Merge pull request karmada-io#146 from Heylosky/member-cluster-node

Add route to get member cluster node

Author: karmada-bot

cmd/api/app/api.go

@@ -25,6 +25,7 @@ import (
 	_ "github.com/karmada-io/dashboard/cmd/api/app/routes/deployment"
 	_ "github.com/karmada-io/dashboard/cmd/api/app/routes/ingress"
 	_ "github.com/karmada-io/dashboard/cmd/api/app/routes/job"
+	_ "github.com/karmada-io/dashboard/cmd/api/app/routes/member/node"
 	_ "github.com/karmada-io/dashboard/cmd/api/app/routes/namespace"
 	_ "github.com/karmada-io/dashboard/cmd/api/app/routes/overview"
 	_ "github.com/karmada-io/dashboard/cmd/api/app/routes/propagationpolicy"

cmd/api/app/routes/member/node/handler.go

@@ -0,0 +1,33 @@
+package node
+
+import (
+	"context"
+	"github.com/gin-gonic/gin"
+	"github.com/karmada-io/dashboard/cmd/api/app/router"
+	"github.com/karmada-io/dashboard/cmd/api/app/types/common"
+	"github.com/karmada-io/dashboard/pkg/client"
+	"github.com/karmada-io/dashboard/pkg/resource/node"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+func handleGetClusterNode(c *gin.Context) {
+	karmadaClient := client.InClusterKarmadaClient()
+	_, err := karmadaClient.ClusterV1alpha1().Clusters().Get(context.TODO(), c.Param("clustername"), metav1.GetOptions{})
+	if err != nil {
+		common.Fail(c, err)
+		return
+	}
+	memberClient := client.InClusterClientForMemberCluster(c.Param("clustername"))
+	dataSelect := common.ParseDataSelectPathParameter(c)
+	result, err := node.GetNodeList(memberClient, dataSelect)
+	if err != nil {
+		common.Fail(c, err)
+		return
+	}
+	common.Success(c, result)
+}
+
+func init() {
+	r := router.V1()
+	r.GET("/member/:clustername/node", handleGetClusterNode)
+}

pkg/client/init.go

@@ -3,22 +3,29 @@ package client
 import (
 	"errors"
 	"fmt"
+	"os"
+	"sync"
+
 	karmadaclientset "github.com/karmada-io/karmada/pkg/generated/clientset/versioned"
 	kubeclient "k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/rest"
 	clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
 	"k8s.io/klog/v2"
-	"os"
 )
 
+const proxyURL = "/apis/cluster.karmada.io/v1alpha1/clusters/%s/proxy/"
+
 var (
 	kubernetesRestConfig               *rest.Config
 	kubernetesApiConfig                *clientcmdapi.Config
 	inClusterClient                    kubeclient.Interface
 	karmadaRestConfig                  *rest.Config
 	karmadaApiConfig                   *clientcmdapi.Config
+	karmadaMemberConfig                *rest.Config
 	inClusterKarmadaClient             karmadaclientset.Interface
 	inClusterClientForKarmadaApiServer kubeclient.Interface
+	inClusterClientForMemberApiServer  kubeclient.Interface
+	memberClients                      sync.Map
 )
 
 type configBuilder struct {
@@ -185,6 +192,13 @@ func InitKarmadaConfig(options ...Option) {
 		os.Exit(1)
 	}
 	karmadaApiConfig = apiConfig
+
+	memberConfig, err := builder.buildRestConfig()
+	if err != nil {
+		klog.Errorf("Could not init member config: %s", err)
+		os.Exit(1)
+	}
+	karmadaMemberConfig = memberConfig
 }
 
 func InClusterKarmadaClient() karmadaclientset.Interface {
@@ -212,6 +226,13 @@ func GetKarmadaConfig() (*rest.Config, *clientcmdapi.Config, error) {
 	return karmadaRestConfig, karmadaApiConfig, nil
 }
 
