diff --git a/examples/bare-metal/cluster-with-local-artifacts.yaml b/examples/bare-metal/cluster-with-local-artifacts.yaml
index b7c58ef8..8450a46e 100644
--- a/examples/bare-metal/cluster-with-local-artifacts.yaml
+++ b/examples/bare-metal/cluster-with-local-artifacts.yaml
@@ -2,7 +2,8 @@ cluster:
   name: mycluster # name of the cluster
   artifact:
     local: "/path/to/greptime"
-  frontend: {}
+  frontend:
+    replicas: 1
   datanode:
     replicas: 3
     rpcAddr: 0.0.0.0:14100
diff --git a/examples/bare-metal/cluster.yaml b/examples/bare-metal/cluster.yaml
index f600699f..04d8b6eb 100644
--- a/examples/bare-metal/cluster.yaml
+++ b/examples/bare-metal/cluster.yaml
@@ -2,7 +2,8 @@ cluster:
   name: mycluster # name of the cluster
   artifact:
     version: v0.2.0-nightly-20230403
-  frontend: {}
+  frontend:
+    replicas: 1
   datanode:
     replicas: 3
     rpcAddr: 0.0.0.0:14100