Merge pull request #571 from lavalamp/master

Decode/Encode everywhere

pkg/api/apiobj_test.go

@@ -68,6 +68,7 @@ func TestAPIObject(t *testing.T) {
 
 	// Things that Decode would have done for us:
 	decodedViaJSON.Kind = ""
+	decodedViaJSON.APIVersion = ""
 
 	if e, a := outer, &decodedViaJSON; !reflect.DeepEqual(e, a) {
 		t.Errorf("Expected: %#v but got %#v", e, a)

pkg/api/defaultcopy.go

@@ -0,0 +1,133 @@
+/*
+Copyright 2014 Google Inc. All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package api
+
+import (
+	"fmt"
+	"reflect"
+)
+
+// DefaultCopy copies API objects to/from their corresponding types
+// in a versioned package (e.g., v1beta1). Only suitable for types
+// in which no fields changed.
+// dest and src must both be pointers to API objects.
+// Not safe for objects with cyclic references!
+// TODO: Allow overrides, using the same function mechanism that
+// util.Fuzzer allows.
+func DefaultCopy(src, dest interface{}) error {
+	dv, sv := reflect.ValueOf(dest), reflect.ValueOf(src)
+	if dv.Kind() != reflect.Ptr {
+		return fmt.Errorf("Need pointer, but got %#v", dest)
+	}
+	if sv.Kind() != reflect.Ptr {
+		return fmt.Errorf("Need pointer, but got %#v", src)
+	}
+	dv = dv.Elem()
+	sv = sv.Elem()
+	if !dv.CanAddr() {
+		return fmt.Errorf("Can't write to dest")
+	}
+
+	// Ensure there's no reversed src/dest bugs by making src unwriteable.
+	sv = reflect.ValueOf(sv.Interface())
+	if sv.CanAddr() {
+		return fmt.Errorf("Can write to src, shouldn't be able to.")
+	}
+
+	return copyValue(sv, dv)
+}
+
+// Recursively copy sv into dv
+func copyValue(sv, dv reflect.Value) error {
+	dt, st := dv.Type(), sv.Type()
+	if dt.Name() != st.Name() {
+		return fmt.Errorf("Type names don't match: %v, %v", dt.Name(), st.Name())
+	}
+
+	// This should handle all simple types.
+	if st.AssignableTo(dt) {
+		dv.Set(sv)
+		return nil
+	} else if st.ConvertibleTo(dt) {
+		dv.Set(sv.Convert(dt))
+		return nil
+	}
+
+	// For debugging, should you need to do that.
+	if false {
+		fmt.Printf("copyVal of %v.%v (%v) -> %v.%v (%v)\n",
+			st.PkgPath(), st.Name(), st.Kind(),
+			dt.PkgPath(), dt.Name(), dt.Kind())
+	}
+
+	switch dv.Kind() {
+	case reflect.Struct:
+		for i := 0; i < dt.NumField(); i++ {
+			f := dv.Type().Field(i)
+			df := dv.FieldByName(f.Name)
+			sf := sv.FieldByName(f.Name)
+			if !df.IsValid() || !sf.IsValid() {
+				return fmt.Errorf("%v not present in source and dest.", f.Name)
+			}
+			if err := copyValue(sf, df); err != nil {
+				return err
+			}
+		}
+	case reflect.Slice:
+		if sv.IsNil() {
+			// Don't make a zero-length slice.
+			dv.Set(reflect.Zero(dt))
+			return nil
+		}
+		dv.Set(reflect.MakeSlice(dt, sv.Len(), sv.Cap()))
+		for i := 0; i < sv.Len(); i++ {
+			if err := copyValue(sv.Index(i), dv.Index(i)); err != nil {
+				return err
+			}
+		}
+	case reflect.Ptr:
+		if sv.IsNil() {
+			// Don't copy a nil ptr!
+			dv.Set(reflect.Zero(dt))
+			return nil
+		}
+		dv.Set(reflect.New(dt.Elem()))
+		return copyValue(sv.Elem(), dv.Elem())
+	case reflect.Map:
+		if sv.IsNil() {
+			// Don't copy a nil ptr!
+			dv.Set(reflect.Zero(dt))
+			return nil
+		}
+		dv.Set(reflect.MakeMap(dt))
+		for _, sk := range sv.MapKeys() {
+			dk := reflect.New(dt.Key()).Elem()
+			if err := copyValue(sk, dk); err != nil {
+				return err
+			}
+			dkv := reflect.New(dt.Elem()).Elem()
+			if err := copyValue(sv.MapIndex(sk), dkv); err != nil {
+				return err
+			}
+			dv.SetMapIndex(dk, dkv)
+		}
+	default:
+		return fmt.Errorf("Couldn't copy %#v (%v) into %#v (%v)",
+			sv.Interface(), sv.Kind(), dv.Interface(), dv.Kind())
+	}
+	return nil
+}

pkg/api/helper_test.go

@@ -17,12 +17,82 @@ limitations under the License.
 package api
 
 import (
+	"encoding/json"
+	"flag"
+	"fmt"
 	"reflect"
 	"testing"
+
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
 )
 
+var fuzzIters = flag.Int("fuzz_iters", 3, "How many fuzzing iterations to do.")
+
+// apiObjectFuzzer can randomly populate api objects.
+var apiObjectFuzzer = util.NewFuzzer(
+	func(j *JSONBase) {
+		// We have to customize the randomization of JSONBases because their
+		// APIVersion and Kind must remain blank in memory.
+		j.APIVersion = ""
+		j.Kind = ""
+		j.ID = util.RandString()
+		// TODO: Fix JSON/YAML packages and/or write custom encoding
+		// for uint64's. Somehow the LS *byte* of this is lost, but
+		// only when all 8 bytes are set.
+		j.ResourceVersion = util.RandUint64() >> 8
+		j.SelfLink = util.RandString()
+		j.CreationTimestamp = util.RandString()
+	},
+	func(intstr *util.IntOrString) {
+		// util.IntOrString will panic if its kind is set wrong.
+		if util.RandBool() {
+			intstr.Kind = util.IntstrInt
+			intstr.IntVal = int(util.RandUint64())
+			intstr.StrVal = ""
+		} else {
+			intstr.Kind = util.IntstrString
+			intstr.IntVal = 0
+			intstr.StrVal = util.RandString()
+		}
+	},
+	func(p *PodInfo) {
+		// The docker container type doesn't survive fuzzing.
+		// TODO: fix this.
+		*p = nil
+	},
+)
+
+func objDiff(a, b interface{}) string {
+
+	// An alternate diff attempt, in case json isn't showing you
+	// the difference. (reflect.DeepEqual makes a distinction between
+	// nil and empty slices, for example.)
+	return util.StringDiff(
+		fmt.Sprintf("%#v", a),
+		fmt.Sprintf("%#v", b),
+	)
+
+	ab, err := json.Marshal(a)
+	if err != nil {
+		panic("a")
+	}
+	bb, err := json.Marshal(b)
+	if err != nil {
+		panic("b")
+	}
+	return util.StringDiff(string(ab), string(bb))
+}
+
 func runTest(t *testing.T, source interface{}) {
-	name := reflect.TypeOf(source).Name()
+	name := reflect.TypeOf(source).Elem().Name()
+	apiObjectFuzzer.Fuzz(source)
+	j, err := FindJSONBase(source)
+	if err != nil {
+		t.Fatalf("Unexpected error %v for %#v", err, source)
+	}
+	j.SetKind("")
+	j.SetAPIVersion("")
+
 	data, err := Encode(source)
 	if err != nil {
 		t.Errorf("%v: %v (%#v)", name, err, source)
@@ -32,58 +102,51 @@ func runTest(t *testing.T, source interface{}) {
 	if err != nil {
 		t.Errorf("%v: %v", name, err)
 		return
-	}
-	if !reflect.DeepEqual(source, obj2) {
-		t.Errorf("1: %v: wanted %#v, got %#v", name, source, obj2)
-		return
+	} else {
+		if !reflect.DeepEqual(source, obj2) {
+			t.Errorf("1: %v: diff: %v", name, objDiff(source, obj2))
+			return
+		}
 	}
 	obj3 := reflect.New(reflect.TypeOf(source).Elem()).Interface()
 	err = DecodeInto(data, obj3)
 	if err != nil {
 		t.Errorf("2: %v: %v", name, err)
 		return
-	}
-	if !reflect.DeepEqual(source, obj3) {
-		t.Errorf("3: %v: wanted %#v, got %#v", name, source, obj3)
-		return
+	} else {
+		if !reflect.DeepEqual(source, obj3) {
+			t.Errorf("3: %v: diff: %v", name, objDiff(source, obj3))
+			return
+		}
 	}
 }
 
