How do I attach EBS volumes to EC2 instances on AWS?

When working with cloud infrastructure, it’s common to need additional storage for your compute instances. Attaching volumes to your AWS EC2 instances is a straightforward way to increase storage capacity. Here, I’ll demonstrate best practices for attaching an Amazon EBS (Elastic Block Store) volume to an EC2 instance.

Best Practices

1. Defining Resources Clearly: Ensure all resources such as the EC2 instance and EBS volume are defined clearly to avoid confusion and errors.
2. Referencing Resources Accurately: Always use proper referencing when attaching resources to ensure they are linked correctly.
3. Tagging: Tagging resources helps with organization, billing, and management.

Example Program

The following example details:

• Creation of an EC2 instance.
• Creation of an EBS volume.
• Attaching the EBS volume to the EC2 instance.

Detailed Explanation

1. Define Provider: Specify the AWS region where the resources will be created.
2. Resource Creation:
   • EC2 Instance: We create an EC2 instance and specify necessary attributes like AMI, instance type, and tags.
   • EBS Volume: An EBS volume is defined with the required size and availability zone.
3. Attach Volume: The EBS volume is attached to the created EC2 instance by referencing the instance ID and volume ID.

Program

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

// Create EC2 instance
const example = new aws.ec2.Instance("example", {
    ami: "ami-0c55b159cbfafe1f0",
    instanceType: aws.ec2.InstanceType.T2_Micro,
    tags: {
        Name: "example-instance",
    },
});
// Create EBS volume
const exampleVolume = new aws.ebs.Volume("example", {
    availabilityZone: "us-west-2a",
    size: 10,
    tags: {
        Name: "example-volume",
    },
});
// Attach the EBS volume to EC2 instance
const exampleVolumeAttachment = new aws.ec2.VolumeAttachment("example", {
    deviceName: "/dev/sdh",
    instanceId: example.id,
    volumeId: exampleVolume.id,
});
export const instanceId = example.id;
export const volumeId = exampleVolume.id;

Concluding Summary

In this example, we created an AWS EC2 instance and an EBS volume, then attached the EBS volume to the EC2 instance. Proper referencing and tagging ensure the infrastructure is organized and scalable. This setup can be easily managed and extended as your storage requirements grow.