Golang predicates.MapPodsToMachines函数代码示例

// Filters the minions to find the ones that fit based on the given predicate functions
// Each minion is passed through the predicate functions to determine if it is a fit
func findNodesThatFit(pod *api.Pod, podLister algorithm.PodLister, predicateFuncs map[string]algorithm.FitPredicate, nodes api.NodeList) (api.NodeList, FailedPredicateMap, error) {
	filtered := []api.Node{}
	machineToPods, err := predicates.MapPodsToMachines(podLister)
	failedPredicateMap := FailedPredicateMap{}
	if err != nil {
		return api.NodeList{}, FailedPredicateMap{}, err
	}
	for _, node := range nodes.Items {
		fits := true
		for name, predicate := range predicateFuncs {
			fit, err := predicate(pod, machineToPods[node.Name], node.Name)
			if err != nil {
				return api.NodeList{}, FailedPredicateMap{}, err
			}
			if !fit {
				fits = false
				if _, found := failedPredicateMap[node.Name]; !found {
					failedPredicateMap[node.Name] = util.StringSet{}
				}
				failedPredicateMap[node.Name].Insert(name)
				break
			}
		}
		if fits {
			filtered = append(filtered, node)
		}
	}
	return api.NodeList{Items: filtered}, failedPredicateMap, nil
}

func (g *genericScheduler) Schedule(pod *api.Pod, nodeLister algorithm.NodeLister) (string, error) {
	nodes, err := nodeLister.List()
	if err != nil {
		return "", err
	}
	if len(nodes.Items) == 0 {
		return "", ErrNoNodesAvailable
	}

	// TODO: we should compute this once and dynamically update it using Watch, not constantly re-compute.
	// But at least we're now only doing it in one place
	machinesToPods, err := predicates.MapPodsToMachines(g.pods)
	if err != nil {
		return "", err
	}

	filteredNodes, failedPredicateMap, err := findNodesThatFit(pod, machinesToPods, g.predicates, nodes, g.extenders)
	if err != nil {
		return "", err
	}

	priorityList, err := PrioritizeNodes(pod, machinesToPods, g.pods, g.prioritizers, algorithm.FakeNodeLister(filteredNodes), g.extenders)
	if err != nil {
		return "", err
	}
	if len(priorityList) == 0 {
		return "", &FitError{
			Pod:              pod,
			FailedPredicates: failedPredicateMap,
		}
	}

	return g.selectHost(priorityList)
}

// BalancedResourceAllocation favors nodes with balanced resource usage rate.
// BalancedResourceAllocation should **NOT** be used alone, and **MUST** be used together with LeastRequestedPriority.
// It calculates the difference between the cpu and memory fracion of capacity, and prioritizes the host based on how
// close the two metrics are to each other.
// Detail: score = 10 - abs(cpuFraction-memoryFraction)*10. The algorithm is partly inspired by:
// "Wei Huang et al. An Energy Efficient Virtual Machine Placement Algorithm with Balanced Resource Utilization"
func BalancedResourceAllocation(pod *api.Pod, podLister algorithm.PodLister, minionLister algorithm.MinionLister) (algorithm.HostPriorityList, error) {
	nodes, err := minionLister.List()
	if err != nil {
		return algorithm.HostPriorityList{}, err
	}
	podsToMachines, err := predicates.MapPodsToMachines(podLister)

	list := algorithm.HostPriorityList{}
	for _, node := range nodes.Items {
		list = append(list, calculateBalancedResourceAllocation(pod, node, podsToMachines[node.Name]))
	}
	return list, nil
}

// LeastRequestedPriority is a priority function that favors nodes with fewer requested resources.
// It calculates the percentage of memory and CPU requested by pods scheduled on the node, and prioritizes
// based on the minimum of the average of the fraction of requested to capacity.
// Details: cpu((capacity - sum(requested)) * 10 / capacity) + memory((capacity - sum(requested)) * 10 / capacity) / 2
func LeastRequestedPriority(pod *api.Pod, podLister algorithm.PodLister, nodeLister algorithm.NodeLister) (algorithm.HostPriorityList, error) {
	nodes, err := nodeLister.List()
	if err != nil {
		return algorithm.HostPriorityList{}, err
	}
	podsToMachines, err := predicates.MapPodsToMachines(podLister)

	list := algorithm.HostPriorityList{}
	for _, node := range nodes.Items {
		list = append(list, calculateResourceOccupancy(pod, node, podsToMachines[node.Name]))
	}
	return list, nil
}

