Created
October 2, 2019 02:13
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lambda python
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| import boto3 | |
| from botocore.exceptions import ClientError | |
| def run(event, context): | |
| client = boto3.client('ec2') | |
| ec2_regions = [region['RegionName'] for region in client.describe_regions()['Regions']] | |
| print("Regions: ", ec2_regions) | |
| for region in ec2_regions: | |
| ec2 = boto3.resource('ec2', region_name=region) | |
| all_instances = [i for i in ec2.instances.filter(Filters=[ | |
| { | |
| 'Name': 'instance-state-name', | |
| 'Values': ['running'] | |
| } | |
| ])] | |
| if len(all_instances) == 0: | |
| print("No instance is running in ", region) | |
| continue | |
| else: | |
| print("Running instances: ", all_instances) | |
| # Filter list of persistent instances | |
| instances = [i for i in ec2.instances.filter(Filters=[ | |
| { | |
| 'Name': 'instance-state-name', | |
| 'Values': ['running'] | |
| }, | |
| { | |
| 'Name': 'tag:janitor_monitor_status', | |
| 'Values': ['run'] | |
| } | |
| ])] | |
| print("Persistent instances: ", instances) | |
| # Construct list of instances to be stopped | |
| # Invert select | |
| instances_to_stop = [to_stop for to_stop in all_instances if to_stop.id not in [i.id for i in instances]] | |
| if len(instances_to_stop) == 0: | |
| print("No instance to be stopped") | |
| else: | |
| # Loop through to be stopped list | |
| for instance in instances_to_stop: | |
| # Add tag | |
| print("Instance to be stopped: ", instance.id) | |
| tags = {} | |
| for tag in instance.tags or []: | |
| tags[tag['Key']] = tag['Value'] | |
| # Check if tag is in | |
| if 'janitor_monitor_status' not in tags: | |
| print("Adding 'janitor_monitor_status' tag key with value 'off' to instance: ", instance) | |
| client.create_tags( | |
| Resources=[ | |
| instance.id | |
| ], | |
| Tags=[ | |
| { | |
| 'Key': 'janitor_monitor_status', | |
| 'Value': 'off' | |
| } | |
| ] | |
| ) | |
| try: | |
| print("Stopping instance: ", instance.id) | |
| instance.stop() | |
| except ClientError as e: | |
| print(e) |
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