AWS EC2 Automation

Day 40 of #90DaysOfDevOps

Task1:

• Create a launch template with Amazon Linux 2 AMI and t2.micro instance type with Jenkins and Docker setup.

• Create 3 Instances using Launch Template, there must be an option that shows the number of instances to be launched.

• You can go one step ahead and create an auto-scaling group.

Solution:

To create a launch template, follow the steps:

• Go to the EC2 dashboard and click on the "Launch templates" under instances

• Click on "Create launch template"

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• Enter the name and description of the template. Make sure to check the auto-scaling guidance.

• 

  Next, Choose Amazon Linux 2 AMI and instance type (t2.micro)

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  Create/Select Key pair for login.

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• Choose network settings.

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• After that in the Advance section, scroll down to user data and enter the below data.

•   #!/bin/bash
  
    # Update system
    sudo yum update -y
  
    # Install Apache Server
    sudo yum install httpd -y
    sudo systemctl start httpd
    sudo systemctl enable httpd
    cd /var/www/html/
    sudo touch index.html
    sudo chmod 666 index.html
    sudo echo '<div style="text-align:center;font-family:arial;"><h1>New instance created by Neel - Your DevOps Guy</h1></div>' > index.html
  
    # Install Java for Jenkins
    sudo amazon-linux-extras install java-openjdk11 -y
  
    # Install Jenkins
    sudo wget -O /etc/yum.repos.d/jenkins.repo \
          https://pkg.jenkins.io/redhat-stable/jenkins.repo
    sudo rpm --import https://pkg.jenkins.io/redhat-stable/jenkins.io-2023.key
    sudo yum update -y
    sudo yum install jenkins -y
    sudo systemctl enable jenkins
    sudo systemctl start jenkins
  
    # Install Jenkins
    sudo yum install docker -y
    sudo systemctl enable docker
    sudo systemctl start docker
  

• 

  Finally, click on Create launch template to create.

• Now to launch the template, select the template and click on Actions and then launch instance from template.

• 

  Next, you need to enter the number of instances you want to create. Enter 3 and launch.

• 

  In the dashboard, you will find new 3 instances running.

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---

Create an Auto-Scaling group from the template

• From the launch template dashboard, click on actions and then "create auto-scaling group"

• 

  In the next step, you need to fill up the form to setup the auto-scalling.

• First, Enter the name and choose the template.

• 

  Then select the vpc and the availability zones.

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  Next, in the load balancer, click on attach new.

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  At the bottom, check the monitoring option

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  Now configure the group size and scaling policy.

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• Next, in the notification, click on add and then create one.

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  After setting up the email for SNS, review the whole setup. Finally, Click on Create the auto-scaling group.

• After successfully creating it, you can find it on the auto-scaling dashboard.

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• To confirm, go to the instance dashboard to find out running instances.

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  You will also receive emails from AWS after each successful launch of the instance.

• 

Thank You.