+func GetMemberConfig() (*rest.Config, error) {
+	if !isKarmadaInitialized() {
+		return nil, fmt.Errorf("client package not initialized")
+	}
+	return karmadaMemberConfig, nil
+}
+
 func InClusterClientForKarmadaApiServer() kubeclient.Interface {
 	if !isKarmadaInitialized() {
 		return nil
@@ -233,6 +254,43 @@ func InClusterClientForKarmadaApiServer() kubeclient.Interface {
 	return inClusterClientForKarmadaApiServer
 }
 
+func InClusterClientForMemberCluster(clusterName string) kubeclient.Interface {
+	if !isKarmadaInitialized() {
+		return nil
+	}
+
+	// Load and return Interface for member apiserver if already exist
+	if value, ok := memberClients.Load(clusterName); ok {
+		if inClusterClientForMemberApiServer, ok = value.(kubeclient.Interface); ok {
+			return inClusterClientForMemberApiServer
+		} else {
+			klog.Error("Could not get client for member apiserver")
+			return nil
+		}
+	}
+
+	// Client for new member apiserver
+	restConfig, _, err := GetKarmadaConfig()
+	if err != nil {
+		klog.ErrorS(err, "Could not get karmada restConfig")
+		return nil
+	}
+	memberConfig, err := GetMemberConfig()
+	if err != nil {
+		klog.ErrorS(err, "Could not get member restConfig")
+		return nil
+	}
+	memberConfig.Host = restConfig.Host + fmt.Sprintf(proxyURL, clusterName)
+	c, err := kubeclient.NewForConfig(memberConfig)
+	if err != nil {
+		klog.ErrorS(err, "Could not init kubernetes in-cluster client for member apiserver")
+		return nil
+	}
+	inClusterClientForMemberApiServer = c
+	memberClients.Store(clusterName, inClusterClientForMemberApiServer)
+	return inClusterClientForMemberApiServer
+}
+
 func ConvertRestConfigToAPIConfig(restConfig *rest.Config) *clientcmdapi.Config {
 	// 将 rest.Config 转换为 clientcmdapi.Config
 	clientcmdConfig := clientcmdapi.NewConfig()

pkg/resource/common/resourcechannels.go

@@ -441,6 +441,26 @@ type NodeListChannel struct {
 	Error chan error
 }
 
+// GetNodeListChannel returns a pair of channels to a Node list and errors that both must be read
+// numReads times.
+func GetNodeListChannel(client client.Interface, numReads int) NodeListChannel {
+
+	channel := NodeListChannel{
+		List:  make(chan *v1.NodeList, numReads),
+		Error: make(chan error, numReads),
+	}
+
+	go func() {
+		list, err := client.CoreV1().Nodes().List(context.TODO(), helpers.ListEverything)
+		for i := 0; i < numReads; i++ {
+			channel.List <- list
+			channel.Error <- err
+		}
+	}()
+
+	return channel
+}
+
 // NamespaceListChannel is a list and error channels to Namespaces.
 type NamespaceListChannel struct {
 	List  chan *v1.NamespaceList

pkg/resource/node/common.go

@@ -0,0 +1,38 @@
+package node
+
+import (
+	"github.com/karmada-io/dashboard/pkg/dataselect"
+	api "k8s.io/api/core/v1"
+)
+
+type NodeCell api.Node
+
+func (self NodeCell) GetProperty(name dataselect.PropertyName) dataselect.ComparableValue {
+	switch name {
+	case dataselect.NameProperty:
+		return dataselect.StdComparableString(self.ObjectMeta.Name)
+	case dataselect.CreationTimestampProperty:
+		return dataselect.StdComparableTime(self.ObjectMeta.CreationTimestamp.Time)
+	case dataselect.NamespaceProperty:
+		return dataselect.StdComparableString(self.ObjectMeta.Namespace)
+	default:
+		// if name is not supported then just return a constant dummy value, sort will have no effect.
+		return nil
+	}
+}
+
+func toCells(std []api.Node) []dataselect.DataCell {
+	cells := make([]dataselect.DataCell, len(std))
+	for i := range std {
+		cells[i] = NodeCell(std[i])
+	}
+	return cells
+}
+
+func fromCells(cells []dataselect.DataCell) []api.Node {
+	std := make([]api.Node, len(cells))
+	for i := range std {
+		std[i] = api.Node(cells[i].(NodeCell))
+	}
+	return std
+}

