How do I use Keycloak with Amazon EC2?

To use Keycloak with Amazon EC2, you need to set up an EC2 instance where Keycloak will be installed and configured. Keycloak is an open-source identity and access management solution for modern applications and services.

Here’s a step-by-step guide to achieve this using Pulumi:

1. Provision an EC2 Instance: Create an EC2 instance on AWS.
2. Install Docker on EC2: Use a startup script to install Docker on the EC2 instance.
3. Run Keycloak in Docker: Pull and run the Keycloak Docker container on the EC2 instance.

Detailed Steps

1. Provision an EC2 Instance:

   • We’ll use the aws.ec2.Instance resource to create an EC2 instance.
   • We’ll specify the instance type, key name for SSH access, and the AMI ID.

2. Install Docker on EC2:

   • We’ll use the user_data property of the EC2 instance to run a script that installs Docker.

3. Run Keycloak in Docker:

   • The startup script will pull the Keycloak Docker image and run it.

Here is the Pulumi program in TypeScript to accomplish this:

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

// Create a new security group for port 8080
const sg = new aws.ec2.SecurityGroup("keycloak-sg", {
    description: "Allow HTTP traffic",
    ingress: [
        { protocol: "tcp", fromPort: 8080, toPort: 8080, cidrBlocks: ["0.0.0.0/0"] },
    ],
});

// Create an EC2 instance to run Keycloak
const keycloakInstance = new aws.ec2.Instance("keycloak-instance", {
    instanceType: "t2.micro",
    ami: "ami-0c55b159cbfafe1f0", // Amazon Linux 2 AMI
    keyName: "your-key-name", // Replace with your key name
    securityGroups: [sg.name],
    userData: `#!/bin/bash
        # Install Docker
        amazon-linux-extras install -y docker
        service docker start
        usermod -a -G docker ec2-user

        # Run Keycloak
        docker run -d -p 8080:8080 --name keycloak jboss/keycloak`,
});

// Export the public IP of the instance
export const publicIp = keycloakInstance.publicIp;
export const publicHostName = keycloakInstance.publicDns;

Explanation

• Security Group: We create a security group that allows inbound traffic on port 8080. This is necessary because Keycloak will run on port 8080.
• EC2 Instance: We provision an EC2 instance using the Amazon Linux 2 AMI. The userData script installs Docker and runs the Keycloak Docker container on port 8080.
• Exports: We export the public IP and DNS name of the EC2 instance, which you can use to access Keycloak.

Running the Program

1. Ensure you have Pulumi installed and configured.
2. Replace "your-key-name" with the name of your SSH key pair.
3. Run pulumi up to provision the resources.

Once the resources are created, you can access Keycloak at http://<public-ip>:8080. You can find the public IP in the output of the Pulumi command.

This setup provides a basic Keycloak instance running on an EC2 instance. For a production setup, consider additional security measures, backup strategies, and scaling solutions.