add work driver to cluster manager.

Signed-off-by: morvencao <[email protected]>

Author: morvencao

operator/v1/0000_01_operator.open-cluster-management.io_clustermanagers.crd.yaml

@@ -323,6 +323,8 @@ spec:
                     type: string
                 type: object
               workConfiguration:
+                default:
+                  workDriver: kube
                 description: WorkConfiguration contains the configuration of work
                 properties:
                   featureGates:
@@ -356,6 +358,22 @@ spec:
                       - feature
                       type: object
                     type: array
+                  workDriver:
+                    default: kube
+                    description: "WorkDriver represents the type of work driver. Possible
+                      values are \"kube\", \"mqtt\", or \"grpc\". If not provided,
+                      the default value is \"kube\". If set to non-\"kube\" drivers,
+                      the klusterlet need to use the same driver. and the driver configuration
+                      must be provided in a secret named \"work-driver-config\" in
+                      the namespace where the cluster manager is running, adhering
+                      to the following structure: config.yaml: | <driver-config-in-yaml>
+                      \n For detailed driver configuration, please refer to the sdk-go
+                      documentation: https://github.com/open-cluster-management-io/sdk-go/blob/main/pkg/cloudevents/README.md#supported-protocols-and-drivers"
+                    enum:
+                    - kube
+                    - mqtt
+                    - grpc
+                    type: string
                 type: object
               workImagePullSpec:
                 default: quay.io/open-cluster-management/work

operator/v1/types_clustermanager.go

@@ -65,6 +65,7 @@ type ClusterManagerSpec struct {
 
 	// WorkConfiguration contains the configuration of work
 	// +optional
+	// +kubebuilder:default={workDriver: kube}
 	WorkConfiguration *WorkConfiguration `json:"workConfiguration,omitempty"`
 
 	// AddOnManagerConfiguration contains the configuration of addon manager
@@ -119,6 +120,21 @@ type WorkConfiguration struct {
 	//  	he can set featuregate/Foo=false before upgrading. Let's say the cluster-admin wants featuregate/Foo=false.
 	// +optional
 	FeatureGates []FeatureGate `json:"featureGates,omitempty"`
+
+	// WorkDriver represents the type of work driver. Possible values are "kube", "mqtt", or "grpc".
+	// If not provided, the default value is "kube".
+	// If set to non-"kube" drivers, the klusterlet need to use the same driver.
+	// and the driver configuration must be provided in a secret named "work-driver-config"
+	// in the namespace where the cluster manager is running, adhering to the following structure:
+	// config.yaml: |
+	//   <driver-config-in-yaml>
+	//
+	// For detailed driver configuration, please refer to the sdk-go documentation: https://github.com/open-cluster-management-io/sdk-go/blob/main/pkg/cloudevents/README.md#supported-protocols-and-drivers
+	//
+	// +optional
+	// +kubebuilder:default:=kube
+	// +kubebuilder:validation:Enum=kube;mqtt;grpc
+	WorkDriver string `json:"workDriver,omitempty"`
 }
 
 type AddOnManagerConfiguration struct {