118 lines
3.2 KiB
Go
118 lines
3.2 KiB
Go
package top
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import (
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"context"
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"fmt"
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"github.com/spf13/cobra"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/cli-runtime/pkg/genericclioptions"
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"k8s.io/client-go/kubernetes"
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cmdutil "k8s.io/kubectl/pkg/cmd/util"
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"k8s.io/kubectl/pkg/util/templates"
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metricsapi "k8s.io/metrics/pkg/apis/metrics"
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metricsclientset "k8s.io/metrics/pkg/client/clientset/versioned"
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karmadaclientset "github.com/karmada-io/karmada/pkg/generated/clientset/versioned"
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"github.com/karmada-io/karmada/pkg/karmadactl/util"
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)
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const (
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sortByCPU = "cpu"
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sortByMemory = "memory"
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)
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var (
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supportedMetricsAPIVersions = []string{
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"v1beta1",
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}
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topLong = templates.LongDesc(`
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Display Resource (CPU/Memory) usage of member clusters.
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The top command allows you to see the resource consumption for pods of member clusters.
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This command requires karmada-metrics-adapter to be correctly configured and working on the Karmada control plane and
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Metrics Server to be correctly configured and working on the member clusters.`)
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)
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func NewCmdTop(f util.Factory, parentCommand string, streams genericclioptions.IOStreams) *cobra.Command {
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cmd := &cobra.Command{
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Use: "top",
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Short: "Display resource (CPU/memory) usage of member clusters",
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Long: topLong,
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Run: cmdutil.DefaultSubCommandRun(streams.ErrOut),
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}
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// create subcommands
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cmd.AddCommand(NewCmdTopPod(f, parentCommand, nil, streams))
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return cmd
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}
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func SupportedMetricsAPIVersionAvailable(discoveredAPIGroups *metav1.APIGroupList) bool {
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for _, discoveredAPIGroup := range discoveredAPIGroups.Groups {
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if discoveredAPIGroup.Name != metricsapi.GroupName {
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continue
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}
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for _, version := range discoveredAPIGroup.Versions {
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for _, supportedVersion := range supportedMetricsAPIVersions {
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if version.Version == supportedVersion {
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return true
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}
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}
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}
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}
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return false
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}
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func GenClusterList(clientSet karmadaclientset.Interface, clusters []string) ([]string, error) {
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if len(clusters) != 0 {
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return clusters, nil
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}
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clusterList, err := clientSet.ClusterV1alpha1().Clusters().List(context.TODO(), metav1.ListOptions{})
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if err != nil {
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return nil, fmt.Errorf("failed to list all member clusters in control plane, err: %w", err)
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}
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for i := range clusterList.Items {
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clusters = append(clusters, clusterList.Items[i].Name)
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}
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return clusters, nil
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}
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func GetMemberAndMetricsClientSet(f util.Factory,
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cluster string, useProtocolBuffers bool) (*kubernetes.Clientset, *metricsclientset.Clientset, error) {
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memberFactory, err := f.FactoryForMemberCluster(cluster)
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if err != nil {
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return nil, nil, err
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}
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clientset, err := memberFactory.KubernetesClientSet()
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if err != nil {
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return nil, nil, err
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}
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discoveryClient := clientset.DiscoveryClient
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apiGroups, err := discoveryClient.ServerGroups()
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if err != nil {
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return nil, nil, err
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}
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metricsAPIAvailable := SupportedMetricsAPIVersionAvailable(apiGroups)
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if !metricsAPIAvailable {
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return nil, nil, fmt.Errorf("Metrics API not available")
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}
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config, err := memberFactory.ToRESTConfig()
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if err != nil {
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return nil, nil, err
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}
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if useProtocolBuffers {
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config.ContentType = "application/vnd.kubernetes.protobuf"
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}
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metricsClient, err := metricsclientset.NewForConfig(config)
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if err != nil {
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return nil, nil, err
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}
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return clientset, metricsClient, nil
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}
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