// Filters the nodes to find the ones that fit based on the given predicate functions
// Each node is passed through the predicate functions to determine if it is a fit
func findNodesThatFit(pod *api.Pod, podLister algorithm.PodLister, predicateFuncs map[string]algorithm.FitPredicate, nodes api.NodeList, extenders []algorithm.SchedulerExtender) (api.NodeList, FailedPredicateMap, error) {
	filtered := []api.Node{}
	machineToPods, err := predicates.MapPodsToMachines(podLister)
	failedPredicateMap := FailedPredicateMap{}
	if err != nil {
		return api.NodeList{}, FailedPredicateMap{}, err
	}
	for _, node := range nodes.Items {
		fits := true
		for name, predicate := range predicateFuncs {
			predicates.FailedResourceType = ""
			fit, err := predicate(pod, machineToPods[node.Name], node.Name)
			if err != nil {
				return api.NodeList{}, FailedPredicateMap{}, err
			}
			if !fit {
				fits = false
				if _, found := failedPredicateMap[node.Name]; !found {
					failedPredicateMap[node.Name] = sets.String{}
				}
				if predicates.FailedResourceType != "" {
					failedPredicateMap[node.Name].Insert(predicates.FailedResourceType)
					break
				}
				failedPredicateMap[node.Name].Insert(name)
				break
			}
		}
		if fits {
			filtered = append(filtered, node)
		}
	}
	if len(filtered) > 0 && len(extenders) != 0 {
		for _, extender := range extenders {
			filteredList, err := extender.Filter(pod, &api.NodeList{Items: filtered})
			if err != nil {
				return api.NodeList{}, FailedPredicateMap{}, err
			}
			filtered = filteredList.Items
			if len(filtered) == 0 {
				break
			}
		}
	}
	return api.NodeList{Items: filtered}, failedPredicateMap, nil
}

func CollateTotals(nodes api.NodeList, listner algorithm.PodLister) {
	//	for _,e := range nodes.Items {
	//		fmt.Println("Node Name :: ",e.Name)
	//		fmt.Println("Node Status :: ",e.Status.Capacity)
	//		fmt.Println("Number of Pods",e.Status.Capacity.Pods())
	//	}

	mapping, _ := predicates.MapPodsToMachines(listner)
	for k, v := range mapping {
		glog.Infof("Node Name :: %s", k)
		totalCpu := int64(0)
		totalMem := int64(0)
		for _, pod := range v {
			for _, container := range pod.Spec.Containers {
				requests := container.Resources.Requests
				totalMem += requests.Memory().Value()
				totalCpu += requests.Cpu().MilliValue()
			}

		}
		glog.Infof("Node CPU:: %s", totalCpu)
		glog.Infof("Node Mem:: %s", totalMem)
	}
}

//.........这里部分代码省略.........
			pod:          &api.Pod{Spec: noResources},
			nodes:        []api.Node{makeNode("machine1", 10000, 20000), makeNode("machine2", 10000, 20000)},
			expectedList: []schedulerapi.HostPriority{{"machine1", 4}, {"machine2", 6}},
			test:         "no resources requested, pods scheduled with resources",
			pods: []*api.Pod{
				{Spec: cpuOnly, ObjectMeta: api.ObjectMeta{Labels: labels2}},
				{Spec: cpuOnly, ObjectMeta: api.ObjectMeta{Labels: labels1}},
				{Spec: cpuOnly2, ObjectMeta: api.ObjectMeta{Labels: labels1}},
				{Spec: cpuAndMemory, ObjectMeta: api.ObjectMeta{Labels: labels1}},
			},
		},
		{
			/*
				Node1 scores on 0-10 scale
				CPU Fraction: 6000 / 10000 = 60%
				Memory Fraction: 5000 / 20000 = 25%
				Node1 Score: 10 - (0.6-0.25)*10 = 6

				Node2 scores on 0-10 scale
				CPU Fraction: 6000 / 10000 = 60%
				Memory Fraction: 10000 / 20000 = 50%
				Node2 Score: 10 - (0.6-0.5)*10 = 9
			*/
			pod:          &api.Pod{Spec: cpuAndMemory},
			nodes:        []api.Node{makeNode("machine1", 10000, 20000), makeNode("machine2", 10000, 20000)},
			expectedList: []schedulerapi.HostPriority{{"machine1", 6}, {"machine2", 9}},
			test:         "resources requested, pods scheduled with resources",
			pods: []*api.Pod{
				{Spec: cpuOnly},
				{Spec: cpuAndMemory},
			},
		},
		{
			/*
				Node1 scores on 0-10 scale
				CPU Fraction: 6000 / 10000 = 60%
				Memory Fraction: 5000 / 20000 = 25%
				Node1 Score: 10 - (0.6-0.25)*10 = 6

				Node2 scores on 0-10 scale
				CPU Fraction: 6000 / 10000 = 60%
				Memory Fraction: 10000 / 50000 = 20%
				Node2 Score: 10 - (0.6-0.2)*10 = 6
			*/
			pod:          &api.Pod{Spec: cpuAndMemory},
			nodes:        []api.Node{makeNode("machine1", 10000, 20000), makeNode("machine2", 10000, 50000)},
			expectedList: []schedulerapi.HostPriority{{"machine1", 6}, {"machine2", 6}},
			test:         "resources requested, pods scheduled with resources, differently sized machines",
			pods: []*api.Pod{
				{Spec: cpuOnly},
				{Spec: cpuAndMemory},
			},
		},
		{
			/*
				Node1 scores on 0-10 scale
				CPU Fraction: 6000 / 4000 > 100% ==> Score := 0
				Memory Fraction: 0 / 10000 = 0
				Node1 Score: 0

