title: AWS CDK and creating ECS/Fargate Service on existing ALB. Use existing listener?
body: <p>So, I've been pulling out my hair on this issue.</p>
  <p>I'm trying to create a new Service that's based on an existing ALB and listener that uses TLS/443</p>
  <p>I'm using the CDK Python.</p>
  <p>I'm doing a</p>
  <pre><code>service = ecs_patterns.ApplicationLoadBalancedFargateService(
    self, &quot;a-service&quot;,
  ...
  
  load_balancer=existing_lb
  
  )
  </code></pre>
  <p>putting in all my parameters..... Everytime I do this, it tries to create a new listener on port 80. Even if I try to select my existing listener which is on 443, it errors out and says that existing listener exists and it errors out.</p>
  <p>Any thoughts on how to do this on against an existing SSL listener?</p>