Stop all running EC2 and (optionally) RDS Instances

stop_instances.py

#!/usr/bin/env python3
import boto3

ec2 = boto3.resource('ec2')
rds = boto3.client('rds')

include_rds = False

def lambda_handler(event, context):
    # Stop EC2 instances
    running_instances = ec2.instances.filter(
        Filters=[{'Name': 'instance-state-name', 'Values': ['running']}])

    for instance in running_instances:
        # get instance Name tag
        instance_name = ''
        for tag in instance.tags:
            if tag['Key'] == 'Name':
                instance_name = tag['Value']
                break
        print('Stopping EC2 instance:', instance.id, ' Name:', instance_name)
        try:
            instance.stop()
        except Exception as e:
            print('Error stopping instance:', instance.id, ' Error:', e)

    # Stop RDS instances if include_rds is True
    if include_rds:
        rds_instances = rds.describe_db_instances()
        for instance in rds_instances['DBInstances']:
            # Get instance Name tag
            instance_name = ''
            for tag in instance['TagList']:
                if tag['Key'] == 'Name':
                    instance_name = tag['Value']
                    break
            print('RDS instance:', instance['DBInstanceIdentifier'], ', Name:', instance_name,  ', Status:', instance['DBInstanceStatus'])
            if instance['DBInstanceStatus'] == 'available':
                print('Stopping RDS instance:', instance['DBInstanceIdentifier'])
                try:
                    rds.stop_db_instance(DBInstanceIdentifier=instance['DBInstanceIdentifier'])
                except Exception as e:
                    print('Error stopping RDS instance:', instance['DBInstanceIdentifier'], ' Error:', e)

    if include_rds:
        print('All running EC2 and RDS instances are stopped')
        return 'All running EC2 and RDS instances are stopped'
    else:
        print('All running EC2 instances are stopped')
        return 'All running EC2 instances are stopped'

if __name__ == '__main__':
#     include_rds = True
    lambda_handler(None, None)