AWS Elastic Beanstalk is a Platform as a Service (PaaS) that allows developers to deploy and manage applications in the AWS Cloud without worrying about the infrastructure that runs those applications. It supports several programming languages and frameworks, including Java, .NET, PHP, Node.js, Python, Ruby, Go, and Docker.

• Environment: A collection of AWS resources running an application version.
• Application: A logical collection of Elastic Beanstalk components, including environments, versions, and configurations.
• Application Version: A specific, labeled iteration of deployable code for a web application.
• Environment Tier: Determines the type of application that the environment runs, either web server or worker.

1. Open the Elastic Beanstalk Console:

   • Navigate to the Elastic Beanstalk Console.

2. Create a New Application:

   • Click on "Create Application".
   • Enter an application name and description.

3. Configure the Environment:

   • Choose the platform (e.g., Node.js, Python, etc.).
   • Select a sample application or upload your own code.

4. Review and Launch:

   • Review the configuration settings.
   • Click "Create environment" to launch the application.

1. Prepare Your Application:

   • Ensure your application is packaged correctly (e.g., ZIP file for Node.js).

2. Deploy the Application:

   • In the Elastic Beanstalk Console, select your application.
   • Click on "Upload and Deploy".
   • Choose the application version to deploy and click "Deploy".

1. Environment Configuration:

   • Modify environment settings such as instance type, scaling, and environment variables.
   • Access the "Configuration" tab in the Elastic Beanstalk Console.

2. Monitoring and Logs:

   • Use the "Monitoring" tab to view metrics and health status.
   • Access logs from the "Logs" tab to troubleshoot issues.

1. Create a Simple Node.js Application:

   // app.js
   const express = require('express');
   const app = express();
   const port = process.env.PORT || 3000;
   
   app.get('/', (req, res) => {
     res.send('Hello, AWS Elastic Beanstalk!');
   });
   
   app.listen(port, () => {
     console.log(`App running on port ${port}`);
   });
   

2. Package the Application:

   • Create a package.json file:

     {
       "name": "myapp",
       "version": "1.0.0",
       "main": "app.js",
       "dependencies": {
         "express": "^4.17.1"
       },
       "scripts": {
         "start": "node app.js"
       }
     }
     

   • Zip the application files (app.js and package.json).

3. Deploy to Elastic Beanstalk:

   • Follow the steps in the "Setting Up AWS Elastic Beanstalk" section to create an application and environment.
   • Upload the ZIP file and deploy.

1. Create a Simple Flask Application:

   # app.py
   from flask import Flask
   app = Flask(__name__)
   
   @app.route('/')
   def hello_world():
       return 'Hello, AWS Elastic Beanstalk!'
   
   if __name__ == '__main__':
       app.run(host='0.0.0.0', port=8080)
   

2. Package the Application:

   • Create a requirements.txt file:

     Flask==2.0.1
     

   • Zip the application files (app.py and requirements.txt).

3. Deploy to Elastic Beanstalk:

   • Follow the steps in the "Setting Up AWS Elastic Beanstalk" section to create an application and environment.
   • Upload the ZIP file and deploy.

1. Create the Flask Application:

   • Write the app.py and requirements.txt files as shown above.

2. Package the Application:

   • Zip the files together.

3. Deploy:

   • Use the Elastic Beanstalk Console to create a new application and environment.
   • Upload the ZIP file and deploy.

• Incorrect Packaging: Ensure that your application is correctly packaged (e.g., all necessary files are included in the ZIP file).
• Environment Variables: Remember to set environment variables if your application depends on them.
• Monitoring: Regularly monitor your application’s health and logs to catch issues early.

AWS Elastic Beanstalk simplifies the process of deploying and managing applications in the AWS Cloud. By abstracting the underlying infrastructure, developers can focus on writing code and delivering features. In this module, you learned how to set up, deploy, and manage applications using Elastic Beanstalk, and you practiced deploying a Node.js and a Python Flask application. Next, you will explore other advanced AWS services and best practices.