				Node2 scores on 0-10 scale
				CPU Fraction: 6000 / 4000 > 100% ==> Score := 0
				Memory Fraction 5000 / 10000 = 50%
				Node2 Score: 0
			*/
			pod:          &api.Pod{Spec: cpuOnly},
			nodes:        []api.Node{makeNode("machine1", 4000, 10000), makeNode("machine2", 4000, 10000)},
			expectedList: []schedulerapi.HostPriority{{"machine1", 0}, {"machine2", 0}},
			test:         "requested resources exceed node capacity",
			pods: []*api.Pod{
				{Spec: cpuOnly},
				{Spec: cpuAndMemory},
			},
		},
		{
			pod:          &api.Pod{Spec: noResources},
			nodes:        []api.Node{makeNode("machine1", 0, 0), makeNode("machine2", 0, 0)},
			expectedList: []schedulerapi.HostPriority{{"machine1", 0}, {"machine2", 0}},
			test:         "zero node resources, pods scheduled with resources",
			pods: []*api.Pod{
				{Spec: cpuOnly},
				{Spec: cpuAndMemory},
			},
		},
	}

	for _, test := range tests {
		m2p, err := predicates.MapPodsToMachines(algorithm.FakePodLister(test.pods))
		if err != nil {
			t.Errorf("unexpected error: %v", err)
		}
		list, err := BalancedResourceAllocation(test.pod, m2p, algorithm.FakePodLister(test.pods), algorithm.FakeNodeLister(api.NodeList{Items: test.nodes}))
		if err != nil {
			t.Errorf("unexpected error: %v", err)
		}
		if !reflect.DeepEqual(test.expectedList, list) {
			t.Errorf("%s: expected %#v, got %#v", test.test, test.expectedList, list)
		}
	}
}

func TestZeroRequest(t *testing.T) {
	// A pod with no resources. We expect spreading to count it as having the default resources.
	noResources := api.PodSpec{
		Containers: []api.Container{
			{},
		},
	}
	noResources1 := noResources
	noResources1.NodeName = "machine1"
	// A pod with the same resources as a 0-request pod gets by default as its resources (for spreading).
	small := api.PodSpec{
		Containers: []api.Container{
			{
				Resources: api.ResourceRequirements{
					Requests: api.ResourceList{
						"cpu": resource.MustParse(
							strconv.FormatInt(defaultMilliCpuRequest, 10) + "m"),
						"memory": resource.MustParse(
							strconv.FormatInt(defaultMemoryRequest, 10)),
					},
				},
			},
		},
	}
	small2 := small
	small2.NodeName = "machine2"
	// A larger pod.
	large := api.PodSpec{
		Containers: []api.Container{
			{
				Resources: api.ResourceRequirements{
					Requests: api.ResourceList{
						"cpu": resource.MustParse(
							strconv.FormatInt(defaultMilliCpuRequest*3, 10) + "m"),
						"memory": resource.MustParse(
							strconv.FormatInt(defaultMemoryRequest*3, 10)),
					},
				},
			},
		},
	}
	large1 := large
	large1.NodeName = "machine1"
	large2 := large
	large2.NodeName = "machine2"
	tests := []struct {
		pod   *api.Pod
		pods  []*api.Pod
		nodes []api.Node
		test  string
	}{
		// The point of these next two tests is to show you get the same priority for a zero-request pod
		// as for a pod with the defaults requests, both when the zero-request pod is already on the machine
		// and when the zero-request pod is the one being scheduled.
		{
			pod:   &api.Pod{Spec: noResources},
			nodes: []api.Node{makeNode("machine1", 1000, defaultMemoryRequest*10), makeNode("machine2", 1000, defaultMemoryRequest*10)},
			test:  "test priority of zero-request pod with machine with zero-request pod",
			pods: []*api.Pod{
				{Spec: large1}, {Spec: noResources1},
				{Spec: large2}, {Spec: small2},
			},
		},
		{
			pod:   &api.Pod{Spec: small},
			nodes: []api.Node{makeNode("machine1", 1000, defaultMemoryRequest*10), makeNode("machine2", 1000, defaultMemoryRequest*10)},
			test:  "test priority of nonzero-request pod with machine with zero-request pod",
			pods: []*api.Pod{
				{Spec: large1}, {Spec: noResources1},
				{Spec: large2}, {Spec: small2},
			},
		},
		// The point of this test is to verify that we're not just getting the same score no matter what we schedule.
		{
			pod:   &api.Pod{Spec: large},
			nodes: []api.Node{makeNode("machine1", 1000, defaultMemoryRequest*10), makeNode("machine2", 1000, defaultMemoryRequest*10)},
			test:  "test priority of larger pod with machine with zero-request pod",
			pods: []*api.Pod{
				{Spec: large1}, {Spec: noResources1},
				{Spec: large2}, {Spec: small2},
			},
		},
	}

	const expectedPriority int = 25
	for _, test := range tests {
		m2p, err := predicates.MapPodsToMachines(algorithm.FakePodLister(test.pods))
		if err != nil {
			t.Errorf("unexpected error: %v", err)
		}
		list, err := scheduler.PrioritizeNodes(
			test.pod,
			m2p,
			algorithm.FakePodLister(test.pods),
			// This should match the configuration in defaultPriorities() in
			// plugin/pkg/scheduler/algorithmprovider/defaults/defaults.go if you want
			// to test what's actually in production.
			[]algorithm.PriorityConfig{{Function: LeastRequestedPriority, Weight: 1}, {Function: BalancedResourceAllocation, Weight: 1}, {Function: NewSelectorSpreadPriority(algorithm.FakeServiceLister([]api.Service{}), algorithm.FakeControllerLister([]api.ReplicationController{})), Weight: 1}},
			algorithm.FakeNodeLister(api.NodeList{Items: test.nodes}), []algorithm.SchedulerExtender{})
		if err != nil {
//.........这里部分代码省略.........

