"elb name longer than 32" but only 8 - aws-cloudformation

Question

I am trying to use AWS cloudformation to create a stack with an ALB and an ECS service, but i get a CREATE_FAILED on the AWS::ECS::Service, which is elb name longer than 32.
I don’t get why the ECS Service is complaining about the ELB name while the ALB itself is in CREATE_COMPLETE status…
Here is the JSON related to the ALB creation i send to cloudformation:
"loadBalancer" : {
"Type": "AWS::ElasticLoadBalancingV2::LoadBalancer",
"Properties": {
"Name": "test-alb",
"Scheme" : "internal",
"Subnets" : [
"subnet-b8217295",
"subnet-ddaad2b8",
"subnet-6d71fb51"
],
"LoadBalancerAttributes" : [
{ "Key" : "idle_timeout.timeout_seconds", "Value" : "50" }
],
"SecurityGroups": [
{ "Ref": "InstanceSecurityGroupOpenWeb" },
{ "Ref" : "InstanceSecurityGroupOpenFull" }
],
"Tags" : [
{ "Key" : "key", "Value" : "value" },
{ "Key" : "key2", "Value" : "value2" }
]
}
}
And here is the JSON related to the ECS Service creation (with a ref to the ALB defining above):
"EcsService": {
"Type":"AWS::ECS::Service",
"Properties":{
"Cluster":{
"Ref": "EcsCluster"
},
"DesiredCount":"1",
"DeploymentConfiguration":{
"MaximumPercent":100,
"MinimumHealthyPercent":0
},
"LoadBalancers": [
{
"ContainerName": "test-web",
"ContainerPort":"80",
"LoadBalancerName":{
"Ref": "loadBalancer"
}
}
],
"Role":{
"Ref": "EcsServiceRole"
},
"TaskDefinition":{
"Ref": "runWebServerTaskDefinition"
}
}
}
And as you can see i set the name of the ALB by myself and it is only 8 characters, so i really don’t get the point, any idea?

Answer 1

When you do "Ref", it would return the Load balancer ARN not the Load balancer name. you need to use GetAtt to get the load balancer name
{ "Fn::GetAtt" : [ "loadBalancer", "LoadBalancerName" ] }