// The grace period is the duration in seconds after the processes running in the carp are sent
  // a termination signal and the time when the processes are forcibly halted with a kill signal.
  // Set this value longer than the expected cleanup time for your process.
  // Defaults to 30 seconds.
  // +optional
  optional int64 terminationGracePeriodSeconds = 4;

  // Kubelet retries. Later errors (e.g. loading or validating a checkpointed config) will result in
  // a rollback to LastKnownGood. In the latter case, it is usually possible to resolve the error
  // by fixing the config assigned in Spec.ConfigSource.
  // You can find additional information for debugging by searching the error message in the Kubelet log.

   1. If the certificate is not yet expired, the `SecretManager` also can return a cache response. In practice, this would
       only happen in cases where Envoy were to re-request a resource, which is fairly rare.
   1. `SecretManager` can also read certificates from files. When this is configured, no CA client is used.

Various components described in Config Ingestion can trigger a Config Update. These are batched up ("debounced"), to avoid excessive activity when many changes happen in succession, and eventually enqueued in the Push Queue.