// Populates data struct with a volume
// Calls AddPodToVolume() twice to add the same pod to the volume
// Verifies volume/pod combo exist using PodExistsInVolume() and the second call
// did not fail.
func Test_AddPodToVolume_Positive_ExistingVolumeExistingNode(t *testing.T) {
// Arrange
volumePluginMgr, plugin := volumetesting.GetTestVolumePluginMgr(t)
asw := NewActualStateOfWorld("mynode" /* nodeName */, volumePluginMgr)
devicePath := "fake/device/path"
pod := &api.Pod{
ObjectMeta: api.ObjectMeta{
Name: "pod1",
UID: "pod1uid",
},
Spec: api.PodSpec{
Volumes: []api.Volume{
{
Name: "volume-name",
VolumeSource: api.VolumeSource{
GCEPersistentDisk: &api.GCEPersistentDiskVolumeSource{
PDName: "fake-device1",
},
},
},
},
},
}
volumeSpec := &volume.Spec{Volume: &pod.Spec.Volumes[0]}
volumeName, err := volumehelper.GetUniqueVolumeNameFromSpec(
plugin, volumeSpec)
generatedVolumeName, err := asw.AddVolume(volumeSpec, devicePath)
if err != nil {
t.Fatalf("AddVolume failed. Expected: <no error> Actual: <%v>", err)
}
podName := volumehelper.GetUniquePodName(pod)
mounter, err := plugin.NewMounter(volumeSpec, pod, volume.VolumeOptions{})
if err != nil {
t.Fatalf("NewUnmounter failed. Expected: <no error> Actual: <%v>", err)
}
err = asw.AddPodToVolume(
podName, pod.UID, volumeName, mounter, volumeSpec.Name(), "" /* volumeGidValue */)
if err != nil {
t.Fatalf("AddPodToVolume failed. Expected: <no error> Actual: <%v>", err)
}
// Act
err = asw.AddPodToVolume(
podName, pod.UID, volumeName, mounter, volumeSpec.Name(), "" /* volumeGidValue */)
// Assert
if err != nil {
t.Fatalf("AddPodToVolume failed. Expected: <no error> Actual: <%v>", err)
}
verifyVolumeExistsAsw(t, generatedVolumeName, true /* shouldExist */, asw)
verifyVolumeDoesntExistInUnmountedVolumes(t, generatedVolumeName, asw)
verifyVolumeDoesntExistInGloballyMountedVolumes(t, generatedVolumeName, asw)
verifyPodExistsInVolumeAsw(t, podName, generatedVolumeName, "fake/device/path" /* expectedDevicePath */, asw)
}
func (dsw *desiredStateOfWorld) AddPodToVolume(
podName types.UniquePodName,
pod *api.Pod,
volumeSpec *volume.Spec,
outerVolumeSpecName string,
volumeGidValue string) (api.UniqueVolumeName, error) {
dsw.Lock()
defer dsw.Unlock()
volumePlugin, err := dsw.volumePluginMgr.FindPluginBySpec(volumeSpec)
if err != nil || volumePlugin == nil {
return "", fmt.Errorf(
"failed to get Plugin from volumeSpec for volume %q err=%v",
volumeSpec.Name(),
err)
}
volumeName, err :=
volumehelper.GetUniqueVolumeNameFromSpec(volumePlugin, volumeSpec)
if err != nil {
return "", fmt.Errorf(
"failed to GetUniqueVolumeNameFromSpec for volumeSpec %q using volume plugin %q err=%v",
volumeSpec.Name(),
volumePlugin.GetPluginName(),
err)
}
volumeObj, volumeExists := dsw.volumesToMount[volumeName]
if !volumeExists {
volumeObj = volumeToMount{
volumeName: volumeName,
podsToMount: make(map[types.UniquePodName]podToMount),
pluginIsAttachable: dsw.isAttachableVolume(volumeSpec),
volumeGidValue: volumeGidValue,
reportedInUse: false,
}
dsw.volumesToMount[volumeName] = volumeObj
}
// Create new podToMount object. If it already exists, it is refreshed with
// updated values (this is required for volumes that require remounting on
// pod update, like Downward API volumes).
dsw.volumesToMount[volumeName].podsToMount[podName] = podToMount{
podName: podName,
pod: pod,
spec: volumeSpec,
outerVolumeSpecName: outerVolumeSpecName,
}
return volumeName, nil
}
// Calls AddPodToVolume() to add pod to empty data stuct
// Verifies call fails with "volume does not exist" error.