//.........这里部分代码省略.........
			pod:          &api.Pod{Spec: noResources},
			nodes:        []api.Node{makeNode("machine1", 10000, 20000), makeNode("machine2", 10000, 20000)},
			expectedList: []schedulerapi.HostPriority{{"machine1", 7}, {"machine2", 5}},
			test:         "no resources requested, pods scheduled with resources",
			pods: []*api.Pod{
				{Spec: cpuOnly, ObjectMeta: api.ObjectMeta{Labels: labels2}},
				{Spec: cpuOnly, ObjectMeta: api.ObjectMeta{Labels: labels1}},
				{Spec: cpuOnly2, ObjectMeta: api.ObjectMeta{Labels: labels1}},
				{Spec: cpuAndMemory, ObjectMeta: api.ObjectMeta{Labels: labels1}},
			},
		},
		{
			/*
				Node1 scores on 0-10 scale
				CPU Score: ((10000 - 6000) *10) / 10000 = 4
				Memory Score: ((20000 - 5000) *10) / 20000 = 7.5
				Node1 Score: (4 + 7.5) / 2 = 5

				Node2 scores on 0-10 scale
				CPU Score: ((10000 - 6000) *10) / 10000 = 4
				Memory Score: ((20000 - 10000) *10) / 20000 = 5
				Node2 Score: (4 + 5) / 2 = 4
			*/
			pod:          &api.Pod{Spec: cpuAndMemory},
			nodes:        []api.Node{makeNode("machine1", 10000, 20000), makeNode("machine2", 10000, 20000)},
			expectedList: []schedulerapi.HostPriority{{"machine1", 5}, {"machine2", 4}},
			test:         "resources requested, pods scheduled with resources",
			pods: []*api.Pod{
				{Spec: cpuOnly},
				{Spec: cpuAndMemory},
			},
		},
		{
			/*
				Node1 scores on 0-10 scale
				CPU Score: ((10000 - 6000) *10) / 10000 = 4
				Memory Score: ((20000 - 5000) *10) / 20000 = 7.5
				Node1 Score: (4 + 7.5) / 2 = 5

				Node2 scores on 0-10 scale
				CPU Score: ((10000 - 6000) *10) / 10000 = 4
				Memory Score: ((50000 - 10000) *10) / 50000 = 8
				Node2 Score: (4 + 8) / 2 = 6
			*/
			pod:          &api.Pod{Spec: cpuAndMemory},
			nodes:        []api.Node{makeNode("machine1", 10000, 20000), makeNode("machine2", 10000, 50000)},
			expectedList: []schedulerapi.HostPriority{{"machine1", 5}, {"machine2", 6}},
			test:         "resources requested, pods scheduled with resources, differently sized machines",
			pods: []*api.Pod{
				{Spec: cpuOnly},
				{Spec: cpuAndMemory},
			},
		},
		{
			/*
				Node1 scores on 0-10 scale
				CPU Score: ((4000 - 6000) *10) / 4000 = 0
				Memory Score: ((10000 - 0) *10) / 10000 = 10
				Node1 Score: (0 + 10) / 2 = 5

				Node2 scores on 0-10 scale
				CPU Score: ((4000 - 6000) *10) / 4000 = 0
				Memory Score: ((10000 - 5000) *10) / 10000 = 5
				Node2 Score: (0 + 5) / 2 = 2
			*/
			pod:          &api.Pod{Spec: cpuOnly},
			nodes:        []api.Node{makeNode("machine1", 4000, 10000), makeNode("machine2", 4000, 10000)},
			expectedList: []schedulerapi.HostPriority{{"machine1", 5}, {"machine2", 2}},
			test:         "requested resources exceed node capacity",
			pods: []*api.Pod{
				{Spec: cpuOnly},
				{Spec: cpuAndMemory},
			},
		},
		{
			pod:          &api.Pod{Spec: noResources},
			nodes:        []api.Node{makeNode("machine1", 0, 0), makeNode("machine2", 0, 0)},
			expectedList: []schedulerapi.HostPriority{{"machine1", 0}, {"machine2", 0}},
			test:         "zero node resources, pods scheduled with resources",
			pods: []*api.Pod{
				{Spec: cpuOnly},
				{Spec: cpuAndMemory},
			},
		},
	}

	for _, test := range tests {
		m2p, err := predicates.MapPodsToMachines(algorithm.FakePodLister(test.pods))
		if err != nil {
			t.Errorf("unexpected error: %v", err)
		}
		list, err := LeastRequestedPriority(test.pod, m2p, algorithm.FakePodLister(test.pods), algorithm.FakeNodeLister(api.NodeList{Items: test.nodes}))
		if err != nil {
			t.Errorf("unexpected error: %v", err)
		}
		if !reflect.DeepEqual(test.expectedList, list) {
			t.Errorf("%s: expected %#v, got %#v", test.test, test.expectedList, list)
		}
	}
}

