return false
	}

	userIP, _ := netip.ParseAddr(ip)
	return userIP.IsLoopback()
}

// Syncz dumps the synchronization status of all Envoys connected to this Pilot instance
func (s *DiscoveryServer) Syncz(w http.ResponseWriter, req *http.Request) {
	namespace := req.URL.Query().Get("namespace")

	syncz := make([]SyncStatus, 0)
	for _, con := range s.SortedClients() {
		node := con.proxy

func (c *Controller) RegisterEventHandler(kind config.GroupVersionKind, f model.EventHandler) {
	c.monitor.AppendEventHandler(kind, f)
}

// HasSynced return whether store has synced
// It can be controlled externally (such as by the data source),
// otherwise it'll always consider synced.
func (c *Controller) HasSynced() bool {
	if c.hasSynced != nil {
		return c.hasSynced()
	}
	return true
}

func (c *Controller) Run(stop <-chan struct{}) {

	switch a {
	case Add:
		return "Add"
	case Update:
		return "Update"
	}
	return "Unknown"
}

// Run starts the cluster's informers and waits for caches to sync. Once caches are synced, we mark the cluster synced.
// This should be called after each of the handlers have registered informers, and should be run in a goroutine.
func (c *Cluster) Run(mesh mesh.Watcher, handlers []handler, action ACTION) {

	"--concurrent-deployment-syncs=10",
	"--concurrent-horizontal-pod-autoscaler-syncs=10",
	"--concurrent-statefulset-syncs=15",
	"--concurrent-endpoint-syncs=10",
	"--concurrent-ephemeralvolume-syncs=10",
	"--concurrent-service-endpoint-syncs=10",
	"--concurrent-gc-syncs=30",
	"--concurrent-namespace-syncs=20",
	"--concurrent-job-syncs=10",
	"--concurrent-cron-job-syncs=10",
	"--concurrent-replicaset-syncs=10",

	name string
}

// Event feeds a single event into the stats summarizer.
func (s *Summarizer) Event(ev *Event) {
	if s.syncTs == 0 {
		s.syncTs = ev.Time()
	}
	s.lastTs = ev.Time()

	switch ev.Kind() {
	// Record sync time for the RangeActive events.
	case EventSync:
		s.syncTs = ev.Time()

	// Handle state transitions.
	case EventStateTransition:
		st := ev.StateTransition()

	//   and the bookmark event is send when the state is synced
	//   to a `resourceVersion` at least as fresh as the one provided by the ListOptions.
	//   If `resourceVersion` is unset, this is interpreted as "consistent read" and the
	//   bookmark event is send when the state is synced at least to the moment
	//   when request started being processed.

if [ "$#" == 0 ]; then
    echo "usage: $0 <api_dir>..."
    exit 1
fi

kube::protoc::check_protoc

for api; do
    # This can't use `git ls-files` because it runs in a container without the
    # .git dir synced.
    protos=()
    kube::util::read-array protos < <( \
        find "${api}" -type f -name "api.proto")

    if [ "${#protos[@]}" == 0 ]; then
        echo "ERROR: no 'api.proto' files under '${api}'"
        exit 1

	fs.DurationVar(&o.HorizontalPodAutoscalerSyncPeriod.Duration, "horizontal-pod-autoscaler-sync-period", o.HorizontalPodAutoscalerSyncPeriod.Duration, "The period for syncing...

	syncFailuresMD                           = NewCounterMD(syncFailures, "Number of failed IAM data syncs since server start.")
	syncSuccessesMD                          = NewCounterMD(syncSuccesses, "Number of successful IAM data syncs since server start.")
)

// loadClusterIAMMetrics - `MetricsLoaderFn` for cluster IAM metrics.

See the License for the specific language governing permissions and
limitations under the License.
*/

package generic

import (
	"context"
	goerrors "errors"
	"fmt"
	"sync"
	"sync/atomic"
	"time"

	corev1 "k8s.io/api/core/v1"
	"k8s.io/apimachinery/pkg/api/errors"
	"k8s.io/apimachinery/pkg/api/meta"
	"k8s.io/apimachinery/pkg/labels"
	"k8s.io/apimachinery/pkg/runtime"