// Apply user defined priority failover settings.
			applyFailoverPriorities(loadAssignment, wrappedLocalityLbEndpoints, proxyLabels, localityLB.FailoverPriority)
			// If failover is expliciltly configured with failover priority, apply failover settings also.
			if len(localityLB.Failover) != 0 {
				applyLocalityFailover(locality, loadAssignment, localityLB.Failover)
			}
		} else {

			name: "invalid failover dst contain '*' wildcard",
			in: &networking.LocalityLoadBalancerSetting{
				Failover: []*networking.LocalityLoadBalancerSetting_Failover{
					{
						From: "region1",
						To:   "*",
					},
				},
			},
			outlier: &networking.OutlierDetection{},
			err:     true,
			warn:    false,
		},
		{
			name: "invalid failover src contain '/' separator",

		},
		{
			"both",
			&networking.LocalityLoadBalancerSetting{},
			&networking.LocalityLoadBalancerSetting{Failover: failover},
			&networking.LocalityLoadBalancerSetting{Failover: failover},
		},
		{
			"mesh disabled",
			&networking.LocalityLoadBalancerSetting{Enabled: &wrappers.BoolValue{Value: false}},
			nil,
			nil,
		},
		{

	}

	for _, failover := range lb.GetFailover() {
		if failover.From == failover.To {
			errs = AppendValidation(errs, fmt.Errorf("locality lb failover settings must specify different regions"))
		}
		if strings.Contains(failover.From, "/") || strings.Contains(failover.To, "/") {
			errs = AppendValidation(errs, fmt.Errorf("locality lb failover only specify region"))
		}

    // even if there are endpoints outside of the preferences.
    STRICT = 1;
    // In FAILOVER mode, endpoint selection will prefer endpoints that match all preferences, but failover to groups of endpoints
    // that match less (or, eventually, none) preferences.
    // For instance, with `[NETWORK, REGION, ZONE]`, we will send to:

     */
    boolean isRequireSecureNegotiate ();


    /**
     * Enable port 139 failover
     * 
     * Property <tt>jcifs.smb.client.port139.enabled</tt> (boolean, default false)
     * 
     * @return whether to failover to legacy transport on port 139
     */
    boolean isPort139FailoverEnabled ();


    /**
     * 

}

func applyLocalityLoadBalancer(locality *core.Locality, proxyLabels map[string]string, cluster *cluster.Cluster,
	localityLB *networking.LocalityLoadBalancerSetting,
) {
	// Failover should only be applied with outlier detection, or traffic will never failover.
	enableFailover := cluster.OutlierDetection != nil
	if cluster.LoadAssignment != nil {
		// TODO: enable failoverPriority for `STRICT_DNS` cluster type

requires a setting in the replication configuration called [replica modification sync](https://aws.amazon.com/about-aws/whats-new/2020/12/amazon-s3-replication-adds-support-two-way-replication/).

For active-active replication, automatic failover occurs on `GET/HEAD` operations if object or object version requested qualifies for replication and is missing on one site, but present on the other. This allows the applications to take full advantage of two-way replication even before the two sites...

	// DelayCacheUntilActive specifies when to start caching. If this is true and leader election is enabled,
	// the scheduler will wait to fill informer caches until it is the leader. Doing so will have slower
	// failover with the benefit of lower memory overhead while waiting to become leader.
	// Defaults to false.
	DelayCacheUntilActive bool
}

// KubeSchedulerProfile is a scheduling profile.
type KubeSchedulerProfile struct {

		return buildEmptyClusterLoadAssignment(b.clusterName)
	}

	l := b.createClusterLoadAssignment(localityLbEndpoints)

	// If locality aware routing is enabled, prioritize endpoints or set their lb weight.
	// Failover should only be enabled when there is an outlier detection, otherwise Envoy
	// will never detect the hosts are unhealthy and redirect traffic.