get-cloudwatch-by-instanceid.py

import datetime
import os
import sys

from boto.exception import BotoServerError
import boto.ec2.cloudwatch.metric

import boto

AWS_ACCESS_KEY = "XXX"
AWS_SECRET_KEY = "YYY"

class Error(Exception):
    pass

class InstanceDimension(dict):
    def __init__(self, name, value):
        self[name] = value


def main(argv):
    try:
                
        c = boto.connect_cloudwatch(AWS_ACCESS_KEY, AWS_SECRET_KEY)

        end = datetime.datetime.now()
        start = end - datetime.timedelta(hours=2)

        stats = c.get_metric_statistics(
            60, 
            start, 
            end, 
            'CPUUtilization', 
            'AWS/EC2', 
            'Average', 
            InstanceDimension("InstanceId", 'i-7781301b')
        )

        print stats
            

    except BotoServerError as serverErr:
        print serverErr
        print json.dumps({"error":"Error retrieving CloudWatch metrics."})

if __name__ == "__main__":
    main(sys.argv[1:])