remove federation (#3794)

Signed-off-by: zounengren <zounengren@cmss.chinamobile.com>

plugin/kubernetes/README.md

@@ -182,20 +182,6 @@ be set to `verified` for this to function properly.
         }
     }
 
-## Federation
-
-The *kubernetes* plugin can be used in conjunction with the *federation* plugin.  Using this
-feature enables serving federated domains from the Kubernetes clusters.
-
-    cluster.local {
-        federation {
-            prod prod.example.org
-            staging staging.example.org
-        }
-        kubernetes
-    }
-
-
 ## Wildcards
 
 Some query labels accept a wildcard value to match any value.  If a label is a valid wildcard (\*,

plugin/kubernetes/local.go

@@ -35,24 +35,3 @@ func boundIPs(c *caddy.Controller) (ips []net.IP) {
 	}
 	return ips
 }
-
-// LocalNodeName is exclusively used in federation plugin, will be deprecated later.
-func (k *Kubernetes) LocalNodeName() string {
-	if len(k.localIPs) == 0 {
-		return ""
-	}
-
-	// Find fist endpoint matching any localIP
-	for _, localIP := range k.localIPs {
-		for _, ep := range k.APIConn.EpIndexReverse(localIP.String()) {
-			for _, eps := range ep.Subsets {
-				for _, addr := range eps.Addresses {
-					if localIP.Equal(net.ParseIP(addr.IP)) {
-						return addr.NodeName
-					}
-				}
-			}
-		}
-	}
-	return ""
-}

plugin/kubernetes/parse.go

@@ -29,8 +29,6 @@ func parseRequest(name, zone string) (r recordRequest, err error) {
 	// 1. _port._protocol.service.namespace.pod|svc.zone
 	// 2. (endpoint): endpoint.service.namespace.pod|svc.zone
 	// 3. (service): service.namespace.pod|svc.zone
-	//
-	// Federations are handled in the federation plugin. And aren't parsed here.
 
 	base, _ := dnsutil.TrimZone(name, zone)
 	// return NODATA for apex queries