diff --git a/apiserver/pkg/util/cluster.go b/apiserver/pkg/util/cluster.go
index e1679ea569..d8d6716578 100644
--- a/apiserver/pkg/util/cluster.go
+++ b/apiserver/pkg/util/cluster.go
@@ -418,6 +418,7 @@ func constructRayImage(containerImage string, version string) string {
 func buildWorkerPodTemplate(imageVersion string, envs *api.EnvironmentVariables, spec *api.WorkerGroupSpec, computeRuntime *api.ComputeTemplate) (*corev1.PodTemplateSpec, error) {
 	// If user doesn't provide the image, let's use the default image instead.
 	// TODO: verify the versions in the range
+	fmt.Println(spec)
 	image := constructRayImage(RayClusterDefaultImageRepository, imageVersion)
 	if len(spec.Image) != 0 {
 		image = spec.Image
@@ -441,6 +442,30 @@ func buildWorkerPodTemplate(imageVersion string, envs *api.EnvironmentVariables,
 		return nil, err
 	}
 
+	// Build init containers
+	var initContainers []corev1.Container
+	for _, initContainerSpec := range spec.InitContainers {
+		// Map WorkerGroupSpec.InitContainer to corev1.Container
+		initContainer := corev1.Container{
+			Name:            initContainerSpec.Name,
+			Image:           initContainerSpec.Image,
+			ImagePullPolicy: corev1.PullIfNotPresent, // Default to IfNotPresent
+
+			// Add volumes
+			VolumeMounts: buildVolumeMounts(initContainerSpec.Volumes),
+
+			// Add environment variables, if present
+			Env: convertEnvironmentVariables(initContainerSpec.Environment),
+		}
+
+		// Set image pull policy if explicitly given
+		if len(initContainerSpec.ImagePullPolicy) > 0 && strings.ToLower(initContainerSpec.ImagePullPolicy) == "always" {
+			initContainer.ImagePullPolicy = corev1.PullAlways
+		}
+
+		initContainers = append(initContainers, initContainer)
+	}
+
 	podTemplateSpec := corev1.PodTemplateSpec{
 		ObjectMeta: metav1.ObjectMeta{
 			Annotations: buildNodeGroupAnnotations(computeRuntime, spec.Image),
@@ -543,7 +568,8 @@ func buildWorkerPodTemplate(imageVersion string, envs *api.EnvironmentVariables,
 					SecurityContext: buildSecurityContext(spec.SecurityContext),
 				},
 			},
-			Volumes: vols,
+			InitContainers: initContainers,
+			Volumes:        vols,
 		},
 	}
 
diff --git a/apiserver/test/cluster/cluster/cluster b/apiserver/test/cluster/cluster/cluster
index efa533abde..ca238306cf 100644
--- a/apiserver/test/cluster/cluster/cluster
+++ b/apiserver/test/cluster/cluster/cluster
@@ -42,6 +42,32 @@ curl -X POST 'localhost:8888/apis/v1/namespaces/default/clusters' \
             "source": "ray-job-code-sample",
             "items": {"sample_code.py" : "sample_code.py"}
           }
+        ],
+        "initContainers": [
+          {
+            "name": "init-container-demo",
+            "image": "busybox",
+            "volumes": [
+              {
+                "mountPath": "/data",
+                "volumeType": "PERSISTENT_VOLUME_CLAIM",
+                "name": "init-data-volume",
+                "source": "data-pvc",
+                "readOnly": false,
+                "accessMode": "RWO",
+                "hostPathType": "DIRECTORY",
+                "storageClassName": "standard",
+                "storage": "1Gi"
+              }
+            ],
+            "environment": {
+              "values": {
+                "INIT_JOB_TYPE": "worker",
+                "INIT_COMMAND":   "echo Initializing worker node; sleep 5",
+              }
+            },
+            "imagePullPolicy": "IfNotPresent"
+          }
         ]
       }
     ]
diff --git a/apiserver/test/e2e/cluster_server_e2e_test.go b/apiserver/test/e2e/cluster_server_e2e_test.go
index 6949865814..40e113d453 100644
--- a/apiserver/test/e2e/cluster_server_e2e_test.go
+++ b/apiserver/test/e2e/cluster_server_e2e_test.go
@@ -426,6 +426,62 @@ func TestCreateClusterEndpoint(t *testing.T) {
 				HTTPStatusCode: http.StatusBadRequest,
 			},
 		},
+		{
+			Name: "Create cluster with init container in worker group",
+			Input: &api.CreateClusterRequest{
+				Cluster: &api.Cluster{
+					Name:        tCtx.GetNextName(),
+					Namespace:   tCtx.GetNamespaceName(),
+					User:        "boris",
+					Version:     tCtx.GetRayVersion(),
+					Environment: api.Cluster_DEV,
+					ClusterSpec: &api.ClusterSpec{
+						HeadGroupSpec: &api.HeadGroupSpec{
+							ComputeTemplate: tCtx.GetComputeTemplateName(),
+							Image:           tCtx.GetRayImage(),
+							ServiceType:     "NodePort",
+							RayStartParams: map[string]string{
+								"dashboard-host":      "0.0.0.0",
+								"metrics-export-port": "8080",
+							},
+						},