 func TestTypes(t *testing.T) {
 	// TODO: auto-fill all fields.
 	table := []interface{}{
-		&Pod{
-			JSONBase: JSONBase{
-				ID: "mylittlepod",
-			},
-			Labels: map[string]string{
-				"name": "pinky",
-			},
-		},
+		&PodList{},
+		&Pod{},
+		&ServiceList{},
 		&Service{},
-		&ServiceList{
-			Items: []Service{
-				{
-					Labels: map[string]string{
-						"foo": "bar",
-					},
-				}, {
-					Labels: map[string]string{
-						"foo": "baz",
-					},
-				},
-			},
-		},
 		&ReplicationControllerList{},
 		&ReplicationController{},
-		&PodList{},
+		&MinionList{},
+		&Minion{},
+		&Status{},
+		&ServerOpList{},
+		&ServerOp{},
+		&ContainerManifestList{},
+		&Endpoints{},
 	}
 	for _, item := range table {
-		runTest(t, item)
+		// Try a few times, since runTest uses random values.
+		for i := 0; i < *fuzzIters; i++ {
+			runTest(t, item)
+		}
 	}
 }
 
-func TestNonPtr(t *testing.T) {
+func TestEncode_NonPtr(t *testing.T) {
 	pod := Pod{
 		Labels: map[string]string{"name": "foo"},
 	}
@@ -91,30 +154,30 @@ func TestNonPtr(t *testing.T) {
 	data, err := Encode(obj)
 	obj2, err2 := Decode(data)
 	if err != nil || err2 != nil {
-		t.Errorf("Failure: %v %v", err2, err2)
+		t.Fatalf("Failure: '%v' '%v'", err, err2)
 	}
 	if _, ok := obj2.(*Pod); !ok {
-		t.Errorf("Got wrong type")
+		t.Fatalf("Got wrong type")
 	}
 	if !reflect.DeepEqual(obj2, &pod) {
 		t.Errorf("Expected:\n %#v,\n Got:\n %#v", &pod, obj2)
 	}
 }
 
-func TestPtr(t *testing.T) {
-	pod := Pod{
+func TestEncode_Ptr(t *testing.T) {
+	pod := &Pod{
 		Labels: map[string]string{"name": "foo"},
 	}
-	obj := interface{}(&pod)
+	obj := interface{}(pod)
 	data, err := Encode(obj)
 	obj2, err2 := Decode(data)
 	if err != nil || err2 != nil {
-		t.Errorf("Failure: %v %v", err2, err2)
+		t.Fatalf("Failure: '%v' '%v'", err, err2)
 	}
 	if _, ok := obj2.(*Pod); !ok {
-		t.Errorf("Got wrong type")
+		t.Fatalf("Got wrong type")
 	}
-	if !reflect.DeepEqual(obj2, &pod) {
+	if !reflect.DeepEqual(obj2, pod) {
 		t.Errorf("Expected:\n %#v,\n Got:\n %#v", &pod, obj2)
 	}
 }

pkg/api/jsonbase.go

@@ -0,0 +1,108 @@
+/*
+Copyright 2014 Google Inc. All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package api
+
+import (
+	"fmt"
+	"reflect"
+)
+
+// JSONBase lets you work with a JSONBase from any of the versioned or
+// internal APIObjects.
+type JSONBaseInterface interface {
+	APIVersion() string
+	SetAPIVersion(version string)
+	Kind() string
+	SetKind(kind string)
+	ResourceVersion() uint64
+	SetResourceVersion(version uint64)
+}
+
+type genericJSONBase struct {
+	apiVersion      *string
+	kind            *string
+	resourceVersion *uint64
+}
+
+func (g genericJSONBase) APIVersion() string {
+	return *g.apiVersion
+}
+
+func (g genericJSONBase) SetAPIVersion(version string) {
+	*g.apiVersion = version
+}
+
+func (g genericJSONBase) Kind() string {
+	return *g.kind
+}
+
+func (g genericJSONBase) SetKind(kind string) {
+	*g.kind = kind
+}
+
+func (g genericJSONBase) ResourceVersion() uint64 {
+	return *g.resourceVersion
+}
+
+func (g genericJSONBase) SetResourceVersion(version uint64) {
+	*g.resourceVersion = version
+}
+
+// fieldPtr puts the address address of fieldName, which must be a member of v,
+// into dest, which must be an address of a variable to which this field's address
+// can be assigned.
+func fieldPtr(v reflect.Value, fieldName string, dest interface{}) error {
+	field := v.FieldByName(fieldName)
+	if !field.IsValid() {
+		return fmt.Errorf("Couldn't find %v field in %#v", fieldName, v.Interface())
+	}
+	v = reflect.ValueOf(dest)
+	if v.Kind() != reflect.Ptr {
+		return fmt.Errorf("dest should be ptr")
+	}
+	v = v.Elem()
+	field = field.Addr()
+	if field.Type().AssignableTo(v.Type()) {
+		v.Set(field)
+		return nil
+	}
+	if field.Type().ConvertibleTo(v.Type()) {
+		v.Set(field.Convert(v.Type()))
+		return nil
+	}
+	return fmt.Errorf("Couldn't assign/convert %v to %v", field.Type(), v.Type())
+}
+
+// newGenericJSONBase makes a new generic JSONBase from v, which must be an
+// addressable/setable reflect.Value having the same fields as api.JSONBase.
+// Returns an error if this isn't the case.
+func newGenericJSONBase(v reflect.Value) (genericJSONBase, error) {
+	g := genericJSONBase{}
+	err := fieldPtr(v, "APIVersion", &g.apiVersion)
+	if err != nil {
+		return g, err
+	}
+	err = fieldPtr(v, "Kind", &g.kind)
+	if err != nil {
+		return g, err
+	}
+	err = fieldPtr(v, "ResourceVersion", &g.resourceVersion)
+	if err != nil {
+		return g, err
+	}
+	return g, nil
+}

pkg/api/jsonbase_test.go

@@ -0,0 +1,59 @@
+/*
+Copyright 2014 Google Inc. All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package api
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestGenericJSONBase(t *testing.T) {
+	j := JSONBase{
+		APIVersion:      "a",
+		Kind:            "b",
+		ResourceVersion: 1,
+	}
+	g, err := newGenericJSONBase(reflect.ValueOf(&j).Elem())
+	if err != nil {
+		t.Fatalf("new err: %v", err)
+	}
+	// Proove g supports JSONBaseInterface.
+	jbi := JSONBaseInterface(g)
+	if e, a := "a", jbi.APIVersion(); e != a {
+		t.Errorf("expected %v, got %v", e, a)
+	}
+	if e, a := "b", jbi.Kind(); e != a {
+		t.Errorf("expected %v, got %v", e, a)
+	}
+	if e, a := uint64(1), jbi.ResourceVersion(); e != a {
+		t.Errorf("expected %v, got %v", e, a)
+	}
+
+	jbi.SetAPIVersion("c")
+	jbi.SetKind("d")
+	jbi.SetResourceVersion(2)
+
+	if e, a := "c", j.APIVersion; e != a {
+		t.Errorf("expected %v, got %v", e, a)
+	}
+	if e, a := "d", j.Kind; e != a {
+		t.Errorf("expected %v, got %v", e, a)
+	}
+	if e, a := uint64(2), j.ResourceVersion; e != a {
+		t.Errorf("expected %v, got %v", e, a)
+	}
+}

pkg/api/types.go

@@ -38,7 +38,7 @@ import (
 //     by the following regex:
 //         [a-z0-9]([-a-z0-9]*[a-z0-9])?
 //
-//  DNS_SUBDOMAIN:  This is a string, no more than 253 characters long, that conforms
+// DNS_SUBDOMAIN:  This is a string, no more than 253 characters long, that conforms
 //      to the definition of a "subdomain" in RFCs 1035 and 1123.  This is captured
 //      by the following regex:
 //         [a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*
@@ -58,6 +58,12 @@ type ContainerManifest struct {
 	Containers []Container `yaml:"containers" json:"containers"`
 }
 
+// ContainerManifestList is used to communicate container manifests to kubelet.
+type ContainerManifestList struct {
+	JSONBase `json:",inline" yaml:",inline"`
+	Items    []ContainerManifest `json:"items,omitempty" yaml:"items,omitempty"`
+}
+
 // Volume represents a named volume in a pod that may be accessed by any containers in the pod.
 type Volume struct {
 	// Required: This must be a DNS_LABEL.  Each volume in a pod must have
@@ -217,7 +223,8 @@ type PodState struct {
 	// entry per container in the manifest. The value of this map is currently the output
 	// of `docker inspect`. This output format is *not* final and should not be relied
 	// upon.
-	// TODO: Make real decisions about what our info should look like.
+	// TODO: Make real decisions about what our info should look like. Re-enable fuzz test
+	// when we have done this.
 	Info PodInfo `json:"info,omitempty" yaml:"info,omitempty"`
 }
 
@@ -289,8 +296,8 @@ type Service struct {
 // Endpoints is a collection of endpoints that implement the actual service, for example:
 // Name: "mysql", Endpoints: ["10.10.1.1:1909", "10.10.2.2:8834"]
 type Endpoints struct {
-	Name      string
-	Endpoints []string
+	JSONBase  `json:",inline" yaml:",inline"`
+	Endpoints []string `json:"endpoints,omitempty" yaml:"endpoints,omitempty"`
 }
 
 // Minion is a worker node in Kubernetenes.

pkg/api/v1beta1/types.go

@@ -38,7 +38,7 @@ import (
 //     by the following regex:
 //         [a-z0-9]([-a-z0-9]*[a-z0-9])?
 //
-//  DNS_SUBDOMAIN:  This is a string, no more than 253 characters long, that conforms
+// DNS_SUBDOMAIN:  This is a string, no more than 253 characters long, that conforms
 //      to the definition of a "subdomain" in RFCs 1035 and 1123.  This is captured
 //      by the following regex:
 //         [a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*
@@ -58,6 +58,12 @@ type ContainerManifest struct {
 	Containers []Container `yaml:"containers" json:"containers"`
 }
 
+// ContainerManifestList is used to communicate container manifests to kubelet.
+type ContainerManifestList struct {
+	JSONBase `json:",inline" yaml:",inline"`
+	Items    []ContainerManifest `json:"items,omitempty" yaml:"items,omitempty"`
+}
+
 // Volume represents a named volume in a pod that may be accessed by any containers in the pod.
 type Volume struct {
 	// Required: This must be a DNS_LABEL.  Each volume in a pod must have
@@ -289,8 +295,8 @@ type Service struct {
 // Endpoints is a collection of endpoints that implement the actual service, for example:
 // Name: "mysql", Endpoints: ["10.10.1.1:1909", "10.10.2.2:8834"]
 type Endpoints struct {
-	Name      string
-	Endpoints []string
+	JSONBase  `json:",inline" yaml:",inline"`
+	Endpoints []string `json:"endpoints,omitempty" yaml:"endpoints,omitempty"`
 }
 
 // Minion is a worker node in Kubernetenes.

pkg/kubelet/config/etcd.go

@@ -9,7 +9,7 @@ You may obtain a copy of the License at
 
 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or sied.
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 */
@@ -110,12 +110,12 @@ func responseToPods(response *etcd.Response) ([]kubelet.Pod, error) {
 		return pods, fmt.Errorf("no nodes field: %v", response)
 	}
 
-	manifests := []api.ContainerManifest{}
+	manifests := api.ContainerManifestList{}
 	if err := yaml.Unmarshal([]byte(response.Node.Value), &manifests); err != nil {
 		return pods, fmt.Errorf("could not unmarshal manifests: %v", err)
 	}
 
-	for i, manifest := range manifests {
+	for i, manifest := range manifests.Items {
 		name := manifest.ID
 		if name == "" {
 			name = fmt.Sprintf("_%d", i+1)

pkg/kubelet/config/etcd_test.go

@@ -24,7 +24,6 @@ import (
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/tools"
-	"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
 	"github.com/coreos/go-etcd/etcd"
 )
 
@@ -36,7 +35,9 @@ func TestGetEtcdData(t *testing.T) {
 	fakeClient.Data["/registry/hosts/machine/kubelet"] = tools.EtcdResponseWithError{
 		R: &etcd.Response{
 			Node: &etcd.Node{
-				Value:         util.MakeJSONString([]api.ContainerManifest{api.ContainerManifest{ID: "foo"}}),
+				Value: api.EncodeOrDie(&api.ContainerManifestList{
+					Items: []api.ContainerManifest{{ID: "foo"}},
+				}),
 				ModifiedIndex: 1,
 			},
 		},
@@ -76,7 +77,9 @@ func TestGetEtcd(t *testing.T) {
 	fakeClient.Data["/registry/hosts/machine/kubelet"] = tools.EtcdResponseWithError{
 		R: &etcd.Response{
 			Node: &etcd.Node{
-				Value:         util.MakeJSONString([]api.ContainerManifest{api.ContainerManifest{ID: "foo"}}),
+				Value: api.EncodeOrDie(&api.ContainerManifestList{
+					Items: []api.ContainerManifest{{ID: "foo"}},
+				}),
 				ModifiedIndex: 1,
 			},
 		},
@@ -103,7 +106,7 @@ func TestWatchEtcd(t *testing.T) {
 	fakeClient.Data["/registry/hosts/machine/kubelet"] = tools.EtcdResponseWithError{
 		R: &etcd.Response{
 			Node: &etcd.Node{
-				Value:         util.MakeJSONString([]api.Container{}),
+				Value:         api.EncodeOrDie(&api.ContainerManifestList{}),
 				ModifiedIndex: 2,
 			},
 		},

