// NewStorageCodec assembles a storage codec for the provided storage media type, the provided serializer, and the requested
// storage and memory versions.
func NewStorageCodec(storageMediaType string, ns runtime.StorageSerializer, storageVersion, memoryVersion schema.GroupVersion, config storagebackend.Config) (runtime.Codec, error) {
	mediaType, _, err := mime.ParseMediaType(storageMediaType)
	if err != nil {
		return nil, fmt.Errorf("%q is not a valid mime-type", storageMediaType)
	}
	serializer, ok := runtime.SerializerInfoForMediaType(ns.SupportedMediaTypes(), mediaType)
	if !ok {
		return nil, fmt.Errorf("unable to find serializer for %q", storageMediaType)
	}

	s := serializer.Serializer

	// etcd2 only supports string data - we must wrap any result before returning
	// TODO: storagebackend should return a boolean indicating whether it supports binary data
	if !serializer.EncodesAsText && (config.Type == storagebackend.StorageTypeUnset || config.Type == storagebackend.StorageTypeETCD2) {
		glog.V(4).Infof("Wrapping the underlying binary storage serializer with a base64 encoding for etcd2")
		s = runtime.NewBase64Serializer(s)
	}

	encoder := ns.EncoderForVersion(
		s,
		runtime.NewMultiGroupVersioner(
			storageVersion,
			schema.GroupKind{Group: storageVersion.Group},
			schema.GroupKind{Group: memoryVersion.Group},
		),
	)

	ds := recognizer.NewDecoder(s, ns.UniversalDeserializer())
	decoder := ns.DecoderToVersion(
		ds,
		runtime.NewMultiGroupVersioner(
			memoryVersion,
			schema.GroupKind{Group: memoryVersion.Group},
			schema.GroupKind{Group: storageVersion.Group},
		),
	)

	return runtime.NewCodec(encoder, decoder), nil
}
func TestSetControllerConversion(t *testing.T) {
	if err := api.Scheme.AddConversionFuncs(Convert_v1beta1_ReplicaSet_to_api_ReplicationController); err != nil {
		t.Fatal(err)
	}

	rs := &extensions.ReplicaSet{}
	rc := &api.ReplicationController{}

	extGroup := testapi.Extensions
	defaultGroup := testapi.Default

	fuzzInternalObject(t, extGroup.InternalGroupVersion(), rs, rand.Int63())

	t.Logf("rs._internal.extensions -> rs.v1beta1.extensions")
	data, err := runtime.Encode(extGroup.Codec(), rs)
	if err != nil {
		t.Fatalf("unexpected encoding error: %v", err)
	}

	decoder := api.Codecs.DecoderToVersion(
		api.Codecs.UniversalDeserializer(),
		runtime.NewMultiGroupVersioner(
			*defaultGroup.GroupVersion(),
			schema.GroupKind{Group: defaultGroup.GroupVersion().Group},
			schema.GroupKind{Group: extGroup.GroupVersion().Group},
		),
	)

	t.Logf("rs.v1beta1.extensions -> rc._internal")
	if err := runtime.DecodeInto(decoder, data, rc); err != nil {
		t.Fatalf("unexpected decoding error: %v", err)
	}

	t.Logf("rc._internal -> rc.v1")
	data, err = runtime.Encode(defaultGroup.Codec(), rc)
	if err != nil {
		t.Fatalf("unexpected encoding error: %v", err)
	}

