// accuracy and only uses their change to indicate that another client has
// renewed the leader lease. Thus the implementation is tolerant to arbitrary
// clock skew, but is not tolerant to arbitrary clock skew rate.
//
// However the level of tolerance to skew rate can be configured by setting
// RenewDeadline and LeaseDuration appropriately. The tolerance expressed as a

	endpointInterval time.Duration
	serverId         string
	// peeraddress stores the IP and port of this kube-apiserver. Used by peer kube-apiservers to
	// route request to this apiserver in case of a version skew.
	peeraddress string

	client kubernetes.Interface

	lock   sync.Mutex
	stopCh chan struct{} // closed by Stop()
}

func New(serverId string, peeraddress string,

 */
object Punycode {
  val PREFIX_STRING = "xn--"
  val PREFIX = PREFIX_STRING.encodeUtf8()

  private const val BASE = 36
  private const val TMIN = 1
  private const val TMAX = 26
  private const val SKEW = 38
  private const val DAMP = 700
  private const val INITIAL_BIAS = 72
  private const val INITIAL_N = 0x80

  /**
   * Returns null if any label is oversized so much that the encoder cannot encode it without

			selfMatchNum = 1
		}

		pair := topologyPair{key: tpKey, value: tpVal}
		matchNum := 0
		if tpCount, ok := s.TpPairToMatchNum[pair]; ok {
			matchNum = tpCount
		}
		skew := matchNum + selfMatchNum - minMatchNum
		if skew > int(c.MaxSkew) {

func TestGenerated(t *testing.T) {
	testenv.MustHaveGoRun(t)

	// Here we use 'go run cmd/dist' instead of 'go tool dist' in case the
	// installed cmd/dist is stale or missing. We don't want to miss a
	// skew in the data due to a stale binary.
	cmd := testenv.Command(t, "go", "run", "cmd/dist", "list", "-json", "-broken")

	// cmd/dist requires GOROOT to be set explicitly in the environment.

		// CSI migration is supported even if there is version skew between
		// managers and node.
		return true, nil
	}

	if len(nodeName) == 0 {
		return false, errors.New("nodeName is empty")
	}

	kubeClient := vpm.Host.GetKubeClient()
	if kubeClient == nil {
		// Don't handle the controller/kubelet version skew check and fallback
		// to just checking the feature gates. This can happen if

			// For executing: the denominator will be seats, so this metric will skew low.
			// For waiting: total queue capacity is generally quite generous, so this metric will skew low.
			Buckets:        []float64{0, 0.001, 0.003, 0.01, 0.03, 0.1, 0.25, 0.5, 0.75, 1},
			StabilityLevel: compbasemetrics.ALPHA,
		},
		LabelNamePhase, priorityLevel,

func TestCNIVersionSkew(t *testing.T) {
	framework.
		NewTest(t).
		Run(func(t framework.TestContext) {
			if !i.Settings().EnableCNI {
				t.Skip("CNI version skew test is only tested when CNI is enabled.")
			}
			for _, v := range versions {
				installCNIOrFail(t, v)
				podFetchFn := kube.NewSinglePodFetch(t.Clusters().Default(), i.Settings().SystemNamespace, "k8s-app=istio-cni-node")

// of one another and other runtime memory stats. The fact that they
// may be acquired at different times, especially with respect to
// heapStatsAggregate, means there could be some skew, but because of
// these stats are independent, there's no real consistency issue here.
type sysStatsAggregate struct {
	stacksSys      uint64
	mSpanSys       uint64
	mSpanInUse     uint64
	mCacheSys      uint64

	// 1. kube-apiserver and peer when the local apiserver is not able to serve the request due
	// to version skew
	// 2. kube-apiserver and aggregated apiserver

	// We specify this as on option to pass a common proxyCA to multiple apiservers to simulate
	// an apiserver version skew scenario where all apiservers use the same proxyCA to verify client connections.
	ProxyCA *ProxyCA
}