https listener creation fails in AWS Elastic Beanstalk

Question

I have developed and deployed a python application to AWS Elastic Beanstalk that works fine. When I modify the application bundle with the addition of the ```.ebextensions/https-reencrypt-alb.config``` file the deployment of the Application fails with the following Error:

```
"Unable to deploy application version: Configuration validation exception: You must specify an SSL certificate to configure a listener to use HTTPS."
```
Contents of ```https-reencrypt-alb.config```
 as follows...

```
aws:elbv2:listener:443:
    DefaultProcess: https
    ListenerEnabled: 'true'
    Protocol: HTTPS
  aws:elasticbeanstalk:environment:process:https:
    Port: '443'
    Protocol: HTTPS
```
I have a certificate created all ready, but creating a listener on port 443 fails (silently, after reporting - Pending create). I assume this is failing because I have not been able to deploy the version with this https termination file included.

I have successfully deployed two previous, and very similar, applications with https support (in June and August) and they work fine. Has something changed in Elastic Beanstalk/Route 53/Certificate Manager since then that requires a different deployment process?

Accepted Answer

Hi There

Do you have a secure listener setup in another config file with an **SSLCertificateID** ARN specified?

From https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/configuring-https-endtoend.html :

First, [add a secure listener to your load balancer](https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/configuring-https-elb.html), if you haven't already.

example:
```
option_settings:
  aws:elb:listener:443:
    SSLCertificateId: arn:aws:acm:us-east-2:1234567890123:certificate/####################################
    ListenerProtocol: HTTPS
    InstancePort: 80
```

https listener creation fails in AWS Elastic Beanstalk

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