Create an S3 Bucket event to get SNS Email Notification on Object upload using Terraform

This lab provides a step-by-step guide on how to create and subscribe to an SNS (Simple Notification Service) Topic using Terraform. SNS is a low-cost infrastructure that allows for mass message delivery to mobile users. It acts as a single message bus, enabling messages to be sent to multiple devices and platforms. SNS uses the publish/subscribe method for push delivery and allows for the separation of microservices, distributed systems, and serverless apps through fully managed pub/sub. Publishers send messages to topics, which act as logical communication points and channels. Subscribers, such as web servers, email addresses, and SQS queues, receive these messages or notifications if they have subscribed to the topic. SNS topics enable publishers to send messages to multiple subscriber endpoints simultaneously, including Amazon SQS queues and AWS Lambda functions. SNS ensures reliable message delivery and can be used to automatically scale up workloads. Additionally, messages can be protected using topic policies.

The lab also introduced S3 (Simple Storage Service), which allows for object storage via a web service interface. Objects are saved as files with metadata and assigned unique ID numbers. These objects are stored in containers called "Buckets," which organize the Amazon S3 namespace at its highest level. Developers can access objects using a REST API, and permissions can be assigned to buckets to allow or deny data transactions. S3 is commonly used for online backups, archiving data, and storing applications from AWS.

Overall, this lab provides a comprehensive understanding of how to create and subscribe to an SNS Topic using Terraform, as well as the benefits of using S3 for object storage in AWS.