fake_binder.go

Documentation: k8s.io/kubernetes/pkg/scheduler/framework/plugins/volumebinding

     1  /*
     2  Copyright 2017 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package volumebinding
    18  
    19  import (
    20  	"context"
    21  
    22  	v1 "k8s.io/api/core/v1"
    23  	"k8s.io/apimachinery/pkg/util/sets"
    24  	"k8s.io/klog/v2"
    25  )
    26  
    27  // FakeVolumeBinderConfig holds configurations for fake volume binder.
    28  type FakeVolumeBinderConfig struct {
    29  	AllBound    bool
    30  	FindReasons ConflictReasons
    31  	FindErr     error
    32  	AssumeErr   error
    33  	BindErr     error
    34  }
    35  
    36  // NewFakeVolumeBinder sets up all the caches needed for the scheduler to make
    37  // topology-aware volume binding decisions.
    38  func NewFakeVolumeBinder(config *FakeVolumeBinderConfig) *FakeVolumeBinder {
    39  	return &FakeVolumeBinder{
    40  		config: config,
    41  	}
    42  }
    43  
    44  // FakeVolumeBinder represents a fake volume binder for testing.
    45  type FakeVolumeBinder struct {
    46  	config       *FakeVolumeBinderConfig
    47  	AssumeCalled bool
    48  	BindCalled   bool
    49  }
    50  
    51  var _ SchedulerVolumeBinder = &FakeVolumeBinder{}
    52  
    53  // GetPodVolumeClaims implements SchedulerVolumeBinder.GetPodVolumes.
    54  func (b *FakeVolumeBinder) GetPodVolumeClaims(_ klog.Logger, pod *v1.Pod) (podVolumeClaims *PodVolumeClaims, err error) {
    55  	return &PodVolumeClaims{}, nil
    56  }
    57  
    58  // GetEligibleNodes implements SchedulerVolumeBinder.GetEligibleNodes.
    59  func (b *FakeVolumeBinder) GetEligibleNodes(_ klog.Logger, boundClaims []*v1.PersistentVolumeClaim) (eligibleNodes sets.Set[string]) {
    60  	return nil
    61  }
    62  
    63  // FindPodVolumes implements SchedulerVolumeBinder.FindPodVolumes.
    64  func (b *FakeVolumeBinder) FindPodVolumes(_ klog.Logger, pod *v1.Pod, _ *PodVolumeClaims, node *v1.Node) (podVolumes *PodVolumes, reasons ConflictReasons, err error) {
    65  	return nil, b.config.FindReasons, b.config.FindErr
    66  }
    67  
    68  // AssumePodVolumes implements SchedulerVolumeBinder.AssumePodVolumes.
    69  func (b *FakeVolumeBinder) AssumePodVolumes(_ klog.Logger, assumedPod *v1.Pod, nodeName string, podVolumes *PodVolumes) (bool, error) {
    70  	b.AssumeCalled = true
    71  	return b.config.AllBound, b.config.AssumeErr
    72  }
    73  
    74  // RevertAssumedPodVolumes implements SchedulerVolumeBinder.RevertAssumedPodVolumes
    75  func (b *FakeVolumeBinder) RevertAssumedPodVolumes(_ *PodVolumes) {}
    76  
    77  // BindPodVolumes implements SchedulerVolumeBinder.BindPodVolumes.
    78  func (b *FakeVolumeBinder) BindPodVolumes(ctx context.Context, assumedPod *v1.Pod, podVolumes *PodVolumes) error {
    79  	b.BindCalled = true
    80  	return b.config.BindErr
    81  }
    82
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