a Python script to update Launch Template in EC2

create_launch_template.py

import boto3
import argparse

ec2 = boto3.client('ec2')
DEFAULT_INSTANCE_PROFILE = ""
DEFAULT_LT_NAME = ""


def create_lt_version(lt_name, iam_instance_profile):
    '''
    :param lt_name: the Launch Template Name that needs updated.
    :param iam_instance_profile: the IAM instance profile to associate with the LT version.
    :return: the latest version number
    '''
    response = ec2.create_launch_template_version(
        LaunchTemplateName=lt_name,
        LaunchTemplateData={
            'IamInstanceProfile': {
                'Name': iam_instance_profile
            },
            'CpuOptions': {
                'CoreCount': 48,
                'ThreadsPerCore': 1
            }
        }
    )
    return response['LaunchTemplateVersion']['VersionNumber']


def set_version(lt_name, version_number):
    ec2.modify_launch_template(
        LaunchTemplateName=lt_name,
        DefaultVersion=str(version_number)
    )


def main():
    parser = argparse.ArgumentParser(description="A script to update AWS EC2 Launch Template.")
    parser.add_argument(
        '--template',
        help='the name of the EC2 Launch Template.',
        action='store',
        dest="template",
        default=DEFAULT_LT_NAME)
    parser.add_argument(
        '--instance-profile',
        help='the name of the IAM Instance Profile to use within the template.',
        action='store',
        dest="instance_profile",
        default=DEFAULT_INSTANCE_PROFILE)
    args = parser.parse_args()
    print(args.template)
    version = create_lt_version(args.template, args.instance_profile)
    set_version(args.template, version)


if __name__ == '__main__':
    main()