This article is more than one year old. Older articles may contain outdated content. Check that the information in the page has not become incorrect since its publication. Author: Ahmet Alp Balkan (Google) Update (December 2021): Kubernetes now has built-in gRPC health probes starting in v1.23. To learn more, see Configure Liveness, Readiness and Startup Probes. This article was originally written