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

cmd/kubeadm/app/phases/kubelet/BUILD

@@ -29,8 +29,8 @@ go_library(
         "//staging/src/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/util/version:go_default_library",
         "//staging/src/k8s.io/client-go/kubernetes:go_default_library",
-        "//vendor/github.com/golang/glog:go_default_library",
         "//vendor/github.com/pkg/errors:go_default_library",
+        "//vendor/k8s.io/klog:go_default_library",
         "//vendor/k8s.io/utils/exec:go_default_library",
     ],
 )

cmd/kubeadm/app/phases/kubelet/flags.go

@@ -23,8 +23,8 @@ import (
 	"path/filepath"
 	"strings"
 
-	"github.com/golang/glog"
 	"github.com/pkg/errors"
+	"k8s.io/klog"
 
 	kubeadmapi "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm"
 	kubeadmapiv1beta1 "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm/v1beta1"
@@ -78,7 +78,7 @@ func buildKubeletArgMap(opts kubeletFlagsOpts) map[string]string {
 		kubeletFlags["network-plugin"] = "cni"
 		driver, err := kubeadmutil.GetCgroupDriverDocker(opts.execer)
 		if err != nil {
-			glog.Warningf("cannot automatically assign a '--cgroup-driver' value when starting the Kubelet: %v\n", err)
+			klog.Warningf("cannot automatically assign a '--cgroup-driver' value when starting the Kubelet: %v\n", err)
 		} else {
 			kubeletFlags["cgroup-driver"] = driver
 		}
@@ -103,7 +103,7 @@ func buildKubeletArgMap(opts kubeletFlagsOpts) map[string]string {
 
 	// Make sure the node name we're passed will work with Kubelet
 	if opts.nodeRegOpts.Name != "" && opts.nodeRegOpts.Name != opts.defaultHostname {
-		glog.V(1).Infof("setting kubelet hostname-override to %q", opts.nodeRegOpts.Name)
+		klog.V(1).Infof("setting kubelet hostname-override to %q", opts.nodeRegOpts.Name)
 		kubeletFlags["hostname-override"] = opts.nodeRegOpts.Name
 	}