Пример #1
0
// RunKubelet is responsible for setting up and running a kubelet.  It is used in three different applications:
//   1 Integration tests
//   2 Kubelet binary
//   3 Standalone 'kubernetes' binary
// Eventually, #2 will be replaced with instances of #3
func RunKubelet(kcfg *KubeletConfig) {
	kcfg.Hostname = util.GetHostname(kcfg.HostnameOverride)
	kcfg.Recorder = record.FromSource(api.EventSource{Component: "kubelet", Host: kcfg.Hostname})
	if kcfg.KubeClient != nil {
		kubelet.SetupEventSending(kcfg.KubeClient, kcfg.Hostname)
	} else {
		glog.Infof("No api server defined - no events will be sent.")
	}
	kubelet.SetupLogging()
	kubelet.SetupCapabilities(kcfg.AllowPrivileged)

	credentialprovider.SetPreferredDockercfgPath(kcfg.RootDirectory)

	podCfg := makePodSourceConfig(kcfg)
	k, err := createAndInitKubelet(kcfg, podCfg)
	if err != nil {
		glog.Errorf("Failed to create kubelet: %s", err)
		return
	}
	// process pods and exit.
	if kcfg.Runonce {
		if _, err := k.RunOnce(podCfg.Updates()); err != nil {
			glog.Errorf("--runonce failed: %v", err)
		}
	} else {
		startKubelet(k, podCfg, kcfg)
	}
}
Пример #2
0
func createPodConfigTester(mode PodConfigNotificationMode) (chan<- interface{}, <-chan kubelet.PodUpdate, *PodConfig) {
	config := NewPodConfig(mode, record.FromSource(api.EventSource{Component: "kubelet"}))
	channel := config.Channel(TestSource)
	ch := config.Updates()
	return channel, ch, config
}
Пример #3
0
// Creates a scheduler from a set of registered fit predicate keys and priority keys.
func (f *ConfigFactory) CreateFromKeys(predicateKeys, priorityKeys util.StringSet) (*scheduler.Config, error) {
	glog.V(2).Infof("creating scheduler with fit predicates '%v' and priority functions '%v", predicateKeys, priorityKeys)
	pluginArgs := PluginFactoryArgs{
		PodLister:     f.PodLister,
		ServiceLister: f.ServiceLister,
		NodeLister:    f.NodeLister,
		NodeInfo:      f.NodeLister,
	}
	predicateFuncs, err := getFitPredicateFunctions(predicateKeys, pluginArgs)
	if err != nil {
		return nil, err
	}

	priorityConfigs, err := getPriorityFunctionConfigs(priorityKeys, pluginArgs)
	if err != nil {
		return nil, err
	}

	// Watch and queue pods that need scheduling.
	cache.NewReflector(f.createUnassignedPodLW(), &api.Pod{}, f.PodQueue, 0).Run()

	// Watch and cache all running pods. Scheduler needs to find all pods
	// so it knows where it's safe to place a pod. Cache this locally.
	cache.NewReflector(f.createAssignedPodLW(), &api.Pod{}, f.ScheduledPodLister.Store, 0).Run()

	// Watch minions.
	// Minions may be listed frequently, so provide a local up-to-date cache.
	if false {
		// Disable this code until minions support watches. Note when this code is enabled,
		// we need to make sure minion ListWatcher has proper FieldSelector.
		cache.NewReflector(f.createMinionLW(), &api.Node{}, f.NodeLister.Store, 0).Run()
	} else {
		cache.NewPoller(f.pollMinions, 10*time.Second, f.NodeLister.Store).Run()
	}

