Sizer logs into an Azure AD tenant, obtains a list of all subscriptions attached to it and then collects statistics on Virtual Machines, Azure Functions and SQL Servers for indicative Dome9 licensing purposes. As D0 and A0 instance types are not billable assets, these are exempted from the final figures. Function licenses are a total of all function webapps divided by 6 (the current license model).

• Updated core libraries to latest version, resolving security issue in cryptography library
• Changed references from Dome9 to CloudGuard
• Updated standalone Windows executable
• New MacOS standalone executable
• Updated to reflect the changes in licensing for serverless functions (6:1 ratio of functions to single asset license)

If you need to run the tool as a one off and don't want the faff of all the steps below, you can download the ZIP archive. This is a portable version of the tool for Windows or Mac, all batteries included. Download and extract the appropriate platform ZIP and run the executable.

To run this script, you will need the following:-

1. Python 3.6 (or newer)

2. An Azure AD Application Registration (see https://docs.microsoft.com/en-us/azure/active-directory/develop/howto-create-service-principal-portal)

3. Azure environment information

   • Azure AD tenant ID
   • Azure Application (Client) ID
   • Azure Application (Client) Secret Key

4. You will need the Azure Management Group construct configured against your Azure AD (see https://docs.microsoft.com/en-us/azure/governance/management-groups/overview for further information). Adding the Application ID as a Contributor in the IAM Access Control blade in the Tenant Root Group will provide discovery capability.

5. Run git clone https://github.com/chrisbeckett/d9-azure-sizer.git

6. Run python -m venv d9-azure-sizer

7. Run scripts\activate.bat to enable the Python virtual environment on Windows, source bin\activate on Mac/Linux

8. Run pip install -r requirements.txt to install required Python modules

To run the script locally, you need to set several environment variables which are then read in by the script. This prevents any secret keys being hard coded into the script. Set the following:-

• SET AZURE_TENANT_ID=xxxxxxxxxx
• SET AZURE_CLIENT_ID=xxxxxxxxxxx
• SET AZURE_CLIENT_SECRET=xxxxxxxxxxxxxxx

Simply run the script d9-sizer.py from the command line

This tool is to be used to provide indicative numbers of billable assets in an Azure environment for cost analysis purposes. No warranty implied.