How to Create a Target Group and Associate with Load Balancer

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🤔 What is Target Group? #

A target group tells a load balancer where traffic should be sent, such as to EC2 instances, fixed IP addresses, or AWS Lambda functions. You create one or more listeners and configure listener rules to direct traffic to one target group when creating a load balancer.

Purpose of Target Group #

Take a look at the image below from bottom to top.

1. Our website is hosted on four EC2 instances.
2. We used two Target Groups (Blue Target Group and Green Target Group) to connect a load balancer to four EC2 instances.
3. Assume we have written a Target Group rule as follows:
   • Blue Target Group is listening to port 80 (HTTP request).
   • Green Target Group is listening to port 443 (HTTPs request).
4. If a user sends an HTTP request, the Blue Target Group will listen for it and redirect it to the Instances specified for it.
5. If a user sends an HTTPs request, the Green Target Group will listen for it and redirect it to the Instances specified for it.
6. Congratulations, we now understand what Target Group is all about.

🤔 How to Create a Target Group? #

1. Navigate to the Target Group section and click on the Create Target Group button.
   

   Photo Credit to CodeToFun
2. Include the necessary EC2 instance in the Target Group by clicking on the Include as pending below button.
   

   Photo Credit to CodeToFun

3. Congratulations, you have successfully created a Target Group, but it is not associated with any Load Balancer.
   

   Photo Credit to CodeToFun

4. Learn how to create a load balancer and associated with this target group.

Did You Know?

Did you Know?

Target group allows developers to control how to distribute traffic to multiple versions of their application.

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