Golang labels.Everything函数代码示例

// GetDeploymentsForReplicaSet returns a list of deployments managing a replica set. Returns an error only if no matching deployments are found.
func (s *StoreToDeploymentLister) GetDeploymentsForReplicaSet(rs *extensions.ReplicaSet) (deployments []*extensions.Deployment, err error) {
	if len(rs.Labels) == 0 {
		err = fmt.Errorf("no deployments found for ReplicaSet %v because it has no labels", rs.Name)
		return
	}

	// TODO: MODIFY THIS METHOD so that it checks for the podTemplateSpecHash label
	dList, err := s.Deployments(rs.Namespace).List(labels.Everything())
	if err != nil {
		return
	}
	for _, d := range dList {
		selector, err := metav1.LabelSelectorAsSelector(d.Spec.Selector)
		if err != nil {
			return nil, fmt.Errorf("invalid label selector: %v", err)
		}
		// If a deployment with a nil or empty selector creeps in, it should match nothing, not everything.
		if selector.Empty() || !selector.Matches(labels.Set(rs.Labels)) {
			continue
		}
		deployments = append(deployments, d)
	}
	if len(deployments) == 0 {
		err = fmt.Errorf("could not find deployments set for ReplicaSet %s in namespace %s with labels: %v", rs.Name, rs.Namespace, rs.Labels)
	}
	return
}

// GetPodReplicaSets returns a list of ReplicaSets managing a pod. Returns an error only if no matching ReplicaSets are found.
func (s *StoreToReplicaSetLister) GetPodReplicaSets(pod *v1.Pod) (rss []*extensions.ReplicaSet, err error) {
	if len(pod.Labels) == 0 {
		err = fmt.Errorf("no ReplicaSets found for pod %v because it has no labels", pod.Name)
		return
	}

	list, err := s.ReplicaSets(pod.Namespace).List(labels.Everything())
	if err != nil {
		return
	}
	for _, rs := range list {
		if rs.Namespace != pod.Namespace {
			continue
		}
		selector, err := metav1.LabelSelectorAsSelector(rs.Spec.Selector)
		if err != nil {
			return nil, fmt.Errorf("invalid selector: %v", err)
		}

		// If a ReplicaSet with a nil or empty selector creeps in, it should match nothing, not everything.
		if selector.Empty() || !selector.Matches(labels.Set(pod.Labels)) {
			continue
		}
		rss = append(rss, rs)
	}
	if len(rss) == 0 {
		err = fmt.Errorf("could not find ReplicaSet for pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
	}
	return
}

// GetDeploymentsForDeployments returns a list of deployments managing a pod. Returns an error only if no matching deployments are found.
// TODO eliminate shallow copies
func (s *StoreToDeploymentLister) GetDeploymentsForPod(pod *v1.Pod) (deployments []*extensions.Deployment, err error) {
	if len(pod.Labels) == 0 {
		err = fmt.Errorf("no deployments found for Pod %v because it has no labels", pod.Name)
		return
	}

	if len(pod.Labels[extensions.DefaultDeploymentUniqueLabelKey]) == 0 {
		return
	}

	dList, err := s.Deployments(pod.Namespace).List(labels.Everything())
	if err != nil {
		return
	}
	for _, d := range dList {
		selector, err := metav1.LabelSelectorAsSelector(d.Spec.Selector)
		if err != nil {
			return nil, fmt.Errorf("invalid label selector: %v", err)
		}
		// If a deployment with a nil or empty selector creeps in, it should match nothing, not everything.
		if selector.Empty() || !selector.Matches(labels.Set(pod.Labels)) {
			continue
		}
		deployments = append(deployments, d)
	}
	if len(deployments) == 0 {
		err = fmt.Errorf("could not find deployments set for Pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
	}
	return
}

func ExtractFromListOptions(opts interface{}) (labelSelector labels.Selector, fieldSelector fields.Selector, resourceVersion string) {
	var err error
	switch t := opts.(type) {
	case api.ListOptions:
		labelSelector = t.LabelSelector
		fieldSelector = t.FieldSelector
		resourceVersion = t.ResourceVersion
	case v1.ListOptions:
		labelSelector, err = labels.Parse(t.LabelSelector)
		if err != nil {
			panic(err)
		}
		fieldSelector, err = fields.ParseSelector(t.FieldSelector)
		if err != nil {
			panic(err)
		}
		resourceVersion = t.ResourceVersion
	default:
		panic(fmt.Errorf("expect a ListOptions"))
	}
	if labelSelector == nil {
		labelSelector = labels.Everything()
	}
	if fieldSelector == nil {
		fieldSelector = fields.Everything()
	}
	return labelSelector, fieldSelector, resourceVersion
}