pkg/proxy/config/config.go

@@ -127,19 +127,19 @@ func (s *endpointsStore) Merge(source string, change interface{}) error {
 	case ADD:
 		glog.Infof("Adding new endpoint from source %s : %v", source, update.Endpoints)
 		for _, value := range update.Endpoints {
-			endpoints[value.Name] = value
+			endpoints[value.ID] = value
 		}
 	case REMOVE:
 		glog.Infof("Removing an endpoint %v", update)
 		for _, value := range update.Endpoints {
-			delete(endpoints, value.Name)
+			delete(endpoints, value.ID)
 		}
 	case SET:
 		glog.Infof("Setting endpoints %v", update)
 		// Clear the old map entries by just creating a new map
 		endpoints = make(map[string]api.Endpoints)
 		for _, value := range update.Endpoints {
-			endpoints[value.Name] = value
+			endpoints[value.ID] = value
 		}
 	default:
 		glog.Infof("Received invalid update type: %v", update)

pkg/proxy/config/config_test.go

@@ -83,7 +83,7 @@ func (s sortedEndpoints) Swap(i, j int) {
 	s[i], s[j] = s[j], s[i]
 }
 func (s sortedEndpoints) Less(i, j int) bool {
-	return s[i].Name < s[j].Name
+	return s[i].ID < s[j].ID
 }
 
 type EndpointsHandlerMock struct {
@@ -216,8 +216,14 @@ func TestNewMultipleSourcesEndpointsMultipleHandlersAddedAndNotified(t *testing.
 	handler2 := NewEndpointsHandlerMock()
 	config.RegisterHandler(handler)
 	config.RegisterHandler(handler2)
-	endpointsUpdate1 := CreateEndpointsUpdate(ADD, api.Endpoints{Name: "foo", Endpoints: []string{"endpoint1", "endpoint2"}})
-	endpointsUpdate2 := CreateEndpointsUpdate(ADD, api.Endpoints{Name: "bar", Endpoints: []string{"endpoint3", "endpoint4"}})
+	endpointsUpdate1 := CreateEndpointsUpdate(ADD, api.Endpoints{
+		JSONBase:  api.JSONBase{ID: "foo"},
+		Endpoints: []string{"endpoint1", "endpoint2"},
+	})
+	endpointsUpdate2 := CreateEndpointsUpdate(ADD, api.Endpoints{
+		JSONBase:  api.JSONBase{ID: "bar"},
+		Endpoints: []string{"endpoint3", "endpoint4"},
+	})
 	handler.Wait(2)
 	handler2.Wait(2)
 	channelOne <- endpointsUpdate1
@@ -236,8 +242,14 @@ func TestNewMultipleSourcesEndpointsMultipleHandlersAddRemoveSetAndNotified(t *t
 	handler2 := NewEndpointsHandlerMock()
 	config.RegisterHandler(handler)
 	config.RegisterHandler(handler2)
-	endpointsUpdate1 := CreateEndpointsUpdate(ADD, api.Endpoints{Name: "foo", Endpoints: []string{"endpoint1", "endpoint2"}})
-	endpointsUpdate2 := CreateEndpointsUpdate(ADD, api.Endpoints{Name: "bar", Endpoints: []string{"endpoint3", "endpoint4"}})
+	endpointsUpdate1 := CreateEndpointsUpdate(ADD, api.Endpoints{
+		JSONBase:  api.JSONBase{ID: "foo"},
+		Endpoints: []string{"endpoint1", "endpoint2"},
+	})
+	endpointsUpdate2 := CreateEndpointsUpdate(ADD, api.Endpoints{
+		JSONBase:  api.JSONBase{ID: "bar"},
+		Endpoints: []string{"endpoint3", "endpoint4"},
+	})
 	handler.Wait(2)
 	handler2.Wait(2)
 	channelOne <- endpointsUpdate1
@@ -248,7 +260,10 @@ func TestNewMultipleSourcesEndpointsMultipleHandlersAddRemoveSetAndNotified(t *t
 	handler2.ValidateEndpoints(t, endpoints)
 
 	// Add one more
-	endpointsUpdate3 := CreateEndpointsUpdate(ADD, api.Endpoints{Name: "foobar", Endpoints: []string{"endpoint5", "endpoint6"}})
+	endpointsUpdate3 := CreateEndpointsUpdate(ADD, api.Endpoints{
+		JSONBase:  api.JSONBase{ID: "foobar"},
+		Endpoints: []string{"endpoint5", "endpoint6"},
+	})
 	handler.Wait(1)
 	handler2.Wait(1)
 	channelTwo <- endpointsUpdate3
@@ -257,7 +272,10 @@ func TestNewMultipleSourcesEndpointsMultipleHandlersAddRemoveSetAndNotified(t *t
 	handler2.ValidateEndpoints(t, endpoints)
 
 	// Update the "foo" service with new endpoints
-	endpointsUpdate1 = CreateEndpointsUpdate(ADD, api.Endpoints{Name: "foo", Endpoints: []string{"endpoint77"}})
+	endpointsUpdate1 = CreateEndpointsUpdate(ADD, api.Endpoints{
+		JSONBase:  api.JSONBase{ID: "foo"},
+		Endpoints: []string{"endpoint77"},
+	})
 	handler.Wait(1)
 	handler2.Wait(1)
 	channelOne <- endpointsUpdate1
@@ -266,7 +284,7 @@ func TestNewMultipleSourcesEndpointsMultipleHandlersAddRemoveSetAndNotified(t *t
 	handler2.ValidateEndpoints(t, endpoints)
 
 	// Remove "bar" service
-	endpointsUpdate2 = CreateEndpointsUpdate(REMOVE, api.Endpoints{Name: "bar"})
+	endpointsUpdate2 = CreateEndpointsUpdate(REMOVE, api.Endpoints{JSONBase: api.JSONBase{ID: "bar"}})
 	handler.Wait(1)
 	handler2.Wait(1)
 	channelTwo <- endpointsUpdate2

pkg/proxy/config/etcd.go

@@ -34,7 +34,6 @@ limitations under the License.
 package config
 
 import (
-	"encoding/json"
 	"fmt"
 	"strings"
 	"time"
@@ -127,7 +126,7 @@ func (s ConfigSourceEtcd) GetServices() ([]api.Service, []api.Endpoints, error)
 		// and create a Service entry for it.
 		for i, node := range response.Node.Nodes {
 			var svc api.Service
-			err = json.Unmarshal([]byte(node.Value), &svc)
+			err = api.DecodeInto([]byte(node.Value), &svc)
 			if err != nil {
 				glog.Errorf("Failed to load Service: %s (%#v)", node.Value, err)
 				continue
@@ -154,7 +153,9 @@ func (s ConfigSourceEtcd) GetEndpoints(service string) (api.Endpoints, error) {
 		return api.Endpoints{}, err
 	}
 	// Parse all the endpoint specifications in this value.
-	return parseEndpoints(response.Node.Value)
+	var e api.Endpoints
+	err = api.DecodeInto([]byte(response.Node.Value), &e)
+	return e, err
 }
 
 // etcdResponseToService takes an etcd response and pulls it apart to find service.
@@ -163,19 +164,13 @@ func etcdResponseToService(response *etcd.Response) (*api.Service, error) {
 		return nil, fmt.Errorf("invalid response from etcd: %#v", response)
 	}
 	var svc api.Service
-	err := json.Unmarshal([]byte(response.Node.Value), &svc)
+	err := api.DecodeInto([]byte(response.Node.Value), &svc)
 	if err != nil {
 		return nil, err
 	}
 	return &svc, err
 }
 
