How to use bootstrap script in AWS ( EC2 Instance )
This tutorial will explain about how to use bootstrap script in AWS
What is Bootstrap Script(Bootstrapping) in AWS ?
Bootstrapping allows us to write and put a startup script while launching an EC2 Instance so that it execute automatically as soon as the instance launch.
Let’s suppose you have to launch an ec2 instances with Apache HTTPD installed on the System.So instead of installing HTTPD the server manually , you can launch EC2 Instances using Bootstrap Script.
How to Use Bootstrap Script in AWS?
Step 1 – Login to your AWS Account and Launch an Instance
If you don’t have AWS account , you can create a free tier account by following link.
Create AWS Free Tier Account
Now launch an EC2 Linux Instance with Amazon Linux 2 as an O/S .Follow my previous article How to launch Linux Virtual Machine on AWS to launch an EC2 Linux Instance but make sure to use the following script in User Data as mentioned below:
Under Configure Instance in Advance Details put the following Example Bash Script. You can put any other script as per your requirement and use case.
sudo yum update -y
sudo yum install httpd -y
sudo service httpd start && sudo chkconfig httpd on
Connect EC2 Linux Instance
Step 2 – Connect to ec2 instance using ssh
Connect your AWS EC2 Linux Instance using SSH
$ sudo ssh -i your_private_key.pem [email protected]_instance_public_ip_address
Verify the Bootstrap Script
Step 3 – Verify if script ran properly
$ sudo yum history
Here you can see in the screenshot , all the commands in bootstrap script ran properly.
you can also check the httpd service status using following command.
$ sudo service httpd status
Similarly, you can also use a bootstrap script for AWS Windows Instance as well using Batch/Power shell script.
If you want to learn how to launch EC2 Windows Instance read my previous article How to Launch Windows Virtual Machine in AWS
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