In some scenarios (e.g. cilium), we rely on the internal DNS name
being available, but this isn't the case with gossip clusters.
nodeup can seed /etc/hosts for the control-plane nodes, breaking the
deadlock.
We don't call klog.InitFlags yet, because that will cause a flag
redefinition error until we get everyone to stop using glog. That
will happen when we update to k8s 1.13.