Automate AWS Load Balancer Provisioning for Kubernetes Ingress

Introduction

In this guide, we will automate the provisioning of an AWS Load Balancer for Kubernetes Ingress using Pulumi. This involves creating an AWS Elastic Load Balancer (ELB) and configuring it to work with Kubernetes Ingress resources.

Step-by-Step Explanation

Step 1: Set Up Pulumi Project

1. Initialize a new Pulumi project using TypeScript.
2. Install necessary Pulumi packages for AWS and Kubernetes.

Step 2: Create AWS Resources

1. Provision an AWS Elastic Load Balancer (ELB).
2. Configure security groups and subnets for the ELB.

Step 3: Configure Kubernetes Ingress

1. Define Kubernetes Ingress resources.
2. Link the Ingress resources to the AWS ELB.

Step 4: Deploy the Stack

1. Use pulumi up to deploy the stack.
2. Verify the ELB and Ingress configuration.

Summary

By following these steps, you will have an automated setup for provisioning an AWS Load Balancer for Kubernetes Ingress using Pulumi. This setup ensures that your Kubernetes services are accessible via the ELB, providing a robust and scalable solution for managing ingress traffic.

Full Code Example

import * as pulumi from "@pulumi/pulumi";
import * as aws from "@pulumi/aws";
import * as k8s from "@pulumi/kubernetes";

// Create a VPC
const vpc = new aws.ec2.Vpc("vpc", {
    cidrBlock: "10.0.0.0/16",
});

// Create Subnets
const subnet1 = new aws.ec2.Subnet("subnet1", {
    vpcId: vpc.id,
    cidrBlock: "10.0.1.0/24",
    availabilityZone: "us-west-2a",
});

const subnet2 = new aws.ec2.Subnet("subnet2", {
    vpcId: vpc.id,
    cidrBlock: "10.0.2.0/24",
    availabilityZone: "us-west-2b",
});

// Create a Security Group
const securityGroup = new aws.ec2.SecurityGroup("securityGroup", {
    vpcId: vpc.id,
    ingress: [
        { protocol: "tcp", fromPort: 80, toPort: 80, cidrBlocks: ["0.0.0.0/0"] },
    ],
    egress: [
        { protocol: "-1", fromPort: 0, toPort: 0, cidrBlocks: ["0.0.0.0/0"] },
    ],
});

// Create an Elastic Load Balancer
const elb = new aws.elb.LoadBalancer("elb", {
    subnets: [subnet1.id, subnet2.id],
    securityGroups: [securityGroup.id],
    listeners: [{
        instancePort: 80,
        instanceProtocol: "HTTP",
        lbPort: 80,
        lbProtocol: "HTTP",
    }],
});

// Export the DNS name of the ELB
export const loadBalancerDnsName = elb.dnsName;

// Create a Kubernetes Provider
const k8sProvider = new k8s.Provider("k8sProvider", {
    kubeconfig: "<your-kubeconfig-file>",
});

// Create a Kubernetes Ingress
const ingress = new k8s.networking.v1.Ingress("example-ingress", {
    metadata: {
        name: "example-ingress",
        namespace: "default",
    },
    spec: {
        rules: [{
            host: "example.com",
            http: {
                paths: [{
                    path: "/",
                    pathType: "Prefix",
                    backend: {
                        service: {
                            name: "example-service",
                            port: {
                                number: 80,
                            },
                        },
                    },
                }],
            },
        }],
    },
}, { provider: k8sProvider });

// Export the Ingress IP
export const ingressIp = ingress.status.loadBalancer.ingress[0].ip;