+						WorkerGroupSpec: []*api.WorkerGroupSpec{
+							{
+								GroupName:       "small-wg",
+								ComputeTemplate: tCtx.GetComputeTemplateName(),
+								Image:           tCtx.GetRayImage(),
+								Replicas:        1,
+								MinReplicas:     1,
+								MaxReplicas:     5,
+								InitContainers: []*api.InitContainer{
+									{
+										Name:  "init-container-demo",
+										Image: "busybox",
+										Volumes: []*api.Volume{
+											{
+												MountPath:  "/data",
+												VolumeType: api.Volume_PERSISTENT_VOLUME_CLAIM,
+												Name:       "init-data-volume",
+												Source:     "data-pvc",
+												ReadOnly:   false,
+											},
+										},
+										Environment: &api.EnvironmentVariables{
+											Values: map[string]string{
+												"INIT_TASK_TYPE": "worker",
+												"INIT_COMMAND":   "echo Initializing worker node; sleep 5",
+											},
+										},
+									},
+								},
+							},
+						},
+					},
+				},
+				Namespace: tCtx.GetNamespaceName(),
+			},
+			ExpectedError: nil,
+		},
 	}
 	// Execute tests sequentially
 	for _, tc := range tests {
diff --git a/proto/cluster.proto b/proto/cluster.proto
index fba86a5fd6..0ba00cd64f 100644
--- a/proto/cluster.proto
+++ b/proto/cluster.proto
@@ -352,6 +352,21 @@ message WorkerGroupSpec {
   string imagePullPolicy = 14;
   // Optional. Configure the security context for the worker container for debugging etc.
   SecurityContext security_context = 15;
+  // Optional. init container specs
+  repeated InitContainer init_containers = 16;
+}
+
+message InitContainer {
+  // Required. Group name of the current worker group
+  string name = 1 [(google.api.field_behavior) = REQUIRED];
+  // Required. This field will be used to retrieve right init container
+  string image = 2 [(google.api.field_behavior) = REQUIRED];
+  // Optional. The volumes mount to init container
+  repeated Volume volumes = 3;
+  // Optional. Environment variables for init container
+  EnvironmentVariables environment = 5;
+  // Optional image pull policy We only support Always and ifNotPresent
+  string imagePullPolicy = 6;
 }
 
 message ClusterEvent {
diff --git a/proto/go_client/cluster.pb.go b/proto/go_client/cluster.pb.go
index acce2b2f7c..6fa0d29391 100644
--- a/proto/go_client/cluster.pb.go
+++ b/proto/go_client/cluster.pb.go
@@ -1596,6 +1596,8 @@ type WorkerGroupSpec struct {
 	ImagePullPolicy string `protobuf:"bytes,14,opt,name=imagePullPolicy,proto3" json:"imagePullPolicy,omitempty"`
 	// Optional. Configure the security context for the worker container for debugging etc.
 	SecurityContext *SecurityContext `protobuf:"bytes,15,opt,name=security_context,json=securityContext,proto3" json:"security_context,omitempty"`
+	// Optional. init container specs
+	InitContainers []*InitContainer `protobuf:"bytes,16,rep,name=init_containers,json=initContainers,proto3" json:"init_containers,omitempty"`
 }
 
 func (x *WorkerGroupSpec) Reset() {
@@ -1735,6 +1737,97 @@ func (x *WorkerGroupSpec) GetSecurityContext() *SecurityContext {
 	return nil
 }
 
+func (x *WorkerGroupSpec) GetInitContainers() []*InitContainer {
+	if x != nil {
+		return x.InitContainers
+	}
+	return nil
+}
+
+type InitContainer struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// Required. Group name of the current worker group
+	Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+	// Required. This field will be used to retrieve right init container
+	Image string `protobuf:"bytes,2,opt,name=image,proto3" json:"image,omitempty"`
+	// Optional. The volumes mount to init container
+	Volumes []*Volume `protobuf:"bytes,3,rep,name=volumes,proto3" json:"volumes,omitempty"`
+	// Optional. Environment variables for init container
+	Environment *EnvironmentVariables `protobuf:"bytes,5,opt,name=environment,proto3" json:"environment,omitempty"`
+	// Optional image pull policy We only support Always and ifNotPresent
+	ImagePullPolicy string `protobuf:"bytes,6,opt,name=imagePullPolicy,proto3" json:"imagePullPolicy,omitempty"`
+}
+
+func (x *InitContainer) Reset() {
+	*x = InitContainer{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_cluster_proto_msgTypes[17]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *InitContainer) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*InitContainer) ProtoMessage() {}
+
+func (x *InitContainer) ProtoReflect() protoreflect.Message {
+	mi := &file_cluster_proto_msgTypes[17]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use InitContainer.ProtoReflect.Descriptor instead.