pkg/resource/node/list.go

@@ -0,0 +1,93 @@
+package node
+
+import (
+	"log"
+
+	"github.com/karmada-io/dashboard/pkg/common/errors"
+	"github.com/karmada-io/dashboard/pkg/common/types"
+	"github.com/karmada-io/dashboard/pkg/dataselect"
+	"github.com/karmada-io/dashboard/pkg/resource/common"
+	"github.com/karmada-io/karmada/pkg/apis/cluster/v1alpha1"
+	v1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/client-go/kubernetes"
+)
+
+type Node struct {
+	ObjectMeta  types.ObjectMeta      `json:"objectMeta"`
+	TypeMeta    types.TypeMeta        `json:"typeMeta"`
+	NodeSummary *v1alpha1.NodeSummary `json:"nodeSummary,omitempty"`
+	Status      v1.NodeStatus         `json:"status"`
+}
+
+// NodeList contains a list of node.
+type NodeList struct {
+	ListMeta types.ListMeta `json:"listMeta"`
+
+	// Unordered list of Nodes
+	Items []Node `json:"items"`
+
+	// List of non-critical errors, that occurred during resource retrieval.
+	Errors []error `json:"errors"`
+}
+
+// GetNodeList returns a list of all Nodes in all cluster.
+func GetNodeList(client kubernetes.Interface, dsQuery *dataselect.DataSelectQuery) (*NodeList, error) {
+	log.Printf("Getting nodes")
+	channels := &common.ResourceChannels{
+		NodeList: common.GetNodeListChannel(client, 1),
+	}
+
+	return GetNodeListFromChannels(channels, dsQuery)
+}
+
+// GetNodeListFromChannels returns a list of all Nodes in the cluster reading required resource list once from the channels.
+func GetNodeListFromChannels(channels *common.ResourceChannels, dsQuery *dataselect.DataSelectQuery) (*NodeList, error) {
+	nodes := <-channels.NodeList.List
+	err := <-channels.NodeList.Error
+	nonCriticalErrors, criticalError := errors.ExtractErrors(err)
+	if criticalError != nil {
+		return nil, criticalError
+	}
+
+	result := toNodeList(nodes.Items, nonCriticalErrors, dsQuery)
+
+	return result, nil
+}
+
+func toNode(meta metav1.ObjectMeta, status v1.NodeStatus) Node {
+	return Node{
+		ObjectMeta: types.NewObjectMeta(meta),
+		TypeMeta:   types.NewTypeMeta(types.ResourceKindNode),
+		Status:     NewStatus(status),
+	}
+}
+
+func toNodeList(nodes []v1.Node, nonCriticalErrors []error, dsQuery *dataselect.DataSelectQuery) *NodeList {
+	result := &NodeList{
+		Items:    make([]Node, 0),
+		ListMeta: types.ListMeta{TotalItems: len(nodes)},
+		Errors:   nonCriticalErrors,
+	}
+
+	nodeCells, filteredTotal := dataselect.GenericDataSelectWithFilter(toCells(nodes), dsQuery)
+	nodes = fromCells(nodeCells)
+	result.ListMeta = types.ListMeta{TotalItems: filteredTotal}
+
+	for _, item := range nodes {
+		result.Items = append(result.Items, toNode(item.ObjectMeta, item.Status))
+	}
+
+	return result
+}
+
+func NewStatus(status v1.NodeStatus) v1.NodeStatus {
+	return v1.NodeStatus{
+		Capacity:        status.Capacity,
+		Allocatable:     status.Allocatable,
+		Conditions:      status.Conditions,
+		Addresses:       status.Addresses,
+		DaemonEndpoints: status.DaemonEndpoints,
+		NodeInfo:        status.NodeInfo,
+	}
+}