// TestMetrics tests that MetricProvider methods return sane values.
func TestMetrics(t *testing.T) {
// Create an empty temp directory for the volume
tmpDir, err := ioutil.TempDir(os.TempDir(), "host_path_test")
if err != nil {
t.Fatalf("Can't make a tmp dir: %v", err)
}
defer os.RemoveAll(tmpDir)
plugMgr := volume.VolumePluginMgr{}
plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volumetest.NewFakeVolumeHost(tmpDir, nil, nil))
plug, err := plugMgr.FindPluginByName("kubernetes.io/host-path")
if err != nil {
t.Errorf("Can't find the plugin by name")
}
spec := &api.Volume{
Name: "vol1",
VolumeSource: api.VolumeSource{HostPath: &api.HostPathVolumeSource{Path: tmpDir}},
}
pod := &api.Pod{ObjectMeta: api.ObjectMeta{UID: types.UID("poduid")}}
builder, err := plug.NewBuilder(volume.NewSpecFromVolume(spec), pod, volume.VolumeOptions{})
if err != nil {
t.Errorf("Failed to make a new Builder: %v", err)
}
expectedEmptyDirUsage, err := volumetest.FindEmptyDirectoryUsageOnTmpfs()
if err != nil {
t.Errorf("Unexpected error finding expected empty directory usage on tmpfs: %v", err)
}
metrics, err := builder.GetMetrics()
if err != nil {
t.Errorf("Unexpected error when calling GetMetrics %v", err)
}
if e, a := expectedEmptyDirUsage.Value(), metrics.Used.Value(); e != a {
t.Errorf("Unexpected value for empty directory; expected %v, got %v", e, a)
}
if metrics.Capacity.Value() <= 0 {
t.Errorf("Expected Capacity to be greater than 0")
}
if metrics.Available.Value() <= 0 {
t.Errorf("Expected Available to be greater than 0")
}
}
// TestMetrics tests that MetricProvider methods return sane values.
func TestMetrics(t *testing.T) {
// Create an empty temp directory for the volume
tmpDir, err := utiltesting.MkTmpdir("empty_dir_test")
if err != nil {
t.Fatalf("Can't make a tmp dir: %v", err)
}
defer os.RemoveAll(tmpDir)
plug := makePluginUnderTest(t, "kubernetes.io/empty-dir", tmpDir)
spec := &api.Volume{
Name: "vol1",
}
pod := &api.Pod{ObjectMeta: api.ObjectMeta{UID: types.UID("poduid")}}
builder, err := plug.NewBuilder(volume.NewSpecFromVolume(spec), pod, volume.VolumeOptions{RootContext: ""})
if err != nil {
t.Errorf("Failed to make a new Builder: %v", err)
}
// Need to create the subdirectory
os.MkdirAll(builder.GetPath(), 0755)
expectedEmptyDirUsage, err := volumetest.FindEmptyDirectoryUsageOnTmpfs()
if err != nil {
t.Errorf("Unexpected error finding expected empty directory usage on tmpfs: %v", err)
}
// TODO(pwittroc): Move this into a reusable testing utility
metrics, err := builder.GetMetrics()
if err != nil {
t.Errorf("Unexpected error when calling GetMetrics %v", err)
}
if e, a := expectedEmptyDirUsage.Value(), metrics.Used.Value(); e != a {
t.Errorf("Unexpected value for empty directory; expected %v, got %v", e, a)
}
if metrics.Capacity.Value() <= 0 {
t.Errorf("Expected Capacity to be greater than 0")
}
if metrics.Available.Value() <= 0 {
t.Errorf("Expected Available to be greater than 0")
}
}
// TestMetricsDuGetCapacity tests that MetricsDu can read disk usage
// for path
func TestMetricsDuGetCapacity(t *testing.T) {
tmpDir, err := utiltesting.MkTmpdir("metrics_du_test")
if err != nil {
t.Fatalf("Can't make a tmp dir: %v", err)
}
defer os.RemoveAll(tmpDir)
metrics := NewMetricsDu(tmpDir)
expectedEmptyDirUsage, err := volumetest.FindEmptyDirectoryUsageOnTmpfs()
if err != nil {
t.Errorf("Unexpected error finding expected empty directory usage on tmpfs: %v", err)
}
actual, err := metrics.GetMetrics()
if err != nil {
t.Errorf("Unexpected error when calling GetMetrics %v", err)
}
if e, a := expectedEmptyDirUsage.Value(), actual.Used.Value(); e != a {
t.Errorf("Unexpected value for empty directory; expected %v, got %v", e, a)
}
// TODO(pwittroc): Figure out a way to test these values for correctness, maybe by formatting and mounting a file
// as a filesystem
if a := actual.Capacity.Value(); a <= 0 {
t.Errorf("Expected Capacity %d to be greater than 0.", a)
}
if a := actual.Available.Value(); a <= 0 {
t.Errorf("Expected Available %d to be greater than 0.", a)
}
// Write a file and expect Used to increase
ioutil.WriteFile(filepath.Join(tmpDir, "f1"), []byte("Hello World"), os.ModeTemporary)
actual, err = metrics.GetMetrics()
if err != nil {
t.Errorf("Unexpected error when calling GetMetrics %v", err)
}
if e, a := (expectedEmptyDirUsage.Value() + expectedBlockSize), actual.Used.Value(); e != a {
t.Errorf("Unexpected Used for directory with file. Expected %v, got %d.", e, a)
}
}