From 2c0b3da430bd3880a2b8dc2938716f65080e830a Mon Sep 17 00:00:00 2001 From: Derek McQuay Date: Tue, 31 Jan 2017 15:42:46 -0800 Subject: [PATCH] kubeadm: preflight check for incorrect FQDN? --- cmd/kubeadm/app/preflight/checks.go | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/cmd/kubeadm/app/preflight/checks.go b/cmd/kubeadm/app/preflight/checks.go index 2d3b4d5107e..2cbc683176b 100644 --- a/cmd/kubeadm/app/preflight/checks.go +++ b/cmd/kubeadm/app/preflight/checks.go @@ -243,6 +243,10 @@ func (hc HostnameCheck) Check() (warnings, errors []error) { for _, msg := range validation.ValidateNodeName(hostname, false) { errors = append(errors, fmt.Errorf("hostname \"%s\" %s", hostname, msg)) } + addr, err := net.LookupHost(hostname) + if addr == nil || err != nil { + errors = append(errors, fmt.Errorf("hostname \"%s\" %s", hostname, err)) + } return nil, errors }