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CSI: allow drivers that can handle persistent and ephemeral volumes

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The conceptual change is that the mode in which a volume gets handled
is derived from it's spec, not from the ability of the driver. In
practice, that is already how the code worked because it didn't
actually look at CSIDriver.Spec.Mode at all.

Therefore the code change itself is mostly just renaming "driver mode"
to "volume mode". In some places (CanDeviceMount, CanAttach) the
feature check that was used elsewhere seemed to be missing. Now their
code path for ephemeral volumes are also only entered if that feature
is enabled.

The sanity check whether a CSI driver is being used correctly still
needs to be implemented.

Related-to: https://github.com/kubernetes/kubernetes/issues/79624
This commit is contained in:
Patrick Ohly
2019-07-09 15:00:30 +02:00
parent be9f9091ca
commit 555ff7ef10
9 changed files with 413 additions and 104 deletions
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82
pkg/volume/csi/csi_plugin_test.go
View File

@@ -520,27 +520,27 @@ func TestPluginNewMounter(t *testing.T) {
defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.CSIBlockVolume, true)()
tests := []struct {
name string
spec *volume.Spec
podUID types.UID
namespace string
driverMode driverMode
shouldFail bool
name string
spec *volume.Spec
podUID types.UID
namespace string
csiVolumeMode csiVolumeMode
shouldFail bool
}{
{
name: "mounter from persistent volume source",
spec: volume.NewSpecFromPersistentVolume(makeTestPV("test-pv1", 20, testDriver, testVol), true),
podUID: types.UID(fmt.Sprintf("%08X", rand.Uint64())),
namespace: "test-ns1",
driverMode: persistentDriverMode,
name: "mounter from persistent volume source",
spec: volume.NewSpecFromPersistentVolume(makeTestPV("test-pv1", 20, testDriver, testVol), true),
podUID: types.UID(fmt.Sprintf("%08X", rand.Uint64())),
namespace: "test-ns1",
csiVolumeMode: persistentVolumeMode,
},
{
name: "mounter from volume source",
spec: volume.NewSpecFromVolume(makeTestVol("test-vol1", testDriver)),
podUID: types.UID(fmt.Sprintf("%08X", rand.Uint64())),
namespace: "test-ns2",
driverMode: ephemeralDriverMode,
shouldFail: true, // csi inline not enabled
name: "mounter from volume source",
spec: volume.NewSpecFromVolume(makeTestVol("test-vol1", testDriver)),
podUID: types.UID(fmt.Sprintf("%08X", rand.Uint64())),
namespace: "test-ns2",
csiVolumeMode: ephemeralVolumeMode,
shouldFail: true, // csi inline not enabled
},
{
name: "mounter from no spec provided",
@@ -590,8 +590,8 @@ func TestPluginNewMounter(t *testing.T) {
if csiClient == nil {
t.Error("mounter csiClient is nil")
}
if csiMounter.driverMode != test.driverMode {
t.Error("unexpected driver mode:", csiMounter.driverMode)
if csiMounter.csiVolumeMode != test.csiVolumeMode {
t.Error("unexpected driver mode:", csiMounter.csiVolumeMode)
}
// ensure data file is created
@@ -620,8 +620,8 @@ func TestPluginNewMounter(t *testing.T) {
if data[volDataKey.nodeName] != string(csiMounter.plugin.host.GetNodeName()) {
t.Error("volume data file unexpected nodeName:", data[volDataKey.nodeName])
}
if data[volDataKey.driverMode] != string(test.driverMode) {
t.Error("volume data file unexpected driverMode:", data[volDataKey.driverMode])
if data[volDataKey.csiVolumeMode] != string(test.csiVolumeMode) {
t.Error("volume data file unexpected csiVolumeMode:", data[volDataKey.csiVolumeMode])
}
})
}
@@ -631,12 +631,12 @@ func TestPluginNewMounterWithInline(t *testing.T) {
defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.CSIBlockVolume, true)()
defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.CSIInlineVolume, true)()
tests := []struct {
name string
spec *volume.Spec
podUID types.UID
namespace string
driverMode driverMode
shouldFail bool
name string
spec *volume.Spec
podUID types.UID
namespace string
csiVolumeMode csiVolumeMode
shouldFail bool
}{
{
name: "mounter with missing spec",
@@ -652,18 +652,18 @@ func TestPluginNewMounterWithInline(t *testing.T) {
shouldFail: true,
},
{
name: "mounter with persistent volume source",
spec: volume.NewSpecFromPersistentVolume(makeTestPV("test-pv1", 20, testDriver, testVol), true),
podUID: types.UID(fmt.Sprintf("%08X", rand.Uint64())),
namespace: "test-ns1",
driverMode: persistentDriverMode,
name: "mounter with persistent volume source",
spec: volume.NewSpecFromPersistentVolume(makeTestPV("test-pv1", 20, testDriver, testVol), true),
podUID: types.UID(fmt.Sprintf("%08X", rand.Uint64())),
namespace: "test-ns1",
csiVolumeMode: persistentVolumeMode,
},
{
name: "mounter with volume source",
spec: volume.NewSpecFromVolume(makeTestVol("test-vol1", testDriver)),
podUID: types.UID(fmt.Sprintf("%08X", rand.Uint64())),
namespace: "test-ns2",
driverMode: ephemeralDriverMode,
name: "mounter with volume source",
spec: volume.NewSpecFromVolume(makeTestVol("test-vol1", testDriver)),
podUID: types.UID(fmt.Sprintf("%08X", rand.Uint64())),
namespace: "test-ns2",
csiVolumeMode: ephemeralVolumeMode,
},
}
@@ -709,8 +709,8 @@ func TestPluginNewMounterWithInline(t *testing.T) {
if csiClient == nil {
t.Error("mounter csiClient is nil")
}
if csiMounter.driverMode != test.driverMode {
t.Error("unexpected driver mode:", csiMounter.driverMode)
if csiMounter.csiVolumeMode != test.csiVolumeMode {
t.Error("unexpected driver mode:", csiMounter.csiVolumeMode)
}
// ensure data file is created
@@ -739,8 +739,8 @@ func TestPluginNewMounterWithInline(t *testing.T) {
if data[volDataKey.nodeName] != string(csiMounter.plugin.host.GetNodeName()) {
t.Error("volume data file unexpected nodeName:", data[volDataKey.nodeName])
}
if data[volDataKey.driverMode] != string(csiMounter.driverMode) {
t.Error("volume data file unexpected driverMode:", data[volDataKey.driverMode])
if data[volDataKey.csiVolumeMode] != string(csiMounter.csiVolumeMode) {
t.Error("volume data file unexpected csiVolumeMode:", data[volDataKey.csiVolumeMode])
}
})
}