How to put classic load balancers behind an AWS application load balancer

0
votes

AWS has launched application load balancer which can do path based routing. Is it possible to put classic load balancers behind the application load balancer.

Example: Lets say we have 2 classic load balancers. Application Load Balancer will route traffic to first classic load balancer for all url like application-load-balancer/front* and will route traffic to second classic load balancer for all url like application-load-balancer/backend*

Currently, seems like we can only put hosts behind an application load balancer. Is it possible to put load balancer behind an application load balancer?

1
amazon-web-serviceselastic-load-balancer

1 Answers

2
votes

No, this is not possible.

Both the Classic Load Balancer and the new Application Load Balancer can only point to Amazon EC2 instances.

However, you can achieve exactly what you desire through the use of an Application Load Balancer on its own:

  • Create Target Groups (such as frontend and backend) and add your desired instances to each group -- this is similar to each Classic Load Balancer you wanted to use
  • Create the Application Load Balancer and configure it to point appropriate paths to each Target Group

You can think of the Application Load Balancer as being multiple Classic Load Balancers, each with a different path.