How Do I Set Up an AWS SQS Queue Policy?

Introduction

This guide aims to provide a comprehensive walkthrough for setting up an AWS Simple Queue Service (SQS) with a custom policy using Pulumi. AWS SQS is a fully managed message queuing service that facilitates the decoupling and scaling of microservices, distributed systems, and serverless applications. By the end of this guide, you will be able to create an SQS queue and attach a policy that controls access permissions.

Step-by-Step Guide

Step 1: Create an AWS SQS Queue

The first step is to set up an SQS queue. This queue will serve as the destination for messages sent by your applications.

Step 2: Attach a Policy to the Queue

Once the queue is created, the next step is to define and attach a policy. This policy specifies the permissions, such as which AWS accounts are allowed to send or receive messages from the queue. The policy is crucial for ensuring secure and controlled access to the queue.

Here is the full code implementation:

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

// Create an SQS Queue
const myQueue = new aws.sqs.Queue("my_queue", {name: "my-queue"});
// Define a Queue Policy JSON
const sqsPolicy = aws.iam.getPolicyDocumentOutput({
    statements: [{
        actions: [
            "sqs:SendMessage",
            "sqs:ReceiveMessage",
        ],
        resources: [myQueue.arn],
        principals: [{
            type: "AWS",
            identifiers: ["arn:aws:iam::123456789012:root"],
        }],
    }],
});
// Attach the Policy to the SQS Queue
const myQueuePolicy = new aws.sqs.QueuePolicy("my_queue_policy", {
    queueUrl: myQueue.id,
    policy: sqsPolicy.apply(sqsPolicy => sqsPolicy.json),
});
export const queueName = myQueue.name;
export const queueArn = myQueue.arn;
export const queueUrl = myQueue.id;

Key Points

• SQS Queue Creation: The process begins with creating an SQS queue where messages will be stored.
• Policy Attachment: A custom policy is attached to the queue to manage permissions and secure access.
• IAM Policy: The policy includes specific IAM rules that define who can perform actions like sending and receiving messages.

Conclusion

In this guide, we successfully set up an AWS SQS queue with a custom policy using Pulumi. This configuration enables specific message actions and restricts access based on AWS account identifiers, ensuring that your SQS queue is both functional and secure. By controlling access through IAM policies, you can maintain the integrity and security of your message queuing system.