metrics_test.go

Documentation: k8s.io/kubernetes/pkg/kubelet/volumemanager/metrics

     1  /*
     2  Copyright 2018 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 metrics
    18  
    19  import (
    20  	"k8s.io/klog/v2/ktesting"
    21  	"testing"
    22  
    23  	v1 "k8s.io/api/core/v1"
    24  	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    25  	k8stypes "k8s.io/apimachinery/pkg/types"
    26  	"k8s.io/kubernetes/pkg/kubelet/volumemanager/cache"
    27  	"k8s.io/kubernetes/pkg/volume"
    28  
    29  	volumetesting "k8s.io/kubernetes/pkg/volume/testing"
    30  	"k8s.io/kubernetes/pkg/volume/util"
    31  	"k8s.io/kubernetes/pkg/volume/util/operationexecutor"
    32  )
    33  
    34  func TestMetricCollection(t *testing.T) {
    35  	volumePluginMgr, fakePlugin := volumetesting.GetTestKubeletVolumePluginMgr(t)
    36  	seLinuxTranslator := util.NewFakeSELinuxLabelTranslator()
    37  	dsw := cache.NewDesiredStateOfWorld(volumePluginMgr, seLinuxTranslator)
    38  	asw := cache.NewActualStateOfWorld(k8stypes.NodeName("node-name"), volumePluginMgr)
    39  	pod := &v1.Pod{
    40  		ObjectMeta: metav1.ObjectMeta{
    41  			Name: "pod1",
    42  			UID:  "pod1uid",
    43  		},
    44  		Spec: v1.PodSpec{
    45  			Volumes: []v1.Volume{
    46  				{
    47  					Name: "volume-name",
    48  					VolumeSource: v1.VolumeSource{
    49  						GCEPersistentDisk: &v1.GCEPersistentDiskVolumeSource{
    50  							PDName: "fake-device1",
    51  						},
    52  					},
    53  				},
    54  			},
    55  		},
    56  	}
    57  	volumeSpec := &volume.Spec{Volume: &pod.Spec.Volumes[0]}
    58  	podName := util.GetUniquePodName(pod)
    59  
    60  	// Add one volume to DesiredStateOfWorld
    61  	generatedVolumeName, err := dsw.AddPodToVolume(podName, pod, volumeSpec, volumeSpec.Name(), "", nil /* seLinuxOptions */)
    62  	if err != nil {
    63  		t.Fatalf("AddPodToVolume failed. Expected: <no error> Actual: <%v>", err)
    64  	}
    65  
    66  	mounter, err := fakePlugin.NewMounter(volumeSpec, pod, volume.VolumeOptions{})
    67  	if err != nil {
    68  		t.Fatalf("NewMounter failed. Expected: <no error> Actual: <%v>", err)
    69  	}
    70  
    71  	mapper, err := fakePlugin.NewBlockVolumeMapper(volumeSpec, pod, volume.VolumeOptions{})
    72  	if err != nil {
    73  		t.Fatalf("NewBlockVolumeMapper failed. Expected: <no error> Actual: <%v>", err)
    74  	}
    75  
    76  	// Add one volume to ActualStateOfWorld
    77  	devicePath := "fake/device/path"
    78  	logger, _ := ktesting.NewTestContext(t)
    79  	err = asw.MarkVolumeAsAttached(logger, "", volumeSpec, "", devicePath)
    80  	if err != nil {
    81  		t.Fatalf("MarkVolumeAsAttached failed. Expected: <no error> Actual: <%v>", err)
    82  	}
    83  
    84  	markVolumeOpts := operationexecutor.MarkVolumeOpts{
    85  		PodName:             podName,
    86  		PodUID:              pod.UID,
    87  		VolumeName:          generatedVolumeName,
    88  		Mounter:             mounter,
    89  		BlockVolumeMapper:   mapper,
    90  		OuterVolumeSpecName: volumeSpec.Name(),
    91  		VolumeSpec:          volumeSpec,
    92  		VolumeMountState:    operationexecutor.VolumeMounted,
    93  	}
    94  	err = asw.AddPodToVolume(markVolumeOpts)
    95  	if err != nil {
    96  		t.Fatalf("AddPodToVolume failed. Expected: <no error> Actual: <%v>", err)
    97  	}
    98  
    99  	metricCollector := &totalVolumesCollector{asw: asw, dsw: dsw, pluginMgr: volumePluginMgr}
   100  
   101  	// Check if getVolumeCount returns correct data
   102  	count := metricCollector.getVolumeCount()
   103  	if len(count) != 2 {
   104  		t.Errorf("getVolumeCount failed. Expected <2> states, got <%d>", len(count))
   105  	}
   106  
   107  	dswCount, ok := count["desired_state_of_world"]
   108  	if !ok {
   109  		t.Errorf("getVolumeCount failed. Expected <desired_state_of_world>, got nothing")
   110  	}
   111  
   112  	fakePluginCount := dswCount["fake-plugin"]
   113  	if fakePluginCount != 1 {
   114  		t.Errorf("getVolumeCount failed. Expected <1> fake-plugin volume in DesiredStateOfWorld, got <%d>",
   115  			fakePluginCount)
   116  	}
   117  
   118  	aswCount, ok := count["actual_state_of_world"]
   119  	if !ok {
   120  		t.Errorf("getVolumeCount failed. Expected <actual_state_of_world>, got nothing")
   121  	}
   122  
   123  	fakePluginCount = aswCount["fake-plugin"]
   124  	if fakePluginCount != 1 {
   125  		t.Errorf("getVolumeCount failed. Expected <1> fake-plugin volume in ActualStateOfWorld, got <%d>",
   126  			fakePluginCount)
   127  	}
   128  }
   129
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