elb-load-balancing

ELB Application Load Balancers

Key	Value
Services	ELB, Lambda
Integrations	Serverless Framework
Categories	Networking; Serverless

Introduction

A demo application illustrating ELBv2 Application Load Balancers using LocalStack, deployed via the Serverless framework. The sample deploys Lambda functions behind an Application Load Balancer and demonstrates HTTP invocations through the ELB endpoints.

Prerequisites

• A valid LocalStack for AWS license. Your license provides a LOCALSTACK_AUTH_TOKEN to activate LocalStack.
• Docker
• localstack CLI
• Node.js with npm
• Serverless Framework

Check prerequisites

make check

Installation

make install

Start LocalStack

export LOCALSTACK_AUTH_TOKEN=<your-auth-token>
make start

Run the application

make run

The script deploys the Serverless application and invokes the Lambda functions via ELB endpoints /hello1 and /hello2.

You should see output similar to:

> sls deploy --stage local
...
Serverless app successfully deployed. Now trying to invoke the Lambda functions via ELB endpoint.
...
Invoking endpoint 1: http://lb-test-1.elb.localhost.localstack.cloud:4566/hello1
"Hello 1"
Invoking endpoint 2: http://lb-test-1.elb.localhost.localstack.cloud:4566/hello2
"Hello 2"

License

This code is available under the Apache 2.0 license.