//.........这里部分代码省略.........
			},
			{
				RepoTags: []string{
					"gcr.io/2000",
				},
				Size: int64(2000 * mb),
			},
		},
	}

	node_250_10 := api.NodeStatus{
		Images: []api.ContainerImage{
			{
				RepoTags: []string{
					"gcr.io/250",
				},
				Size: int64(250 * mb),
			},
			{
				RepoTags: []string{
					"gcr.io/10",
					"gcr.io/10:v1",
				},
				Size: int64(10 * mb),
			},
		},
	}

	tests := []struct {
		pod          *api.Pod
		pods         []*api.Pod
		nodes        []api.Node
		expectedList schedulerapi.HostPriorityList
		test         string
	}{
		{
			// Pod: gcr.io/40 gcr.io/250

			// Node1
			// Image: gcr.io/40 40MB
			// Score: (40M-23M)/97.7M + 1 = 1

			// Node2
			// Image: gcr.io/250 250MB
			// Score: (250M-23M)/97.7M + 1 = 3
			pod:          &api.Pod{Spec: test_40_250},
			nodes:        []api.Node{makeImageNode("machine1", node_40_140_2000), makeImageNode("machine2", node_250_10)},
			expectedList: []schedulerapi.HostPriority{{"machine1", 1}, {"machine2", 3}},
			test:         "two images spread on two nodes, prefer the larger image one",
		},
		{
			// Pod: gcr.io/40 gcr.io/140

			// Node1
			// Image: gcr.io/40 40MB, gcr.io/140 140MB
			// Score: (40M+140M-23M)/97.7M + 1 = 2

			// Node2
			// Image: not present
			// Score: 0
			pod:          &api.Pod{Spec: test_40_140},
			nodes:        []api.Node{makeImageNode("machine1", node_40_140_2000), makeImageNode("machine2", node_250_10)},
			expectedList: []schedulerapi.HostPriority{{"machine1", 2}, {"machine2", 0}},
			test:         "two images on one node, prefer this node",
		},
		{
			// Pod: gcr.io/2000 gcr.io/10

			// Node1
			// Image: gcr.io/2000 2000MB
			// Score: 2000 > max score = 10

			// Node2
			// Image: gcr.io/10 10MB
			// Score: 10 < min score = 0
			pod:          &api.Pod{Spec: test_min_max},
			nodes:        []api.Node{makeImageNode("machine1", node_40_140_2000), makeImageNode("machine2", node_250_10)},
			expectedList: []schedulerapi.HostPriority{{"machine1", 10}, {"machine2", 0}},
			test:         "if exceed limit, use limit",
		},
	}

	for _, test := range tests {
		m2p, err := predicates.MapPodsToMachines(algorithm.FakePodLister(test.pods))
		if err != nil {
			t.Errorf("unexpected error: %v", err)
		}
		list, err := ImageLocalityPriority(test.pod, m2p, algorithm.FakePodLister(test.pods), algorithm.FakeNodeLister(api.NodeList{Items: test.nodes}))
		if err != nil {
			t.Errorf("unexpected error: %v", err)
		}

		sort.Sort(test.expectedList)
		sort.Sort(list)

		if !reflect.DeepEqual(test.expectedList, list) {
			t.Errorf("%s: expected %#v, got %#v", test.test, test.expectedList, list)
		}
	}
}

//.........这里部分代码省略.........
			nodes:    labeledNodes,
			services: []api.Service{{Spec: api.ServiceSpec{Selector: labels1}}},
			expectedList: []schedulerapi.HostPriority{{"machine11", 10}, {"machine12", 10},
				{"machine21", 0}, {"machine22", 0},
				{"machine01", 0}, {"machine02", 0}},
			test: "three pods, one service pod",
		},
		{
			pod: &api.Pod{ObjectMeta: api.ObjectMeta{Labels: labels1}},
			pods: []*api.Pod{
				{Spec: zone1Spec, ObjectMeta: api.ObjectMeta{Labels: labels2}},
				{Spec: zone1Spec, ObjectMeta: api.ObjectMeta{Labels: labels1}},
				{Spec: zone2Spec, ObjectMeta: api.ObjectMeta{Labels: labels1}},
			},
			nodes:    labeledNodes,
			services: []api.Service{{Spec: api.ServiceSpec{Selector: labels1}}},
			expectedList: []schedulerapi.HostPriority{{"machine11", 5}, {"machine12", 5},
				{"machine21", 5}, {"machine22", 5},
				{"machine01", 0}, {"machine02", 0}},
			test: "three pods, two service pods on different machines",
		},
		{
			pod: &api.Pod{ObjectMeta: api.ObjectMeta{Labels: labels1, Namespace: api.NamespaceDefault}},
			pods: []*api.Pod{
				{Spec: zone1Spec, ObjectMeta: api.ObjectMeta{Labels: labels1}},
				{Spec: zone1Spec, ObjectMeta: api.ObjectMeta{Labels: labels1, Namespace: api.NamespaceDefault}},
				{Spec: zone2Spec, ObjectMeta: api.ObjectMeta{Labels: labels1}},
				{Spec: zone2Spec, ObjectMeta: api.ObjectMeta{Labels: labels1, Namespace: "ns1"}},
			},
			nodes:    labeledNodes,
			services: []api.Service{{Spec: api.ServiceSpec{Selector: labels1}, ObjectMeta: api.ObjectMeta{Namespace: api.NamespaceDefault}}},
			expectedList: []schedulerapi.HostPriority{{"machine11", 0}, {"machine12", 0},
				{"machine21", 10}, {"machine22", 10},
				{"machine01", 0}, {"machine02", 0}},
			test: "three service label match pods in different namespaces",
		},
		{
			pod: &api.Pod{ObjectMeta: api.ObjectMeta{Labels: labels1}},
			pods: []*api.Pod{
				{Spec: zone1Spec, ObjectMeta: api.ObjectMeta{Labels: labels2}},
				{Spec: zone1Spec, ObjectMeta: api.ObjectMeta{Labels: labels1}},
				{Spec: zone2Spec, ObjectMeta: api.ObjectMeta{Labels: labels1}},
				{Spec: zone2Spec, ObjectMeta: api.ObjectMeta{Labels: labels1}},
			},
			nodes:    labeledNodes,
			services: []api.Service{{Spec: api.ServiceSpec{Selector: labels1}}},
			expectedList: []schedulerapi.HostPriority{{"machine11", 6}, {"machine12", 6},
				{"machine21", 3}, {"machine22", 3},
				{"machine01", 0}, {"machine02", 0}},
			test: "four pods, three service pods",
		},
		{
			pod: &api.Pod{ObjectMeta: api.ObjectMeta{Labels: labels1}},
			pods: []*api.Pod{
				{Spec: zone1Spec, ObjectMeta: api.ObjectMeta{Labels: labels2}},
				{Spec: zone1Spec, ObjectMeta: api.ObjectMeta{Labels: labels1}},
				{Spec: zone2Spec, ObjectMeta: api.ObjectMeta{Labels: labels1}},
			},
			nodes:    labeledNodes,
			services: []api.Service{{Spec: api.ServiceSpec{Selector: map[string]string{"baz": "blah"}}}},
			expectedList: []schedulerapi.HostPriority{{"machine11", 3}, {"machine12", 3},
				{"machine21", 6}, {"machine22", 6},
				{"machine01", 0}, {"machine02", 0}},
			test: "service with partial pod label matches",
		},
		{
			pod: &api.Pod{ObjectMeta: api.ObjectMeta{Labels: labels1}},
			pods: []*api.Pod{
				{Spec: zone0Spec, ObjectMeta: api.ObjectMeta{Labels: labels1}},
				{Spec: zone1Spec, ObjectMeta: api.ObjectMeta{Labels: labels1}},
				{Spec: zone2Spec, ObjectMeta: api.ObjectMeta{Labels: labels1}},
				{Spec: zone2Spec, ObjectMeta: api.ObjectMeta{Labels: labels1}},
			},
			nodes:    labeledNodes,
			services: []api.Service{{Spec: api.ServiceSpec{Selector: labels1}}},
			expectedList: []schedulerapi.HostPriority{{"machine11", 7}, {"machine12", 7},
				{"machine21", 5}, {"machine22", 5},
				{"machine01", 0}, {"machine02", 0}},
			test: "service pod on non-zoned node",
		},
	}

	for _, test := range tests {
		m2p, err := predicates.MapPodsToMachines(algorithm.FakePodLister(test.pods))
		if err != nil {
			t.Errorf("unexpected error: %v", err)
		}
		zoneSpread := ServiceAntiAffinity{serviceLister: algorithm.FakeServiceLister(test.services), label: "zone"}
		list, err := zoneSpread.CalculateAntiAffinityPriority(test.pod, m2p, algorithm.FakePodLister(test.pods), algorithm.FakeNodeLister(makeLabeledNodeList(test.nodes)))
		if err != nil {
			t.Errorf("unexpected error: %v", err)
		}
		// sort the two lists to avoid failures on account of different ordering
		sort.Sort(test.expectedList)
		sort.Sort(list)
		if !reflect.DeepEqual(test.expectedList, list) {
			t.Errorf("%s: expected %#v, got %#v", test.test, test.expectedList, list)
		}
	}
}

//.........这里部分代码省略.........
			services:     []api.Service{{Spec: api.ServiceSpec{Selector: labels1}}},
			expectedList: []schedulerapi.HostPriority{{"machine1", 0}, {"machine2", 0}},
			test:         "three pods, two service pods on different machines",
		},
		{
			pod: &api.Pod{ObjectMeta: api.ObjectMeta{Labels: labels1}},
			pods: []*api.Pod{
				{Spec: zone1Spec, ObjectMeta: api.ObjectMeta{Labels: labels2}},
				{Spec: zone1Spec, ObjectMeta: api.ObjectMeta{Labels: labels1}},
				{Spec: zone2Spec, ObjectMeta: api.ObjectMeta{Labels: labels1}},
				{Spec: zone2Spec, ObjectMeta: api.ObjectMeta{Labels: labels1}},
			},
			nodes:        []string{"machine1", "machine2"},
			services:     []api.Service{{Spec: api.ServiceSpec{Selector: labels1}}},
			expectedList: []schedulerapi.HostPriority{{"machine1", 5}, {"machine2", 0}},
			test:         "four pods, three service pods",
		},
		{
			pod: &api.Pod{ObjectMeta: api.ObjectMeta{Labels: labels1}},
			pods: []*api.Pod{
				{Spec: zone1Spec, ObjectMeta: api.ObjectMeta{Labels: labels2}},
				{Spec: zone1Spec, ObjectMeta: api.ObjectMeta{Labels: labels1}},
				{Spec: zone2Spec, ObjectMeta: api.ObjectMeta{Labels: labels1}},
			},
			nodes:        []string{"machine1", "machine2"},
			services:     []api.Service{{Spec: api.ServiceSpec{Selector: map[string]string{"baz": "blah"}}}},
			expectedList: []schedulerapi.HostPriority{{"machine1", 0}, {"machine2", 5}},
			test:         "service with partial pod label matches",
		},
		{
			pod: &api.Pod{ObjectMeta: api.ObjectMeta{Labels: labels1}},
			pods: []*api.Pod{
				{Spec: zone1Spec, ObjectMeta: api.ObjectMeta{Labels: labels2}},
				{Spec: zone1Spec, ObjectMeta: api.ObjectMeta{Labels: labels1}},
				{Spec: zone2Spec, ObjectMeta: api.ObjectMeta{Labels: labels1}},
			},
			nodes:    []string{"machine1", "machine2"},
			services: []api.Service{{Spec: api.ServiceSpec{Selector: map[string]string{"baz": "blah"}}}},
			rcs:      []api.ReplicationController{{Spec: api.ReplicationControllerSpec{Selector: map[string]string{"foo": "bar"}}}},
			// "baz=blah" matches both labels1 and labels2, and "foo=bar" matches only labels 1. This means that we assume that we want to
			// do spreading between all pods. The result should be exactly as above.
			expectedList: []schedulerapi.HostPriority{{"machine1", 0}, {"machine2", 5}},
			test:         "service with partial pod label matches with service and replication controller",
		},
		{
			pod: &api.Pod{ObjectMeta: api.ObjectMeta{Labels: map[string]string{"foo": "bar", "bar": "foo"}}},
			pods: []*api.Pod{
				{Spec: zone1Spec, ObjectMeta: api.ObjectMeta{Labels: labels2}},
				{Spec: zone1Spec, ObjectMeta: api.ObjectMeta{Labels: labels1}},
				{Spec: zone2Spec, ObjectMeta: api.ObjectMeta{Labels: labels1}},
			},
			nodes:    []string{"machine1", "machine2"},
			services: []api.Service{{Spec: api.ServiceSpec{Selector: map[string]string{"bar": "foo"}}}},
			rcs:      []api.ReplicationController{{Spec: api.ReplicationControllerSpec{Selector: map[string]string{"foo": "bar"}}}},
			// Taken together Service and Replication Controller should match all Pods, hence result should be equal to one above.
			expectedList: []schedulerapi.HostPriority{{"machine1", 0}, {"machine2", 5}},
			test:         "disjoined service and replication controller should be treated equally",
		},
		{
			pod: &api.Pod{ObjectMeta: api.ObjectMeta{Labels: labels1}},
			pods: []*api.Pod{
				{Spec: zone1Spec, ObjectMeta: api.ObjectMeta{Labels: labels2}},
				{Spec: zone1Spec, ObjectMeta: api.ObjectMeta{Labels: labels1}},
				{Spec: zone2Spec, ObjectMeta: api.ObjectMeta{Labels: labels1}},
			},
			nodes: []string{"machine1", "machine2"},
			rcs:   []api.ReplicationController{{Spec: api.ReplicationControllerSpec{Selector: map[string]string{"foo": "bar"}}}},
			// Both Nodes have one pod from the given RC, hence both get 0 score.
			expectedList: []schedulerapi.HostPriority{{"machine1", 0}, {"machine2", 0}},
			test:         "Replication controller with partial pod label matches",
		},
		{
			pod: &api.Pod{ObjectMeta: api.ObjectMeta{Labels: labels1}},
			pods: []*api.Pod{
				{Spec: zone1Spec, ObjectMeta: api.ObjectMeta{Labels: labels2}},
				{Spec: zone1Spec, ObjectMeta: api.ObjectMeta{Labels: labels1}},
				{Spec: zone2Spec, ObjectMeta: api.ObjectMeta{Labels: labels1}},
			},
			nodes:        []string{"machine1", "machine2"},
			rcs:          []api.ReplicationController{{Spec: api.ReplicationControllerSpec{Selector: map[string]string{"baz": "blah"}}}},
			expectedList: []schedulerapi.HostPriority{{"machine1", 0}, {"machine2", 5}},
			test:         "Replication controller with partial pod label matches",
		},
	}

	for _, test := range tests {
		m2p, err := predicates.MapPodsToMachines(algorithm.FakePodLister(test.pods))
		if err != nil {
			t.Errorf("unexpected error: %v", err)
		}
		selectorSpread := SelectorSpread{serviceLister: algorithm.FakeServiceLister(test.services), controllerLister: algorithm.FakeControllerLister(test.rcs)}
		list, err := selectorSpread.CalculateSpreadPriority(test.pod, m2p, algorithm.FakePodLister(test.pods), algorithm.FakeNodeLister(makeNodeList(test.nodes)))
		if err != nil {
			t.Errorf("unexpected error: %v", err)
		}
		if !reflect.DeepEqual(test.expectedList, list) {
			t.Errorf("%s: expected %#v, got %#v", test.test, test.expectedList, list)
		}
	}
}

