BUG/MINOR: EndpointSlices: ignore non ready endpoints

A possible option would be to let controller configure haproxy with non
ready endpoints/servers and rely on haproxy not to use them via haproxy
health checks.
However they will still be used during the time that takes haproxy to
detect unhealthy servers (this time depends on haproxy health check
configuration).
Thus it is more accurate to only receive ready endpoints from
kubernetes.

Author: Mo3m3n

controller/kubernetes.go

@@ -261,6 +261,9 @@ func (k *K8s) convertToEndpoints(obj interface{}, status store.Status) (*store.E
 		}
 		addresses := make(map[string]struct{})
 		for _, endpoints := range data.Endpoints {
+			if endpoints.Conditions.Ready == nil || !*endpoints.Conditions.Ready {
+				continue
+			}
 			for _, address := range endpoints.Addresses {
 				addresses[address] = struct{}{}
 			}
@@ -285,6 +288,9 @@ func (k *K8s) convertToEndpoints(obj interface{}, status store.Status) (*store.E
 		}
 		addresses := make(map[string]struct{})
 		for _, endpoints := range data.Endpoints {
+			if endpoints.Conditions.Ready == nil || !*endpoints.Conditions.Ready {
+				continue
+			}
 			for _, address := range endpoints.Addresses {
 				addresses[address] = struct{}{}
 			}