SNS topics and subscriptions in AWS - Mini Project: Build & Apply

SNS topics and subscriptions

📖 Scenario: You are setting up a simple notification system using AWS Simple Notification Service (SNS). You want to create a topic and subscribe an email endpoint to it so that notifications can be sent to that email.

🎯 Goal: Create an SNS topic named MyTopic and subscribe an email address [e-mail] to this topic.

📋 What You'll Learn

Create an SNS topic named MyTopic

Create a subscription for the topic with protocol email

Use the endpoint [e-mail] for the subscription

💡 Why This Matters

🌍 Real World

SNS topics and subscriptions are used to send notifications to users or systems automatically when events happen, such as alerts, updates, or messages.

💼 Career

Understanding how to configure SNS topics and subscriptions is essential for cloud engineers and developers to build event-driven and notification systems in AWS.

1

Create the SNS topic

Create an SNS topic resource named MyTopic using AWS CloudFormation syntax.

AWS

# Your code here to create an SNS topic named MyTopic

Need a hint?

Use AWS::SNS::Topic as the resource type and set TopicName to MyTopic.

2

Add the subscription configuration

Add a subscription property to the MyTopic resource with protocol email and endpoint [e-mail].

AWS

Resources:
  MyTopic:
    Type: AWS::SNS::Topic
    Properties:
      TopicName: MyTopic
      # Add subscription property here

Need a hint?

The Subscription property is a list of subscription objects. Add one with Protocol and Endpoint.

3

Add a topic policy to allow publishing

Add a TopicPolicy resource that allows anyone to publish messages to the MyTopic SNS topic.

AWS

Resources:
  MyTopic:
    Type: AWS::SNS::Topic
    Properties:
      TopicName: MyTopic
      Subscription:
        - Protocol: email
          Endpoint: [e-mail]
# Add TopicPolicy resource below

Need a hint?

Use AWS::SNS::TopicPolicy resource type and attach the policy to MyTopic.

4

Add Outputs for the topic ARN

Add an Outputs section with an output named TopicArn that exports the ARN of the MyTopic SNS topic.

AWS

Resources:
  MyTopic:
    Type: AWS::SNS::Topic
    Properties:
      TopicName: MyTopic
      Subscription:
        - Protocol: email
          Endpoint: [e-mail]
  MyTopicPolicy:
    Type: AWS::SNS::TopicPolicy
    Properties:
      Topics:
        - !Ref MyTopic
      PolicyDocument:
        Version: '2012-10-17'
        Statement:
          - Effect: Allow
            Principal: '*'
            Action: 'SNS:Publish'
            Resource: !Ref MyTopic

# Add Outputs section below

Need a hint?

Outputs section should export the topic ARN using !Ref MyTopic.