func Test_AddPodToVolume_Negative_VolumeDoesntExist(t *testing.T) {
// Arrange
volumePluginMgr, _ := volumetesting.GetTestVolumePluginMgr(t)
asw := NewActualStateOfWorld("mynode" /* nodeName */, volumePluginMgr)
pod := &api.Pod{
ObjectMeta: api.ObjectMeta{
Name: "pod1",
UID: "pod1uid",
},
Spec: api.PodSpec{
Volumes: []api.Volume{
{
Name: "volume-name",
VolumeSource: api.VolumeSource{
GCEPersistentDisk: &api.GCEPersistentDiskVolumeSource{
PDName: "fake-device1",
},
},
},
},
},
}
volumeSpec := &volume.Spec{Volume: &pod.Spec.Volumes[0]}
plugin, err := volumePluginMgr.FindPluginBySpec(volumeSpec)
if err != nil {
t.Fatalf(
"volumePluginMgr.FindPluginBySpec failed to find volume plugin for %#v with: %v",
volumeSpec,
err)
}
volumeName, err := volumehelper.GetUniqueVolumeNameFromSpec(
plugin, volumeSpec)
podName := volumehelper.GetUniquePodName(pod)
mounter, err := plugin.NewMounter(volumeSpec, pod, volume.VolumeOptions{})
if err != nil {
t.Fatalf("NewUnmounter failed. Expected: <no error> Actual: <%v>", err)
}
// Act
err = asw.AddPodToVolume(
podName, pod.UID, volumeName, mounter, volumeSpec.Name(), "" /* volumeGidValue */)
// Assert
if err == nil {
t.Fatalf("AddPodToVolume did not fail. Expected: <\"no volume with the name ... exists in the list of attached volumes\"> Actual: <no error>")
}
verifyVolumeExistsAsw(t, volumeName, false /* shouldExist */, asw)
verifyVolumeDoesntExistInUnmountedVolumes(t, volumeName, asw)
verifyVolumeDoesntExistInGloballyMountedVolumes(t, volumeName, asw)
verifyPodDoesntExistInVolumeAsw(
t,
podName,
volumeName,
false, /* expectVolumeToExist */
asw)
}
// processPodVolumes processes the volumes in the given pod and adds them to the
// desired state of the world if addVolumes is true, otherwise it removes them.
func (adc *attachDetachController) processPodVolumes(
pod *api.Pod, addVolumes bool) {
if pod == nil {
return
}
if len(pod.Spec.Volumes) <= 0 {
return
}
if !adc.desiredStateOfWorld.NodeExists(pod.Spec.NodeName) {
// If the node the pod is scheduled to does not exist in the desired
// state of the world data structure, that indicates the node is not
// yet managed by the controller. Therefore, ignore the pod.
// If the node is added to the list of managed nodes in the future,
// future adds and updates to the pod will be processed.
glog.V(10).Infof(
"Skipping processing of pod %q/%q: it is scheduled to node %q which is not managed by the controller.",
pod.Namespace,
pod.Name,
pod.Spec.NodeName)
return
}
// Process volume spec for each volume defined in pod
for _, podVolume := range pod.Spec.Volumes {
volumeSpec, err := adc.createVolumeSpec(podVolume, pod.Namespace)
if err != nil {
glog.V(10).Infof(
"Error processing volume %q for pod %q/%q: %v",
podVolume.Name,
pod.Namespace,
pod.Name,
err)
continue
}
attachableVolumePlugin, err :=
adc.volumePluginMgr.FindAttachablePluginBySpec(volumeSpec)
if err != nil || attachableVolumePlugin == nil {
glog.V(10).Infof(
"Skipping volume %q for pod %q/%q: it does not implement attacher interface. err=%v",
podVolume.Name,
pod.Namespace,
pod.Name,
err)
continue
}
uniquePodName := volumehelper.GetUniquePodName(pod)
if addVolumes {
// Add volume to desired state of world
_, err := adc.desiredStateOfWorld.AddPod(
uniquePodName, pod, volumeSpec, pod.Spec.NodeName)
if err != nil {
glog.V(10).Infof(
"Failed to add volume %q for pod %q/%q to desiredStateOfWorld. %v",
podVolume.Name,
pod.Namespace,
pod.Name,
err)
}
} else {
// Remove volume from desired state of world
uniqueVolumeName, err := volumehelper.GetUniqueVolumeNameFromSpec(
attachableVolumePlugin, volumeSpec)
if err != nil {
glog.V(10).Infof(
"Failed to delete volume %q for pod %q/%q from desiredStateOfWorld. GetUniqueVolumeNameFromSpec failed with %v",
podVolume.Name,
pod.Namespace,
pod.Name,
err)
continue
}
adc.desiredStateOfWorld.DeletePod(
uniquePodName, uniqueVolumeName, pod.Spec.NodeName)
}
}
return
}