-func parseEndpoints(jsonString string) (api.Endpoints, error) {
-	var e api.Endpoints
-	err := json.Unmarshal([]byte(jsonString), &e)
-	return e, err
-}
-
 func (s ConfigSourceEtcd) WatchForChanges() {
 	glog.Info("Setting up a watch for new services")
 	watchChannel := make(chan *etcd.Response)
@@ -220,7 +215,7 @@ func (s ConfigSourceEtcd) ProcessChange(response *etcd.Response) {
 func (s ConfigSourceEtcd) ProcessEndpointResponse(response *etcd.Response) {
 	glog.Infof("Processing a change in endpoint configuration... %s", *response)
 	var endpoints api.Endpoints
-	err := json.Unmarshal([]byte(response.Node.Value), &endpoints)
+	err := api.DecodeInto([]byte(response.Node.Value), &endpoints)
 	if err != nil {
 		glog.Errorf("Failed to parse service out of etcd key: %v : %+v", response.Node.Value, err)
 		return

pkg/proxy/config/etcd_test.go

@@ -1,56 +0,0 @@
-/*
-Copyright 2014 Google Inc. All rights reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-package config
-
-import (
-	"encoding/json"
-	"reflect"
-	"testing"
-
-	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
-)
-
-const TomcatContainerEtcdKey = "/registry/services/tomcat/endpoints/tomcat-3bd5af34"
-const TomcatService = "tomcat"
-const TomcatContainerID = "tomcat-3bd5af34"
-
-func validateJSONParsing(t *testing.T, jsonString string, expectedEndpoints api.Endpoints, expectError bool) {
-	endpoints, err := parseEndpoints(jsonString)
-	if err == nil && expectError {
-		t.Errorf("validateJSONParsing did not get expected error when parsing %s", jsonString)
-	}
-	if err != nil && !expectError {
-		t.Errorf("validateJSONParsing got unexpected error %+v when parsing %s", err, jsonString)
-	}
-	if !reflect.DeepEqual(expectedEndpoints, endpoints) {
-		t.Errorf("Didn't get expected endpoints %+v got: %+v", expectedEndpoints, endpoints)
-	}
-}
-
-func TestParseJsonEndpoints(t *testing.T) {
-	validateJSONParsing(t, "", api.Endpoints{}, true)
-	endpoints := api.Endpoints{
-		Name:      "foo",
-		Endpoints: []string{"foo", "bar", "baz"},
-	}
-	data, err := json.Marshal(endpoints)
-	if err != nil {
-		t.Errorf("Unexpected error: %#v", err)
-	}
-	validateJSONParsing(t, string(data), endpoints, false)
-	//	validateJSONParsing(t, "[{\"port\":8000,\"name\":\"mysql\",\"machine\":\"foo\"},{\"port\":9000,\"name\":\"mysql\",\"machine\":\"bar\"}]", []string{"foo:8000", "bar:9000"}, false)
-}

pkg/proxy/config/file.go

@@ -112,7 +112,7 @@ func (s ConfigSourceFile) Run() {
 		newEndpoints := make([]api.Endpoints, len(config.Services))
 		for i, service := range config.Services {
 			newServices[i] = api.Service{JSONBase: api.JSONBase{ID: service.Name}, Port: service.Port}
-			newEndpoints[i] = api.Endpoints{Name: service.Name, Endpoints: service.Endpoints}
+			newEndpoints[i] = api.Endpoints{JSONBase: api.JSONBase{ID: service.Name}, Endpoints: service.Endpoints}
 		}
 		if !reflect.DeepEqual(lastServices, newServices) {
 			serviceUpdate := ServiceUpdate{Op: SET, Services: newServices}

pkg/proxy/proxier_test.go

@@ -52,7 +52,8 @@ func TestProxy(t *testing.T) {
 	}
 
 	lb := NewLoadBalancerRR()
-	lb.OnUpdate([]api.Endpoints{{"echo", []string{net.JoinHostPort("127.0.0.1", port)}}})
+	lb.OnUpdate([]api.Endpoints{
+		{JSONBase: api.JSONBase{ID: "echo"}, Endpoints: []string{net.JoinHostPort("127.0.0.1", port)}}})
 
 	p := NewProxier(lb)
 

pkg/proxy/roundrobbin.go

@@ -89,15 +89,15 @@ func (impl LoadBalancerRR) OnUpdate(endpoints []api.Endpoints) {
 	defer impl.lock.Unlock()
 	// First update / add all new endpoints for services.
 	for _, value := range endpoints {
-		existingEndpoints, exists := impl.endpointsMap[value.Name]
+		existingEndpoints, exists := impl.endpointsMap[value.ID]
 		validEndpoints := impl.filterValidEndpoints(value.Endpoints)
 		if !exists || !reflect.DeepEqual(existingEndpoints, validEndpoints) {
-			glog.Infof("LoadBalancerRR: Setting endpoints for %s to %+v", value.Name, value.Endpoints)
-			impl.endpointsMap[value.Name] = validEndpoints
+			glog.Infof("LoadBalancerRR: Setting endpoints for %s to %+v", value.ID, value.Endpoints)
+			impl.endpointsMap[value.ID] = validEndpoints
 			// Start RR from the beginning if added or updated.
-			impl.rrIndex[value.Name] = 0
+			impl.rrIndex[value.ID] = 0
 		}
-		tmp[value.Name] = true
+		tmp[value.ID] = true
 	}
 	// Then remove any endpoints no longer relevant
 	for key, value := range impl.endpointsMap {

pkg/proxy/roundrobbin_test.go

@@ -87,7 +87,10 @@ func TestLoadBalanceWorksWithSingleEndpoint(t *testing.T) {
 		t.Errorf("Didn't fail with non-existent service")
 	}
 	endpoints := make([]api.Endpoints, 1)
-	endpoints[0] = api.Endpoints{Name: "foo", Endpoints: []string{"endpoint1:40"}}
+	endpoints[0] = api.Endpoints{
+		JSONBase:  api.JSONBase{ID: "foo"},
+		Endpoints: []string{"endpoint1:40"},
+	}
 	loadBalancer.OnUpdate(endpoints)
 	expectEndpoint(t, loadBalancer, "foo", "endpoint1:40")
 	expectEndpoint(t, loadBalancer, "foo", "endpoint1:40")
@@ -102,7 +105,10 @@ func TestLoadBalanceWorksWithMultipleEndpoints(t *testing.T) {
 		t.Errorf("Didn't fail with non-existent service")
 	}
 	endpoints := make([]api.Endpoints, 1)
-	endpoints[0] = api.Endpoints{Name: "foo", Endpoints: []string{"endpoint:1", "endpoint:2", "endpoint:3"}}
+	endpoints[0] = api.Endpoints{
+		JSONBase:  api.JSONBase{ID: "foo"},
+		Endpoints: []string{"endpoint:1", "endpoint:2", "endpoint:3"},
+	}
 	loadBalancer.OnUpdate(endpoints)
 	expectEndpoint(t, loadBalancer, "foo", "endpoint:1")
 	expectEndpoint(t, loadBalancer, "foo", "endpoint:2")
@@ -117,7 +123,10 @@ func TestLoadBalanceWorksWithMultipleEndpointsAndUpdates(t *testing.T) {
 		t.Errorf("Didn't fail with non-existent service")
 	}
 	endpoints := make([]api.Endpoints, 1)
-	endpoints[0] = api.Endpoints{Name: "foo", Endpoints: []string{"endpoint:1", "endpoint:2", "endpoint:3"}}
+	endpoints[0] = api.Endpoints{
+		JSONBase:  api.JSONBase{ID: "foo"},
+		Endpoints: []string{"endpoint:1", "endpoint:2", "endpoint:3"},
+	}
 	loadBalancer.OnUpdate(endpoints)
 	expectEndpoint(t, loadBalancer, "foo", "endpoint:1")
 	expectEndpoint(t, loadBalancer, "foo", "endpoint:2")
@@ -126,14 +135,16 @@ func TestLoadBalanceWorksWithMultipleEndpointsAndUpdates(t *testing.T) {
 	expectEndpoint(t, loadBalancer, "foo", "endpoint:2")
 	// Then update the configuration with one fewer endpoints, make sure
 	// we start in the beginning again
-	endpoints[0] = api.Endpoints{Name: "foo", Endpoints: []string{"endpoint:8", "endpoint:9"}}
+	endpoints[0] = api.Endpoints{JSONBase: api.JSONBase{ID: "foo"},
+		Endpoints: []string{"endpoint:8", "endpoint:9"},
+	}
 	loadBalancer.OnUpdate(endpoints)
 	expectEndpoint(t, loadBalancer, "foo", "endpoint:8")
 	expectEndpoint(t, loadBalancer, "foo", "endpoint:9")
 	expectEndpoint(t, loadBalancer, "foo", "endpoint:8")
 	expectEndpoint(t, loadBalancer, "foo", "endpoint:9")
 	// Clear endpoints
-	endpoints[0] = api.Endpoints{Name: "foo", Endpoints: []string{}}
+	endpoints[0] = api.Endpoints{JSONBase: api.JSONBase{ID: "foo"}, Endpoints: []string{}}
 	loadBalancer.OnUpdate(endpoints)
 
