Creating Immutable Infrastructure With Predefined Key Pairs

In this Pulumi program, we will create immutable infrastructure with predefined key pairs using TypeScript. The key services involved in this solution are AWS EC2 for virtual servers and AWS IAM for managing key pairs. We will define the key pairs in IAM and use them to launch EC2 instances. The infrastructure will be immutable, meaning any changes will result in the creation of new resources rather than modifying existing ones.

Step-by-Step Explanation

1. Set up Pulumi Project: Initialize a new Pulumi project and configure the AWS provider.
2. Define Key Pairs: Create predefined key pairs using AWS IAM.
3. Launch EC2 Instances: Use the predefined key pairs to launch EC2 instances.
4. Output Information: Output relevant information such as instance IDs and public IP addresses.

Key Points

• Immutable Infrastructure: Ensures that changes result in new resource creation, promoting consistency and reliability.
• Predefined Key Pairs: Enhances security by using predefined key pairs for accessing EC2 instances.
• Automation: Automates the creation and management of infrastructure using Pulumi and TypeScript.

Conclusion

By following this guide, you have successfully created immutable infrastructure with predefined key pairs using Pulumi and TypeScript. This approach ensures that your infrastructure is consistent, secure, and easily manageable.

Full Code Example

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

// Create an IAM Key Pair
const keyPair = new aws.ec2.KeyPair("my-key-pair", {
    keyName: "my-key-pair",
    publicKey: "ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEArV..."
});

// Create an EC2 instance
const instance = new aws.ec2.Instance("my-instance", {
    ami: "ami-0c55b159cbfafe1f0", // Amazon Linux 2 AMI
    instanceType: "t2.micro",
    keyName: keyPair.keyName,
    tags: {
        Name: "my-instance",
    },
});

// Export the instance ID and public IP
export const instanceId = instance.id;
export const publicIp = instance.publicIp;