A set of powershell functions:

• Add purpose is running every hour, picking all resource groups without a tag purpose and trying to apply a default tag based on resource group name.

• AddExpiryDate is running every hour, picking all resource groups with a tag purpose set to experiment. If there's no expiry date, it's setting one to 14 days from now (can be configured in the app settings by modifying setting DEFAULT_EXPIRY_DAYS).

• CleanupExpired is running every day at UTC+8 (PDT 1AM), and removing all resource groups with an expiry date in the past. It also create an event to warn about resources planned for deletion within DEFAULT_WARNING_DAYS (default 1)

Deployment

Run ./provision.sh in an Azure Cloud Shell, this will generate a pre-configured new function app in a resource group.