func runApply(flagSet *pflag.FlagSet, flags *applyFlags, args []string) error {

	// Start with the basics, verify that the cluster is healthy and get the configuration from the cluster (using the ConfigMap)
	klog.V(1).Infoln("[upgrade/apply] verifying health of cluster")
	klog.V(1).Infoln("[upgrade/apply] retrieving configuration from cluster")

And it shows their true commitment to FastAPI and its **community** (you), as they not only want to provide you a **good service** but also want to make sure you have a **good and healthy framework**, FastAPI. 🙇

   * given to [connectionUser] who may (for example) assign it to a [RealCall.connection].
   *
   * This confirms the returned connection is healthy before returning it. If this encounters any
   * unhealthy connections in its search, this will clean them up.
   *
   * If [routes] is non-null these are the resolved routes (ie. IP addresses) for the connection.

// it is assumed to always be healthy
func isHealthy(cfg config.Config) bool {
	if parseHealthAnnotation(cfg.Annotations[status.WorkloadEntryHealthCheckAnnotation]) {
		// We default to false if the condition is not set. This ensures newly created WorkloadEntries
		// are treated as unhealthy until we prove they are healthy by probe success.

  reserved 15;
}

message Locality {
  string region = 1;
  string zone = 2;
  string subzone = 3;
}

enum WorkloadStatus {
  // Workload is healthy and ready to serve traffic.
  HEALTHY = 0;
  // Workload is unhealthy and NOT ready to serve traffic.
  UNHEALTHY = 1;
}

enum WorkloadType {
  DEPLOYMENT = 0;
  CRONJOB = 1;
  POD = 2;
  JOB = 3;
}

}

func (h *kmsPluginProbe) toHealthzCheck(idx int) healthz.HealthChecker {
	return healthz.NamedCheck(fmt.Sprintf("kms-provider-%d", idx), func(r *http.Request) error {
		return h.check()
	})
}

func (h *kmsv2PluginProbe) toHealthzCheck(idx int) healthz.HealthChecker {
	return healthz.NamedCheck(fmt.Sprintf("kms-provider-%d", idx), func(r *http.Request) error {
		return h.check(r.Context())

			manifestShouldChange: false,
		},
		{
			description: "any path-moving error should result in a rollback and an abort; even though this is the last component (kube-apiserver and kube-controller-manager healthy)",
			waitErrsToReturn: map[string]error{
				waitForHashes:        nil,
				waitForHashChange:    nil,
				waitForPodsWithLabel: nil,
			},
			moveFileFunc: func(oldPath, newPath string) error {

		g.isRunning = false
	}
}

func (g *GenericPLEG) Update(relistDuration *RelistDuration) {
	g.relistDuration = relistDuration
}

// Healthy check if PLEG work properly.
// relistThreshold is the maximum interval between two relist.
func (g *GenericPLEG) Healthy() (bool, error) {
	relistTime := g.getRelistTime()
	if relistTime.IsZero() {
		return false, fmt.Errorf("pleg has yet to be successful")
	}

			"  To avoid, sending traffic to non ready endpoints, enabling this flag, disables panic threshold in Envoy i.e. Envoy does not load balance requests"+
			" to unhealthy/non-ready hosts even if the percentage of healthy hosts fall below minimum health percentage(panic threshold).",
	).Get())

	EnablePersistentSessionFilter = env.Register(
		"PILOT_ENABLE_PERSISTENT_SESSION_FILTER",
		false,

            periodSeconds: 5
            timeoutSeconds: 4
            failureThreshold: 3
            successThreshold: 1
          livenessProbe:
            httpGet:
              path: /-/healthy
              port: 9090
              scheme: HTTP
            initialDelaySeconds: 30
            periodSeconds: 15
            timeoutSeconds: 10
            failureThreshold: 3