AWS Elastic Beanstalk environment with multiple Load Balancers

It's a tough one with Elastic Beanstalk as they have a cookie cutter way of deploying your app and if it's not in their options then you have either "hack it" or just go with a completely different solution using EC2 or plain cloud servers.

One thing you can try is creating another ELB with the certificate of the second domain (and subdomains) and point it to your Elastic Beanstalk Instance. If you go to the ELB console you should be able to see the ELB for the first domain. Then, you can create your second domain based on the first domain.

Hope it helps.

To add multiple Elastic Load Balancers (ELB) to an Elastic Beanstalk (EB) application, you need to add the additional ELB to the auto scaling group of the EB app.

On the command line

The easiest way to achieve this is through the AWS CLI (https://aws.amazon.com/cli/):

aws autoscaling attach-load-balancers --auto-scaling-group-name <SG_NAME> --load-balancer-names <ELB_NAME>

In the AWS Console

Of course this can be done in the AWS Console, too:

1. Go to EC2 > Auto Scaling > Auto Scaling Groups
2. select the group you want to add the elb to
3. Select the Details Tab
4. Edit-Button on the top right
5. Use the Autocompletion in the Load Balancers field to add your load balancer
6. Save

For your convenience, you can see where you need to click for all of the 5 steps (don't forget to save!)

For me this works also on eb-generated auto scaling groups (Region: eu-central-1).

This might not have been available at the time of the question, but it is now.