From f21d2dde5a0b7b124407ab504c289c6a36f2f3d7 Mon Sep 17 00:00:00 2001
From: Bryan Boreham <bryan@weave.works>
Date: Thu, 28 Jul 2016 12:34:21 +0100
Subject: [PATCH] Add comment per review feedback

---
 pkg/kubelet/kubelet.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pkg/kubelet/kubelet.go b/pkg/kubelet/kubelet.go
index 4672f9c2636..79c02cfde1d 100644
--- a/pkg/kubelet/kubelet.go
+++ b/pkg/kubelet/kubelet.go
@@ -428,6 +428,12 @@ func NewMainKubelet(
 			imageBackOff,
 			serializeImagePulls,
 			enableCustomMetrics,
+			// If using "kubenet", the Kubernetes network plugin that wraps
+			// CNI's bridge plugin, it knows how to set the hairpin veth flag
+			// so we tell the container runtime to back away from setting it.
+			// If the kubelet is started with any other plugin we can't be
+			// sure it handles the hairpin case so we instruct the docker
+			// runtime to set the flag instead.
 			klet.hairpinMode == componentconfig.HairpinVeth && networkPluginName != "kubenet",
 			seccompProfileRoot,
 			containerRuntimeOptions...,