Use like: $ EC2_HOST=myiaas.example.com AWS_ACCESS_KEY_ID=somekey AWS_SECRET_ACCESS_KEY=somesecret python list_instances.py

list_instances.py

#!/usr/bin/env python

import os

from boto.ec2.connection import EC2Connection
from boto.regioninfo import RegionInfo

host = os.environ["EC2_HOST"]

region = RegionInfo(name="Nimbus", endpoint=host)
conn = EC2Connection(region=region, port=8444, validate_certs=False)

rs = conn.get_all_instances()
for r in rs:
    for instance in r.instances:
        print instance
        print instance.instance_type
        print instance.public_dns_name