How do I deploy AWS Amplify with an Application Load Balancer?

In this guide, we will deploy an AWS Amplify application and configure it to use an Application Load Balancer (ALB) using Pulumi. AWS Amplify is a set of tools and services that enables mobile and front-end web developers to build secure, scalable full-stack applications. An Application Load Balancer distributes incoming application traffic across multiple targets, such as EC2 instances, in multiple Availability Zones.

We’ll create the necessary resources including an Amplify app, a load balancer, and configure the load balancer to route traffic to the Amplify app.

Key Points:

• Create an AWS Amplify app.
• Configure an Application Load Balancer.
• Route traffic from the ALB to the Amplify app.

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 this guide, we deployed an AWS Amplify application and configured it to use an Application Load Balancer using Pulumi. We created an Amplify app, set up an Application Load Balancer, and configured the load balancer to route traffic to the Amplify app.

Key Points

• Amplify App: Created an AWS Amplify application.
• Application Load Balancer: Set up an Application Load Balancer to distribute traffic.
• Traffic Routing: Configured the ALB to forward traffic to the Amplify app.

This setup ensures that your Amplify application can handle traffic efficiently and scale as needed.