diff --git a/ray-operator/api/raycluster/v1alpha1/doc.go b/ray-operator/api/raycluster/v1alpha1/doc.go
new file mode 100644
index 00000000000..5027bb804fd
--- /dev/null
+++ b/ray-operator/api/raycluster/v1alpha1/doc.go
@@ -0,0 +1,2 @@
+// +groupName=ray.io
+package v1alpha1
diff --git a/ray-operator/api/raycluster/v1alpha1/raycluster_types.go b/ray-operator/api/raycluster/v1alpha1/raycluster_types.go
index 19c45e12b82..9f9b1690bb3 100644
--- a/ray-operator/api/raycluster/v1alpha1/raycluster_types.go
+++ b/ray-operator/api/raycluster/v1alpha1/raycluster_types.go
@@ -103,6 +103,7 @@ const (
 // RayCluster is the Schema for the RayClusters API
 //+kubebuilder:object:root=true
 //+kubebuilder:subresource:status
+//+genclient
 type RayCluster struct {
 	// Standard object metadata.
 	metav1.TypeMeta   `json:",inline"`
diff --git a/ray-operator/api/raycluster/v1alpha1/register.go b/ray-operator/api/raycluster/v1alpha1/register.go
new file mode 100644
index 00000000000..2dfd631ebb5
--- /dev/null
+++ b/ray-operator/api/raycluster/v1alpha1/register.go
@@ -0,0 +1,12 @@
+package v1alpha1
+
+import (
+	"k8s.io/apimachinery/pkg/runtime/schema"
+)
+
+// SchemeGroupVersion is group version used to register these objects.
+var SchemeGroupVersion = GroupVersion
+
+func Resource(resource string) schema.GroupResource {
+	return SchemeGroupVersion.WithResource(resource).GroupResource()
+}
diff --git a/ray-operator/go.mod b/ray-operator/go.mod
index 426a6347558..ee787f55f8e 100644
--- a/ray-operator/go.mod
+++ b/ray-operator/go.mod
@@ -13,4 +13,5 @@ require (
 	k8s.io/client-go v0.19.14
 	k8s.io/utils v0.0.0-20200912215256-4140de9c8800
 	sigs.k8s.io/controller-runtime v0.7.2
+	k8s.io/code-generator v0.19.14
 )
diff --git a/ray-operator/go.sum b/ray-operator/go.sum
index 0c3fceb8090..a0efa9754c7 100644
--- a/ray-operator/go.sum
+++ b/ray-operator/go.sum
@@ -650,6 +650,8 @@ k8s.io/client-go v0.19.2/go.mod h1:S5wPhCqyDNAlzM9CnEdgTGV4OqhsW3jGO1UM1epwfJA=
 k8s.io/client-go v0.19.14 h1:D3V4mC6lQN3ZaABhOznxZXSsxMR5cdChjeMP4/pY4H8=
 k8s.io/client-go v0.19.14/go.mod h1:iWwXK/etTTPyssCycvgdQ9d6i0k93HXLtksUQ6A67WE=
 k8s.io/code-generator v0.19.2/go.mod h1:moqLn7w0t9cMs4+5CQyxnfA/HV8MF6aAVENF+WZZhgk=
+k8s.io/code-generator v0.19.14 h1:EFU42Hj0+FBZciWedyRtFHsPu75IaWca0slGB1LlBqk=
+k8s.io/code-generator v0.19.14/go.mod h1:ADrDvaUQWGn4a8lX0ONtzb7uFmDRQOMSYIMk1qWIAx8=
 k8s.io/component-base v0.19.2 h1:jW5Y9RcZTb79liEhW3XDVTW7MuvEGP0tQZnfSX6/+gs=
 k8s.io/component-base v0.19.2/go.mod h1:g5LrsiTiabMLZ40AR6Hl45f088DevyGY+cCE2agEIVo=
 k8s.io/gengo v0.0.0-20200413195148-3a45101e95ac/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
diff --git a/ray-operator/hack/tools.go b/ray-operator/hack/tools.go
new file mode 100644
index 00000000000..95d87f442b4
--- /dev/null
+++ b/ray-operator/hack/tools.go
@@ -0,0 +1,15 @@
+//go:build tools
+// +build tools
+
+package tools
+
+// This package imports things required by this repository, to force `go mod` to see them as dependencies
+import (
+	_ "k8s.io/code-generator"
+	_ "k8s.io/code-generator/cmd/client-gen"
+	_ "k8s.io/code-generator/cmd/deepcopy-gen"
+	_ "k8s.io/code-generator/cmd/defaulter-gen"
+	_ "k8s.io/code-generator/cmd/informer-gen"
+	_ "k8s.io/code-generator/cmd/lister-gen"
+	_ "k8s.io/code-generator/cmd/openapi-gen"
+)
diff --git a/ray-operator/hack/update-codegen.sh b/ray-operator/hack/update-codegen.sh
new file mode 100755
index 00000000000..de712979fb9
--- /dev/null
+++ b/ray-operator/hack/update-codegen.sh
@@ -0,0 +1,54 @@
+#!/bin/bash
+
+# This shell is used to auto generate some useful tools for k8s, such as clientset, lister, informer and so on.
