return err
		}
		defer func() {
			err := threadNS.Set() // switch back
			if err == nil {
				// Unlock the current thread only when we successfully switched back
				// to the original namespace; otherwise leave the thread locked which
				// will force the runtime to scrap the current thread, that is maybe
				// not as optimal but at least always safe to do.
				runtime.UnlockOSThread()
			}
		}()

		return toRun()
	}

  #
  # podDisruptionBudget:
  #   minAvailable: 1
  #   unhealthyPodEvictionPolicy: AlwaysAllow
  #
  # To disable the PodDisruptionBudget, you can leave it as an empty object `{}`:
  #
  # podDisruptionBudget: {}
  #
  podDisruptionBudget: {}

  terminationGracePeriodSeconds: 30

  # A list of `Volumes` added into the Gateway Pods. See

In the end, [after evaluation](https://docs.google.com/document/d/1c2123cKuYsBDpIon9FFdctWTUIMFweSjgwG7r8l3818/edit), the decision was to move forward with a Rust implementation.
This offered performance benefits that were too large to leave on the table, as well as opportunities to tune to our specific needs.

## Configuration protocol

Ztunnel, of course, needs to be dynamically configured in order to make decisions on how it should handle traffic.

  // +optional
  optional k8s.io.apimachinery.pkg.apis.meta.v1.LabelSelector selector = 4;

  // manualSelector controls generation of pod labels and pod selectors.
  // Leave `manualSelector` unset unless you are certain what you are doing.
  // When false or unset, the system pick labels unique to this job
  // and appends those labels to the pod template.  When true,

  //
  // "csi.storage.k8s.io/ephemeral" is a new feature in Kubernetes 1.16. It is only
  // required for drivers which support both the "Persistent" and "Ephemeral" VolumeLifecycleMode.
  // Other drivers can leave pod info disabled and/or ignore this field.
  // As Kubernetes 1.15 doesn't support this field, drivers can only support one mode when
  // deployed on such a cluster and the deployment determines which mode that is, for example

  //
  // "csi.storage.k8s.io/ephemeral" is a new feature in Kubernetes 1.16. It is only
  // required for drivers which support both the "Persistent" and "Ephemeral" VolumeLifecycleMode.
  // Other drivers can leave pod info disabled and/or ignore this field.
  // As Kubernetes 1.15 doesn't support this field, drivers can only support one mode when
  // deployed on such a cluster and the deployment determines which mode that is, for example

      operator: DoesNotExist
    - key: istio.io/rev
      operator: DoesNotExist
    - key: "kubernetes.io/metadata.name"
      operator: "NotIn"
      values: ["kube-system","kube-public","kube-node-lease","local-path-storage"]
  objectSelector:
    matchExpressions:
    - key: sidecar.istio.io/inject
      operator: DoesNotExist
    - key: istio.io/rev
      operator: DoesNotExist
{{- end }}

option go_package = "k8s.io/api/coordination/v1beta1";

// Lease defines a lease concept.
message Lease {
  // More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata
  // +optional
  optional k8s.io.apimachinery.pkg.apis.meta.v1.ObjectMeta metadata = 1;

  // spec contains the specification of the Lease.

      operator: DoesNotExist
    - key: istio.io/rev
      operator: DoesNotExist
    - key: "kubernetes.io/metadata.name"
      operator: "NotIn"
      values: ["kube-system","kube-public","kube-node-lease","local-path-storage"]
  objectSelector:
    matchExpressions:
    - key: sidecar.istio.io/inject
      operator: DoesNotExist
    - key: istio.io/rev
      operator: DoesNotExist
{{- end }}

      operator: DoesNotExist
    - key: istio.io/rev
      operator: DoesNotExist
    - key: "kubernetes.io/metadata.name"
      operator: "NotIn"
      values: ["kube-system","kube-public","kube-node-lease","local-path-storage"]
  objectSelector:
    matchExpressions:
    - key: sidecar.istio.io/inject
      operator: DoesNotExist
    - key: istio.io/rev
      operator: DoesNotExist
{{- end }}