k8s 上简单实现deviceplugin demo

main.go

@@ -0,0 +1,70 @@
+package main
+
+import (
+	"flag"
+	"os"
+	"syscall"
+
+	"github.com/fsnotify/fsnotify"
+	log "github.com/sirupsen/logrus"
+	pluginapi "k8s.io/kubelet/pkg/apis/deviceplugin/v1beta1"
+)
+
+func main() {
+	// Parse command-line arguments
+	flag.CommandLine = flag.NewFlagSet(os.Args[0], flag.ExitOnError)
+	flagLogLevel := flag.String("log-level", "info", "Define the logging level: error, info, debug.")
+	flag.Parse()
+
+	switch *flagLogLevel {
+	case "debug":
+		log.SetLevel(log.DebugLevel)
+	case "info":
+		log.SetLevel(log.InfoLevel)
+	}
+
+	log.Println("Starting FS watcher.")
+	watcher, err := newFSWatcher(pluginapi.DevicePluginPath)
+	if err != nil {
+		log.Printf("Failed to created FS watcher: %s.", err)
+		os.Exit(1)
+	}
+	defer watcher.Close()
+
+	log.Println("Starting OS watcher.")
+	sigs := newOSWatcher(syscall.SIGHUP, syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT)
+
+	restart := true
+	var devicePlugin *FPGADevicePlugin
+L:
+	for {
+		if restart {
+			devicePlugin = NewFPGADevicePlugin()
+			restart = false
+		}
+
+		select {
+		case update := <-devicePlugin.updateChan:
+			devicePlugin.checkDeviceUpdate(update)
+
+		case event := <-watcher.Events:
+			if event.Name == pluginapi.KubeletSocket && event.Op&fsnotify.Create == fsnotify.Create {
+				log.Printf("inotify: %s created, restarting.", pluginapi.KubeletSocket)
+				restart = true
+			}
+
+		case err := <-watcher.Errors:
+			log.Printf("inotify: %s", err)
+
+		case s := <-sigs:
+			switch s {
+			case syscall.SIGHUP:
+				log.Println("Received SIGHUP, restarting.")
+				restart = true
+			default:
+				log.Printf("Received signal \"%v\", shutting down.", s)
+				break L
+			}
+		}
+	}
+}