+func (*InitContainer) Descriptor() ([]byte, []int) {
+	return file_cluster_proto_rawDescGZIP(), []int{17}
+}
+
+func (x *InitContainer) GetName() string {
+	if x != nil {
+		return x.Name
+	}
+	return ""
+}
+
+func (x *InitContainer) GetImage() string {
+	if x != nil {
+		return x.Image
+	}
+	return ""
+}
+
+func (x *InitContainer) GetVolumes() []*Volume {
+	if x != nil {
+		return x.Volumes
+	}
+	return nil
+}
+
+func (x *InitContainer) GetEnvironment() *EnvironmentVariables {
+	if x != nil {
+		return x.Environment
+	}
+	return nil
+}
+
+func (x *InitContainer) GetImagePullPolicy() string {
+	if x != nil {
+		return x.ImagePullPolicy
+	}
+	return ""
+}
+
 type ClusterEvent struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -1763,7 +1856,7 @@ type ClusterEvent struct {
 func (x *ClusterEvent) Reset() {
 	*x = ClusterEvent{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_cluster_proto_msgTypes[17]
+		mi := &file_cluster_proto_msgTypes[18]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1776,7 +1869,7 @@ func (x *ClusterEvent) String() string {
 func (*ClusterEvent) ProtoMessage() {}
 
 func (x *ClusterEvent) ProtoReflect() protoreflect.Message {
-	mi := &file_cluster_proto_msgTypes[17]
+	mi := &file_cluster_proto_msgTypes[18]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1789,7 +1882,7 @@ func (x *ClusterEvent) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ClusterEvent.ProtoReflect.Descriptor instead.
 func (*ClusterEvent) Descriptor() ([]byte, []int) {
-	return file_cluster_proto_rawDescGZIP(), []int{17}
+	return file_cluster_proto_rawDescGZIP(), []int{18}
 }
 
 func (x *ClusterEvent) GetId() string {
@@ -2140,7 +2233,7 @@ var file_cluster_proto_rawDesc = []byte{
 	0x61, 0x62, 0x65, 0x6c, 0x73, 0x45, 0x6e, 0x74, 0x72, 0x79, 0x12, 0x10, 0x0a, 0x03, 0x6b, 0x65,
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 	0x76, 0x61, 0x6c, 0x75, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x05, 0x76, 0x61, 0x6c,
-	0x75, 0x65, 0x3a, 0x02, 0x38, 0x01, 0x22, 0xb1, 0x07, 0x0a, 0x0f, 0x57, 0x6f, 0x72, 0x6b, 0x65,
+	0x75, 0x65, 0x3a, 0x02, 0x38, 0x01, 0x22, 0xf0, 0x07, 0x0a, 0x0f, 0x57, 0x6f, 0x72, 0x6b, 0x65,
 	0x72, 0x47, 0x72, 0x6f, 0x75, 0x70, 0x53, 0x70, 0x65, 0x63, 0x12, 0x22, 0x0a, 0x0a, 0x67, 0x72,
 	0x6f, 0x75, 0x70, 0x5f, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x42, 0x03,
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@@ -2187,84 +2280,102 @@ var file_cluster_proto_rawDesc = []byte{
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-	0x2a, 0x2f, 0x2f, 0x61, 0x70, 0x69, 0x73, 0x2f, 0x76, 0x31, 0x2f, 0x6e, 0x61, 0x6d, 0x65, 0x73,
-	0x70, 0x61, 0x63, 0x65, 0x73, 0x2f, 0x7b, 0x6e, 0x61, 0x6d, 0x65, 0x73, 0x70, 0x61, 0x63, 0x65,
-	0x7d, 0x2f, 0x63, 0x6c, 0x75, 0x73, 0x74, 0x65, 0x72, 0x73, 0x2f, 0x7b, 0x6e, 0x61, 0x6d, 0x65,
-	0x7d, 0x42, 0x54, 0x5a, 0x2e, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f,
-	0x72, 0x61, 0x79, 0x2d, 0x70, 0x72, 0x6f, 0x6a, 0x65, 0x63, 0x74, 0x2f, 0x6b, 0x75, 0x62, 0x65,
-	0x72, 0x61, 0x79, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x67, 0x6f, 0x5f, 0x63, 0x6c, 0x69,
-	0x65, 0x6e, 0x74, 0x92, 0x41, 0x21, 0x2a, 0x01, 0x01, 0x52, 0x1c, 0x0a, 0x07, 0x64, 0x65, 0x66,
-	0x61, 0x75, 0x6c, 0x74, 0x12, 0x11, 0x12, 0x0f, 0x0a, 0x0d, 0x1a, 0x0b, 0x2e, 0x61, 0x70, 0x69,
-	0x2e, 0x53, 0x74, 0x61, 0x74, 0x75, 0x73, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+	0x73, 0x2f, 0x7b, 0x6e, 0x61, 0x6d, 0x65, 0x7d, 0x42, 0x54, 0x5a, 0x2e, 0x67, 0x69, 0x74, 0x68,
+	0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x72, 0x61, 0x79, 0x2d, 0x70, 0x72, 0x6f, 0x6a, 0x65,
+	0x63, 0x74, 0x2f, 0x6b, 0x75, 0x62, 0x65, 0x72, 0x61, 0x79, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f,
+	0x2f, 0x67, 0x6f, 0x5f, 0x63, 0x6c, 0x69, 0x65, 0x6e, 0x74, 0x92, 0x41, 0x21, 0x2a, 0x01, 0x01,
+	0x52, 0x1c, 0x0a, 0x07, 0x64, 0x65, 0x66, 0x61, 0x75, 0x6c, 0x74, 0x12, 0x11, 0x12, 0x0f, 0x0a,
+	0x0d, 0x1a, 0x0b, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x53, 0x74, 0x61, 0x74, 0x75, 0x73, 0x62, 0x06,
+	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -2280,7 +2391,7 @@ func file_cluster_proto_rawDescGZIP() []byte {
