How do I tell if my container is running inside a Kubernetes cluster?

Question

How can I tell whether or not I am running inside a kubernetes cluster? With docker I can check if /.dockerinit exist. Is there an equivalent?

Answer 1

You can check for KUBERNETES_SERVICE_HOST environment variable.

This variable is always exported in an environment where the container is executed.

Refer to https://kubernetes.io/docs/concepts/services-networking/connect-applications-service/#environment-variables