103 lines
3.0 KiB
Go
103 lines
3.0 KiB
Go
package app
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import (
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"context"
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"fmt"
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"net"
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"net/http"
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"strconv"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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"github.com/spf13/cobra"
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"k8s.io/client-go/discovery"
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"k8s.io/client-go/dynamic"
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"k8s.io/client-go/kubernetes"
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"k8s.io/client-go/tools/clientcmd"
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cliflag "k8s.io/component-base/cli/flag"
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"k8s.io/component-base/term"
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"k8s.io/klog/v2"
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"github.com/karmada-io/karmada/cmd/scheduler-estimator/app/options"
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"github.com/karmada-io/karmada/pkg/estimator/server"
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"github.com/karmada-io/karmada/pkg/sharedcli"
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"github.com/karmada-io/karmada/pkg/sharedcli/klogflag"
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"github.com/karmada-io/karmada/pkg/sharedcli/profileflag"
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"github.com/karmada-io/karmada/pkg/version"
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"github.com/karmada-io/karmada/pkg/version/sharedcommand"
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)
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// NewSchedulerEstimatorCommand creates a *cobra.Command object with default parameters
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func NewSchedulerEstimatorCommand(ctx context.Context) *cobra.Command {
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opts := options.NewOptions()
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cmd := &cobra.Command{
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Use: "karmada-scheduler-estimator",
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Long: `The karmada scheduler estimator runs an accurate scheduler estimator of a cluster`,
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RunE: func(cmd *cobra.Command, args []string) error {
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// validate options
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if errs := opts.Validate(); len(errs) != 0 {
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return errs.ToAggregate()
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}
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if err := run(ctx, opts); err != nil {
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return err
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}
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return nil
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},
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}
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fss := cliflag.NamedFlagSets{}
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genericFlagSet := fss.FlagSet("generic")
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opts.AddFlags(genericFlagSet)
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// Set klog flags
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logsFlagSet := fss.FlagSet("logs")
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klogflag.Add(logsFlagSet)
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cmd.AddCommand(sharedcommand.NewCmdVersion("karmada-scheduler-estimator"))
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cmd.Flags().AddFlagSet(genericFlagSet)
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cmd.Flags().AddFlagSet(logsFlagSet)
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cols, _, _ := term.TerminalSize(cmd.OutOrStdout())
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sharedcli.SetUsageAndHelpFunc(cmd, fss, cols)
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return cmd
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}
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func run(ctx context.Context, opts *options.Options) error {
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klog.Infof("karmada-scheduler-estimator version: %s", version.Get())
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go serveHealthzAndMetrics(net.JoinHostPort(opts.BindAddress, strconv.Itoa(opts.SecurePort)))
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profileflag.ListenAndServe(opts.ProfileOpts)
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restConfig, err := clientcmd.BuildConfigFromFlags(opts.Master, opts.KubeConfig)
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if err != nil {
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return fmt.Errorf("error building kubeconfig: %s", err.Error())
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}
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restConfig.QPS, restConfig.Burst = opts.ClusterAPIQPS, opts.ClusterAPIBurst
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kubeClient := kubernetes.NewForConfigOrDie(restConfig)
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dynamicClient := dynamic.NewForConfigOrDie(restConfig)
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discoveryClient := discovery.NewDiscoveryClientForConfigOrDie(restConfig)
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e := server.NewEstimatorServer(kubeClient, dynamicClient, discoveryClient, opts, ctx.Done())
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if err = e.Start(ctx); err != nil {
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klog.Errorf("estimator server exits unexpectedly: %v", err)
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return err
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}
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// never reach here
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return nil
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}
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func serveHealthzAndMetrics(address string) {
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mux := http.NewServeMux()
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mux.HandleFunc("/healthz", func(w http.ResponseWriter, _ *http.Request) {
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w.WriteHeader(http.StatusOK)
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_, _ = w.Write([]byte("ok"))
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})
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mux.Handle("/metrics", promhttp.Handler())
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klog.Fatal(http.ListenAndServe(address, mux))
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}
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