nightly-shutdown.py

#!/bin/python

import boto.ec2

whitelist = ["id1", "id2", "id3"]

conn = boto.ec2.connect_to_region("us-east-1",
                                  aws_access_key_id="redacted",
                                  aws_secret_access_key="redacted")

reservations = conn.get_all_reservations()

running_instances = []
for r in reservations:
    for i in r.instances:
        if i.state == "running":
            if i.id not in whitelist:
                running_instances.append(i.id)

conn.stop_instances(instance_ids=running_instances)