Launch Templates

A launch template is similar to a launch configuration, in that it specifies instance configuration information. It includes the ID of the Amazon Machine Image (AMI), the instance type, a key pair, security groups, and other parameters used to launch EC2 instances. However, defining a launch template instead of a launch configuration allows you to have multiple versions of a launch template.

Here I am going to explain how to create the Launch template.

• Open EC2 Console in AWS. then goto launch template under instance section.

• Create the launch template

• Enter the launch template name and version description. Then add the template tag.

• Select the AMI Name from the drop down.here you can select any operations system image that is available in amazon market place.you can also choose your own custom image.

• Then select the Instance type.

• Select your key pair ,VPC and Security Group in this screen.

• Select the Volume size and type.if you want additional volume you can add here. then click advanced details.

• Enter Your custom User data here. I have enter the userdata to install the nginx webservice.

#!/bin/bash
apt update
apt install -y nginx
service nginx restart
systemctl enable nginx
echo "<h1>Hello Shivam</h1>" > /var/www/html/index.html

• Then finally create launch template.

• Now we can see the created launch template in the launch template console.

• In the EC2 dashboard launch instance option drop down we can see the other option launch instance from template.

• Select the Launch template you want to launch and select the version also.

• Now you can see the Instance in the EC2 dashboard.

• Just check the servers public IP in browser.

• See the content that you are entered in user data.