Switch to etcd 2

cluster/libvirt-coreos/util.sh

@@ -183,12 +183,13 @@ function wait-cluster-readiness {
 function kube-up {
   detect-master
   detect-minions
+  get-kubeconfig-bearertoken
   initialize-pool keep_base_image
   initialize-network
 
   readonly ssh_keys="$(cat ~/.ssh/id_*.pub | sed 's/^/  - /')"
   readonly kubernetes_dir="$POOL_PATH/kubernetes"
-  readonly discovery=$(curl -s https://discovery.etcd.io/new)
+  readonly discovery=$(curl -s https://discovery.etcd.io/new?size=$(($NUM_MINIONS+1)))
 
   readonly machines=$(join , "${KUBE_MINION_IP_ADDRESSES[@]}")