 }
 
 var file_cluster_proto_enumTypes = make([]protoimpl.EnumInfo, 6)
-var file_cluster_proto_msgTypes = make([]protoimpl.MessageInfo, 29)
+var file_cluster_proto_msgTypes = make([]protoimpl.MessageInfo, 30)
 var file_cluster_proto_goTypes = []interface{}{
 	(EnvValueFrom_Source)(0),         // 0: proto.EnvValueFrom.Source
 	(Cluster_Environment)(0),         // 1: proto.Cluster.Environment
@@ -2305,38 +2416,39 @@ var file_cluster_proto_goTypes = []interface{}{
 	(*SecurityContext)(nil),          // 20: proto.SecurityContext
 	(*HeadGroupSpec)(nil),            // 21: proto.HeadGroupSpec
 	(*WorkerGroupSpec)(nil),          // 22: proto.WorkerGroupSpec
-	(*ClusterEvent)(nil),             // 23: proto.ClusterEvent
-	nil,                              // 24: proto.EnvironmentVariables.ValuesEntry
-	nil,                              // 25: proto.EnvironmentVariables.ValuesFromEntry
-	nil,                              // 26: proto.Cluster.AnnotationsEntry
-	nil,                              // 27: proto.Cluster.ServiceEndpointEntry
-	nil,                              // 28: proto.Volume.ItemsEntry
-	nil,                              // 29: proto.HeadGroupSpec.RayStartParamsEntry
-	nil,                              // 30: proto.HeadGroupSpec.AnnotationsEntry
-	nil,                              // 31: proto.HeadGroupSpec.LabelsEntry
-	nil,                              // 32: proto.WorkerGroupSpec.RayStartParamsEntry
-	nil,                              // 33: proto.WorkerGroupSpec.AnnotationsEntry
-	nil,                              // 34: proto.WorkerGroupSpec.LabelsEntry
-	(*timestamppb.Timestamp)(nil),    // 35: google.protobuf.Timestamp
-	(*emptypb.Empty)(nil),            // 36: google.protobuf.Empty
+	(*InitContainer)(nil),            // 23: proto.InitContainer
+	(*ClusterEvent)(nil),             // 24: proto.ClusterEvent
+	nil,                              // 25: proto.EnvironmentVariables.ValuesEntry
+	nil,                              // 26: proto.EnvironmentVariables.ValuesFromEntry
+	nil,                              // 27: proto.Cluster.AnnotationsEntry
+	nil,                              // 28: proto.Cluster.ServiceEndpointEntry
+	nil,                              // 29: proto.Volume.ItemsEntry
+	nil,                              // 30: proto.HeadGroupSpec.RayStartParamsEntry
+	nil,                              // 31: proto.HeadGroupSpec.AnnotationsEntry
+	nil,                              // 32: proto.HeadGroupSpec.LabelsEntry
+	nil,                              // 33: proto.WorkerGroupSpec.RayStartParamsEntry
+	nil,                              // 34: proto.WorkerGroupSpec.AnnotationsEntry
+	nil,                              // 35: proto.WorkerGroupSpec.LabelsEntry
+	(*timestamppb.Timestamp)(nil),    // 36: google.protobuf.Timestamp
+	(*emptypb.Empty)(nil),            // 37: google.protobuf.Empty
 }
 var file_cluster_proto_depIdxs = []int32{
 	16, // 0: proto.CreateClusterRequest.cluster:type_name -> proto.Cluster
 	16, // 1: proto.ListClustersResponse.clusters:type_name -> proto.Cluster
 	16, // 2: proto.ListAllClustersResponse.clusters:type_name -> proto.Cluster
 	0,  // 3: proto.EnvValueFrom.source:type_name -> proto.EnvValueFrom.Source
-	24, // 4: proto.EnvironmentVariables.values:type_name -> proto.EnvironmentVariables.ValuesEntry
-	25, // 5: proto.EnvironmentVariables.valuesFrom:type_name -> proto.EnvironmentVariables.ValuesFromEntry
+	25, // 4: proto.EnvironmentVariables.values:type_name -> proto.EnvironmentVariables.ValuesEntry
+	26, // 5: proto.EnvironmentVariables.valuesFrom:type_name -> proto.EnvironmentVariables.ValuesFromEntry
 	14, // 6: proto.AutoscalerOptions.envs:type_name -> proto.EnvironmentVariables
 	18, // 7: proto.AutoscalerOptions.volumes:type_name -> proto.Volume
 	1,  // 8: proto.Cluster.environment:type_name -> proto.Cluster.Environment
 	17, // 9: proto.Cluster.cluster_spec:type_name -> proto.ClusterSpec
-	26, // 10: proto.Cluster.annotations:type_name -> proto.Cluster.AnnotationsEntry
+	27, // 10: proto.Cluster.annotations:type_name -> proto.Cluster.AnnotationsEntry
 	14, // 11: proto.Cluster.envs:type_name -> proto.EnvironmentVariables
