Merge pull request #822 from docker/cross_lb

ecs/awsResources.go

@@ -400,12 +400,24 @@ func (b *ecsAPIService) ensureLoadBalancer(r *awsResources, project *types.Proje
 		// Network Load Balancers do not have associated security groups
 		securityGroups = r.getLoadBalancerSecurityGroups(project)
 	}
+
+	var loadBalancerAttributes []elasticloadbalancingv2.LoadBalancer_LoadBalancerAttribute
+	if balancerType == elbv2.LoadBalancerTypeEnumNetwork {
+		loadBalancerAttributes = append(
+			loadBalancerAttributes,
+			elasticloadbalancingv2.LoadBalancer_LoadBalancerAttribute{
+				Key:   "load_balancing.cross_zone.enabled",
+				Value: "true",
+			})
+	}
+
 	template.Resources["LoadBalancer"] = &elasticloadbalancingv2.LoadBalancer{
 		Scheme:                 elbv2.LoadBalancerSchemeEnumInternetFacing,
 		SecurityGroups:         securityGroups,
 		Subnets:                r.subnetsIDs(),
 		Tags:                   projectTags(project),
 		Type:                   balancerType,
+		LoadBalancerAttributes: loadBalancerAttributes,
 	}
 	r.loadBalancer = cloudformationARNResource{
 		logicalName:  "LoadBalancer",