concept at - most - one semantic in category kubernetes

This is an excerpt from Manning's book Kubernetes in Action. Login to get full access to this book.

Introducing StatefulSet’s at-most-one semantics

Kubernetes must thus take great care to ensure two stateful pod instances are never running with the same identity and are bound to the same PersistentVolumeClaim. A StatefulSet must guarantee at-most-one semantics for stateful pod instances.