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  2. Linking SSL certificates to load balancers on AWS

How do I link SSL certificates to load balancers on AWS?

In this guide, we will link SSL certificates to an AWS load balancer using Pulumi. This involves creating a load balancer, generating an SSL certificate, and attaching the certificate to the load balancer. We will use the aws.elb.LoadBalancer and aws.lightsail.LbCertificateAttachment resources from the Pulumi AWS package.

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

// Create a new SSL certificate
const sslCertificate = new aws.acm.Certificate("sslCertificate", {
    domainName: "example.com",
    validationMethod: "DNS",
});

// Create a new load balancer
const loadBalancer = new aws.elb.LoadBalancer("loadBalancer", {
    availabilityZones: ["us-west-2a"],
    listeners: [
        {
            instancePort: 80,
            instanceProtocol: "HTTP",
            lbPort: 80,
            lbProtocol: "HTTP",
        },
        {
            instancePort: 443,
            instanceProtocol: "HTTPS",
            lbPort: 443,
            lbProtocol: "HTTPS",
            sslCertificateId: sslCertificate.arn,
        },
    ],
    healthCheck: {
        target: "HTTP:80/",
        interval: 30,
        timeout: 5,
        healthyThreshold: 2,
        unhealthyThreshold: 2,
    },
    instances: [],
    securityGroups: [],
});

// Attach the SSL certificate to the load balancer
const lbCertificateAttachment = new aws.lightsail.LbCertificateAttachment("lbCertificateAttachment", {
    lbName: loadBalancer.name,
    certificateName: sslCertificate.domainName,
});

// Export the DNS name of the load balancer
export const loadBalancerDnsName = loadBalancer.dnsName;

Key Points

  • We created an SSL certificate using AWS Certificate Manager (ACM).
  • We created an AWS Elastic Load Balancer (ELB) with both HTTP and HTTPS listeners.
  • We attached the SSL certificate to the load balancer using the aws.lightsail.LbCertificateAttachment resource.
  • The DNS name of the load balancer is exported for use in other parts of your infrastructure.

Summary

In this guide, we demonstrated how to link SSL certificates to an AWS load balancer using Pulumi. We created an SSL certificate, set up a load balancer with HTTP and HTTPS listeners, and attached the SSL certificate to the load balancer. This ensures secure communication over HTTPS for your applications.

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