Allow changing Schedulers RateLimitter setting during startup.

cmd/integration/integration.go

@@ -176,7 +176,7 @@ func startComponents(firstManifestURL, secondManifestURL, apiVersion string) (st
 	handler.delegate = m.Handler
 
 	// Scheduler
-	schedulerConfigFactory := factory.NewConfigFactory(cl)
+	schedulerConfigFactory := factory.NewConfigFactory(cl, nil)
 	schedulerConfig, err := schedulerConfigFactory.Create()
 	if err != nil {
 		glog.Fatalf("Couldn't create scheduler config: %v", err)

cmd/kubernetes/kubernetes.go

@@ -65,6 +65,11 @@ var (
 	deletingPodsBurst      = flag.Int("deleting-pods-burst", 10, "")
 )
 
+const (
+	bindPodsQps   = 15
+	bindPodsBurst = 20
+)
+
 type delegateHandler struct {
 	delegate http.Handler
 }
@@ -118,7 +123,7 @@ func runApiServer(etcdClient tools.EtcdClient, addr net.IP, port int, masterServ
 // RunScheduler starts up a scheduler in it's own goroutine
 func runScheduler(cl *client.Client) {
 	// Scheduler
-	schedulerConfigFactory := factory.NewConfigFactory(cl)
+	schedulerConfigFactory := factory.NewConfigFactory(cl, util.NewTokenBucketRateLimiter(bindPodsQps, bindPodsBurst))
 	schedulerConfig, err := schedulerConfigFactory.Create()
 	if err != nil {
 		glog.Fatalf("Couldn't create scheduler config: %v", err)

plugin/cmd/kube-scheduler/app/server.go

@@ -54,6 +54,8 @@ type SchedulerServer struct {
 	EnableProfiling   bool
 	Master            string
 	Kubeconfig        string
+	BindPodsQPS       float32
+	BindPodsBurst     int
 }
 
 // NewSchedulerServer creates a new SchedulerServer with default parameters
@@ -75,6 +77,8 @@ func (s *SchedulerServer) AddFlags(fs *pflag.FlagSet) {
 	fs.BoolVar(&s.EnableProfiling, "profiling", true, "Enable profiling via web interface host:port/debug/pprof/")
 	fs.StringVar(&s.Master, "master", s.Master, "The address of the Kubernetes API server (overrides any value in kubeconfig)")
 	fs.StringVar(&s.Kubeconfig, "kubeconfig", s.Kubeconfig, "Path to kubeconfig file with authorization and master location information.")
+	fs.Float32Var(&s.BindPodsQPS, "bind-pods-qps", 15.0, "Number of bindings per second scheduler is allowed to continuously make")
+	fs.IntVar(&s.BindPodsBurst, "bind-pods-burst", 20, "Number of bindings per second scheduler is allowed to make during bursts")
 }
 
 // Run runs the specified SchedulerServer.  This should never exit.
@@ -116,7 +120,7 @@ func (s *SchedulerServer) Run(_ []string) error {
 		glog.Fatal(server.ListenAndServe())
 	}()
 
-	configFactory := factory.NewConfigFactory(kubeClient)
+	configFactory := factory.NewConfigFactory(kubeClient, util.NewTokenBucketRateLimiter(s.BindPodsQPS, s.BindPodsBurst))
 	config, err := s.createConfig(configFactory)
 	if err != nil {
 		glog.Fatalf("Failed to create scheduler configuration: %v", err)

plugin/pkg/scheduler/factory/factory.go

@@ -38,13 +38,6 @@ import (
 	"github.com/golang/glog"
 )
 
-// Rate limitations for binding pods to hosts.
-// TODO: expose these as cmd line flags.
-const (
-	BindPodsQps   = 15
-	BindPodsBurst = 20
-)
-
 // ConfigFactory knows how to fill out a scheduler config with its support functions.
 type ConfigFactory struct {
 	Client *client.Client
@@ -71,7 +64,7 @@ type ConfigFactory struct {
 }
 
 // Initializes the factory.
-func NewConfigFactory(client *client.Client) *ConfigFactory {
+func NewConfigFactory(client *client.Client, rateLimiter util.RateLimiter) *ConfigFactory {
 	c := &ConfigFactory{
 		Client:             client,
 		PodQueue:           cache.NewFIFO(cache.MetaNamespaceKeyFunc),
@@ -85,7 +78,7 @@ func NewConfigFactory(client *client.Client) *ConfigFactory {
 	modeler := scheduler.NewSimpleModeler(&cache.StoreToPodLister{c.PodQueue}, c.ScheduledPodLister)
 	c.modeler = modeler
 	c.PodLister = modeler.PodLister()
-	c.BindPodsRateLimiter = util.NewTokenBucketRateLimiter(BindPodsQps, BindPodsBurst)
+	c.BindPodsRateLimiter = rateLimiter
 
 	// On add/delete to the scheduled pods, remove from the assumed pods.
 	// We construct this here instead of in CreateFromKeys because

plugin/pkg/scheduler/factory/factory_test.go

@@ -44,7 +44,7 @@ func TestCreate(t *testing.T) {
 	server := httptest.NewServer(&handler)
 	defer server.Close()
 	client := client.NewOrDie(&client.Config{Host: server.URL, Version: testapi.Version()})
-	factory := NewConfigFactory(client)
+	factory := NewConfigFactory(client, nil)
 	factory.Create()
 }
 
@@ -62,7 +62,7 @@ func TestCreateFromConfig(t *testing.T) {
 	server := httptest.NewServer(&handler)
 	defer server.Close()
 	client := client.NewOrDie(&client.Config{Host: server.URL, Version: testapi.Version()})
-	factory := NewConfigFactory(client)
+	factory := NewConfigFactory(client, nil)
 
 	// Pre-register some predicate and priority functions
 	RegisterFitPredicate("PredicateOne", PredicateOne)
@@ -104,7 +104,7 @@ func TestCreateFromEmptyConfig(t *testing.T) {
 	server := httptest.NewServer(&handler)
 	defer server.Close()
 	client := client.NewOrDie(&client.Config{Host: server.URL, Version: testapi.Version()})
-	factory := NewConfigFactory(client)
+	factory := NewConfigFactory(client, nil)
 
 	configData = []byte(`{}`)
 	err := latestschedulerapi.Codec.DecodeInto(configData, &policy)
@@ -150,7 +150,7 @@ func TestDefaultErrorFunc(t *testing.T) {
 	mux.Handle(testapi.ResourcePath("pods", "bar", "foo"), &handler)
 	server := httptest.NewServer(mux)
 	defer server.Close()
-	factory := NewConfigFactory(client.NewOrDie(&client.Config{Host: server.URL, Version: testapi.Version()}))
+	factory := NewConfigFactory(client.NewOrDie(&client.Config{Host: server.URL, Version: testapi.Version()}), nil)
 	queue := cache.NewFIFO(cache.MetaNamespaceKeyFunc)
 	podBackoff := podBackoff{
 		perPodBackoff:   map[string]*backoffEntry{},

test/integration/scheduler_test.go

@@ -79,7 +79,7 @@ func TestUnschedulableNodes(t *testing.T) {
 
 	restClient := client.NewOrDie(&client.Config{Host: s.URL, Version: testapi.Version()})
 
-	schedulerConfigFactory := factory.NewConfigFactory(restClient)
+	schedulerConfigFactory := factory.NewConfigFactory(restClient, nil)
 	schedulerConfig, err := schedulerConfigFactory.Create()
 	if err != nil {
 		t.Fatalf("Couldn't create scheduler config: %v", err)