enable EndpointsFailOpen by default (#3078)

Author: kishorj

docs/deploy/configurations.md

@@ -155,8 +155,8 @@ They are a set of kye=value pairs that describe AWS load balance controller feat
 | ListenerRulesTagging                  | string                          | true           | Enable or disable tagging AWS load balancer listeners and rules |
 | WeightedTargetGroups                  | string                          | true           | Enable or disable weighted target groups |
 | ServiceTypeLoadBalancerOnly           | string                          | false          | If enabled, controller will be limited to reconciling service of type `LoadBalancer`|
-| EndpointsFailOpen                     | string                          | false          | Enable or disable allowing endpoints with `ready:unknown` state in the target groups. |
+| EndpointsFailOpen                     | string                          | true           | Enable or disable allowing endpoints with `ready:unknown` state in the target groups. |
 | EnableServiceController               | string                          | true           | Toggles support for `Service` type resources. |
 | EnableIPTargetType                    | string                          | true           | Used to toggle support for target-type `ip` across `Ingress` and `Service` type resources. |
 | SubnetsClusterTagCheck                | string                          | true           | Enable or disable the check for `kubernetes.io/cluster/${cluster-name}` during subnet auto-discovery |
-| NLBHealthCheckAdvancedConfiguration   | string                          | true           | Enable or disable advanced health check configuration for NLB, for example health check timeout |
+| NLBHealthCheckAdvancedConfiguration   | string                          | true           | Enable or disable advanced health check configuration for NLB, for example health check timeout |

pkg/config/feature_gates.go

@@ -49,7 +49,7 @@ func NewFeatureGates() FeatureGates {
 			ListenerRulesTagging:         true,
 			WeightedTargetGroups:         true,
 			ServiceTypeLoadBalancerOnly:  false,
-			EndpointsFailOpen:            false,
+			EndpointsFailOpen:            true,
 			EnableServiceController:      true,
 			EnableIPTargetType:           true,
 			SubnetsClusterTagCheck:       true,