add log healthz check

Author: liggitt

Diff for: pkg/cmd/openshift-controller-manager/controller/standalone_apiserver.go

@@ -34,7 +34,7 @@ func RunControllerServer(servingInfo configapi.HTTPServingInfo, kubeExternal cli
 
 	mux := genericmux.NewPathRecorderMux("master-healthz")
 
-	healthz.InstallHandler(mux, healthz.PingHealthz)
+	healthz.InstallHandler(mux, healthz.PingHealthz, healthz.LogHealthz)
 	initReadinessCheckRoute(mux, "/healthz/ready", func() bool { return true })
 	genericroutes.Profiling{}.Install(mux)
 	genericroutes.MetricsWithReset{}.Install(mux)

Diff for: test/integration/master_routes_test.go

@@ -106,6 +106,7 @@ var expectedIndex = []string{
 	"/healthz",
 	"/healthz/autoregister-completion",
 	"/healthz/etcd",
+	"/healthz/log",
 	"/healthz/ping",
 	"/healthz/poststarthook/apiservice-openapi-controller",
 	"/healthz/poststarthook/apiservice-registration-controller",