diff --git a/apis/v1alpha1/greptimedbcluster_types.go b/apis/v1alpha1/greptimedbcluster_types.go
index 7b022b4..8db5291 100644
--- a/apis/v1alpha1/greptimedbcluster_types.go
+++ b/apis/v1alpha1/greptimedbcluster_types.go
@@ -261,16 +261,16 @@ type GreptimeDBClusterSpec struct {
 	Base *PodTemplateSpec `json:"base,omitempty"`
 
 	// Frontend is the specification of frontend node.
-	// +required
-	Frontend *FrontendSpec `json:"frontend"`
+	// +optional
+	Frontend *FrontendSpec `json:"frontend,omitempty"`
 
 	// Meta is the specification of meta node.
-	// +required
-	Meta *MetaSpec `json:"meta"`
+	// +optional
+	Meta *MetaSpec `json:"meta,omitempty"`
 
 	// Datanode is the specification of datanode node.
-	// +required
-	Datanode *DatanodeSpec `json:"datanode"`
+	// +optional
+	Datanode *DatanodeSpec `json:"datanode,omitempty"`
 
 	// Flownode is the specification of flownode node.
 	// +optional
diff --git a/config/crd/resources/greptime.io_greptimedbclusters.yaml b/config/crd/resources/greptime.io_greptimedbclusters.yaml
index bf6a528..96dd4d3 100644
--- a/config/crd/resources/greptime.io_greptimedbclusters.yaml
+++ b/config/crd/resources/greptime.io_greptimedbclusters.yaml
@@ -17279,10 +17279,6 @@ spec:
                         type: object
                     type: object
                 type: object
-            required:
-            - datanode
-            - frontend
-            - meta
             type: object
           status:
             properties:
diff --git a/manifests/bundle.yaml b/manifests/bundle.yaml
index 149c724..5359f4a 100644
--- a/manifests/bundle.yaml
+++ b/manifests/bundle.yaml
@@ -17285,10 +17285,6 @@ spec:
                         type: object
                     type: object
                 type: object
-            required:
-            - datanode
-            - frontend
-            - meta
             type: object
           status:
             properties:
diff --git a/manifests/crds.yaml b/manifests/crds.yaml
index ca36d52..a52d945 100644
--- a/manifests/crds.yaml
+++ b/manifests/crds.yaml
@@ -17278,10 +17278,6 @@ spec:
                         type: object
                     type: object
                 type: object
-            required:
-            - datanode
-            - frontend
-            - meta
             type: object
           status:
             properties: