diff --git a/cluster/ubuntu-cluster/build.sh b/cluster/ubuntu-cluster/build.sh
index b4e6de967da..52896f509bc 100755
--- a/cluster/ubuntu-cluster/build.sh
+++ b/cluster/ubuntu-cluster/build.sh
@@ -14,7 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# simple use the sed to replace some ip settings on user's demand
+# Download the etcd, flannel, and K8s binaries automatically
 # Run as root only
 
 # author @resouer
@@ -51,10 +51,12 @@ if [ ! -f etcd.tar.gz ] ; then
 fi
 cp $ETCD/etcd $ETCD/etcdctl binaries
 
-# kuber
+# k8s
 echo "Download kubernetes release ..."
+
+K8S_V="v0.12.0"
 if [ ! -f kubernetes.tar.gz ] ; then
-    curl -L https://github.com/GoogleCloudPlatform/kubernetes/releases/download/v0.10.1/kubernetes.tar.gz -o kubernetes.tar.gz
+    curl -L https://github.com/GoogleCloudPlatform/kubernetes/releases/download/$K8S_V/kubernetes.tar.gz -o kubernetes.tar.gz
     tar xzf kubernetes.tar.gz
 fi
 pushd kubernetes/server
diff --git a/docs/getting-started-guides/ubuntu_multinodes_cluster.md b/docs/getting-started-guides/ubuntu_multinodes_cluster.md
index f75c866e61c..ba1173b94c4 100644
--- a/docs/getting-started-guides/ubuntu_multinodes_cluster.md
+++ b/docs/getting-started-guides/ubuntu_multinodes_cluster.md
@@ -20,10 +20,15 @@ This document describes how to deploy kubernetes on multiple ubuntu nodes, inclu
 On your laptop, copy `cluster/ubuntu-cluster` directory to your workspace.
 
 The `build.sh` will download and build all the needed binaries into `./binaries`.
+
+You can customize your etcd version or K8s version in the build.sh by changing  variable `ETCD_V` and `K8S_V`, default etcd version is 2.0.0 and K8s version is 0.12.0.
+
+
 ```
 $ cd cluster/ubuntu-cluster
 $ sudo ./build.sh
 ```
+
 Please copy all the files in `./binaries` into `/opt/bin` of every machine you want to run as Kubernetes cluster node.