Boto3 Python Script to Stop Instances Unless Tagged "KEEP:KEEP"

boto3_stop_instances_without_tag.py

import boto3

# Get list of regions
ec2_client = boto3.client('ec2')
regions = [region['RegionName']
            for region in ec2_client.describe_regions()['Regions']]

# Iterate over each region
for region in regions:
            ec2 = boto3.resource('ec2', region_name=region)

print("Region:", region)

# Get only running instances
instances = ec2.instances.filter()
reserved_instances = ec2.instances.filter(Filters=[{'Name': 'tag:KEEP','Values': ['KEEP']}])

#    # Stop the instances
for instance in instances:
    if instance not in reserved_instances:
        instance.stop()
        print('Stopped instance: ', instance.id)