fix: responseTime should respect import ALB

internal/pkg/deploy/cloudformation/stack/testdata/workloads/svc-manifest.yml

@@ -61,6 +61,8 @@ environments:
         - path: "/"
           allowed_source_ips: ["67.170.82.40/32", "0.0.0.0/0"]
           alias: example.com
+    count:
+      response_time: 2s
     network:
       vpc:
         security_groups:

internal/pkg/deploy/cloudformation/stack/testdata/workloads/svc-test.stack.yml

@@ -337,6 +337,25 @@ Resources: # If a bucket URL is specified, that means the template exists.
         ScaleInCooldown: 120
         ScaleOutCooldown: 150
         TargetValue: 70
+  AutoScalingPolicyALBAverageResponseTime:
+    Type: AWS::ApplicationAutoScaling::ScalingPolicy
+    Properties:
+      PolicyName: !Join ['-', [!Ref WorkloadName, ALBAverageResponseTime, ScalingPolicy]]
+      PolicyType: TargetTrackingScaling
+      ScalingTargetId: !Ref AutoScalingTarget
+      TargetTrackingScalingPolicyConfiguration:
+        CustomizedMetricSpecification:
+          Dimensions:
+            - Name: LoadBalancer
+              Value: mockImportALBName
+            - Name: TargetGroup
+              Value: !GetAtt TargetGroupForImportedALB.TargetGroupFullName
+          MetricName: TargetResponseTime
+          Namespace: AWS/ApplicationELB
+          Statistic: Average
+        ScaleInCooldown: 120
+        ScaleOutCooldown: 60
+        TargetValue: 2
   EnvControllerAction:
     Metadata:
       'aws:copilot:description': "Update your environment's shared resources"

internal/pkg/template/templates/workloads/partials/cf/autoscaling.yml

@@ -400,7 +400,11 @@ AutoScalingPolicyALBAverageResponseTime:
             Value: !GetAtt EnvControllerAction.PublicLoadBalancerFullName
             {{- end}}
           - Name: TargetGroup
+            {{- if $.ImportedALB}}
+            Value: !GetAtt TargetGroupForImportedALB.TargetGroupFullName
+            {{- else}}
             Value: !GetAtt TargetGroup.TargetGroupFullName
+            {{- end}}
         MetricName: TargetResponseTime
         Namespace: AWS/ApplicationELB
         Statistic: Average