-	35, // 12: proto.Cluster.created_at:type_name -> google.protobuf.Timestamp
-	35, // 13: proto.Cluster.deleted_at:type_name -> google.protobuf.Timestamp
-	23, // 14: proto.Cluster.events:type_name -> proto.ClusterEvent
-	27, // 15: proto.Cluster.service_endpoint:type_name -> proto.Cluster.ServiceEndpointEntry
+	36, // 12: proto.Cluster.created_at:type_name -> google.protobuf.Timestamp
+	36, // 13: proto.Cluster.deleted_at:type_name -> google.protobuf.Timestamp
+	24, // 14: proto.Cluster.events:type_name -> proto.ClusterEvent
+	28, // 15: proto.Cluster.service_endpoint:type_name -> proto.Cluster.ServiceEndpointEntry
 	21, // 16: proto.ClusterSpec.head_group_spec:type_name -> proto.HeadGroupSpec
 	22, // 17: proto.ClusterSpec.worker_group_spec:type_name -> proto.WorkerGroupSpec
 	15, // 18: proto.ClusterSpec.autoscalerOptions:type_name -> proto.AutoscalerOptions
@@ -2344,39 +2456,42 @@ var file_cluster_proto_depIdxs = []int32{
 	3,  // 20: proto.Volume.host_path_type:type_name -> proto.Volume.HostPathType
 	4,  // 21: proto.Volume.mount_propagation_mode:type_name -> proto.Volume.MountPropagationMode
 	5,  // 22: proto.Volume.accessMode:type_name -> proto.Volume.AccessMode
-	28, // 23: proto.Volume.items:type_name -> proto.Volume.ItemsEntry
+	29, // 23: proto.Volume.items:type_name -> proto.Volume.ItemsEntry
 	19, // 24: proto.SecurityContext.capabilities:type_name -> proto.Capabilities
-	29, // 25: proto.HeadGroupSpec.ray_start_params:type_name -> proto.HeadGroupSpec.RayStartParamsEntry
+	30, // 25: proto.HeadGroupSpec.ray_start_params:type_name -> proto.HeadGroupSpec.RayStartParamsEntry
 	18, // 26: proto.HeadGroupSpec.volumes:type_name -> proto.Volume
 	14, // 27: proto.HeadGroupSpec.environment:type_name -> proto.EnvironmentVariables
-	30, // 28: proto.HeadGroupSpec.annotations:type_name -> proto.HeadGroupSpec.AnnotationsEntry
-	31, // 29: proto.HeadGroupSpec.labels:type_name -> proto.HeadGroupSpec.LabelsEntry
+	31, // 28: proto.HeadGroupSpec.annotations:type_name -> proto.HeadGroupSpec.AnnotationsEntry
+	32, // 29: proto.HeadGroupSpec.labels:type_name -> proto.HeadGroupSpec.LabelsEntry
 	20, // 30: proto.HeadGroupSpec.security_context:type_name -> proto.SecurityContext
-	32, // 31: proto.WorkerGroupSpec.ray_start_params:type_name -> proto.WorkerGroupSpec.RayStartParamsEntry
+	33, // 31: proto.WorkerGroupSpec.ray_start_params:type_name -> proto.WorkerGroupSpec.RayStartParamsEntry
 	18, // 32: proto.WorkerGroupSpec.volumes:type_name -> proto.Volume
 	14, // 33: proto.WorkerGroupSpec.environment:type_name -> proto.EnvironmentVariables
-	33, // 34: proto.WorkerGroupSpec.annotations:type_name -> proto.WorkerGroupSpec.AnnotationsEntry
-	34, // 35: proto.WorkerGroupSpec.labels:type_name -> proto.WorkerGroupSpec.LabelsEntry
+	34, // 34: proto.WorkerGroupSpec.annotations:type_name -> proto.WorkerGroupSpec.AnnotationsEntry
+	35, // 35: proto.WorkerGroupSpec.labels:type_name -> proto.WorkerGroupSpec.LabelsEntry
 	20, // 36: proto.WorkerGroupSpec.security_context:type_name -> proto.SecurityContext
-	35, // 37: proto.ClusterEvent.created_at:type_name -> google.protobuf.Timestamp
-	35, // 38: proto.ClusterEvent.first_timestamp:type_name -> google.protobuf.Timestamp
-	35, // 39: proto.ClusterEvent.last_timestamp:type_name -> google.protobuf.Timestamp
-	13, // 40: proto.EnvironmentVariables.ValuesFromEntry.value:type_name -> proto.EnvValueFrom
-	6,  // 41: proto.ClusterService.CreateCluster:input_type -> proto.CreateClusterRequest
-	7,  // 42: proto.ClusterService.GetCluster:input_type -> proto.GetClusterRequest
-	8,  // 43: proto.ClusterService.ListCluster:input_type -> proto.ListClustersRequest
-	10, // 44: proto.ClusterService.ListAllClusters:input_type -> proto.ListAllClustersRequest
-	12, // 45: proto.ClusterService.DeleteCluster:input_type -> proto.DeleteClusterRequest
-	16, // 46: proto.ClusterService.CreateCluster:output_type -> proto.Cluster
-	16, // 47: proto.ClusterService.GetCluster:output_type -> proto.Cluster
-	9,  // 48: proto.ClusterService.ListCluster:output_type -> proto.ListClustersResponse
-	11, // 49: proto.ClusterService.ListAllClusters:output_type -> proto.ListAllClustersResponse
