From cbb59adbd89d638a62d216c22afea9c834b1b272 Mon Sep 17 00:00:00 2001
From: Santhosh Manohar <santhosh@docker.com>
Date: Sun, 7 Feb 2016 02:43:29 -0800
Subject: [PATCH] Set the compress flag for the responses from external DNS
 servers to avoid sending DNS replies > 512 bytes

Signed-off-by: Santhosh Manohar <santhosh@docker.com>
---
 libnetwork/resolver.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libnetwork/resolver.go b/libnetwork/resolver.go
index 01d3483f08..e0a5e49aad 100644
--- a/libnetwork/resolver.go
+++ b/libnetwork/resolver.go
@@ -229,6 +229,7 @@ func (r *resolver) ServeDNS(w dns.ResponseWriter, query *dns.Msg) {
 
 			resp, _, err = c.Exchange(query, addr)
 			if err == nil {
+				resp.Compress = true
 				break
 			}
 			log.Errorf("external resolution failed, %s", err)