I understand that this is an experimental feature but one we need. How does one turn this on in Azure Kubernetes?
Alpha features cannot be enabled when using AKS, you would need to look at using AKS-Engine instead which allow you to better control the feature-gate flag for the APIServer: https://github.com/Azure/aks-engine/blob/master/docs/topics/clusterdefinitions.md
https://kubernetes.io/docs/reference/command-line-tools-reference/feature-gates/
Feature Default Stage Since
StartupProbe false Alpha 1.16
Once a feature hits beta, AKS might consider enabling it I think, depending on the risk and size.
This one seems small.