What is an Application Load Balancer, and how does it work?
Elastic Load Balancing spreads your incoming traffic over many targets in one or more Availability Zones, such as EC2 instances, containers, and IP addresses. It keeps track of the health of its registered targets and only sends traffic to those who are in good shape. Elastic Load Balancing allows you to scale your load balancer as your incoming traffic fluctuates. It can scale to the vast majority of workloads automatically. To get advanced knowledge in AWS, join FITA Academy’s AWS Online Training with Placement Assistance.
Application Load Balancers, Network Load Balancers, Gateway Load Balancers, and Classic Load Balancers are all supported by Elastic Load Balancing. You can choose the load balancer that best meets your requirements. Application Load Balancers are discussed in this guide. See the User Guide for Network Load Balancers, the User Guide for Gateway Load Balancers, and the User Guide for Classic Load Balancers for further information on the other load balancers.
Components of an AWS Application Load Balancer
Clients communicate with a load balancer through a single point of contact. Incoming application traffic is distributed over various targets, such as EC2 instances, across multiple Availability Zones by the load balancer. This improves your application’s availability. To your load balancer, you add one or more listeners.
A listener monitors for client connection requests using the protocol and port that you specify. The load balancer routes requests to its registered targets according to the rules you provide for a listener. A priority, one or more actions, and one or more conditions make up each rule. When a rule’s criteria are met, the rule’s actions are carried out. For each listener, you must set a default rule, and you can optionally define additional rules.
Using the protocol and port number that you define, each target group routes requests to one or more registered targets, such as EC2 instances. A target can be registered with numerous target groups. You can set up health checks for each target group separately. All targets registered to a target group provided in a listener rule for your load balancer are subjected to health checks. AWS Training in Coimbatore at FITA Academy enhances your technical skills in AWS field.
Overview of the Application Load Balancer
The application layer, the seventh layer of the Open Systems Interconnection (OSI) model, is where an Application Load Balancer works. After receiving a request, the load balancer prioritizes the listener rules to choose which rule to apply, and then selects a target from the target group for the rule action. Listener rules can be set up to send requests to different target groups depending on the content of the application traffic. Even when a target is registered with multiple target groups, routing is done independently for each target group. At the target group level, you can change the routing algorithm. Round robin is the default routing strategy; however, you can choose the least outstanding requests routing technique.
As your needs change, you can add and delete targets from your load balancer without interrupting the general flow of requests to your application. Elastic Load Balancing allows you to scale your load balancer as your application’s traffic changes over time. Elastic Load Balancing can automatically scale to the vast majority of workloads.
You can set up health checks to monitor the health of the registered targets so that the load balancer only sends requests to the targets that are healthy.
Conclusion
We hope that this article has helped you better understand the application load balancer AWS. Join FITA Academy for the best AWS Training in Chennai to learn and work as an AWS Developer. Their mentors have decades of expertise working with Amazon Web Services.
