evaluate_ec2_instance.py

def evaluate_ec2_instance(ec2_client, event):
    instance_id = event['detail']['instance-id']
    instance_state = event['detail']['state']

    '''
        only perform this evaluation rule when starting an new instance
        check if instance state is pending then try to perfrom evaluation 
    '''
    if instance_state != 'pending':
        log.info('current state : ' + instance_state)
        return

    tag_list = get_tag_for_instance_id(ec2_client, instance_id)

    if not tag_list:
        shutdown_ec2_instance(ec2_client, instance_id)
    else:
        if not validate_tag_name(tag_list):
            shutdown_ec2_instance(ec2_client, instance_id)
        else:
            log.info("Instance has been tagged properly")