Understanding Deployment Models

When it comes to deploying applications, there are different deployment models to consider based on your needs and requirements. Let's explore some of the commonly used deployment models:

1. Monolithic: In a monolithic deployment model, the entire application is built as a single unit. All the code for different components of the application is tightly integrated and deployed together. This model is suitable for small to medium-sized applications with a relatively simple architecture.

   Example of a monolithic deployment model in JavaScript:

   JAVASCRIPT

   1// Server setup
   2const express = require('express');
   3const app = express();
   4
   5// Route definition
   6app.get('/', (req, res) => {
   7  res.send('Hello, World!');
   8});
   9
   10// Server listening
   11app.listen(3000, () => {
   12  console.log('Server is running on port 3000');
   13});

2. Microservices: In a microservices deployment model, the application is divided into smaller, independent services that can be developed and deployed separately. Each microservice focuses on a specific functionality and communicates with other services through APIs. This model allows for scalability, fault tolerance, and independent development and deployment of services.

3. Serverless: In a serverless deployment model, the application logic is written as functions that are executed in a serverless environment. The developer does not have to worry about managing servers or infrastructure. The serverless platform automatically scales the application based on demand and only charges for actual usage.

   Example of a serverless deployment model using AWS Lambda:

   JAVASCRIPT

   1// Lambda function
   2exports.handler = async (event) => {
   3  const response = {
   4    statusCode: 200,
   5    body: JSON.stringify('Hello, World!'),
   6  };
   7  return response;
   8};

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// Here is an example of a monolithic deployment model

​

const express = require('express');

const app = express();

​

app.get('/', (req, res) => {

  res.send('Hello, World!');

});

​

app.listen(3000, () => {

  console.log('Server is running on port 3000');

});