delete admin.conf before running kubedm init

pkg/minikube/bootstrapper/kubeadm/kubeadm.go

@@ -165,6 +165,13 @@ func (k *Bootstrapper) StartCluster(cfg config.ClusterConfig) error {
 		glog.Infof("StartCluster complete in %s", time.Since(start))
 	}()
 
+	// Remove admin.conf from any previous run
+	c := exec.Command("/bin/bash", "-c", "sudo rm -f /etc/kubernetes/admin.conf")
+	_, err = k.c.RunCmd(c)
+	if err != nil {
+		return errors.Wrap(err, "deleting admin.conf")
+	}
+
 	version, err := util.ParseKubernetesVersion(cfg.KubernetesConfig.KubernetesVersion)
 	if err != nil {
 		return errors.Wrap(err, "parsing kubernetes version")
@@ -202,7 +209,7 @@ func (k *Bootstrapper) StartCluster(cfg config.ClusterConfig) error {
 
 	}
 
-	c := exec.Command("/bin/bash", "-c", fmt.Sprintf("%s init --config %s %s --ignore-preflight-errors=%s", bsutil.InvokeKubeadm(cfg.KubernetesConfig.KubernetesVersion), bsutil.KubeadmYamlPath, extraFlags, strings.Join(ignore, ",")))
+	c = exec.Command("/bin/bash", "-c", fmt.Sprintf("%s init --config %s %s --ignore-preflight-errors=%s", bsutil.InvokeKubeadm(cfg.KubernetesConfig.KubernetesVersion), bsutil.KubeadmYamlPath, extraFlags, strings.Join(ignore, ",")))
 	rr, err := k.c.RunCmd(c)
 	if err != nil {
 		return errors.Wrapf(err, "init failed. output: %q", rr.Output())