func addDefaultingFuncs(scheme *runtime.Scheme) error {
	return scheme.AddDefaultingFuncs(
		func(obj *ListOptions) {
			if obj.LabelSelector == nil {
				obj.LabelSelector = labels.Everything()
			}
			if obj.FieldSelector == nil {
				obj.FieldSelector = fields.Everything()
			}
		},
	)
}

func (c *FakeCertificateSigningRequests) List(opts v1.ListOptions) (result *v1alpha1.CertificateSigningRequestList, err error) {
	obj, err := c.Fake.
		Invokes(testing.NewRootListAction(certificatesigningrequestsResource, opts), &v1alpha1.CertificateSigningRequestList{})
	if obj == nil {
		return nil, err
	}

	label, _, _ := testing.ExtractFromListOptions(opts)
	if label == nil {
		label = labels.Everything()
	}
	list := &v1alpha1.CertificateSigningRequestList{}
	for _, item := range obj.(*v1alpha1.CertificateSigningRequestList).Items {
		if label.Matches(labels.Set(item.Labels)) {
			list.Items = append(list.Items, item)
		}
	}
	return list, err
}

func (c *FakePodSecurityPolicies) List(opts v1.ListOptions) (result *v1beta1.PodSecurityPolicyList, err error) {
	obj, err := c.Fake.
		Invokes(testing.NewRootListAction(podsecuritypoliciesResource, opts), &v1beta1.PodSecurityPolicyList{})
	if obj == nil {
		return nil, err
	}

	label, _, _ := testing.ExtractFromListOptions(opts)
	if label == nil {
		label = labels.Everything()
	}
	list := &v1beta1.PodSecurityPolicyList{}
	for _, item := range obj.(*v1beta1.PodSecurityPolicyList).Items {
		if label.Matches(labels.Set(item.Labels)) {
			list.Items = append(list.Items, item)
		}
	}
	return list, err
}

func (c *FakeServices) List(opts v1.ListOptions) (result *v1.ServiceList, err error) {
	obj, err := c.Fake.
		Invokes(testing.NewListAction(servicesResource, c.ns, opts), &v1.ServiceList{})

	if obj == nil {
		return nil, err
	}

	label, _, _ := testing.ExtractFromListOptions(opts)
	if label == nil {
		label = labels.Everything()
	}
	list := &v1.ServiceList{}
	for _, item := range obj.(*v1.ServiceList).Items {
		if label.Matches(labels.Set(item.Labels)) {
			list.Items = append(list.Items, item)
		}
	}
	return list, err
}

// TODO: Move this back to scheduler as a helper function that takes a Store,
// rather than a method of StoreToServiceLister.
func (s *StoreToServiceLister) GetPodServices(pod *v1.Pod) (services []*v1.Service, err error) {
	allServices, err := s.Services(pod.Namespace).List(labels.Everything())
	if err != nil {
		return nil, err
	}

	for i := range allServices {
		service := allServices[i]
		if service.Spec.Selector == nil {
			// services with nil selectors match nothing, not everything.
			continue
		}
		selector := labels.Set(service.Spec.Selector).AsSelectorPreValidated()
		if selector.Matches(labels.Set(pod.Labels)) {
			services = append(services, service)
		}
	}

	return services, nil
}

// LabelSelectorAsSelector converts the LabelSelector api type into a struct that implements
// labels.Selector
// Note: This function should be kept in sync with the selector methods in pkg/labels/selector.go
func LabelSelectorAsSelector(ps *LabelSelector) (labels.Selector, error) {
	if ps == nil {
		return labels.Nothing(), nil
	}
	if len(ps.MatchLabels)+len(ps.MatchExpressions) == 0 {
		return labels.Everything(), nil
	}
	selector := labels.NewSelector()
	for k, v := range ps.MatchLabels {
		r, err := labels.NewRequirement(k, selection.Equals, []string{v})
		if err != nil {
			return nil, err
		}
		selector = selector.Add(*r)
	}
	for _, expr := range ps.MatchExpressions {
		var op selection.Operator
		switch expr.Operator {
		case LabelSelectorOpIn:
			op = selection.In
		case LabelSelectorOpNotIn:
			op = selection.NotIn
		case LabelSelectorOpExists:
			op = selection.Exists
		case LabelSelectorOpDoesNotExist:
			op = selection.DoesNotExist
		default:
			return nil, fmt.Errorf("%q is not a valid pod selector operator", expr.Operator)
		}
		r, err := labels.NewRequirement(expr.Key, op, append([]string(nil), expr.Values...))
		if err != nil {
			return nil, err
		}
		selector = selector.Add(*r)
	}
	return selector, nil
}

func TestStoreToReplicaSetLister(t *testing.T) {
	store := NewIndexer(MetaNamespaceKeyFunc, Indexers{NamespaceIndex: MetaNamespaceIndexFunc})
	lister := StoreToReplicaSetLister{store}
	testCases := []struct {
		inRSs      []*extensions.ReplicaSet
		list       func() ([]*extensions.ReplicaSet, error)
		outRSNames sets.String
		expectErr  bool
	}{
		// Basic listing with all labels and no selectors
		{
			inRSs: []*extensions.ReplicaSet{
				{ObjectMeta: v1.ObjectMeta{Name: "basic"}},
			},
			list: func() ([]*extensions.ReplicaSet, error) {
				return lister.List(labels.Everything())
			},
			outRSNames: sets.NewString("basic"),
		},
		// No pod labels
		{
			inRSs: []*extensions.ReplicaSet{
				{
					ObjectMeta: v1.ObjectMeta{Name: "basic", Namespace: "ns"},
					Spec: extensions.ReplicaSetSpec{
						Selector: &metav1.LabelSelector{MatchLabels: map[string]string{"foo": "baz"}},
					},
				},
			},
			list: func() ([]*extensions.ReplicaSet, error) {
				pod := &v1.Pod{
					ObjectMeta: v1.ObjectMeta{Name: "pod1", Namespace: "ns"},
				}
				return lister.GetPodReplicaSets(pod)
			},
			outRSNames: sets.NewString(),
			expectErr:  true,
		},
		// No ReplicaSet selectors
		{
			inRSs: []*extensions.ReplicaSet{
				{
					ObjectMeta: v1.ObjectMeta{Name: "basic", Namespace: "ns"},
				},
			},
			list: func() ([]*extensions.ReplicaSet, error) {
				pod := &v1.Pod{
					ObjectMeta: v1.ObjectMeta{
						Name:      "pod1",
						Namespace: "ns",
						Labels:    map[string]string{"foo": "bar"},
					},
				}
				return lister.GetPodReplicaSets(pod)
			},
			outRSNames: sets.NewString(),
			expectErr:  true,
		},
		// Matching labels to selectors and namespace
		{
			inRSs: []*extensions.ReplicaSet{
				{
					ObjectMeta: v1.ObjectMeta{Name: "foo"},
					Spec: extensions.ReplicaSetSpec{
						Selector: &metav1.LabelSelector{MatchLabels: map[string]string{"foo": "bar"}},
					},
				},
				{
					ObjectMeta: v1.ObjectMeta{Name: "bar", Namespace: "ns"},
					Spec: extensions.ReplicaSetSpec{
						Selector: &metav1.LabelSelector{MatchLabels: map[string]string{"foo": "bar"}},
					},
				},
			},
			list: func() ([]*extensions.ReplicaSet, error) {
				pod := &v1.Pod{
					ObjectMeta: v1.ObjectMeta{
						Name:      "pod1",
						Labels:    map[string]string{"foo": "bar"},
						Namespace: "ns",
					},
				}
				return lister.GetPodReplicaSets(pod)
			},
			outRSNames: sets.NewString("bar"),
		},
	}
	for _, c := range testCases {
		for _, r := range c.inRSs {
			store.Add(r)
		}

		gotRSs, err := c.list()
		if err != nil && c.expectErr {
			continue
		} else if c.expectErr {
			t.Error("Expected error, got none")
			continue
		} else if err != nil {
			t.Errorf("Unexpected error %#v", err)
//.........这里部分代码省略.........

