80 lines
1.8 KiB
Go
80 lines
1.8 KiB
Go
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package main
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import (
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"flag"
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"log"
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"os"
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"syscall"
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"github.com/fsnotify/fsnotify"
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pluginapi "k8s.io/kubelet/pkg/apis/deviceplugin/v1beta1"
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)
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func main() {
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var (
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mountsAllowed = 5
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)
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flag.IntVar(&mountsAllowed, "mounts_allowed", 5, "maximum times the fuse device can be mounted")
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flag.Parse()
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log.Println("Starting")
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defer func() { log.Println("Stopped:") }()
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log.Println("Starting FS watcher.")
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watcher, err := newFSWatcher(pluginapi.DevicePluginPath)
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if err != nil {
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log.Println("Failed to created FS watcher.")
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os.Exit(1)
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}
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defer watcher.Close()
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log.Println("Starting OS watcher.")
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sigs := newOSWatcher(syscall.SIGHUP, syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT)
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restart := true
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var devicePlugin *FuseDevicePlugin
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L:
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for {
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if restart {
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if devicePlugin != nil {
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if err := devicePlugin.Stop(); err != nil {
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log.Printf("Failed to stop plugin: %+v", err)
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}
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}
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log.Printf("Max device count: %d", mountsAllowed)
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devicePlugin = NewFuseDevicePlugin(mountsAllowed)
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if err := devicePlugin.Serve(); err != nil {
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log.Println("Could not contact Kubelet, retrying. Did you enable the device plugin feature gate?")
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} else {
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restart = false
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}
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}
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select {
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case event := <-watcher.Events:
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if event.Name == pluginapi.KubeletSocket && event.Op&fsnotify.Create == fsnotify.Create {
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log.Printf("Inotify: %s created, restarting.", pluginapi.KubeletSocket)
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restart = true
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}
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case err := <-watcher.Errors:
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log.Printf("Inotify: %s", err)
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case s := <-sigs:
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switch s {
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case syscall.SIGHUP:
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log.Println("Received SIGHUP, restarting.")
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restart = true
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default:
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log.Printf("Received signal \"%v\", shutting down.", s)
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if err := devicePlugin.Stop(); err != nil {
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log.Printf("Failed to stop plugin: %+v", err)
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}
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break L
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}
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}
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}
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}
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