Ec2 - Launch Template

 A launch template, in that it specifies instance configuration information.  Amazon Machine Image (AMI) Instance type Key pair Security gro...

 A launch template, in that it specifies instance configuration information. 

• Amazon Machine Image (AMI)
• Instance type
• Key pair
• Security groups
• Other parameters used to launch EC2 instances. 

Step 1: Create EC2 instance 

•             OS: Ubuntu 18.05
•             Instance type: t2.micro
•             Security Group: WebServer(port 22,80 are opened)
•             userdata:

              #!/bin/bash

sudo su

sudo apt update

sudo apt install apache2 -y

sudo echo "<h1>Testing the Launch Template app </h1>" > /var/www/html/index.html

Step 2: Verify Instance get created with Apache installed and in the running state

            sudo su

            systemctl status apache2

            Take Public IP address of Ec2 instance and check on browser.

Step 3: Create an AMI from EC2 instance.

             Select Ec2 instance

             Action-->Image and Tempates ---> Image

             Image :- apacheimg

Step 4: Verify Image get created

            Images--->AMIs

Step 5: Create a Template from this image

            Instances---> Launch Template

            Click on Create Template

            Launch Template Name: ApacheTemplate

            Template Version: Prod

            Applicaiton and OS Images AMIs: apacheimg

            Instance type: t2.micro

            key pair: vdevops

            Security Group: Webserver

 Click on Create launch Tempate

Step 6: Create Ec2 instance from Template

            Select the template ApacheTemplate 

            Action--> Launch Instance from template

            Review the template settings

            Launch Instance

Step 7: Verify the Instance is created and apache is installed with a modified index.html file