[gateway/xds] Use local DNS resolver

Author: dilyevsky

pkg/gateway/xds/translator/cluster.go

@@ -83,6 +83,18 @@ func buildXdsCluster(args *xdsClusterArgs) *clusterv3.Cluster {
 LocalityWeightedLbConfig: &clusterv3.Cluster_CommonLbConfig_LocalityWeightedLbConfig{}}},
 OutlierDetection: &clusterv3.OutlierDetection{},
 PerConnectionBufferLimitBytes: wrapperspb.UInt32(tcpClusterPerConnectionBufferLimitBytes),
+DnsResolvers: []*corev3.Address{
+{
+Address: &corev3.Address_SocketAddress{
+SocketAddress: &corev3.SocketAddress{
+Address: "127.0.0.1",
+PortSpecifier: &corev3.SocketAddress_PortValue{
+PortValue: 8053,
+},
+},
+},
+},
+},
 }
 
 cluster.ConnectTimeout = buildConnectTimeout(args.timeout)