[Feat][Kubectl-Plugin] Implement kubectl session for RayJob and RaySe…

…rvice (#2379)

kubectl-plugin/go.mod

@@ -10,6 +10,7 @@ require (
 	github.com/spf13/cobra v1.8.1
 	github.com/spf13/pflag v1.0.5
 	github.com/stretchr/testify v1.8.4
+	k8s.io/api v0.30.2
 	k8s.io/apimachinery v0.30.2
 	k8s.io/cli-runtime v0.30.2
 	k8s.io/client-go v0.30.2
@@ -76,7 +77,6 @@ require (
 	gopkg.in/inf.v0 v0.9.1 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
-	k8s.io/api v0.30.2 // indirect
 	k8s.io/component-base v0.30.2 // indirect
 	k8s.io/klog/v2 v2.120.1 // indirect
 	k8s.io/kube-openapi v0.0.0-20240228011516-70dd3763d340 // indirect

kubectl-plugin/pkg/cmd/session/session.go

@@ -3,51 +3,93 @@ package session
 import (
 	"context"
 	"fmt"
+	"strings"
 
-	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"github.com/ray-project/kuberay/kubectl-plugin/pkg/util"
+	"github.com/ray-project/kuberay/kubectl-plugin/pkg/util/client"
+	"github.com/spf13/cobra"
 	"k8s.io/cli-runtime/pkg/genericclioptions"
 	"k8s.io/cli-runtime/pkg/genericiooptions"
-	"k8s.io/client-go/kubernetes"
 	"k8s.io/kubectl/pkg/cmd/portforward"
 	cmdutil "k8s.io/kubectl/pkg/cmd/util"
-
-	"github.com/spf13/cobra"
+	"k8s.io/kubectl/pkg/util/templates"
 )
 
-const (
-	DASHBOARD_PORT = 8265
-	CLIENT_PORT    = 10001
-)
+type appPort struct {
+	name string
+	port int
+}
 
 type SessionOptions struct {
-	ioStreams    *genericiooptions.IOStreams
 	configFlags  *genericclioptions.ConfigFlags
+	ioStreams    *genericiooptions.IOStreams
+	client       client.Client
+	ResourceType util.ResourceType
 	ResourceName string
 	Namespace    string
 }
 
+var (
+	dashboardPort = appPort{
+		name: "Ray Dashboard",
+		port: 8265,
+	}
+	clientPort = appPort{
+		name: "Ray Interactive Client",
+		port: 10001,
+	}
+	servePort = appPort{
+		name: "Ray Serve",
+		port: 8000,
+	}
+)
+
+var (
+	sessionLong = templates.LongDesc(`
+		Forward local ports to the Ray resources.
+
+		Forward different local ports depending on the resource type: RayCluster, RayJob, or RayService.
+	`)
+
+	sessionExample = templates.Examples(`
+		# Without specifying the resource type, forward local ports to the RayCluster resource
+		kubectl ray session my-raycluster
+
+		# Forward local ports to the RayCluster resource
+		kubectl ray session raycluster/my-raycluster
+
+		# Forward local ports to the RayCluster used for the RayJob resource
+		kubectl ray session rayjob/my-rayjob
+
+		# Forward local ports to the RayCluster used for the RayService resource
+		kubectl ray session rayservice/my-rayservice
+	`)
+)
+
 func NewSessionOptions(streams genericiooptions.IOStreams) *SessionOptions {
+	configFlags := genericclioptions.NewConfigFlags(true)
 	return &SessionOptions{
 		ioStreams:   &streams,
-		configFlags: genericclioptions.NewConfigFlags(true),
+		configFlags: configFlags,
 	}
 }
 
 func NewSessionCommand(streams genericiooptions.IOStreams) *cobra.Command {
 	options := NewSessionOptions(streams)
-	factory := cmdutil.NewFactory(options.configFlags)
 
