Move from glog to klog

- Move from the old github.com/golang/glog to k8s.io/klog
- klog as explicit InitFlags() so we add them as necessary
- we update the other repositories that we vendor that made a similar
change from glog to klog
  * github.com/kubernetes/repo-infra
  * k8s.io/gengo/
  * k8s.io/kube-openapi/
  * github.com/google/cadvisor
- Entirely remove all references to glog
- Fix some tests by explicit InitFlags in their init() methods

Change-Id: I92db545ff36fcec83afe98f550c9e630098b3135

Kubernetes-commit: 954996e231074dc7429f7be1256a579bedd8344c

tools/clientcmd/client_config.go

@@ -24,8 +24,8 @@ import (
 	"os"
 	"strings"
 
-	"github.com/golang/glog"
 	"github.com/imdario/mergo"
+	"k8s.io/klog"
 
 	restclient "k8s.io/client-go/rest"
 	clientauth "k8s.io/client-go/tools/auth"
@@ -545,12 +545,12 @@ func (config *inClusterClientConfig) Possible() bool {
 // to the default config.
 func BuildConfigFromFlags(masterUrl, kubeconfigPath string) (*restclient.Config, error) {
 	if kubeconfigPath == "" && masterUrl == "" {
-		glog.Warningf("Neither --kubeconfig nor --master was specified.  Using the inClusterConfig.  This might not work.")
+		klog.Warningf("Neither --kubeconfig nor --master was specified.  Using the inClusterConfig.  This might not work.")
 		kubeconfig, err := restclient.InClusterConfig()
 		if err == nil {
 			return kubeconfig, nil
 		}
-		glog.Warning("error creating inClusterConfig, falling back to default config: ", err)
+		klog.Warning("error creating inClusterConfig, falling back to default config: ", err)
 	}
 	return NewNonInteractiveDeferredLoadingClientConfig(
 		&ClientConfigLoadingRules{ExplicitPath: kubeconfigPath},

tools/clientcmd/config.go

@@ -24,7 +24,7 @@ import (
 	"reflect"
 	"sort"
 
-	"github.com/golang/glog"
+	"k8s.io/klog"
 
 	restclient "k8s.io/client-go/rest"
 	clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
@@ -483,7 +483,7 @@ func getConfigFromFile(filename string) (*clientcmdapi.Config, error) {
 func GetConfigFromFileOrDie(filename string) *clientcmdapi.Config {
 	config, err := getConfigFromFile(filename)
 	if err != nil {
-		glog.FatalDepth(1, err)
+		klog.FatalDepth(1, err)
 	}
 
 	return config

tools/clientcmd/loader.go

@@ -27,8 +27,8 @@ import (
 	goruntime "runtime"
 	"strings"
 
-	"github.com/golang/glog"
 	"github.com/imdario/mergo"
+	"k8s.io/klog"
 
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/runtime/schema"
@@ -356,7 +356,7 @@ func LoadFromFile(filename string) (*clientcmdapi.Config, error) {
 	if err != nil {
 		return nil, err
 	}
-	glog.V(6).Infoln("Config loaded from file", filename)
+	klog.V(6).Infoln("Config loaded from file", filename)
 
 	// set LocationOfOrigin on every Cluster, User, and Context
 	for key, obj := range config.AuthInfos {

tools/clientcmd/merged_client_builder.go

@@ -20,7 +20,7 @@ import (
 	"io"
 	"sync"
 
-	"github.com/golang/glog"
+	"k8s.io/klog"
 
 	restclient "k8s.io/client-go/rest"
 	clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
@@ -119,7 +119,7 @@ func (config *DeferredLoadingClientConfig) ClientConfig() (*restclient.Config, e
 
 	// check for in-cluster configuration and use it
 	if config.icc.Possible() {
-		glog.V(4).Infof("Using in-cluster configuration")
+		klog.V(4).Infof("Using in-cluster configuration")
 		return config.icc.ClientConfig()
 	}
 
@@ -156,7 +156,7 @@ func (config *DeferredLoadingClientConfig) Namespace() (string, bool, error) {
 		}
 	}
 
-	glog.V(4).Infof("Using in-cluster namespace")
+	klog.V(4).Infof("Using in-cluster namespace")
 
 	// allow the namespace from the service account token directory to be used.
 	return config.icc.Namespace()