diff --git a/examples/raft-kv-memstore/src/client.rs b/examples/raft-kv-memstore/src/client.rs
index 10eff8b3b..d0c852ee7 100644
--- a/examples/raft-kv-memstore/src/client.rs
+++ b/examples/raft-kv-memstore/src/client.rs
@@ -74,7 +74,7 @@ impl ExampleClient {
     /// Then setup replication with [`add_learner`].
     /// Then make the new node a member with [`change_membership`].
     pub async fn init(&self) -> Result<(), typ::RPCError<typ::InitializeError>> {
-        self.do_send_rpc_to_leader("init", Some(&Empty {})).await
+        self.do_send_rpc_to_leader("init", Some(&Vec::<(NodeId, String)>::new())).await
     }
 
     /// Add a node as learner.
diff --git a/examples/raft-kv-memstore/src/network/management.rs b/examples/raft-kv-memstore/src/network/management.rs
index 1e20cf0f9..a59faf2c1 100644
--- a/examples/raft-kv-memstore/src/network/management.rs
+++ b/examples/raft-kv-memstore/src/network/management.rs
@@ -36,11 +36,18 @@ pub async fn change_membership(app: Data<App>, req: Json<BTreeSet<NodeId>>) -> a
     Ok(Json(res))
 }
 
-/// Initialize a single-node cluster.
+/// Initialize a single-node cluster if the `req` is empty vec.
+/// Otherwise initialize a cluster with the `req` specified vec of node-id and node-address
 #[post("/init")]
-pub async fn init(app: Data<App>) -> actix_web::Result<impl Responder> {
+pub async fn init(app: Data<App>, req: Json<Vec<(NodeId, String)>>) -> actix_web::Result<impl Responder> {
     let mut nodes = BTreeMap::new();
-    nodes.insert(app.id, BasicNode { addr: app.addr.clone() });
+    if req.0.is_empty() {
+        nodes.insert(app.id, BasicNode { addr: app.addr.clone() });
+    } else {
+        for (id, addr) in req.0.into_iter() {
+            nodes.insert(id, BasicNode { addr });
+        }
+    };
     let res = app.raft.initialize(nodes).await;
     Ok(Json(res))
 }
diff --git a/examples/raft-kv-memstore/test-cluster.sh b/examples/raft-kv-memstore/test-cluster.sh
index 16762a86f..bf9adfa3f 100755
--- a/examples/raft-kv-memstore/test-cluster.sh
+++ b/examples/raft-kv-memstore/test-cluster.sh
@@ -50,7 +50,7 @@ kill
 
 sleep 1
 
-echo "Start 3 uninitialized raft-key-value servers..."
+echo "Start 5 uninitialized raft-key-value servers..."
 
 nohup ./target/debug/raft-key-value  --id 1 --http-addr 127.0.0.1:21001 > n1.log &
 sleep 1
@@ -65,10 +65,22 @@ sleep 1
 echo "Server 3 started"
 sleep 1
 
-echo "Initialize server 1 as a single-node cluster"
+nohup ./target/debug/raft-key-value  --id 4 --http-addr 127.0.0.1:21004 > n4.log &
+sleep 1
+echo "Server 4 started"
+sleep 1
+
+nohup ./target/debug/raft-key-value  --id 5 --http-addr 127.0.0.1:21005 > n5.log &
+sleep 1
+echo "Server 5 started"
+sleep 1
+
+echo "Initialize servers 1,2,3 as a 3-nodes cluster"
 sleep 2
 echo
-rpc 21001/init '{}'
+
+rpc 21001/init '[[1, "127.0.0.1:21001"], [2, "127.0.0.1:21002"], [3, "127.0.0.1:21003"]]'
+# if you want to initialize server 1 as a single cluster, use `rpc 21001/init '[]'` or `rpc 21001/init '[[1, "127.0.0.1:21001"]]'`
 
 echo "Server 1 is a leader now"
 
@@ -81,16 +93,16 @@ rpc 21001/metrics
 sleep 1
 
 
-echo "Adding node 2 and node 3 as learners, to receive log from leader node 1"
+echo "Adding node 4 and node 5 as learners, to receive log from leader node 1"
 
 sleep 1
 echo
-rpc 21001/add-learner       '[2, "127.0.0.1:21002"]'
-echo "Node 2 added as learner"
+rpc 21001/add-learner       '[4, "127.0.0.1:21004"]'
+echo "Node 4 added as learner"
 sleep 1
 echo
-rpc 21001/add-learner       '[3, "127.0.0.1:21003"]'
-echo "Node 3 added as learner"
+rpc 21001/add-learner       '[5, "127.0.0.1:21005"]'
+echo "Node 5 added as learner"
 sleep 1
 
 echo "Get metrics from the leader, after adding 2 learners"
@@ -99,11 +111,11 @@ echo
 rpc 21001/metrics
 sleep 1
 
-echo "Changing membership from [1] to 3 nodes cluster: [1, 2, 3]"
+echo "Changing membership from [1, 2, 3] to 5 nodes cluster: [1, 2, 3, 4, 5]"
 echo
-rpc 21001/change-membership '[1, 2, 3]'
+rpc 21001/change-membership '[1, 2, 3, 4, 5]'
 sleep 1
-echo 'Membership changed to [1, 2, 3]'
+echo 'Membership changed to [1, 2, 3, 4, 5]'
 sleep 1
 
 echo "Get metrics from the leader again"
@@ -133,7 +145,7 @@ echo
 rpc 21003/read  '"foo"'
 
 
-echo "Changing membership from [1,2,3] to [3]"
+echo "Changing membership from [1,2,3, 4, 5] to [3]"
 echo
 rpc 21001/change-membership '[3]'
 sleep 1