#90DaysOfDevOps Challenge - Day 47: Test Knowledge on AWS

Welcome to Day 47 of the #90DaysOfDevOps Challenge. In today's session, we will put our AWS knowledge to the test and explore some hands-on exercises to deepen our understanding of AWS services. We will focus on two tasks: launching an EC2 instance and creating an Auto Scaling group. Let's dive in!

Task 1: Launch an EC2 Instance and Deploy a Web Application

Step 1: Launch an EC2 instance using the AWS Management Console

Log in to the AWS Management Console.
Navigate to the EC2 service.
Click on "Launch Instances" and follow the wizard to configure your instance.
Select the desired instance type, security group, and other settings.
Choose an appropriate Amazon Machine Image (AMI) for your web server.
Review your configuration and launch the instance.

Step 2: Connect to the EC2 instance using your preferred method

Step 3: Install a web server and deploy a simple web application

Update the package manager on your EC2 instance.
```
  sudo apt update
```
Install a web server of your choice (e.g., Apache, Nginx). You can test it by accessing the public IP Address of the EC2 instance once installed.
```
  sudo apt install apache2
```

Deploy a simple website index.html to the appropriate directory /var/www/html

  <!DOCTYPE html>
  <html>
  <head>
      <title>Esteban Moreno - #90daysofdevopschallenge</title>
  </head>
  <body>
      <h1>Esteban Moreno - #90daysofdevopschallenge</h1>
      <p>Welcome to my simple website.</p>
  </body>
  </html>

Test the web application by accessing the public IP address of your EC2 instance in a web browser.

Step 4: Monitor the EC2 instance using Amazon CloudWatch

Go to the Amazon CloudWatch service in the AWS Management Console.
Create a new CloudWatch dashboard.
Add widgets to monitor key metrics of your EC2 instance, such as CPU utilization, network traffic, and disk usage.
Set up CloudWatch alarms to receive notifications when certain thresholds are exceeded.
Monitor the performance of your EC2 instance and troubleshoot any issues that arise.

Task 2: Create an Auto Scaling Group and Monitor Performance

Step 1: Create an Auto Scaling group using the AWS Management Console

Navigate to the Auto Scaling service in the AWS Management Console.
Click on "Create Auto Scaling group" and follow the wizard to configure your group. A template of the existing EC2 is required to create an ASG.
Navigate to the existing EC2 instance and create a template
Specify the desired capacity, instance type, and other settings.
Set up scaling policies based on demand or schedule.
Configure the desired monitoring and health checks for your instances.

Step 2: Use Amazon CloudWatch to monitor the performance of the Auto Scaling group

You can navigate to the Monitoring section of the Auto Scaling Group to view the monitored metrics.
You can add the above metrics to the dashboard created earlier.
Set up CloudWatch alarms to receive notifications using the available metrics.
Monitor the performance of your Auto Scaling group and troubleshoot any issues that arise.

Step 3: Use the AWS CLI to view the state of the Auto Scaling group and the EC2 instance

Install the AWS CLI on your local machine if you haven't already.
```
  sudo apt install awscli
```
Configure the AWS CLI with your AWS credentials.
```
  aws configure
```
Use the AWS CLI commands to view the state of your Auto Scaling group, such as the number of instances running and the scaling activities.
```
  aws autoscaling describe-auto-scaling-groups
```
Verify that the correct number of instances are running and that the Auto Scaling group is functioning as expected.
```
  aws ec2 describe-instances
```

Congratulations! You have completed the tasks for Day 47 of the #90DaysOfDevOps Challenge. By launching an EC2 instance, deploying a web application, creating an Auto Scaling group, and monitoring the performance using Amazon CloudWatch, you have gained valuable hands-on. Stay tuned for a new AWS service on day 48.

#90DaysOfDevOps Challenge - Day 47 - Test Knowledge on AWS

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