get member cluster node

Signed-off-by: Heylosky <2547226479@qq.com>

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

@@ -0,0 +1,25 @@
+package node
+
+import (
+	"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"
+)
+
+func handleGetClusterNode(c *gin.Context) {
+	karmadaClient := client.InClusterClientForKarmadactlApiServer(c.Param("clustername"))
+	dataSelect := common.ParseDataSelectPathParameter(c)
+	result, err := node.GetNodeList(karmadaClient, dataSelect)
+	if err != nil {
+		common.Fail(c, err)
+		return
+	}
+	common.Success(c, result)
+}
+
+func init() {
+	r := router.V1()
+	r.GET("/node/:clustername", handleGetClusterNode)
+}

pkg/client/init.go

@@ -3,22 +3,26 @@ package client
 import (
 	"errors"
 	"fmt"
+	"os"
+	"strings"
+
 	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"
 )
 
 var (
-	kubernetesRestConfig               *rest.Config
-	kubernetesApiConfig                *clientcmdapi.Config
-	inClusterClient                    kubeclient.Interface
-	karmadaRestConfig                  *rest.Config
-	karmadaApiConfig                   *clientcmdapi.Config
-	inClusterKarmadaClient             karmadaclientset.Interface
-	inClusterClientForKarmadaApiServer kubeclient.Interface
+	kubernetesRestConfig                  *rest.Config
+	kubernetesApiConfig                   *clientcmdapi.Config
+	inClusterClient                       kubeclient.Interface
+	karmadaRestConfig                     *rest.Config
+	karmadaApiConfig                      *clientcmdapi.Config
+	inClusterKarmadaClient                karmadaclientset.Interface
+	inClusterClientForKarmadaApiServer    kubeclient.Interface
+	inClusterClientForKarmadactlApiServer kubeclient.Interface
+	clusterHost                           string
 )
 
 type configBuilder struct {
@@ -185,6 +189,8 @@ func InitKarmadaConfig(options ...Option) {
 		os.Exit(1)
 	}
 	karmadaApiConfig = apiConfig
+
+	clusterHost = karmadaRestConfig.Host
 }
 
 func InClusterKarmadaClient() karmadaclientset.Interface {
@@ -233,6 +239,29 @@ func InClusterClientForKarmadaApiServer() kubeclient.Interface {
 	return inClusterClientForKarmadaApiServer
 }
 
+func InClusterClientForKarmadactlApiServer(clustername string) kubeclient.Interface {
+	if !isKarmadaInitialized() {
+		return nil
+	}
+	karmadaCtlRestConfig, _, err := GetKarmadaConfig()
+	if strings.Contains(karmadaCtlRestConfig.Host, clustername) {
+		return inClusterClientForKarmadactlApiServer
+	} else {
+		karmadaCtlRestConfig.Host = clusterHost + "/apis/cluster.karmada.io/v1alpha1/clusters/" + clustername + "/proxy"
+	}
+	if err != nil {
+		klog.ErrorS(err, "Could not get karmadactl restConfig")
+		return nil
+	}
+	c, err := kubeclient.NewForConfig(karmadaCtlRestConfig)
+	if err != nil {
+		klog.ErrorS(err, "Could not init kubernetes in-cluster client for karmadactl apiserver")
+		return nil
+	}
+	inClusterClientForKarmadactlApiServer = c
+	return inClusterClientForKarmadactlApiServer
+}
+
 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/detail.go

@@ -0,0 +1,20 @@
+package node
+
+type NodeAllocatedResources struct {
+	// CPUCapacity is specified node CPU capacity in milicores.
+	CPUCapacity int64   `json:"cpuCapacity"`
+	CPUFraction float64 `json:"cpuFraction"`
+
+	// MemoryCapacity is specified node memory capacity in bytes.
+	MemoryCapacity int64   `json:"memoryCapacity"`
+	MemoryFraction float64 `json:"memoryFraction"`
+
+	// AllocatedPods in number of currently allocated pods on the node.
+	AllocatedPods int64 `json:"allocatedPods"`
+
+	// PodCapacity is maximum number of pods, that can be allocated on the node.
+	PodCapacity int64 `json:"podCapacity"`
+
+	// PodFraction is a fraction of pods, that can be allocated on given node.
+	PodFraction float64 `json:"podFraction"`
+}

pkg/resource/node/list.go

@@ -0,0 +1,83 @@
+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"`
+	Ready              metav1.ConditionStatus `json:"ready,omitempty"`
+	KubernetesVersion  string                 `json:"kubernetesVersion,omitempty"`
+	NodeSummary        *v1alpha1.NodeSummary  `json:"nodeSummary,omitempty"`
+	AllocatedResources NodeAllocatedResources `json:"allocatedResources"`
+}
+
+// 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) Node {
+	return Node{
+		ObjectMeta: types.NewObjectMeta(meta),
+		TypeMeta:   types.NewTypeMeta(types.ResourceKindNode),
+	}
+}
+
+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))
+	}
+
+	return result
+}