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Merge pull request #96860 from pacoxu/fix/96833

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fix kube-dns federations check in kubeadm upgrade dns check preflight
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Kubernetes Prow Robot 2020-12-08 20:04:07 -08:00 committed by GitHub
commit 03aba080a6
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1 changed files with 5 additions and 5 deletions
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10
cmd/kubeadm/app/phases/upgrade/preflight.go
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@ -126,17 +126,17 @@ func checkMigration(client clientset.Interface) error {
// checkKubeDNSConfigMap checks if the translation of kube-dns to CoreDNS ConfigMap is supported
func checkKubeDNSConfigMap(client clientset.Interface) error {
kubeDNSConfigMap, err := client.CoreV1().ConfigMaps(metav1.NamespaceSystem).Get(context.TODO(), kubeadmconstants.KubeDNSConfigMap, metav1.GetOptions{})
if err != nil && !apierrors.IsNotFound(err) {
if err != nil {
if apierrors.IsNotFound(err) {
return nil
}
return err
}
if kubeDNSConfigMap == nil {
return nil
}
if _, ok := kubeDNSConfigMap.Data["federations"]; ok {
klog.V(1).Infoln("CoreDNS no longer supports Federation and " +
"hence will not translate the federation data from kube-dns to CoreDNS ConfigMap")
return errors.Wrap(err, "kube-dns Federation data will not be translated")
return errors.New("kube-dns Federation data will not be translated")
}
return nil
}