Elastic load balancing developer guide

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elastic load balancing developer guide

Amazon CloudWatch Developer Guide Quotes by Amazon Web Services

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Published 09.03.2019

Elastic Beanstalk Features & Config - Amazon Web Services BASICS

Creating an Application Load Balancer

A load balancer serves as the single point of contact for clients. Clients send requests to the load balancer, and the load balancer sends them to targets, such as EC2 instances, in two or more Availability Zones. To configure your load balancer, you create target groups , and then register targets with your target groups. You also create listeners to check for connection requests from clients, and listener rules to route requests from clients to the targets in one or more target groups. When you create a load balancer, you must specify one public subnet from at least two Availability Zones. You can specify only one public subnet per Availability Zone. Your load balancer uses these IP addresses to establish connections with the targets.

GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Elastic Load Balancing distributes incoming application or network traffic across multiple targets, such as Amazon EC2 instances, containers, and IP addresses, in multiple Availability Zones. Elastic Load Balancing scales your load balancer as traffic to your application changes over time. It can automatically scale to the vast majority of workloads. A load balancer distributes workloads across multiple compute resources, such as virtual servers. Using a load balancer increases the availability and fault tolerance of your applications.

Request Routing

Elastic Load Balancing automatically distributes incoming application traffic across multiple targets, such as Amazon EC2 instances, containers, IP addresses, and Lambda functions. It can handle the varying load of your application traffic in a single Availability Zone or across multiple Availability Zones. Elastic Load Balancing offers three types of load balancers that all feature the high availability, automatic scaling, and robust security necessary to make your applications fault tolerant. Application Load Balancer is best suited for load balancing of HTTP and HTTPS traffic and provides advanced request routing targeted at the delivery of modern application architectures, including microservices and containers. Operating at the connection level Layer 4 , Network Load Balancer routes traffic to targets within Amazon Virtual Private Cloud Amazon VPC and is capable of handling millions of requests per second while maintaining ultra-low latencies. Network Load Balancer is also optimized to handle sudden and volatile traffic patterns. Classic Load Balancer provides basic load balancing across multiple Amazon EC2 instances and operates at both the request level and connection level.

A load balancer accepts incoming traffic from clients and routes requests to its registered targets such as EC2 instances in one or more Availability Zones. The load balancer also monitors the health of its registered targets and ensures that it routes traffic only to healthy targets. When the load balancer detects an unhealthy target, it stops routing traffic to that target. It then resumes routing traffic to that target when it detects that the target is healthy again. You configure your load balancer to accept incoming traffic by specifying one or more listeners.

For example, the DNS name might end with either of the following:. You can create up to 20 load balancers per region per account. You can request an increase for the number of load balancers for your account. CreateLoadBalancer constructor. One or more Availability Zones from the same region as the load balancer. Traffic is equally distributed across all specified Availability Zones. This name must be unique within your AWS account, must have a maximum of 32 characters, must contain only alphanumeric characters or hyphens, and cannot begin or end with a hyphen.


  1. Evan M. says:

    This guide discusses Application Load Balancers.

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