ESKA.GLOBAL Development | Elastic Load Balancing

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.

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Application Load Balancer

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 individual request level (Layer 7), Application Load Balancer routes traffic to targets within Amazon Virtual Private Cloud (Amazon VPC) based on the content of the request.

Network Load Balancer

Network Load Balancer is best suited for load balancing of Transmission Control Protocol (TCP), User Datagram Protocol (UDP) and Transport Layer Security (TLS) traffic where extreme performance is required. 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

Classic Load Balancer provides basic load balancing across multiple Amazon EC2 instances and operates at both the request level and connection level. Classic Load Balancer is intended for applications that were built within the EC2-Classic network.

High availability.Elastic Load Balancing automatically distributes traffic across multiple targets – Amazon EC2 instances, containers and IP addresses – in a single Availability Zone or multiple Availability Zones.

Health checks.Elastic Load Balancing can detect unhealthy targets, stop sending traffic to them, and then spread the load across the remaining healthy targets.

Security features.Use Amazon Virtual Private Cloud (Amazon VPC) to create and manage security groups associated with load balancers to provide additional networking and security options. You can also create an internal (non-internet-facing) load balancer.

TLS termination.Elastic Load Balancing provides integrated certificate management and SSL/TLS decryption, allowing you the flexibility to centrally manage the SSL settings of the load balancer and offload CPU intensive work from your application.

Layer 4 or Layer 7 load balancing.You can load balance HTTP/HTTPS applications for layer 7-specific features, or use strict layer 4 load balancing for applications that rely on the TCP and UDP protocols.

Operational monitoring.Elastic Load Balancing provides integration with Amazon CloudWatch metrics and request tracing in order to monitor performance of your applications in real-time.

- Achieve better fault tolerance for your applications

Elastic Load Balancing provides fault tolerance for your applications by automatically balancing traffic across targets – Amazon EC2 instances, containers, IP addresses, and Lambda functions – in multiple Availability Zones while ensuring only healthy targets receive traffic. If all of your targets in a single Availability Zone are unhealthy, Elastic Load Balancing will route traffic to healthy targets in other Availability Zones.

- Automatically load balance your containerized applications

With enhanced container support for Elastic Load Balancing, you can now load balance across multiple ports on the same Amazon EC2 instance. You can also take advantage of deep integration with the Amazon EC2 Container Service (ECS), which provides a fully-managed container offering. Simply register a service with a load balancer, and ECS transparently manages the registration and de-registration of Docker containers.

- Automatically scale your applications

Elastic Load Balancing provides confidence that your applications will scale to the demands of your customers. With the ability to trigger Auto Scaling for your Amazon EC2 instance fleet when latency of any one of your EC2 instances exceeds a preconfigured threshold, your applications will always be ready to serve the next customer request.

- Using Elastic Load Balancing in your Amazon Virtual Private Cloud (Amazon VPC)

Elastic Load Balancing makes it easy to create an internet-facing entry point into your VPC or to route request traffic between tiers of your application within your VPC. You can assign security groups to your load balancer to control which ports are open to a list of allowed sources. Because Elastic Load Balancing is integrated with your VPC, all of your existing Network Access Control Lists (ACLs) and Routing Tables continue to provide additional network controls.

- Hybrid load balancing with Elastic Load Balancing

Elastic Load Balancing offers ability to load balance across AWS and on-premises resources using the same load balancer. For example, if you need to distribute application traffic across both AWS and on-premises resources, you can achieve this by registering all the resources to the same target group and associating the target group with a load balancer.

- Invoking Lambda functions over HTTP(S)

Elastic Load Balancing supports invoking Lambda functions to serve HTTP(S) requests. This enables users to access serverless applications from any HTTP client, including web browsers. You can register Lambda functions as targets and leverage the support for content-based routing rules in Application Load Balancers to route requests to different Lambda functions. You can use an Application Load Balancer as a common HTTP endpoint for applications that use servers and serverless computing.

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