// Initialized as false, becomes true after startupProbe is considered
  // successful. Resets to false when the container is restarted, or if kubelet
  // loses state temporarily. In both cases, startup probes will run again.
  // Is always true when no startupProbe is defined and container is running and
  // has passed the postStart lifecycle hook. The null value must be treated the
  // same as false.
  // +optional