From 0f9d30dd27465f9af1527f471517588fe17b7424 Mon Sep 17 00:00:00 2001
From: Laurent Bernaille <laurent.bernaille@datadoghq.com>
Date: Sat, 8 Dec 2018 23:47:59 +0100
Subject: [PATCH] [kube-proxy/ipvs] Avoid unbinding multiple times for
 multiport svc

---
 pkg/proxy/ipvs/proxier.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkg/proxy/ipvs/proxier.go b/pkg/proxy/ipvs/proxier.go
index a7d55aabc7..c8366eaed6 100644
--- a/pkg/proxy/ipvs/proxier.go
+++ b/pkg/proxy/ipvs/proxier.go
@@ -1651,6 +1651,9 @@ func (proxier *Proxier) cleanLegacyService(activeServices map[string]bool, curre
 					klog.V(4).Infof("Unbinding address %s", addr)
 					if err := proxier.netlinkHandle.UnbindAddress(addr, DefaultDummyDevice); err != nil {
 						klog.Errorf("Failed to unbind service addr %s from dummy interface %s: %v", addr, DefaultDummyDevice, err)
+					} else {
+						// In case we delete a multi-port service, avoid trying to unbind multiple times
+						delete(legacyBindAddrs,addr)
 					}
 				}
 			}