[Addon kubevela#603] Add Apache Spark as a experimental addon

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

experimental/addons/spark-kubernetes-operator/README.md

@@ -12,3 +12,23 @@ A kubernetes operator for Apache Spark(https://github.com/GoogleCloudPlatform/sp
 vela addon enable fluxcd
 vela addon enable spark-kubernetes-operator
 ```
+
+# Uninstall
+
+```
+vela addon disable spark-kubernetes-operator
+vela addon disable fluxcd
+```
+
+# To check the spark-kubernetes-operator running status
+
+* Firstly, check the spark-kubernetes-operator (and the fluxcd and we need to deploy by helm) running status
+
+```
+vela addon status spark-kubernetes-operator
+vela ls -A | grep spark
+```
+
+* Secondly, show the component type `spark-cluster`, so we know how to use it in one application
+
+

experimental/addons/spark-kubernetes-operator/definitions/spark-cluster.cue

@@ -0,0 +1,67 @@
+"spark-cluster": {
+	annotations: {}
+	attributes: workload: type: "autodetects.core.oam.dev"
+	description: "Spark Component."
+	labels: {}
+	type: "component"
+}
+
+template: {
+	parameter: {
+		name: string
+ 		namespace: string
+		type: string
+		mode: string
+		image: string
+		imagePullPolicy: string
+		mainClass: string
+		mainApplicationFile: string
+		sparkVersion: string
+		driverCores: int
+		executorCores: int
+	}
+
+        output: {
+                kind:       "ClusterRoleBinding"
+                apiVersion: "rbac.authorization.k8s.io/v1"
+                metadata: name: parameter.name
+                roleRef: {
+                        name:     "edit"
+                        apiGroup: "rbac.authorization.k8s.io"
+                        kind:     "ClusterRole"
+                }
+                subjects: [{
+                        name:      "default"
+                        kind:      "ServiceAccount"
+                        namespace: parameter.namespace
+                }]
+        }
+
+	outputs: {
+
+		"spark": {
+		    kind: "SparkApplication"
+                    apiVersion: "sparkoperator.k8s.io/v1beta2"
+		    metadata: {
+			name: 	   parameter.name
+			namespace: parameter.namespace
+		    }
+		    spec: {
+			type: parameter.type
+			mode: parameter.mode
+			image: parameter.image
+			imagePullPolicy: parameter.imagePullPolicy
+			mainClass: parameter.mainClass
+			mainApplicationFile: parameter.mainApplicationFile
+			sparkVersion: parameter.sparkVersion
+			driver: {
+			    cores: parameter.driverCores
+			}
+			executor: {
+			    cores: parameter.executorCores	
+			}
+		    }
+		}
+
+	}
+}