Remove FailedResourceType and return custom error

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

@@ -0,0 +1,40 @@
+/*
+Copyright 2016 The Kubernetes Authors All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package predicates
+
+import "fmt"
+
+var (
+	ErrExceededMaxPodNumber   = newInsufficientResourceError("PodCount")
+	ErrInsufficientFreeCPU    = newInsufficientResourceError("CPU")
+	ErrInsufficientFreeMemory = newInsufficientResourceError("Memory")
+)
+
+// InsufficientResourceError is an error type that indicates what kind of resource limit is
+// hit and caused the unfitting failure.
+type InsufficientResourceError struct {
+	// ResourceName tells the name of the resource that is insufficient
+	ResourceName string
+}
+
+func newInsufficientResourceError(resourceName string) *InsufficientResourceError {
+	return &InsufficientResourceError{resourceName}
+}
+
+func (e *InsufficientResourceError) Error() string {
+	return fmt.Sprintf("Node didn't have enough resource: %s", e.ResourceName)
+}