Project Overview
This learning path guides you through the process of developing a serverless API application on Microsoft Azure. You will leverage Azure Functions to host your API endpoints, Azure Cosmos DB for a NoSQL data backend, and Azure API Management for robust API governance and security.
By the end of this project, you will be able to:
- Design and implement RESTful API endpoints using Azure Functions.
- Integrate Azure Functions with Azure Cosmos DB for data persistence.
- Secure your serverless API with Azure API Management.
- Deploy and manage your serverless API solution effectively.
- Understand best practices for serverless application development.
Key Azure Services
This project primarily utilizes the following Azure services:
- Azure Functions: Event-driven, serverless compute platform to build and deploy APIs.
- Azure Cosmos DB: Globally distributed, multi-model database service for NoSQL data.
- Azure API Management: A hybrid, multi-cloud management platform for APIs.
- Azure Application Insights: A powerful tool for monitoring application performance and detecting anomalies.
Project Steps
- Set up your Azure environment and development tools.
- Create an Azure Function App and define HTTP-triggered functions for your API.
- Configure and connect to an Azure Cosmos DB instance.
- Implement CRUD operations for your data within the Azure Functions.
- Deploy your Azure Functions to the cloud.
- Provision an Azure API Management instance and import your Azure Functions.
- Configure policies in API Management for authentication, rate limiting, and transformation.
- Test your complete serverless API solution.
Example: Basic HTTP Trigger Function (Node.js)
Here's a simplified example of an HTTP-triggered Azure Function that returns a greeting:
module.exports = async function (context, req) {
context.log('JavaScript HTTP trigger function processed a request.');
const name = (req.query.name || (req.body && req.body.name));
const responseMessage = name
? "Hello, " + name + ". This is your serverless API!"
: "This HTTP triggered function executed successfully. Pass a name in the query string or in the request body for a personalized response.";
context.res = {
// status: 200, /* Defaults to 200 */
body: responseMessage
};
};