Azure App Service Plan Scale Out Change Event

Question

Does Azure expose an event that can be used to trigger an API when scaling out? For example, let's say we have a rule that will add another instance of a webapp based on some metric. When the rule condition is met, and Azure adds another instance, can a custom API (or APIM) be called?

Answer 1

you can use Event Grid to publish events from App Service and the subscriber can be a webhook for example, Also in from the app service plan blade through the scale out menu you will see a tab of Notify. In this tab you will see that you can use webhook as well.