	t.Logf("rc.v1 -> rs._internal.extensions")
	if err := runtime.DecodeInto(decoder, data, rs); err != nil {
		t.Fatalf("unexpected decoding error: %v", err)
	}
}
Exemple #3
0
func TestConvertToVersion(t *testing.T) {
	testCases := []struct {
		scheme *runtime.Scheme
		in     runtime.Object
		gv     runtime.GroupVersioner
		same   bool
		out    runtime.Object
		errFn  func(error) bool
	}{
		// errors if the type is not registered in the scheme
		{
			scheme: GetTestScheme(),
			in:     &UnknownType{},
			errFn:  func(err error) bool { return err != nil && runtime.IsNotRegisteredError(err) },
		},
		// errors if the group versioner returns no target
		{
			scheme: GetTestScheme(),
			in:     &ExternalTestType1{A: "test"},
			gv:     testGroupVersioner{},
			errFn: func(err error) bool {
				return err != nil && strings.Contains(err.Error(), "is not suitable for converting")
			},
		},
		// converts to internal
		{
			scheme: GetTestScheme(),
			in:     &ExternalTestType1{A: "test"},
			gv:     schema.GroupVersion{Version: "__internal"},
			out:    &TestType1{A: "test"},
		},
		// prefers the best match
		{
			scheme: GetTestScheme(),
			in:     &ExternalTestType1{A: "test"},
			gv:     schema.GroupVersions{{Version: "__internal"}, {Version: "v1"}},
			out: &ExternalTestType1{
				MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "v1", ObjectKind: "TestType1"},
				A: "test",
			},
		},
		// unversioned type returned as-is
		{
			scheme: GetTestScheme(),
			in:     &UnversionedType{A: "test"},
			gv:     schema.GroupVersions{{Version: "v1"}},
			same:   true,
			out: &UnversionedType{
				MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "v1", ObjectKind: "UnversionedType"},
				A: "test",
			},
		},
		// unversioned type returned when not included in the target types
		{
			scheme: GetTestScheme(),
			in:     &UnversionedType{A: "test"},
			gv:     schema.GroupVersions{{Group: "other", Version: "v2"}},
			same:   true,
			out: &UnversionedType{
				MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "v1", ObjectKind: "UnversionedType"},
				A: "test",
			},
		},
		// detected as already being in the target version
		{
			scheme: GetTestScheme(),
			in:     &ExternalTestType1{A: "test"},
			gv:     schema.GroupVersions{{Version: "v1"}},
			same:   true,
			out: &ExternalTestType1{
				MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "v1", ObjectKind: "TestType1"},
				A: "test",
			},
		},
		// detected as already being in the first target version
		{
			scheme: GetTestScheme(),
			in:     &ExternalTestType1{A: "test"},
			gv:     schema.GroupVersions{{Version: "v1"}, {Version: "__internal"}},
			same:   true,
			out: &ExternalTestType1{
				MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "v1", ObjectKind: "TestType1"},
				A: "test",
			},
		},
		// detected as already being in the first target version
		{
			scheme: GetTestScheme(),
			in:     &ExternalTestType1{A: "test"},
			gv:     schema.GroupVersions{{Version: "v1"}, {Version: "__internal"}},
			same:   true,
			out: &ExternalTestType1{
				MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "v1", ObjectKind: "TestType1"},
				A: "test",
			},
		},
		// the external type is registered in multiple groups, versions, and kinds, and can be targeted to all of them (1/3): different kind
		{
			scheme: GetTestScheme(),
			in:     &ExternalTestType1{A: "test"},
			gv:     testGroupVersioner{ok: true, target: schema.GroupVersionKind{Kind: "TestType3", Version: "v1"}},
			same:   true,
			out: &ExternalTestType1{
				MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "v1", ObjectKind: "TestType3"},
				A: "test",
			},
		},
		// the external type is registered in multiple groups, versions, and kinds, and can be targeted to all of them (2/3): different gv
		{
			scheme: GetTestScheme(),
			in:     &ExternalTestType1{A: "test"},
			gv:     testGroupVersioner{ok: true, target: schema.GroupVersionKind{Kind: "TestType3", Group: "custom", Version: "v1"}},
			same:   true,
			out: &ExternalTestType1{
				MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "custom/v1", ObjectKind: "TestType3"},
				A: "test",
			},
		},
		// the external type is registered in multiple groups, versions, and kinds, and can be targeted to all of them (3/3): different gvk
		{
			scheme: GetTestScheme(),
			in:     &ExternalTestType1{A: "test"},
			gv:     testGroupVersioner{ok: true, target: schema.GroupVersionKind{Group: "custom", Version: "v1", Kind: "TestType5"}},
			same:   true,
			out: &ExternalTestType1{
				MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "custom/v1", ObjectKind: "TestType5"},
				A: "test",
			},
		},
		// multi group versioner recognizes multiple groups and forces the output to a particular version, copies because version differs
