func main() {
// First log our starting config, and then set up.
flag.Set("logtostderr", "true") // This spoofs glog into teeing logs to stderr.
defer log.Flush()
pflag.Parse()
log.Infof("Invoked by %v", os.Args)
resolution := time.Second * time.Duration(*res)
// Initialize the configuration.
kubeletCfg, ctrlCfg, err := config.NewConfigs(*zone, *project, *cluster, *kubeletHost, *kubeletPort, *ctrlPort, resolution)
if err != nil {
log.Fatalf("Failed to initialize configuration: %v", err)
}
// Create objects for kubelet monitoring.
kubeletSrc, err := kubelet.NewSource(kubeletCfg)
if err != nil {
log.Fatalf("Failed to create a kubelet source with config %v: %v", kubeletCfg, err)
}
log.Infof("The kubelet source is initialized with config %v.", kubeletCfg)
// Create objects for kube-controller monitoring.
ctrlSrc, err := controller.NewSource(ctrlCfg)
if err != nil {
log.Fatalf("Failed to create a kube-controller source with config %v: %v", ctrlCfg, err)
}
log.Infof("The kube-controller source is initialized with config %v.", ctrlCfg)
// Create a GCM client.
client, err := google.DefaultClient(context.Background(), scope)
if err != nil {
log.Fatalf("Failed to create a client with default context and scope %s, err: %v", scope, err)
}
service, err := v3.New(client)
if err != nil {
log.Fatalf("Failed to create a GCM v3 API service object: %v", err)
}
// Determine the GCE endpoint.
if *gcmEndpoint != "" {
service.BasePath = *gcmEndpoint
}
log.Infof("Using GCM endpoint %q", service.BasePath)
for {
go monitor.Once(kubeletSrc, service)
go monitor.Once(ctrlSrc, service)
time.Sleep(resolution)
}
}
func main() {
// First log our starting config, and then set up.
flag.Set("logtostderr", "true") // This spoofs glog into teeing logs to stderr.
defer log.Flush()
log.Infof("Invoked by %v", os.Args)
pflag.Parse()
// Determine what zone and project we're monitoring.
zone, err := getZone(*zoneArg)
if err != nil {
log.Fatalf("Failed to get zone: %v", err)
}
project, err := getProjectID(*projectArg)
if err != nil {
log.Fatalf("Failed to get project: %v", err)
}
cluster, err := getCluster(*clusterArg)
if err != nil {
log.Fatalf("Failed to get cluster: %v", err)
}
kubeletHost, err := getKubeletHost(*kubeletHostArg)
if err != nil {
log.Fatalf("Failed to get kubelet host: %v", err)
}
log.Infof("Monitoring kubelet %s in cluster {%s, %s, %s}", kubeletHost, zone, project, cluster)
resolution := time.Second * time.Duration(*resolutionArg)
translator := monitor.NewTranslator(zone, project, cluster, kubeletHost, resolution)
log.Info("New Translator successfully created.")
// NewKubeletClient validates its own inputs.
kubelet, err := monitor.NewKubeletClient(kubeletHost, *port, nil)
if err != nil {
log.Fatalf("Failed to create a Kubelet client with host %s and port %d: %v", kubeletHost, *port, err)
}
log.Info("Successfully created kubelet client.")
// Create a GCM client.
name := fmt.Sprintf("projects/%s", project)
client, err := google.DefaultClient(context.Background(), scope)
if err != nil {
log.Fatalf("Failed to create a client with default context and scope %s, err: %v", scope, err)
}
service, err := v3.New(client)
if err != nil {
log.Fatalf("Failed to create a GCM v3 API service object: %v", err)
}
// Determine the GCE endpoint.
if *gcmEndpoint != "" {
service.BasePath = *gcmEndpoint
}
log.Infof("Using GCM endpoint %q", service.BasePath)
for {
go func() {
// Get the latest summary.
summary, err := kubelet.GetSummary()
if err != nil {
log.Errorf("Failed to get summary from kubelet: %v", err)
return
}
// Translate kubelet's data to GCM v3's format.
tsReq, err := translator.Translate(summary)
if err != nil {
log.Errorf("Failed to translate data from summary %v: %v", summary, err)
return
}
// Push that data to GCM's v3 API.
createCall := service.Projects.TimeSeries.Create(name, tsReq)
if empty, err := createCall.Do(); err != nil {
log.Errorf("Failed to write time series data, empty: %v, err: %v", empty, err)
jsonReq, err := tsReq.MarshalJSON()
if err != nil {
log.Errorf("Failed to marshal time series as JSON")
return
}
log.Errorf("JSON GCM: %s", string(jsonReq[:]))
return
}
}()
time.Sleep(resolution)
}
}