Book Image

Amazon Web Services Bootcamp

Book Image

Amazon Web Services Bootcamp

Overview of this book

AWS is at the forefront of Cloud Computing today. Businesses are adopting AWS Cloud because of its reliability, versatility, and flexible design. The main focus of this book is teaching you how to build and manage highly reliable and scalable applications and services on AWS. It will provide you with all the necessary skills to design, deploy, and manage your applications and services on the AWS cloud platform. We’ll start by exploring Amazon S3, EC2, and so on to get you well-versed with core Amazon services. Moving on, we’ll teach you how to design and deploy highly scalable and optimized workloads. You’ll also discover easy-to-follow, hands-on steps, tips, and recommendations throughout the book and get to know essential security and troubleshooting concepts. By the end of the book, you’ll be able to create a highly secure, fault tolerant, and scalable environment for your applications to run on.
Table of Contents (16 chapters)

Elastic Load Balancer


Elastic Load Balancer (ELB) is a service that distributes user requests to multiple EC2 instances. By distributing the load, we ensure that our EC2 instances are properly utilized and share the same amount of load between different instances, so that no single instance is over-utilized or under-utilized. We can attach an EC2 instance to the load balancer as and when required. The ELB health check feature monitors the EC2 instance to check that application is up and running so that it can route requests. If the health check fails, ELB marks the EC2 instance as out-of-service so those new requests are not routed to those instances.

For high-availability applications, ELB can be associated with the Auto Scaling group, which can attach a new instance in the event of heavy traffic or remove the instance in the event of failure or low traffic. The auto-scaling group registers the new instance to be added in ELB or is used to remove any instance from ELB.

There are three types...