 	endpoint, err = loadBalancer.LoadBalance("foo", nil)
@@ -149,8 +160,14 @@ func TestLoadBalanceWorksWithServiceRemoval(t *testing.T) {
 		t.Errorf("Didn't fail with non-existent service")
 	}
 	endpoints := make([]api.Endpoints, 2)
-	endpoints[0] = api.Endpoints{Name: "foo", Endpoints: []string{"endpoint:1", "endpoint:2", "endpoint:3"}}
-	endpoints[1] = api.Endpoints{Name: "bar", Endpoints: []string{"endpoint:4", "endpoint:5"}}
+	endpoints[0] = api.Endpoints{
+		JSONBase:  api.JSONBase{ID: "foo"},
+		Endpoints: []string{"endpoint:1", "endpoint:2", "endpoint:3"},
+	}
+	endpoints[1] = api.Endpoints{
+		JSONBase:  api.JSONBase{ID: "bar"},
+		Endpoints: []string{"endpoint:4", "endpoint:5"},
+	}
 	loadBalancer.OnUpdate(endpoints)
 	expectEndpoint(t, loadBalancer, "foo", "endpoint:1")
 	expectEndpoint(t, loadBalancer, "foo", "endpoint:2")

pkg/registry/endpoints.go

@@ -88,7 +88,7 @@ func (e *EndpointController) SyncServiceEndpoints() error {
 			endpoints[ix] = net.JoinHostPort(pod.CurrentState.PodIP, strconv.Itoa(port))
 		}
 		err = e.serviceRegistry.UpdateEndpoints(api.Endpoints{
-			Name:      service.ID,
+			JSONBase:  api.JSONBase{ID: service.ID},
 			Endpoints: endpoints,
 		})
 		if err != nil {

pkg/registry/etcd_registry.go

@@ -112,9 +112,10 @@ func (registry *EtcdRegistry) runPod(pod api.Pod, machine string) error {
 	}
 
 	contKey := makeContainerKey(machine)
-	err = registry.helper().AtomicUpdate(contKey, &[]api.ContainerManifest{}, func(in interface{}) (interface{}, error) {
-		manifests := *in.(*[]api.ContainerManifest)
-		return append(manifests, manifest), nil
+	err = registry.helper().AtomicUpdate(contKey, &api.ContainerManifestList{}, func(in interface{}) (interface{}, error) {
+		manifests := *in.(*api.ContainerManifestList)
+		manifests.Items = append(manifests.Items, manifest)
+		return manifests, nil
 	})
 	if err != nil {
 		// Don't strand stuff.
@@ -153,11 +154,11 @@ func (registry *EtcdRegistry) deletePodFromMachine(machine, podID string) error
 
 	// Next, remove the pod from the machine atomically.
 	contKey := makeContainerKey(machine)
-	return registry.helper().AtomicUpdate(contKey, &[]api.ContainerManifest{}, func(in interface{}) (interface{}, error) {
-		manifests := *in.(*[]api.ContainerManifest)
-		newManifests := make([]api.ContainerManifest, 0, len(manifests))
+	return registry.helper().AtomicUpdate(contKey, &api.ContainerManifestList{}, func(in interface{}) (interface{}, error) {
+		manifests := in.(*api.ContainerManifestList)
+		newManifests := make([]api.ContainerManifest, 0, len(manifests.Items))
 		found := false
-		for _, manifest := range manifests {
+		for _, manifest := range manifests.Items {
 			if manifest.ID != podID {
 				newManifests = append(newManifests, manifest)
 			} else {
@@ -170,7 +171,8 @@ func (registry *EtcdRegistry) deletePodFromMachine(machine, podID string) error
 			// However it is "deleted" so log it and move on
 			glog.Infof("Couldn't find: %s in %#v", podID, manifests)
 		}
-		return newManifests, nil
+		manifests.Items = newManifests
+		return manifests, nil
 	})
 }
 
@@ -304,5 +306,5 @@ func (registry *EtcdRegistry) UpdateService(svc api.Service) error {
 
 // UpdateEndpoints update Endpoints of a Service.
 func (registry *EtcdRegistry) UpdateEndpoints(e api.Endpoints) error {
-	return registry.helper().SetObj("/registry/services/endpoints/"+e.Name, e)
+	return registry.helper().SetObj("/registry/services/endpoints/"+e.ID, e)
 }

pkg/registry/etcd_registry_test.go

@@ -17,7 +17,6 @@ limitations under the License.
 package registry
 
 import (
-	"encoding/json"
 	"reflect"
 	"testing"
 