+# We don't use this tool to generate deepcopy because kubebuilder (controller-tools) has coverred that part.
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+SCRIPT_ROOT=$(dirname "${BASH_SOURCE[0]}")/..
+ROOT_PKG=github.com/ray-project/kuberay/ray-operator
+
+# Grab code-generator version from go.sum
+CODEGEN_VERSION=$(grep 'k8s.io/code-generator' go.sum | awk '{print $2}' | sed 's/\/go.mod//g' | head -1)
+CODEGEN_PKG=$(echo `go env GOPATH`"/pkg/mod/k8s.io/code-generator@${CODEGEN_VERSION}")
+
+if [[ ! -d ${CODEGEN_PKG} ]]; then
+    echo "${CODEGEN_PKG} is missing. Running 'go mod download'."
+    go mod download
+fi
+
+echo ">> Using ${CODEGEN_PKG}"
+
+# code-generator does work with go.mod but makes assumptions about
+# the project living in `$GOPATH/src`. To work around this and support
+# any location; create a temporary directory, use this as an output
+# base, and copy everything back once generated.
+TEMP_DIR=$(mktemp -d)
+cleanup() {
+    echo ">> Removing ${TEMP_DIR}"
+#    rm -rf ${TEMP_DIR}
+}
+trap "cleanup" EXIT SIGINT
+
+echo ">> Temporary output directory ${TEMP_DIR}"
+
+# Ensure we can execute.
+chmod +x ${CODEGEN_PKG}/generate-groups.sh
+
+# generate the code with:
+# --output-base    because this script should also be able to run inside the vendor dir of
+#                  k8s.io/kubernetes. The output-base is needed for the generators to output into the vendor dir
+#                  instead of the $GOPATH directly. For normal projects this can be dropped.
+#
+cd ${SCRIPT_ROOT}
+${CODEGEN_PKG}/generate-groups.sh "client,informer,lister" \
+ github.com/ray-project/kuberay/ray-operator/pkg/client github.com/ray-project/kuberay/ray-operator/api \
+ raycluster:v1alpha1 \
+ --output-base "${TEMP_DIR}" \
+ --go-header-file hack/boilerplate.go.txt
+
+
+# Copy everything back.
+cp -a "${TEMP_DIR}/${ROOT_PKG}/." "${SCRIPT_ROOT}/"
diff --git a/ray-operator/hack/verify-codegen.sh b/ray-operator/hack/verify-codegen.sh
new file mode 100644
index 00000000000..9f5082dd717
--- /dev/null
+++ b/ray-operator/hack/verify-codegen.sh
@@ -0,0 +1,34 @@
+#!/bin/bash
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+SCRIPT_ROOT=$(dirname "${BASH_SOURCE[0]}")/..
+
+DIFFROOT="${SCRIPT_ROOT}/pkg"
+TMP_DIFFROOT="${SCRIPT_ROOT}/_tmp/pkg"
+_tmp="${SCRIPT_ROOT}/_tmp"
+
+cleanup() {
+  rm -rf "${_tmp}"
+}
+trap "cleanup" EXIT SIGINT
+
+cleanup
+
+mkdir -p "${TMP_DIFFROOT}"
+cp -a "${DIFFROOT}"/* "${TMP_DIFFROOT}"
+
+"${SCRIPT_ROOT}/hack/update-codegen.sh"
+echo "diffing ${DIFFROOT} against freshly generated codegen"
+ret=0
+diff -Naupr "${DIFFROOT}" "${TMP_DIFFROOT}" || ret=$?
+cp -a "${TMP_DIFFROOT}"/* "${DIFFROOT}"
+if [[ $ret -eq 0 ]]
+then
+  echo "${DIFFROOT} up to date."
+else
+  echo "${DIFFROOT} is out of date. Please run hack/update-codegen.sh"
+  exit 1
+fi