func TestStoreToReplicationControllerLister(t *testing.T) {
	testCases := []struct {
		description              string
		inRCs                    []*v1.ReplicationController
		list                     func(StoreToReplicationControllerLister) ([]*v1.ReplicationController, error)
		outRCNames               sets.String
		expectErr                bool
		onlyIfIndexedByNamespace bool
	}{
		{
			description: "Verify we can search all namespaces",
			inRCs: []*v1.ReplicationController{
				{
					ObjectMeta: v1.ObjectMeta{Name: "foo", Namespace: "bar"},
				},
				{
					ObjectMeta: v1.ObjectMeta{Name: "hmm", Namespace: "hmm"},
				},
			},
			list: func(lister StoreToReplicationControllerLister) ([]*v1.ReplicationController, error) {
				return lister.ReplicationControllers(v1.NamespaceAll).List(labels.Set{}.AsSelectorPreValidated())
			},
			outRCNames: sets.NewString("hmm", "foo"),
		},
		{
			description: "Verify we can search a specific namespace",
			inRCs: []*v1.ReplicationController{
				{
					ObjectMeta: v1.ObjectMeta{Name: "foo", Namespace: "bar"},
				},
				{
					ObjectMeta: v1.ObjectMeta{Name: "hmm", Namespace: "hmm"},
				},
			},
			list: func(lister StoreToReplicationControllerLister) ([]*v1.ReplicationController, error) {
				return lister.ReplicationControllers("hmm").List(labels.Set{}.AsSelectorPreValidated())
			},
			outRCNames: sets.NewString("hmm"),
		},
		{
			description: "Basic listing with all labels and no selectors",
			inRCs: []*v1.ReplicationController{
				{ObjectMeta: v1.ObjectMeta{Name: "basic"}},
			},
			list: func(lister StoreToReplicationControllerLister) ([]*v1.ReplicationController, error) {
				return lister.List(labels.Everything())
			},
			outRCNames: sets.NewString("basic"),
		},
		{
			description: "No pod labels",
			inRCs: []*v1.ReplicationController{
				{
					ObjectMeta: v1.ObjectMeta{Name: "basic", Namespace: "ns"},
					Spec: v1.ReplicationControllerSpec{
						Selector: map[string]string{"foo": "baz"},
					},
				},
			},
			list: func(lister StoreToReplicationControllerLister) ([]*v1.ReplicationController, error) {
				pod := &v1.Pod{
					ObjectMeta: v1.ObjectMeta{Name: "pod1", Namespace: "ns"},
				}
				return lister.GetPodControllers(pod)
			},
			outRCNames: sets.NewString(),
			expectErr:  true,
		},
		{
			description: "No RC selectors",
			inRCs: []*v1.ReplicationController{
				{
					ObjectMeta: v1.ObjectMeta{Name: "basic", Namespace: "ns"},
				},
			},
			list: func(lister StoreToReplicationControllerLister) ([]*v1.ReplicationController, error) {
				pod := &v1.Pod{
					ObjectMeta: v1.ObjectMeta{
						Name:      "pod1",
						Namespace: "ns",
						Labels:    map[string]string{"foo": "bar"},
					},
				}
				return lister.GetPodControllers(pod)
			},
			outRCNames: sets.NewString(),
			expectErr:  true,
		},
		{
			description: "Matching labels to selectors and namespace",
			inRCs: []*v1.ReplicationController{
				{
					ObjectMeta: v1.ObjectMeta{Name: "foo"},
					Spec: v1.ReplicationControllerSpec{
						Selector: map[string]string{"foo": "bar"},
					},
				},
				{
					ObjectMeta: v1.ObjectMeta{Name: "bar", Namespace: "ns"},
					Spec: v1.ReplicationControllerSpec{
//.........这里部分代码省略.........

func (s roleBindingLister) ListRoleBindings(namespace string) ([]*rbac.RoleBinding, error) {
	return s.RoleBindings(namespace).List(labels.Everything())
}

func (s clusterRoleBindingLister) ListClusterRoleBindings() ([]*rbac.ClusterRoleBinding, error) {
	return s.List(labels.Everything())
}