-	36, // 50: proto.ClusterService.DeleteCluster:output_type -> google.protobuf.Empty
-	46, // [46:51] is the sub-list for method output_type
-	41, // [41:46] is the sub-list for method input_type
-	41, // [41:41] is the sub-list for extension type_name
-	41, // [41:41] is the sub-list for extension extendee
-	0,  // [0:41] is the sub-list for field type_name
+	23, // 37: proto.WorkerGroupSpec.init_containers:type_name -> proto.InitContainer
+	18, // 38: proto.InitContainer.volumes:type_name -> proto.Volume
+	14, // 39: proto.InitContainer.environment:type_name -> proto.EnvironmentVariables
+	36, // 40: proto.ClusterEvent.created_at:type_name -> google.protobuf.Timestamp
+	36, // 41: proto.ClusterEvent.first_timestamp:type_name -> google.protobuf.Timestamp
+	36, // 42: proto.ClusterEvent.last_timestamp:type_name -> google.protobuf.Timestamp
+	13, // 43: proto.EnvironmentVariables.ValuesFromEntry.value:type_name -> proto.EnvValueFrom
+	6,  // 44: proto.ClusterService.CreateCluster:input_type -> proto.CreateClusterRequest
+	7,  // 45: proto.ClusterService.GetCluster:input_type -> proto.GetClusterRequest
+	8,  // 46: proto.ClusterService.ListCluster:input_type -> proto.ListClustersRequest
+	10, // 47: proto.ClusterService.ListAllClusters:input_type -> proto.ListAllClustersRequest
+	12, // 48: proto.ClusterService.DeleteCluster:input_type -> proto.DeleteClusterRequest
+	16, // 49: proto.ClusterService.CreateCluster:output_type -> proto.Cluster
+	16, // 50: proto.ClusterService.GetCluster:output_type -> proto.Cluster
+	9,  // 51: proto.ClusterService.ListCluster:output_type -> proto.ListClustersResponse
+	11, // 52: proto.ClusterService.ListAllClusters:output_type -> proto.ListAllClustersResponse
+	37, // 53: proto.ClusterService.DeleteCluster:output_type -> google.protobuf.Empty
+	49, // [49:54] is the sub-list for method output_type
+	44, // [44:49] is the sub-list for method input_type
+	44, // [44:44] is the sub-list for extension type_name
+	44, // [44:44] is the sub-list for extension extendee
+	0,  // [0:44] is the sub-list for field type_name
 }
 
 func init() { file_cluster_proto_init() }
@@ -2590,6 +2705,18 @@ func file_cluster_proto_init() {
 			}
 		}
 		file_cluster_proto_msgTypes[17].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*InitContainer); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_cluster_proto_msgTypes[18].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*ClusterEvent); i {
 			case 0:
 				return &v.state
@@ -2609,7 +2736,7 @@ func file_cluster_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_cluster_proto_rawDesc,
 			NumEnums:      6,
-			NumMessages:   29,
+			NumMessages:   30,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
diff --git a/proto/go_client/cluster.pb.gw.go b/proto/go_client/cluster.pb.gw.go
index 4e33eb4c2c..162911c909 100644
--- a/proto/go_client/cluster.pb.gw.go
+++ b/proto/go_client/cluster.pb.gw.go
@@ -440,7 +440,7 @@ func RegisterClusterServiceHandlerServer(ctx context.Context, mux *runtime.Serve
 // RegisterClusterServiceHandlerFromEndpoint is same as RegisterClusterServiceHandler but
 // automatically dials to "endpoint" and closes the connection when "ctx" gets done.
 func RegisterClusterServiceHandlerFromEndpoint(ctx context.Context, mux *runtime.ServeMux, endpoint string, opts []grpc.DialOption) (err error) {
-	conn, err := grpc.NewClient(endpoint, opts...)
+	conn, err := grpc.Dial(endpoint, opts...)
 	if err != nil {
 		return err
 	}
diff --git a/proto/go_client/config.pb.gw.go b/proto/go_client/config.pb.gw.go
index c57ef2828d..27ce40ff93 100644
--- a/proto/go_client/config.pb.gw.go
+++ b/proto/go_client/config.pb.gw.go
@@ -789,7 +789,7 @@ func RegisterImageTemplateServiceHandlerServer(ctx context.Context, mux *runtime
 // RegisterComputeTemplateServiceHandlerFromEndpoint is same as RegisterComputeTemplateServiceHandler but
 // automatically dials to "endpoint" and closes the connection when "ctx" gets done.
 func RegisterComputeTemplateServiceHandlerFromEndpoint(ctx context.Context, mux *runtime.ServeMux, endpoint string, opts []grpc.DialOption) (err error) {
-	conn, err := grpc.NewClient(endpoint, opts...)
