AWS Tutorials: AWS CodeBuild – Buildspec code for creating AMI from running instances

version: 0.2

phases:
  build:
    commands:
      - |
        #!/bin/bash

		# Author - Rajesh Kumar
		
        # Set AWS region
        export AWS_DEFAULT_REGION=us-east-1

        # Get running all instance IDs
        instance_ids=$(aws ec2 describe-instances --filters "Name=instance-state-name,Values=running" "Name=tag:environment,Values=uat" --query 'Reservations[].Instances[].InstanceId' --output text)

        echo "List of Instances: $instance_ids"

        # Create AMIs from instance IDs
        for instance_id in $instance_ids; do
          instance_name=$(aws ec2 describe-instances --instance-ids $instance_id --query 'Reservations[].Instances[].Tags[?Key==`Name`].Value' --output text)
          timestamp=$(date +%Y-%m-%d-%H-%M-%S)
          ami_name="$instance_name-$timestamp"
          aws ec2 create-image --instance-id $instance_id --name "$ami_name" --no-reboot
        done
Code language: PHP (php)

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "EC2Read",
            "Effect": "Allow",
            "Action": [
                "ec2:DescribeInstances",
                "ec2:DescribeImages",
                "ec2:CreateImage"
            ],
            "Resource": "*"
        }
    ]
}
Code language: JSON / JSON with Comments (json)

Rajesh Kumar

I’m Rajesh Kumar, a DevOps, SRE, DevSecOps, Cloud, and Platform Engineering expert passionate about sharing practical knowledge, real-world experiences, and industry best practices. I have worked at Cotocus and regularly write about technology, travel, investing, health, product reviews, and digital marketing through my various platforms.

I publish technical articles at DevOps School, travel stories at Holiday Landmark, stock market insights at Stocks Mantra, health and fitness guidance at My Medic Plus, product reviews at TrueReviewNow, and SEO and digital marketing strategies at Wizbrand.