aws snippets

aws tidbits

Query AWS regions for active EC2 instances:
aws ec2 describe-instances --region us-east-1

# read from s3 triggered events
def s3_file_name(event):
    records = [x for x in event.get('Records', []) if x.get('eventName') == 'ObjectCreated:Put']
    sorted_events = sorted(records, key=lambda e: e.get('eventTime'))
    latest_event = sorted_events[-1] if sorted_events else {}
    info = latest_event.get('s3', {})
    file_key = info.get('object', {}).get('key')
    bucket_name = info.get('bucket', {}).get('name')

    s3_info = {
        "bucket": bucket_name,
        "key": file_key,
    }

    print(f"going to process s3 file: {s3_info}")
    return s3_info