Rough Price of EC2 Spot Instances Globally

get_spot_instance_prices_globally.py

from __future__ import division
import sys
import collections
import boto3
import pprint
import re
from datetime import datetime, timedelta


ec2 = boto3.client('ec2', region_name='eu-west-1')
aws_regions = []
for region in ec2.describe_regions()['Regions']:
  aws_regions.append(region['RegionName'])

def print_summary(price_array):
  avg = (sum(price_array)/len(price_array))
  print "  avg: %s" % avg
  print "  max: %s" % max(price_array)
  print "  min: %s" % min(price_array)

def get_spot_price_history_all_regions(instance_type, os='Linux'):
  global_price_list = {}
  for aws_region in aws_regions:
    ec2 = boto3.client('ec2', region_name=aws_region)
    print aws_region
    spot_instance_histories = ec2.describe_spot_price_history(
      InstanceTypes=[instance_type],
      StartTime = datetime.now()  - timedelta(days=7),
      EndTime =  datetime.now()
    )
    price_array = []
    for history_item in spot_instance_histories['SpotPriceHistory']:
      price_array.append(float(history_item['SpotPrice']))
    avg = (sum(price_array)/len(price_array))
    #print_summary
    global_price_list[avg] = aws_region
  global_price_list = collections.OrderedDict(sorted(global_price_list.items()))
  return global_price_list
  return global_price_list
result = get_spot_price_history_all_regions('t2.medium', 'Windows (Amazon VPC)')
pprint.pprint(result)