !Ref AsgMaxSize
+        DesiredCapacity: !Ref AsgDesiredCapacity
         Tags:
         - Key: Name
           Value: !Sub "${Project}-ECS-ASG-${Environment}"