 	cmd := &cobra.Command{
-		Use:   "session NAME",
-		Short: "Forward local ports to the Ray resources. Currently only supports RayCluster.",
+		Use:     "session (RAYCLUSTER | TYPE/NAME)",
+		Short:   "Forward local ports to the Ray resources.",
+		Long:    sessionLong,
+		Example: sessionExample,
 		RunE: func(cmd *cobra.Command, args []string) error {
 			if err := options.Complete(cmd, args); err != nil {
 				return err
 			}
 			if err := options.Validate(); err != nil {
 				return err
 			}
-			return options.Run(cmd.Context(), factory)
+			return options.Run(cmd.Context())
 		},
 	}
 	options.configFlags.AddFlags(cmd.Flags())
@@ -58,14 +100,43 @@ func (options *SessionOptions) Complete(cmd *cobra.Command, args []string) error
 	if len(args) != 1 {
 		return cmdutil.UsageErrorf(cmd, "%s", cmd.Use)
 	}
-	options.ResourceName = args[0]
+
+	typeAndName := strings.Split(args[0], "/")
+	if len(typeAndName) == 1 {
+		options.ResourceType = util.RayCluster
+		options.ResourceName = typeAndName[0]
+	} else {
+		if len(typeAndName) != 2 || typeAndName[1] == "" {
+			return cmdutil.UsageErrorf(cmd, "invalid resource type/name: %s", args[0])
+		}
+
+		switch typeAndName[0] {
+		case string(util.RayCluster):
+			options.ResourceType = util.RayCluster
+		case string(util.RayJob):
+			options.ResourceType = util.RayJob
+		case string(util.RayService):
+			options.ResourceType = util.RayService
+		default:
+			return cmdutil.UsageErrorf(cmd, "unsupported resource type: %s", typeAndName[0])
+		}
+
+		options.ResourceName = typeAndName[1]
+	}
 
 	if *options.configFlags.Namespace == "" {
 		options.Namespace = "default"
 	} else {
 		options.Namespace = *options.configFlags.Namespace
 	}
 
+	factory := cmdutil.NewFactory(options.configFlags)
+	k8sClient, err := client.NewClient(factory)
+	if err != nil {
+		return fmt.Errorf("failed to create client: %w", err)
+	}
+	options.client = k8sClient
+
 	return nil
 }
 
@@ -81,46 +152,42 @@ func (options *SessionOptions) Validate() error {
 	return nil
 }
 
-func (options *SessionOptions) Run(ctx context.Context, factory cmdutil.Factory) error {
-	kubeClientSet, err := factory.KubernetesClientSet()
-	if err != nil {
-		return fmt.Errorf("failed to initialize clientset: %w", err)
-	}
+func (options *SessionOptions) Run(ctx context.Context) error {
+	factory := cmdutil.NewFactory(options.configFlags)
 
-	svcName, err := findServiceName(ctx, kubeClientSet, options.Namespace, options.ResourceName)
+	svcName, err := options.client.GetRayHeadSvcName(ctx, options.Namespace, options.ResourceType, options.ResourceName)
 	if err != nil {
 		return err
 	}
+	fmt.Printf("Forwarding ports to service %s\n", svcName)
+
+	var appPorts []appPort
+	switch options.ResourceType {
+	case util.RayCluster:
+		appPorts = []appPort{dashboardPort, clientPort}
+	case util.RayJob:
+		appPorts = []appPort{dashboardPort}
+	case util.RayService:
+		appPorts = []appPort{dashboardPort, servePort}
+	default:
+		return fmt.Errorf("unsupported resource type: %s", options.ResourceType)
+	}
 
 	portForwardCmd := portforward.NewCmdPortForward(factory, *options.ioStreams)
-	portForwardCmd.SetArgs([]string{svcName, fmt.Sprintf("%d:%d", DASHBOARD_PORT, DASHBOARD_PORT), fmt.Sprintf("%d:%d", CLIENT_PORT, CLIENT_PORT)})
+	args := []string{"service/" + svcName}
+	for _, appPort := range appPorts {
+		args = append(args, fmt.Sprintf("%d:%d", appPort.port, appPort.port))
+	}
+	portForwardCmd.SetArgs(args)
 
-	fmt.Printf("Ray Dashboard: http://localhost:%d\nRay Interactive Client: http://localhost:%d\n\n", DASHBOARD_PORT, CLIENT_PORT)
+	for _, appPort := range appPorts {
+		fmt.Printf("%s: http://localhost:%d\n", appPort.name, appPort.port)
+	}
+	fmt.Println()
 
 	if err := portForwardCmd.ExecuteContext(ctx); err != nil {
 		return fmt.Errorf("failed to port-forward: %w", err)
 	}
 
 	return nil
 }
-
-func findServiceName(ctx context.Context, kubeClientSet kubernetes.Interface, namespace, resourceName string) (string, error) {
-	listopts := metav1.ListOptions{
-		LabelSelector: fmt.Sprintf("ray.io/cluster=%s, ray.io/node-type=head", resourceName),
-	}
-
-	rayHeadSvcs, err := kubeClientSet.CoreV1().Services(namespace).List(ctx, listopts)
-	if err != nil {
-		return "", fmt.Errorf("unable to retrieve ray head services: %w", err)
-	}
-
-	if len(rayHeadSvcs.Items) == 0 {
-		return "", fmt.Errorf("no ray head services found")
-	}
-	if len(rayHeadSvcs.Items) > 1 {
-		return "", fmt.Errorf("more than one ray head service found")
-	}
-
-	rayHeadSrc := rayHeadSvcs.Items[0]
-	return "service/" + rayHeadSrc.Name, nil
-}