		{
			scheme: GetTestScheme(),
			in:     &ExternalTestType1{A: "test"},
			gv:     runtime.NewMultiGroupVersioner(schema.GroupVersion{Group: "other", Version: "v2"}, schema.GroupKind{Group: "custom", Kind: "TestType3"}, schema.GroupKind{Kind: "TestType1"}),
			out: &ExternalTestType1{
				MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "other/v2", ObjectKind: "TestType1"},
				A: "test",
			},
		},
		// multi group versioner recognizes multiple groups and forces the output to a particular version, copies because version differs
		{
			scheme: GetTestScheme(),
			in:     &ExternalTestType1{A: "test"},
			gv:     runtime.NewMultiGroupVersioner(schema.GroupVersion{Group: "other", Version: "v2"}, schema.GroupKind{Kind: "TestType1"}, schema.GroupKind{Group: "custom", Kind: "TestType3"}),
			out: &ExternalTestType1{
				MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "other/v2", ObjectKind: "TestType1"},
				A: "test",
			},
		},
		// multi group versioner is unable to find a match when kind AND group don't match (there is no TestType1 kind in group "other", and no kind "TestType5" in the default group)
		{
			scheme: GetTestScheme(),
			in:     &TestType1{A: "test"},
			gv:     runtime.NewMultiGroupVersioner(schema.GroupVersion{Group: "custom", Version: "v1"}, schema.GroupKind{Group: "other"}, schema.GroupKind{Kind: "TestType5"}),
			errFn: func(err error) bool {
				return err != nil && strings.Contains(err.Error(), "is not suitable for converting")
			},
		},
		// multi group versioner recognizes multiple groups and forces the output to a particular version, performs no copy
		{
			scheme: GetTestScheme(),
			in:     &ExternalTestType1{A: "test"},
			gv:     runtime.NewMultiGroupVersioner(schema.GroupVersion{Group: "", Version: "v1"}, schema.GroupKind{Group: "custom", Kind: "TestType3"}, schema.GroupKind{Kind: "TestType1"}),
			same:   true,
			out: &ExternalTestType1{
				MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "v1", ObjectKind: "TestType1"},
				A: "test",
			},
		},
		// multi group versioner recognizes multiple groups and forces the output to a particular version, performs no copy
		{
			scheme: GetTestScheme(),
			in:     &ExternalTestType1{A: "test"},
			gv:     runtime.NewMultiGroupVersioner(schema.GroupVersion{Group: "", Version: "v1"}, schema.GroupKind{Kind: "TestType1"}, schema.GroupKind{Group: "custom", Kind: "TestType3"}),
			same:   true,
			out: &ExternalTestType1{
				MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "v1", ObjectKind: "TestType1"},
				A: "test",
			},
		},
		// group versioner can choose a particular target kind for a given input when kind is the same across group versions
		{
			scheme: GetTestScheme(),
			in:     &TestType1{A: "test"},
			gv:     testGroupVersioner{ok: true, target: schema.GroupVersionKind{Version: "v1", Kind: "TestType3"}},
			out: &ExternalTestType1{
				MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "v1", ObjectKind: "TestType3"},
				A: "test",
			},
		},
		// group versioner can choose a different kind
		{
			scheme: GetTestScheme(),
			in:     &TestType1{A: "test"},
			gv:     testGroupVersioner{ok: true, target: schema.GroupVersionKind{Kind: "TestType5", Group: "custom", Version: "v1"}},
			out: &ExternalTestType1{
				MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "custom/v1", ObjectKind: "TestType5"},
				A: "test",
			},
		},
	}
	for i, test := range testCases {
		original, _ := test.scheme.DeepCopy(test.in)
		out, err := test.scheme.ConvertToVersion(test.in, test.gv)
		switch {
		case test.errFn != nil:
			if !test.errFn(err) {
				t.Errorf("%d: unexpected error: %v", i, err)
			}
			continue
		case err != nil:
			t.Errorf("%d: unexpected error: %v", i, err)
			continue
		}
		if out == test.in {
			t.Errorf("%d: ConvertToVersion should always copy out: %#v", i, out)
			continue
		}

		if test.same {
			if !reflect.DeepEqual(original, test.in) {
				t.Errorf("%d: unexpected mutation of input: %s", i, diff.ObjectReflectDiff(original, test.in))
				continue
			}
			if !reflect.DeepEqual(out, test.out) {
				t.Errorf("%d: unexpected out: %s", i, diff.ObjectReflectDiff(out, test.out))
				continue
			}
			unsafe, err := test.scheme.UnsafeConvertToVersion(test.in, test.gv)
			if err != nil {
				t.Errorf("%d: unexpected error: %v", i, err)
				continue
			}
			if !reflect.DeepEqual(unsafe, test.out) {
				t.Errorf("%d: unexpected unsafe: %s", i, diff.ObjectReflectDiff(unsafe, test.out))
				continue
			}
			if unsafe != test.in {
				t.Errorf("%d: UnsafeConvertToVersion should return same object: %#v", i, unsafe)
				continue
			}
			continue
		}
		if !reflect.DeepEqual(out, test.out) {
			t.Errorf("%d: unexpected out: %s", i, diff.ObjectReflectDiff(out, test.out))
			continue
		}
	}
}