Automate deployment of nested applications using AWS SAM

It is designed for teams or developers who wish to automate serverless application deployment with multiple services. It employs AWS SAM to deploy and define all the components such as APIs, authentication, queues, and databases. 
 

Rather than releasing individual components, you can release nested stacks in AWS CloudFormation. These stacks contain various services such as: 

• Amazon Cognito for user authentication and login 

• AWS Lambda for executing backend code 

• Amazon API Gateway for handling HTTP requests 

• Amazon SQS for messaging between services 

• Amazon DynamoDB as a data store 

The best thing? All of this can be deployed and managed from one location with the AWS SAM CLI tool. It saves time, prevents mistakes, and is clean and scalable. 
 

Why is this template a game changer? 

This is a good idea because it: 

• Saves time by making the entire setup simpler 

• Structures your project by breaking it into small, reusable components 

• Simpler to become current, since each service exists in a separate stack 

• Helps you in scaling, since services are built cloud native. 

• Enhances security by establishing well-defined roles and permissions 

• Eliminates human mistake by employing templates rather than creating them manually 

In short, it lets you work on your app rather than spend time on repetitive setup work. 
 

Who can use this template and when? 

This template is best for: 

• Developers building multi-service serverless apps 

• Teams that collaborate on modular applications with login, APIs, and backend capabilities 

• Any user deploying cloud applications using AWS SAM 

Use this template when: 

You have an application that is more than one-component (e.g., login, product information, shopping cart) 

• You would prefer a clean, reproducible mechanism to deploy it all 

• You intend to improve or create the app later 
   

Main components of the template 

Let's look at what is included in this template: 

1. Users: Your app users. They are interacting with APIs and other capabilities. 
 

2. AWS SAM CLI: This is the software that actually deploys your application. It executes your template and creates the required services in AWS. 
 

3. Parent CloudFormation Stack: This is the root stack that ties all the lower-level stacks such as Auth, Product, and Shopping together. 
 

4. Auth Stack (Authentication): This stack configures Amazon Cognito to manage sign-up, login, and roles for users. 
 

5. Product Stack: This includes a Lambda function and API Gateway to manage product-related logic, such as displaying product information or prices. 
 

6. Shopping Stack: This includes a second Lambda function and Amazon SQS for handling shopping cart actions or order processing. 
 

7. Amazon Cognito: Used to log in and register users. It also helps in controlling who can view what. 
 

8. AWS Lambda (Function 1): This is a backend code for the product section. 
 

9. Amazon API Gateway: This enables users to invoke requests to your Lambda functions. 
 

10. AWS Lambda (Function 2: Used for shopping-related background tasks, such as order processing. 
 

11. Amazon SQS Queue: This enables various sections of the app to communicate with one another by exchanging messages. 
 

12. DynamoDB: NoSQL database for the storage of data such as product information and shopping information. 
 

13. CloudFormation Nested Stacks: These let you manage all of your app as individual stacks, which makes things more organized. 
 

14. Event-Driven Workflow: This causes the services to react to events. For instance, when an item is added to the cart by a user, the related service is invoked. 
 

15. IAM Roles & Policies: They decide who can access what service. They safeguard your application from damage. 
 

How to start with Cloudairy ?

This is how you can open and use this template in Cloudairy: 

To open the template: 

• Log in to your Cloudairy account 

• Go to the Templates Library 

• Search for: Automate Nested Application Deployment with AWS SAM 

• Click on the template to see the preview 

• Choose Open Template to have it opened in your Cloudairy editor 

• Make it fit your project requirements 

To use the template: 

• Open the template in Cloudairy editor  

• Inspect the nested stack structure  

• Update IAM roles and permissions if required  

• Configure Cognito and API Gateway for login and API calls  

• Tailor Lambda functions to product and shopping rules  

• Review and resize DynamoDB tables and SQS queues  

• Export the architecture and deploy it with AWS SAM CLI  

This arrangement enables your entire team to work on various segments while maintaining everything linked and organized.  
 

Summary  

This AWS SAM template helps you in automating nested serverless applications' deployment in an organized and scalable manner. It integrates tools such as Lambda, API Gateway, DynamoDB, Amazon Cognito, and SQS, all of which are managed through CloudFormation stacks. By using this template, you save time, reduce manual effort, and stay organized on your project. Whether you're building a login system, an e-commerce app, or a custom API, this setup will make deployment faster, smoother, and easier to maintain.