Elastic Load Balancing

• It automatically distributes your incoming traffic across multiple targets, such as EC2 instances, containers, and IP addresses, in one or more Availability Zones.

• It monitors the health of its registered targets, and routes traffic only to the healthy targets.

• It also scales your load balancer as your incoming traffic changes over time.

• With ALBs and NLBs, you register targets in target groups, and route traffic to the target groups.

• With CLBs, you register instances with the load balancer.

• With CLBs and ALBs, you get a default DNS name.

  • This DNS name includes the name of the AWS Region in which the load balancer is created.

  • For example, it looks something like this: load-balancer-name-1234567890.us-west-2.elb.amazonaws.com.

  • To access the website on your instances, you paste this DNS name into the address field of a web browser.

  • However, with NLBs, you can use static IP addresses instead.