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

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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

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "EC2Read",
            "Effect": "Allow",
            "Action": [
                "ec2:DescribeInstances",
                "ec2:DescribeImages",
                "ec2:CreateImage"
            ],
            "Resource": "*"
        }
    ]
}

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