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main.go
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main.go
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package main
import (
"flag"
"os"
"os/signal"
"syscall"
"github.com/dtaniwaki/k8s-virtual-device-plugin/pkg"
"github.com/golang/glog"
)
var (
Version string = "Unknown"
Revision string = "Unknown"
GitTagState string = "Unknown"
GitTreeState string = "Unknown"
)
func main() {
noRegister := flag.Bool("no-register", false, "Run without registering to kubelet")
metricsPort := flag.Int("metrics-port", 2112, "Metrics port")
flag.Parse()
err := flag.Lookup("logtostderr").Value.Set("true")
if err != nil {
glog.Fatal(err)
}
tagDirtySuffix := ""
if GitTagState != "clean" {
tagDirtySuffix = "-dirty"
}
treeDirtySuffix := ""
if GitTreeState != "clean" {
treeDirtySuffix = "-dirty"
}
glog.Infof("Starging K8s Virtual Device Plugin %s%s [%s%s].", Version, tagDirtySuffix, Revision, treeDirtySuffix)
deviceFilePath := flag.Arg(0)
if deviceFilePath == "" {
glog.Fatalf("Device file path is required")
}
glog.Infof("Using device defined in %s.", deviceFilePath)
devConfig, err := pkg.GetVirtualDeviceConfig(deviceFilePath)
if err != nil {
glog.Fatal(err)
}
vdm, err := pkg.NewVirtualDeviceManager(*devConfig)
if err != nil {
glog.Fatal(err)
}
// Respond to syscalls for termination
sigs := make(chan os.Signal, 1)
signal.Notify(sigs, syscall.SIGHUP, syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT)
// Start grpc server
err = vdm.Start()
if err != nil {
glog.Fatalf("Could not start device plugin: %v", err)
}
defer func() {
err := vdm.Stop()
if err != nil {
glog.Error(err)
}
}()
glog.Infof("Starting to serve on %s", devConfig.SocketName)
if !*noRegister {
// Registers with Kubelet.
err = vdm.Register()
if err != nil {
glog.Fatal(err)
}
glog.Infof("device-plugin registered")
}
metricsServer := pkg.NewMetricsServer(*metricsPort, *devConfig)
err = metricsServer.Start()
if err != nil {
glog.Fatal(err)
}
defer func() {
err := metricsServer.Stop()
if err != nil {
glog.Error(err)
}
}()
s := <-sigs
glog.Infof("Received signal \"%v\", shutting down.", s)
}