Create PredicateFailureReason, modify scheduler predicate interface.

plugin/pkg/scheduler/algorithm/predicates/error.go

@@ -16,13 +16,9 @@ limitations under the License.
 
 package predicates
 
-import "fmt"
-
-const (
-	podCountResourceName  string = "PodCount"
-	cpuResourceName       string = "CPU"
-	memoryResourceName    string = "Memory"
-	nvidiaGpuResourceName string = "NvidiaGpu"
+import (
+	"fmt"
+	"k8s.io/kubernetes/pkg/api"
 )
 
 var (
@@ -49,13 +45,13 @@ var (
 // hit and caused the unfitting failure.
 type InsufficientResourceError struct {
 	// resourceName is the name of the resource that is insufficient
-	ResourceName string
+	ResourceName api.ResourceName
 	requested    int64
 	used         int64
 	capacity     int64
 }
 
-func newInsufficientResourceError(resourceName string, requested, used, capacity int64) *InsufficientResourceError {
+func NewInsufficientResourceError(resourceName api.ResourceName, requested, used, capacity int64) *InsufficientResourceError {
 	return &InsufficientResourceError{
 		ResourceName: resourceName,
 		requested:    requested,
@@ -69,14 +65,34 @@ func (e *InsufficientResourceError) Error() string {
 		e.ResourceName, e.requested, e.used, e.capacity)
 }
 
+func (e *InsufficientResourceError) GetReason() string {
+	return fmt.Sprintf("Insufficient %v", e.ResourceName)
+}
+
 type PredicateFailureError struct {
 	PredicateName string
 }
 
 func newPredicateFailureError(predicateName string) *PredicateFailureError {
-	return &PredicateFailureError{predicateName}
+	return &PredicateFailureError{PredicateName: predicateName}
 }
 
 func (e *PredicateFailureError) Error() string {
 	return fmt.Sprintf("Predicate %s failed", e.PredicateName)
 }
+
+func (e *PredicateFailureError) GetReason() string {
+	return e.PredicateName
+}
+
+type FailureReason struct {
+	reason string
+}
+
+func NewFailureReason(msg string) *FailureReason {
+	return &FailureReason{reason: msg}
+}
+
+func (e *FailureReason) GetReason() string {
+	return e.reason
+}