Volume scheduling library changes:

pkg/controller/volume/persistentvolume/scheduler_binder_cache.go

@@ -31,6 +31,8 @@ type PodBindingCache interface {
 	UpdateBindings(pod *v1.Pod, node string, bindings []*bindingInfo)
 
 	// GetBindings will return the cached bindings for the given pod and node.
+	// A nil return value means that the entry was not found. An empty slice
+	// means that no binding operations are needed.
 	GetBindings(pod *v1.Pod, node string) []*bindingInfo
 
 	// UpdateProvisionedPVCs will update the cache with the given provisioning decisions
@@ -38,6 +40,8 @@ type PodBindingCache interface {
 	UpdateProvisionedPVCs(pod *v1.Pod, node string, provisionings []*v1.PersistentVolumeClaim)
 
 	// GetProvisionedPVCs will return the cached provisioning decisions for the given pod and node.
+	// A nil return value means that the entry was not found. An empty slice
+	// means that no provisioning operations are needed.
 	GetProvisionedPVCs(pod *v1.Pod, node string) []*v1.PersistentVolumeClaim
 
 	// DeleteBindings will remove all cached bindings and provisionings for the given pod.

pkg/controller/volume/persistentvolume/scheduler_binder_fake.go

@@ -16,18 +16,15 @@ limitations under the License.
 
 package persistentvolume
 
-import (
-	"k8s.io/api/core/v1"
-)
+import "k8s.io/api/core/v1"
 
 type FakeVolumeBinderConfig struct {
-	AllBound              bool
-	FindUnboundSatsified  bool
-	FindBoundSatsified    bool
-	FindErr               error
-	AssumeBindingRequired bool
-	AssumeErr             error
-	BindErr               error
+	AllBound             bool
+	FindUnboundSatsified bool
+	FindBoundSatsified   bool
+	FindErr              error
+	AssumeErr            error
+	BindErr              error
 }
 
 // NewVolumeBinder sets up all the caches needed for the scheduler to make
@@ -48,9 +45,9 @@ func (b *FakeVolumeBinder) FindPodVolumes(pod *v1.Pod, node *v1.Node) (unboundVo
 	return b.config.FindUnboundSatsified, b.config.FindBoundSatsified, b.config.FindErr
 }
 
-func (b *FakeVolumeBinder) AssumePodVolumes(assumedPod *v1.Pod, nodeName string) (bool, bool, error) {
+func (b *FakeVolumeBinder) AssumePodVolumes(assumedPod *v1.Pod, nodeName string) (bool, error) {
 	b.AssumeCalled = true
-	return b.config.AllBound, b.config.AssumeBindingRequired, b.config.AssumeErr
+	return b.config.AllBound, b.config.AssumeErr
 }
 
 func (b *FakeVolumeBinder) BindPodVolumes(assumedPod *v1.Pod) error {