aws_prices

Fetching AWS price quotes related to 3Y All Upfront Compute Savings Plan with output in an Excel file.
Also pulls in 1yrNoUpfront Compute Savings plan as of 12/03/2020.

Installation

git clone git@github.com:longhorn09/aws_prices.git  
pip3 install xlsxwriter

Running

python3 index.py

Output

Python script will create an Excel file with Savings Plan quotes and filename of

sp_prices.xlsx

in same folder where python script is run. Can easily filter or use vlookup() or any other excel lookup technique such as xlookup() or index/match

Issues

If the Excel file isn't created upon running the script, the likely cause is due to executing Python within WSL (Ubuntu) environment. I think there may be a hidden permissions issue that recently surfaced that oddly doesn't trigger any error messages nor warnings.

The workaround is to install Python to Windows natively and run python from the DOS prompt command line. At which point the .xlsx output file will be created.

Dependencies

Script relies upon xlsxwriter
This is for writing to Excel workbook. To install use pip3 as shown below

pip3 install xlsxwriter

Performance tweaks

Each regional savings plan URL ranges from 40 MB to 0.1GB.
The list of EC2 offers is roughly 1.3GB. Even over gigabit fiber connections, it can take a while to download/read.
Because of this, if repeatedly running this script, save the 1.3GB JSON file locally, and toggle within the getSKUListLocal function and tweak the file name accordingly.

These toggles are around line 142 and line 224 of the code base. doLocal = True or doLocal = False

doLocal = True  # toggle

if (doLocal):
    # this is a 1.3 GB file - may take time
    with open('index_aws_ec2.json') as json_file: 
        myJSON = json.load(json_file)   

JSON reference snippets

When reading from Offer index file for AmazonEC2, look to currentVersionUrl and currentSavingsPlanIndexUrl

    "AmazonEC2" : {
      "offerCode" : "AmazonEC2",
      "versionIndexUrl" : "/offers/v1.0/aws/AmazonEC2/index.json",
      "currentVersionUrl" : "/offers/v1.0/aws/AmazonEC2/current/index.json",
      "currentRegionIndexUrl" : "/offers/v1.0/aws/AmazonEC2/current/region_index.json",
      "savingsPlanVersionIndexUrl" : "/savingsPlan/v1.0/aws/AWSComputeSavingsPlan/current/index.json",
      "currentSavingsPlanIndexUrl" : "/savingsPlan/v1.0/aws/AWSComputeSavingsPlan/current/region_index.json"
    },

When looking up respective savings plan Url in region_index.json, look to versionUrl

  "regions" : [ {
    "regionCode" : "ap-south-1",
    "versionUrl" : "/savingsPlan/v1.0/aws/AWSComputeSavingsPlan/20200806153551/ap-south-1/index.json"
  }, {

3Y Compute Savings Plan All Upfront has product sku of RQRC4CUNT9HUG9WC

{
    "sku" : "RQRC4CUNT9HUG9WC",
    "productFamily" : "ComputeSavingsPlans",
    "serviceCode" : "ComputeSavingsPlans",
    "usageType" : "ComputeSP:3yrAllUpfront",
    "operation" : "",
    "attributes" : {
      "purchaseOption" : "All Upfront",
      "granularity" : "hourly",
      "purchaseTerm" : "3yr",
      "locationType" : "AWS Region",
      "location" : "Any"
    }
  }

Once the product sku is found, then combine that with the other sku to match by rateCode so you can find the correct corresponding discountedRate

, {
    "discountedSku" : "TBV6C3VKSXKFHHSC",
    "discountedUsageType" : "USE2-BoxUsage:t3a.xlarge",
    "discountedOperation" : "RunInstances",
    "discountedServiceCode" : "AmazonEC2",
    "rateCode" : "RQRC4CUNT9HUG9WC.TBV6C3VKSXKFHHSC",
    "unit" : "Hrs",
    "discountedRate" : {
      "price" : "0.0679",
      "currency" : "USD"
    }

Reference links

AWS Bulk API
Savings plan offer file
JSON Editor online
AmazonEC2.currentVersionUrl (1.3GB)