turn_off_lambda.py

import logging
import os
import boto3

logger = logging.getLogger()
logger.setLevel(logging.INFO)

def turn_off_instance(instance_ids):
  ec2 = boto3.client('ec2', region_name=region)
  ec2.stop_instances(InstanceIds=instance_ids)
  logger.info(f'Instance(s) stopped')

def lambda_handler(event, context):

    logger.info(f'event info -: {event}')
    
    global region
    region = 'eu-east-1'

    global instance_id
    instance_id = os.getenv('instance_id')

    turn_off_instance([instance_id])

    return {
        'statusCode': 200,
    }