//.........这里部分代码省略.........
				buildPod(nodeMachine1Zone1, labels2),
				buildPod(nodeMachine1Zone2, labels1),
				buildPod(nodeMachine2Zone2, labels1),
				buildPod(nodeMachine1Zone3, labels2),
				buildPod(nodeMachine2Zone3, labels1),
			},
			services: []api.Service{{Spec: api.ServiceSpec{Selector: labels1}}},
			expectedList: []schedulerapi.HostPriority{
				{nodeMachine1Zone1, 10},
				{nodeMachine1Zone2, 0}, // Pod on node
				{nodeMachine2Zone2, 0}, // Pod on node
				{nodeMachine1Zone3, 6}, // Pod in zone
				{nodeMachine2Zone3, 3}, // Pod on node
				{nodeMachine3Zone3, 6}, // Pod in zone
			},
			test: "five pods, 3 matching (z2=2, z3=1)",
		},
		{
			pod: buildPod("", labels1),
			pods: []*api.Pod{
				buildPod(nodeMachine1Zone1, labels1),
				buildPod(nodeMachine1Zone2, labels1),
				buildPod(nodeMachine2Zone2, labels2),
				buildPod(nodeMachine1Zone3, labels1),
			},
			services: []api.Service{{Spec: api.ServiceSpec{Selector: labels1}}},
			expectedList: []schedulerapi.HostPriority{
				{nodeMachine1Zone1, 0}, // Pod on node
				{nodeMachine1Zone2, 0}, // Pod on node
				{nodeMachine2Zone2, 3}, // Pod in zone
				{nodeMachine1Zone3, 0}, // Pod on node
				{nodeMachine2Zone3, 3}, // Pod in zone
				{nodeMachine3Zone3, 3}, // Pod in zone
			},
			test: "four pods, 3 matching (z1=1, z2=1, z3=1)",
		},
		{
			pod: buildPod("", labels1),
			pods: []*api.Pod{
				buildPod(nodeMachine1Zone1, labels1),
				buildPod(nodeMachine1Zone2, labels1),
				buildPod(nodeMachine1Zone3, labels1),
				buildPod(nodeMachine2Zone2, labels2),
			},
			services: []api.Service{{Spec: api.ServiceSpec{Selector: labels1}}},
			expectedList: []schedulerapi.HostPriority{
				{nodeMachine1Zone1, 0}, // Pod on node
				{nodeMachine1Zone2, 0}, // Pod on node
				{nodeMachine2Zone2, 3}, // Pod in zone
				{nodeMachine1Zone3, 0}, // Pod on node
				{nodeMachine2Zone3, 3}, // Pod in zone
				{nodeMachine3Zone3, 3}, // Pod in zone
			},
			test: "four pods, 3 matching (z1=1, z2=1, z3=1)",
		},
		{
			pod: buildPod("", labels1),
			pods: []*api.Pod{
				buildPod(nodeMachine1Zone3, labels1),
				buildPod(nodeMachine1Zone2, labels1),
				buildPod(nodeMachine1Zone3, labels1),
			},
			rcs: []api.ReplicationController{{Spec: api.ReplicationControllerSpec{Selector: labels1}}},
			expectedList: []schedulerapi.HostPriority{
				// Note that because we put two pods on the same node (nodeMachine1Zone3),
				// the values here are questionable for zone2, in particular for nodeMachine1Zone2.
				// However they kind of make sense; zone1 is still most-highly favored.
				// zone3 is in general least favored, and m1.z3 particularly low priority.
				// We would probably prefer to see a bigger gap between putting a second
				// pod on m1.z2 and putting a pod on m2.z2, but the ordering is correct.
				// This is also consistent with what we have already.
				{nodeMachine1Zone1, 10}, // No pods in zone
				{nodeMachine1Zone2, 5},  // Pod on node
				{nodeMachine2Zone2, 6},  // Pod in zone
				{nodeMachine1Zone3, 0},  // Two pods on node
				{nodeMachine2Zone3, 3},  // Pod in zone
				{nodeMachine3Zone3, 3},  // Pod in zone
			},
			test: "Replication controller spreading (z1=0, z2=1, z3=2)",
		},
	}

	for _, test := range tests {
		selectorSpread := SelectorSpread{serviceLister: algorithm.FakeServiceLister(test.services), controllerLister: algorithm.FakeControllerLister(test.rcs)}
		m2p, err := predicates.MapPodsToMachines(algorithm.FakePodLister(test.pods))
		if err != nil {
			t.Errorf("unexpected error: %v", err)
		}
		list, err := selectorSpread.CalculateSpreadPriority(test.pod, m2p, algorithm.FakePodLister(test.pods), algorithm.FakeNodeLister(makeLabeledNodeList(labeledNodes)))
		if err != nil {
			t.Errorf("unexpected error: %v", err)
		}
		// sort the two lists to avoid failures on account of different ordering
		sort.Sort(test.expectedList)
		sort.Sort(list)
		if !reflect.DeepEqual(test.expectedList, list) {
			t.Errorf("%s: expected %#v, got %#v", test.test, test.expectedList, list)
		}
	}
}