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  2. Multi-Region AWS EKS Deployment with Pulumi

How do I implement a multi-region AWS EKS deployment strategy?

In this guide, we’ll walk through the process of deploying a multi-region Amazon EKS (Elastic Kubernetes Service) setup. We’ll create EKS clusters in two different AWS regions and establish a Virtual Private Cloud (VPC) for networking. Multi-region deployments are essential for high availability and disaster recovery, ensuring your applications remain resilient and performant.

Steps overview:

  1. Create a VPC for each region.
  2. Deploy an EKS cluster in each region.
  3. Output the necessary details such as cluster names and VPC IDs.
import * as pulumi from "@pulumi/pulumi";
import * as aws from "@pulumi/aws";

// Define a VPC in the first region
const vpc1 = new aws.ec2.Vpc("vpc_1", {cidrBlock: "10.0.0.0/16"});
// Define subnets in the first region
const subnet1 = new aws.ec2.Subnet("subnet_1", {
    vpcId: vpc1.id,
    cidrBlock: "10.0.1.0/24",
    availabilityZone: "us-east-1a",
});
// Define a VPC in the second region
const vpc2 = new aws.ec2.Vpc("vpc_2", {cidrBlock: "10.1.0.0/16"});
// Define subnets in the second region
const subnet2 = new aws.ec2.Subnet("subnet_2", {
    vpcId: vpc2.id,
    cidrBlock: "10.1.1.0/24",
    availabilityZone: "us-west-2a",
});
// Policies for EKS roles
const eksAssumeRolePolicy = aws.iam.getPolicyDocumentOutput({
    statements: [{
        actions: ["sts:AssumeRole"],
        principals: [{
            type: "Service",
            identifiers: ["eks.amazonaws.com"],
        }],
    }],
});
// Create IAM roles for EKS clusters
const eksRole1 = new aws.iam.Role("eks_role_1", {
    name: "eks-role-us-east-1",
    assumeRolePolicy: eksAssumeRolePolicy.apply(eksAssumeRolePolicy => eksAssumeRolePolicy.json),
});
// Create EKS cluster in the first region
const eksCluster1 = new aws.eks.Cluster("eks_cluster_1", {
    name: "eks-cluster-us-east-1",
    roleArn: eksRole1.arn,
    vpcConfig: {
        subnetIds: [subnet1.id],
    },
});
const eksRole2 = new aws.iam.Role("eks_role_2", {
    name: "eks-role-us-west-2",
    assumeRolePolicy: eksAssumeRolePolicy.apply(eksAssumeRolePolicy => eksAssumeRolePolicy.json),
});
// Create EKS cluster in the second region
const eksCluster2 = new aws.eks.Cluster("eks_cluster_2", {
    name: "eks-cluster-us-west-2",
    roleArn: eksRole2.arn,
    vpcConfig: {
        subnetIds: [subnet2.id],
    },
});
export const eksCluster1Name = eksCluster1.name;
export const eksCluster2Name = eksCluster2.name;
export const vpc1Id = vpc1.id;
export const vpc2Id = vpc2.id;

Key Points:

  • We utilized two providers to split resources between us-east-1 and us-west-2 regions.
  • We created distinct VPCs and subnets in each region for resources isolation.
  • Two EKS clusters were deployed, one in each region, for high availability.
  • IAM roles were created and assigned necessary policies for the EKS clusters.

Concluding Summary:

This guide demonstrated how to set up a multi-region EKS deployment. By creating VPCs, subnets, EKS clusters, and associated IAM roles in two regions, we’ve laid the foundation for a resilient and high-availability infrastructure. This setup ensures your applications can leverage the benefits of multi-region deployment.

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