@@ -70,7 +69,7 @@ func TestEtcdCreatePod(t *testing.T) {
 		},
 		E: tools.EtcdErrorNotFound,
 	}
-	fakeClient.Set("/registry/hosts/machine/kubelet", util.MakeJSONString([]api.ContainerManifest{}), 0)
+	fakeClient.Set("/registry/hosts/machine/kubelet", api.EncodeOrDie(&api.ContainerManifestList{}), 0)
 	registry := MakeTestEtcdRegistry(fakeClient, []string{"machine"})
 	err := registry.CreatePod("machine", api.Pod{
 		JSONBase: api.JSONBase{
@@ -88,18 +87,20 @@ func TestEtcdCreatePod(t *testing.T) {
 	})
 	expectNoError(t, err)
 	resp, err := fakeClient.Get("/registry/hosts/machine/pods/foo", false, false)
-	expectNoError(t, err)
+	if err != nil {
+		t.Fatalf("Unexpected error %v", err)
+	}
 	var pod api.Pod
-	err = json.Unmarshal([]byte(resp.Node.Value), &pod)
+	err = api.DecodeInto([]byte(resp.Node.Value), &pod)
 	expectNoError(t, err)
 	if pod.ID != "foo" {
 		t.Errorf("Unexpected pod: %#v %s", pod, resp.Node.Value)
 	}
-	var manifests []api.ContainerManifest
+	var manifests api.ContainerManifestList
 	resp, err = fakeClient.Get("/registry/hosts/machine/kubelet", false, false)
 	expectNoError(t, err)
-	err = json.Unmarshal([]byte(resp.Node.Value), &manifests)
-	if len(manifests) != 1 || manifests[0].ID != "foo" {
+	err = api.DecodeInto([]byte(resp.Node.Value), &manifests)
+	if len(manifests.Items) != 1 || manifests.Items[0].ID != "foo" {
 		t.Errorf("Unexpected manifest list: %#v", manifests)
 	}
 }
@@ -189,18 +190,20 @@ func TestEtcdCreatePodWithContainersNotFound(t *testing.T) {
 	})
 	expectNoError(t, err)
 	resp, err := fakeClient.Get("/registry/hosts/machine/pods/foo", false, false)
-	expectNoError(t, err)
+	if err != nil {
+		t.Fatalf("Unexpected error %v", err)
+	}
 	var pod api.Pod
-	err = json.Unmarshal([]byte(resp.Node.Value), &pod)
+	err = api.DecodeInto([]byte(resp.Node.Value), &pod)
 	expectNoError(t, err)
 	if pod.ID != "foo" {
 		t.Errorf("Unexpected pod: %#v %s", pod, resp.Node.Value)
 	}
-	var manifests []api.ContainerManifest
+	var manifests api.ContainerManifestList
 	resp, err = fakeClient.Get("/registry/hosts/machine/kubelet", false, false)
 	expectNoError(t, err)
-	err = json.Unmarshal([]byte(resp.Node.Value), &manifests)
-	if len(manifests) != 1 || manifests[0].ID != "foo" {
+	err = api.DecodeInto([]byte(resp.Node.Value), &manifests)
+	if len(manifests.Items) != 1 || manifests.Items[0].ID != "foo" {
 		t.Errorf("Unexpected manifest list: %#v", manifests)
 	}
 }
@@ -213,9 +216,9 @@ func TestEtcdCreatePodWithExistingContainers(t *testing.T) {
 		},
 		E: tools.EtcdErrorNotFound,
 	}
-	fakeClient.Set("/registry/hosts/machine/kubelet", util.MakeJSONString([]api.ContainerManifest{
-		{
-			ID: "bar",
+	fakeClient.Set("/registry/hosts/machine/kubelet", api.EncodeOrDie(api.ContainerManifestList{
+		Items: []api.ContainerManifest{
+			{ID: "bar"},
 		},
 	}), 0)
 	registry := MakeTestEtcdRegistry(fakeClient, []string{"machine"})
@@ -236,18 +239,20 @@ func TestEtcdCreatePodWithExistingContainers(t *testing.T) {
 	})
 	expectNoError(t, err)
 	resp, err := fakeClient.Get("/registry/hosts/machine/pods/foo", false, false)
-	expectNoError(t, err)
+	if err != nil {
+		t.Fatalf("Unexpected error %v", err)
+	}
 	var pod api.Pod
-	err = json.Unmarshal([]byte(resp.Node.Value), &pod)
+	err = api.DecodeInto([]byte(resp.Node.Value), &pod)
 	expectNoError(t, err)
 	if pod.ID != "foo" {
 		t.Errorf("Unexpected pod: %#v %s", pod, resp.Node.Value)
 	}
-	var manifests []api.ContainerManifest
+	var manifests api.ContainerManifestList
 	resp, err = fakeClient.Get("/registry/hosts/machine/kubelet", false, false)
 	expectNoError(t, err)
-	err = json.Unmarshal([]byte(resp.Node.Value), &manifests)
-	if len(manifests) != 2 || manifests[1].ID != "foo" {
+	err = api.DecodeInto([]byte(resp.Node.Value), &manifests)
+	if len(manifests.Items) != 2 || manifests.Items[1].ID != "foo" {
 		t.Errorf("Unexpected manifest list: %#v", manifests)
 	}
 }
@@ -256,9 +261,9 @@ func TestEtcdDeletePod(t *testing.T) {
 	fakeClient := tools.MakeFakeEtcdClient(t)
 	key := "/registry/hosts/machine/pods/foo"
 	fakeClient.Set(key, util.MakeJSONString(api.Pod{JSONBase: api.JSONBase{ID: "foo"}}), 0)
-	fakeClient.Set("/registry/hosts/machine/kubelet", util.MakeJSONString([]api.ContainerManifest{
-		{
-			ID: "foo",
+	fakeClient.Set("/registry/hosts/machine/kubelet", api.EncodeOrDie(&api.ContainerManifestList{
+		Items: []api.ContainerManifest{
+			{ID: "foo"},
 		},
 	}), 0)
 	registry := MakeTestEtcdRegistry(fakeClient, []string{"machine"})
@@ -269,8 +274,13 @@ func TestEtcdDeletePod(t *testing.T) {
 	} else if fakeClient.DeletedKeys[0] != key {
 		t.Errorf("Unexpected key: %s, expected %s", fakeClient.DeletedKeys[0], key)
 	}
-	response, _ := fakeClient.Get("/registry/hosts/machine/kubelet", false, false)
-	if response.Node.Value != "[]" {
+	response, err := fakeClient.Get("/registry/hosts/machine/kubelet", false, false)
+	if err != nil {
+		t.Fatalf("Unexpected error %v", err)
+	}
+	var manifests api.ContainerManifestList
+	api.DecodeInto([]byte(response.Node.Value), &manifests)
+	if len(manifests.Items) != 0 {
 		t.Errorf("Unexpected container set: %s, expected empty", response.Node.Value)
 	}
 }
@@ -279,9 +289,11 @@ func TestEtcdDeletePodMultipleContainers(t *testing.T) {
 	fakeClient := tools.MakeFakeEtcdClient(t)
 	key := "/registry/hosts/machine/pods/foo"
 	fakeClient.Set(key, util.MakeJSONString(api.Pod{JSONBase: api.JSONBase{ID: "foo"}}), 0)
-	fakeClient.Set("/registry/hosts/machine/kubelet", util.MakeJSONString([]api.ContainerManifest{
-		{ID: "foo"},
-		{ID: "bar"},
+	fakeClient.Set("/registry/hosts/machine/kubelet", api.EncodeOrDie(&api.ContainerManifestList{
+		Items: []api.ContainerManifest{
+			{ID: "foo"},
+			{ID: "bar"},
+		},
 	}), 0)
 	registry := MakeTestEtcdRegistry(fakeClient, []string{"machine"})
 	err := registry.DeletePod("foo")
@@ -292,13 +304,16 @@ func TestEtcdDeletePodMultipleContainers(t *testing.T) {
 	if fakeClient.DeletedKeys[0] != key {
 		t.Errorf("Unexpected key: %s, expected %s", fakeClient.DeletedKeys[0], key)
 	}
-	response, _ := fakeClient.Get("/registry/hosts/machine/kubelet", false, false)
-	var manifests []api.ContainerManifest
-	json.Unmarshal([]byte(response.Node.Value), &manifests)
-	if len(manifests) != 1 {
-		t.Errorf("Unexpected manifest set: %#v, expected empty", manifests)
+	response, err := fakeClient.Get("/registry/hosts/machine/kubelet", false, false)
+	if err != nil {
+		t.Fatalf("Unexpected error %v", err)
 	}
-	if manifests[0].ID != "bar" {
+	var manifests api.ContainerManifestList
+	api.DecodeInto([]byte(response.Node.Value), &manifests)
+	if len(manifests.Items) != 1 {
+		t.Fatalf("Unexpected manifest set: %#v, expected empty", manifests)
+	}
+	if manifests.Items[0].ID != "bar" {
 		t.Errorf("Deleted wrong manifest: %#v", manifests)
 	}
 }
@@ -476,9 +491,11 @@ func TestEtcdCreateController(t *testing.T) {
 	})
 	expectNoError(t, err)
 	resp, err := fakeClient.Get("/registry/controllers/foo", false, false)
-	expectNoError(t, err)
+	if err != nil {
+		t.Fatalf("Unexpected error %v", err)
+	}
 	var ctrl api.ReplicationController
-	err = json.Unmarshal([]byte(resp.Node.Value), &ctrl)
+	err = api.DecodeInto([]byte(resp.Node.Value), &ctrl)
 	expectNoError(t, err)
 	if ctrl.ID != "foo" {
 		t.Errorf("Unexpected pod: %#v %s", ctrl, resp.Node.Value)
@@ -544,7 +561,7 @@ func TestEtcdCreateService(t *testing.T) {
 	resp, err := fakeClient.Get("/registry/services/specs/foo", false, false)
 	expectNoError(t, err)
 	var service api.Service
-	err = json.Unmarshal([]byte(resp.Node.Value), &service)
+	err = api.DecodeInto([]byte(resp.Node.Value), &service)
 	expectNoError(t, err)
 	if service.ID != "foo" {
 		t.Errorf("Unexpected service: %#v %s", service, resp.Node.Value)
@@ -621,15 +638,17 @@ func TestEtcdUpdateEndpoints(t *testing.T) {
 	fakeClient := tools.MakeFakeEtcdClient(t)
 	registry := MakeTestEtcdRegistry(fakeClient, []string{"machine"})
 	endpoints := api.Endpoints{
-		Name:      "foo",
+		JSONBase:  api.JSONBase{ID: "foo"},
 		Endpoints: []string{"baz", "bar"},
 	}
 	err := registry.UpdateEndpoints(endpoints)
 	expectNoError(t, err)
 	response, err := fakeClient.Get("/registry/services/endpoints/foo", false, false)
-	expectNoError(t, err)
+	if err != nil {
+		t.Fatalf("Unexpected error %v", err)
+	}
 	var endpointsOut api.Endpoints
-	err = json.Unmarshal([]byte(response.Node.Value), &endpointsOut)
+	err = api.DecodeInto([]byte(response.Node.Value), &endpointsOut)
 	if !reflect.DeepEqual(endpoints, endpointsOut) {
 		t.Errorf("Unexpected endpoints: %#v, expected %#v", endpointsOut, endpoints)
 	}