+	conn, err := grpc.Dial(endpoint, opts...)
 	if err != nil {
 		return err
 	}
@@ -954,7 +954,7 @@ var (
 // RegisterImageTemplateServiceHandlerFromEndpoint is same as RegisterImageTemplateServiceHandler but
 // automatically dials to "endpoint" and closes the connection when "ctx" gets done.
 func RegisterImageTemplateServiceHandlerFromEndpoint(ctx context.Context, mux *runtime.ServeMux, endpoint string, opts []grpc.DialOption) (err error) {
-	conn, err := grpc.NewClient(endpoint, opts...)
+	conn, err := grpc.Dial(endpoint, opts...)
 	if err != nil {
 		return err
 	}
diff --git a/proto/go_client/job.pb.gw.go b/proto/go_client/job.pb.gw.go
index 5cd31a6d38..7a90b31de8 100644
--- a/proto/go_client/job.pb.gw.go
+++ b/proto/go_client/job.pb.gw.go
@@ -440,7 +440,7 @@ func RegisterRayJobServiceHandlerServer(ctx context.Context, mux *runtime.ServeM
 // RegisterRayJobServiceHandlerFromEndpoint is same as RegisterRayJobServiceHandler but
 // automatically dials to "endpoint" and closes the connection when "ctx" gets done.
 func RegisterRayJobServiceHandlerFromEndpoint(ctx context.Context, mux *runtime.ServeMux, endpoint string, opts []grpc.DialOption) (err error) {
-	conn, err := grpc.NewClient(endpoint, opts...)
+	conn, err := grpc.Dial(endpoint, opts...)
 	if err != nil {
 		return err
 	}
diff --git a/proto/go_client/job_submission.pb.gw.go b/proto/go_client/job_submission.pb.gw.go
index 4235d66139..eafd5e65d1 100644
--- a/proto/go_client/job_submission.pb.gw.go
+++ b/proto/go_client/job_submission.pb.gw.go
@@ -709,7 +709,7 @@ func RegisterRayJobSubmissionServiceHandlerServer(ctx context.Context, mux *runt
 // RegisterRayJobSubmissionServiceHandlerFromEndpoint is same as RegisterRayJobSubmissionServiceHandler but
 // automatically dials to "endpoint" and closes the connection when "ctx" gets done.
 func RegisterRayJobSubmissionServiceHandlerFromEndpoint(ctx context.Context, mux *runtime.ServeMux, endpoint string, opts []grpc.DialOption) (err error) {
-	conn, err := grpc.NewClient(endpoint, opts...)
+	conn, err := grpc.Dial(endpoint, opts...)
 	if err != nil {
 		return err
 	}
diff --git a/proto/go_client/serve.pb.gw.go b/proto/go_client/serve.pb.gw.go
index 90d9c72286..e6a734eab2 100644
--- a/proto/go_client/serve.pb.gw.go
+++ b/proto/go_client/serve.pb.gw.go
@@ -587,7 +587,7 @@ func RegisterRayServeServiceHandlerServer(ctx context.Context, mux *runtime.Serv
 // RegisterRayServeServiceHandlerFromEndpoint is same as RegisterRayServeServiceHandler but
 // automatically dials to "endpoint" and closes the connection when "ctx" gets done.
 func RegisterRayServeServiceHandlerFromEndpoint(ctx context.Context, mux *runtime.ServeMux, endpoint string, opts []grpc.DialOption) (err error) {
-	conn, err := grpc.NewClient(endpoint, opts...)
+	conn, err := grpc.Dial(endpoint, opts...)
 	if err != nil {
 		return err
 	}
diff --git a/proto/kuberay_api.swagger.json b/proto/kuberay_api.swagger.json
index 0bcf0027ef..9e6326423b 100644
--- a/proto/kuberay_api.swagger.json
+++ b/proto/kuberay_api.swagger.json
@@ -1343,6 +1343,44 @@
         "rayStartParams"
       ]
     },
+    "protoInitContainer": {
+      "type": "object",
+      "properties": {
+        "name": {
+          "type": "string",
+          "title": "Required. Group name of the current worker group",
+          "required": [
+            "name"
+          ]
+        },
+        "image": {
+          "type": "string",
+          "title": "Required. This field will be used to retrieve right init container",
+          "required": [
+            "image"
+          ]
+        },
+        "volumes": {
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/protoVolume"
+          },
+          "title": "Optional. The volumes mount to init container"
+        },
+        "environment": {
+          "$ref": "#/definitions/protoEnvironmentVariables",
+          "title": "Optional. Environment variables for init container"
+        },
+        "imagePullPolicy": {
+          "type": "string",
+          "title": "Optional image pull policy We only support Always and ifNotPresent"
+        }
+      },
+      "required": [
+        "name",
+        "image"
+      ]
+    },
     "protoListAllClustersResponse": {
       "type": "object",
       "properties": {
@@ -1517,6 +1555,13 @@
         "securityContext": {
           "$ref": "#/definitions/protoSecurityContext",
           "description": "Optional. Configure the security context for the worker container for debugging etc."
