From 82206578ccc2b9d4f5fb2b493c4a0ca077d463e3 Mon Sep 17 00:00:00 2001
From: Humberto Nanni <44509485+hnanni@users.noreply.github.com>
Date: Tue, 3 Dec 2019 11:17:11 -0600
Subject: [PATCH] Update checks.go

match https://github.com/kubernetes/release/pull/653 add
---
 cmd/kubeadm/app/preflight/checks.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/cmd/kubeadm/app/preflight/checks.go b/cmd/kubeadm/app/preflight/checks.go
index 9c4c49f3022b..5c9aa438c8c3 100644
--- a/cmd/kubeadm/app/preflight/checks.go
+++ b/cmd/kubeadm/app/preflight/checks.go
@@ -1009,6 +1009,7 @@ func addCommonChecks(execer utilsexec.Interface, k8sVersion string, nodeReg *kub
 			FileContentCheck{Path: bridgenf, Content: []byte{'1'}},
 			FileContentCheck{Path: ipv4Forward, Content: []byte{'1'}},
 			SwapCheck{},
+			InPathCheck{executable: "conntrack", mandatory: true, exec: execer},
 			InPathCheck{executable: "ip", mandatory: true, exec: execer},
 			InPathCheck{executable: "iptables", mandatory: true, exec: execer},
 			InPathCheck{executable: "mount", mandatory: true, exec: execer},