pkg/tools/etcd_tools.go

@@ -112,7 +112,7 @@ func (h *EtcdHelper) ExtractList(key string, slicePtr interface{}) error {
 	v := pv.Elem()
 	for _, node := range nodes {
 		obj := reflect.New(v.Type().Elem())
-		err = json.Unmarshal([]byte(node.Value), obj.Interface())
+		err = api.DecodeInto([]byte(node.Value), obj.Interface())
 		if err != nil {
 			return err
 		}
@@ -146,9 +146,9 @@ func (h *EtcdHelper) bodyAndExtractObj(key string, objPtr interface{}, ignoreNot
 		return "", 0, fmt.Errorf("key '%v' found no nodes field: %#v", key, response)
 	}
 	body = response.Node.Value
-	err = json.Unmarshal([]byte(body), objPtr)
+	err = api.DecodeInto([]byte(body), objPtr)
 	if jsonBase, err := api.FindJSONBase(objPtr); err == nil {
-		jsonBase.ResourceVersion = response.Node.ModifiedIndex
+		jsonBase.SetResourceVersion(response.Node.ModifiedIndex)
 		// Note that err shadows the err returned below, so we won't
 		// return an error just because we failed to find a JSONBase.
 		// This is intentional.
@@ -159,7 +159,7 @@ func (h *EtcdHelper) bodyAndExtractObj(key string, objPtr interface{}, ignoreNot
 // SetObj marshals obj via json, and stores under key. Will do an
 // atomic update if obj's ResourceVersion field is set.
 func (h *EtcdHelper) SetObj(key string, obj interface{}) error {
-	data, err := json.Marshal(obj)
+	data, err := api.Encode(obj)
 	if err != nil {
 		return err
 	}

pkg/tools/etcd_tools_test.go

@@ -45,10 +45,6 @@ func TestIsNotFoundErr(t *testing.T) {
 	try(fmt.Errorf("some other kind of error"), false)
 }
 
-type testMarshalType struct {
-	ID string `json:"id"`
-}
-
 func TestExtractList(t *testing.T) {
 	fakeClient := MakeFakeEtcdClient(t)
 	fakeClient.Data["/some/key"] = EtcdResponseWithError{
@@ -68,12 +64,12 @@ func TestExtractList(t *testing.T) {
 			},
 		},
 	}
-	expect := []testMarshalType{
-		{"foo"},
-		{"bar"},
-		{"baz"},
+	expect := []api.Pod{
+		{JSONBase: api.JSONBase{ID: "foo"}},
+		{JSONBase: api.JSONBase{ID: "bar"}},
+		{JSONBase: api.JSONBase{ID: "baz"}},
 	}
-	var got []testMarshalType
+	var got []api.Pod
 	helper := EtcdHelper{fakeClient}
 	err := helper.ExtractList("/some/key", &got)
 	if err != nil {
@@ -86,10 +82,10 @@ func TestExtractList(t *testing.T) {
 
 func TestExtractObj(t *testing.T) {
 	fakeClient := MakeFakeEtcdClient(t)
-	expect := testMarshalType{ID: "foo"}
+	expect := api.Pod{JSONBase: api.JSONBase{ID: "foo"}}
 	fakeClient.Set("/some/key", util.MakeJSONString(expect), 0)
 	helper := EtcdHelper{fakeClient}
-	var got testMarshalType
+	var got api.Pod
 	err := helper.ExtractObj("/some/key", &got, false)
 	if err != nil {
 		t.Errorf("Unexpected error %#v", err)
@@ -123,7 +119,7 @@ func TestExtractObjNotFoundErr(t *testing.T) {
 	}
 	helper := EtcdHelper{fakeClient}
 	try := func(key string) {
-		var got testMarshalType
+		var got api.Pod
 		err := helper.ExtractObj(key, &got, false)
 		if err == nil {
 			t.Errorf("%s: wanted error but didn't get one", key)
@@ -140,14 +136,18 @@ func TestExtractObjNotFoundErr(t *testing.T) {
 }
 
 func TestSetObj(t *testing.T) {
-	obj := testMarshalType{ID: "foo"}
+	obj := api.Pod{JSONBase: api.JSONBase{ID: "foo"}}
 	fakeClient := MakeFakeEtcdClient(t)
 	helper := EtcdHelper{fakeClient}
 	err := helper.SetObj("/some/key", obj)
 	if err != nil {
 		t.Errorf("Unexpected error %#v", err)
 	}
-	expect := util.MakeJSONString(obj)
+	data, err := api.Encode(obj)
+	if err != nil {
+		t.Errorf("Unexpected error %#v", err)
+	}
+	expect := string(data)
 	got := fakeClient.Data["/some/key"].R.Node.Value
 	if expect != got {
 		t.Errorf("Wanted %v, got %v", expect, got)