+        },
+        "initContainers": {
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/protoInitContainer"
+          },
+          "title": "Optional. init container specs"
         }
       },
       "required": [
diff --git a/proto/swagger/cluster.swagger.json b/proto/swagger/cluster.swagger.json
index ae82c51caa..c55abdbf26 100644
--- a/proto/swagger/cluster.swagger.json
+++ b/proto/swagger/cluster.swagger.json
@@ -601,6 +601,44 @@
         "rayStartParams"
       ]
     },
+    "protoInitContainer": {
+      "type": "object",
+      "properties": {
+        "name": {
+          "type": "string",
+          "title": "Required. Group name of the current worker group",
+          "required": [
+            "name"
+          ]
+        },
+        "image": {
+          "type": "string",
+          "title": "Required. This field will be used to retrieve right init container",
+          "required": [
+            "image"
+          ]
+        },
+        "volumes": {
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/protoVolume"
+          },
+          "title": "Optional. The volumes mount to init container"
+        },
+        "environment": {
+          "$ref": "#/definitions/protoEnvironmentVariables",
+          "title": "Optional. Environment variables for init container"
+        },
+        "imagePullPolicy": {
+          "type": "string",
+          "title": "Optional image pull policy We only support Always and ifNotPresent"
+        }
+      },
+      "required": [
+        "name",
+        "image"
+      ]
+    },
     "protoListAllClustersResponse": {
       "type": "object",
       "properties": {
@@ -775,6 +813,13 @@
         "securityContext": {
           "$ref": "#/definitions/protoSecurityContext",
           "description": "Optional. Configure the security context for the worker container for debugging etc."
+        },
+        "initContainers": {
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/protoInitContainer"
+          },
+          "title": "Optional. init container specs"
         }
       },
       "required": [
diff --git a/proto/swagger/job.swagger.json b/proto/swagger/job.swagger.json
index 809305ea46..838aba0749 100644
--- a/proto/swagger/job.swagger.json
+++ b/proto/swagger/job.swagger.json
@@ -459,6 +459,44 @@
         "rayStartParams"
       ]
     },
+    "protoInitContainer": {
+      "type": "object",
+      "properties": {
+        "name": {
+          "type": "string",
+          "title": "Required. Group name of the current worker group",
+          "required": [
+            "name"
+          ]
+        },
+        "image": {
+          "type": "string",
+          "title": "Required. This field will be used to retrieve right init container",
+          "required": [
+            "image"
+          ]
+        },
+        "volumes": {
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/protoVolume"
+          },
+          "title": "Optional. The volumes mount to init container"
+        },
+        "environment": {
+          "$ref": "#/definitions/protoEnvironmentVariables",
+          "title": "Optional. Environment variables for init container"
+        },
+        "imagePullPolicy": {
+          "type": "string",
+          "title": "Optional image pull policy We only support Always and ifNotPresent"
+        }
+      },
+      "required": [
+        "name",
+        "image"
+      ]
+    },
     "protoListAllRayJobsResponse": {
       "type": "object",
       "properties": {
@@ -799,6 +837,13 @@
         "securityContext": {
           "$ref": "#/definitions/protoSecurityContext",
           "description": "Optional. Configure the security context for the worker container for debugging etc."
+        },
+        "initContainers": {
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/protoInitContainer"
+          },
+          "title": "Optional. init container specs"
         }
       },
       "required": [
diff --git a/proto/swagger/serve.swagger.json b/proto/swagger/serve.swagger.json
index 7249c85946..49da95cdf9 100644
--- a/proto/swagger/serve.swagger.json
+++ b/proto/swagger/serve.swagger.json
@@ -537,6 +537,44 @@
         "rayStartParams"
       ]
     },
+    "protoInitContainer": {
+      "type": "object",
+      "properties": {
+        "name": {
+          "type": "string",
+          "title": "Required. Group name of the current worker group",
+          "required": [
+            "name"
+          ]
+        },
+        "image": {
+          "type": "string",
+          "title": "Required. This field will be used to retrieve right init container",
+          "required": [
+            "image"
+          ]
+        },
+        "volumes": {
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/protoVolume"
+          },
+          "title": "Optional. The volumes mount to init container"
+        },
+        "environment": {
+          "$ref": "#/definitions/protoEnvironmentVariables",
+          "title": "Optional. Environment variables for init container"
+        },
+        "imagePullPolicy": {
+          "type": "string",
+          "title": "Optional image pull policy We only support Always and ifNotPresent"
+        }
+      },
+      "required": [
+        "name",
+        "image"
+      ]
+    },
     "protoListAllRayServicesResponse": {
       "type": "object",
       "properties": {
@@ -941,6 +979,13 @@
         "securityContext": {
           "$ref": "#/definitions/protoSecurityContext",
           "description": "Optional. Configure the security context for the worker container for debugging etc."
+        },
+        "initContainers": {
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/protoInitContainer"
+          },
+          "title": "Optional. init container specs"
         }
       },
       "required": [