	// Watch and cache all service objects. Scheduler needs to find all pods
	// created by the same service, so that it can spread them correctly.
	// Cache this locally.
	cache.NewReflector(f.createServiceLW(), &api.Service{}, f.ServiceLister.Store, 0).Run()

	r := rand.New(rand.NewSource(time.Now().UnixNano()))

	algo := algorithm.NewGenericScheduler(predicateFuncs, priorityConfigs, f.PodLister, r)

	podBackoff := podBackoff{
		perPodBackoff: map[string]*backoffEntry{},
		clock:         realClock{},

		defaultDuration: 1 * time.Second,
		maxDuration:     60 * time.Second,
	}

	return &scheduler.Config{
		Modeler:      f.modeler,
		MinionLister: f.NodeLister,
		Algorithm:    algo,
		Binder:       &binder{f.Client},
		NextPod: func() *api.Pod {
			pod := f.PodQueue.Pop().(*api.Pod)
			glog.V(2).Infof("About to try and schedule pod %v", pod.Name)
			return pod
		},
		Error:    f.makeDefaultErrorFunc(&podBackoff, f.PodQueue),
		Recorder: record.FromSource(api.EventSource{Component: "scheduler"}),
	}, nil
}
Пример #4
0
func TestScheduler(t *testing.T) {
	defer record.StartLogging(t.Logf).Stop()
	errS := errors.New("scheduler")
	errB := errors.New("binder")

	table := []struct {
		injectBindError  error
		sendPod          *api.Pod
		algo             scheduler.Scheduler
		expectErrorPod   *api.Pod
		expectAssumedPod *api.Pod
		expectError      error
		expectBind       *api.Binding
		eventReason      string
	}{
		{
			sendPod:          podWithID("foo", ""),
			algo:             mockScheduler{"machine1", nil},
			expectBind:       &api.Binding{ObjectMeta: api.ObjectMeta{Name: "foo"}, Target: api.ObjectReference{Kind: "Node", Name: "machine1"}},
			expectAssumedPod: podWithID("foo", "machine1"),
			eventReason:      "scheduled",
		}, {
			sendPod:        podWithID("foo", ""),
			algo:           mockScheduler{"machine1", errS},
			expectError:    errS,
			expectErrorPod: podWithID("foo", ""),
			eventReason:    "failedScheduling",
		}, {
			sendPod:         podWithID("foo", ""),
			algo:            mockScheduler{"machine1", nil},
			expectBind:      &api.Binding{ObjectMeta: api.ObjectMeta{Name: "foo"}, Target: api.ObjectReference{Kind: "Node", Name: "machine1"}},
			injectBindError: errB,
			expectError:     errB,
			expectErrorPod:  podWithID("foo", ""),
			eventReason:     "failedScheduling",
		},
	}

	for i, item := range table {
		var gotError error
		var gotPod *api.Pod
		var gotAssumedPod *api.Pod
		var gotBinding *api.Binding
		c := &Config{
			Modeler: &FakeModeler{
				AssumePodFunc: func(pod *api.Pod) {
					gotAssumedPod = pod
				},
			},
			MinionLister: scheduler.FakeMinionLister(
				api.NodeList{Items: []api.Node{{ObjectMeta: api.ObjectMeta{Name: "machine1"}}}},
			),
			Algorithm: item.algo,
			Binder: fakeBinder{func(b *api.Binding) error {
				gotBinding = b
				return item.injectBindError
			}},
			Error: func(p *api.Pod, err error) {
				gotPod = p
				gotError = err
			},
			NextPod: func() *api.Pod {
				return item.sendPod
			},
			Recorder: record.FromSource(api.EventSource{Component: "scheduler"}),
		}
		s := New(c)
		called := make(chan struct{})
		events := record.GetEvents(func(e *api.Event) {
			if e, a := item.eventReason, e.Reason; e != a {
				t.Errorf("%v: expected %v, got %v", i, e, a)
			}
			close(called)
		})
		s.scheduleOne()
		if e, a := item.expectAssumedPod, gotAssumedPod; !reflect.DeepEqual(e, a) {
			t.Errorf("%v: assumed pod: wanted %v, got %v", i, e, a)
		}
		if e, a := item.expectErrorPod, gotPod; !reflect.DeepEqual(e, a) {
			t.Errorf("%v: error pod: wanted %v, got %v", i, e, a)
		}
		if e, a := item.expectError, gotError; !reflect.DeepEqual(e, a) {
			t.Errorf("%v: error: wanted %v, got %v", i, e, a)
		}
		if e, a := item.expectBind, gotBinding; !reflect.DeepEqual(e, a) {
			t.Errorf("%v: error: %s", i, util.ObjectDiff(e, a))
		}
		<-called
		events.Stop()
	}
}