How Do I Deploy AWS Amplify With an Application Load Balancer?

Introduction

This guide provides a step-by-step approach to deploying an AWS Amplify application and configuring it with an Application Load Balancer (ALB) using Pulumi. AWS Amplify offers a comprehensive set of tools for developers to build secure and scalable full-stack applications. An ALB helps distribute incoming application traffic across multiple targets, enhancing availability and reliability.

Step-by-Step Guide

1. Create an AWS Amplify App: Begin by setting up your Amplify application. This involves specifying the repository and environment variables necessary for your app.

2. Set Up an Application Load Balancer: Next, create an Application Load Balancer to manage and distribute incoming traffic. Ensure you define the security groups and subnets to use.

3. Configure a Target Group: Establish a target group for the ALB, which specifies the instances that will handle the traffic.

4. Create a Listener: Implement a listener for the ALB to forward traffic to the target group, ensuring that the traffic is routed correctly.

5. Export the Amplify App URL: Finally, export the default domain of your Amplify app to access it externally.

import * as pulumi from "@pulumi/pulumi";
import * as aws from "@pulumi/aws";

// Create an Amplify App
const amplifyApp = new aws.amplify.App("myAmplifyApp", {
    name: "myAmplifyApp",
    repository: "https://github.com/my-repo/my-amplify-app",
    oauthToken: "my-oauth-token",
    environmentVariables: {
        "AMPLIFY_MONOREPO_APP_ROOT": "packages/frontend",
    },
});

// Create an Application Load Balancer
const alb = new aws.lb.LoadBalancer("myLoadBalancer", {
    internal: false,
    loadBalancerType: "application",
    securityGroups: ["sg-123456"],
    subnets: ["subnet-123456", "subnet-654321"],
});

// Create a Target Group for the ALB
const targetGroup = new aws.lb.TargetGroup("myTargetGroup", {
    port: 80,
    protocol: "HTTP",
    targetType: "instance",
    vpcId: "vpc-123456",
});

// Create a Listener for the ALB
const listener = new aws.lb.Listener("myListener", {
    loadBalancerArn: alb.arn,
    port: 80,
    defaultActions: [{
        type: "forward",
        targetGroupArn: targetGroup.arn,
    }],
});

// Export the Amplify App URL
export const amplifyAppUrl = amplifyApp.defaultDomain;

Summary

In conclusion, this guide demonstrated how to deploy an AWS Amplify application with an Application Load Balancer using Pulumi. By following the outlined steps, you can efficiently distribute traffic to your Amplify app, ensuring scalability and reliability.

Key Points

• Amplify App: Successfully created an AWS Amplify application.
• Application Load Balancer: Configured an ALB to manage traffic distribution.
• Traffic Routing: Ensured the ALB forwards traffic to the Amplify app effectively.

This configuration helps your application handle traffic efficiently and scale according to demand.