AWS Hands-On Lab: SNS Topic, SQS Queue, Lambda Consumer & DLQ Deep Dive

Master AWS event-driven architecture in this hands-on lab covering the complete workflow: SNS → SQS ← Lambda, message failures, DLQ handling, and redrive operations.

In this step-by-step demo, you will learn:
🔹 What we build
Create an SNS Topic
Create an SQS Dead Letter Queue (DLQ)
Create the Main SQS Queue
Subscribe Main Queue to the SNS Topic
Create a Lambda function to process Main Queue messages
Update Lambda IAM role for CloudWatch Logs and SQS access
Configure Lambda Trigger for the Main Queue

🔹 What we test
Publish a successful message from SNS → SQS → Lambda
Publish a failure message to simulate Lambda processing errors
Observe:
Failed messages stay in Main Queue
After maxReceiveCount → messages move to DLQ
Demonstrate Redrive from DLQ back to Main Queue

🔹 Bulk Message Test (AWS CLI)
Send 30 messages
15 success payloads
15 failure payloads (Lambda forced failure logic)
Track:
Message movement
Receive count increments
DLQ entries & behavior

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Видео AWS Hands-On Lab: SNS Topic, SQS Queue, Lambda Consumer & DLQ Deep Dive канала AWS Cloud Bytes