Add a limit range resource

pkg/registry/limitrange/doc.go

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+/*
+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 limitrange provides Registry interface and it's REST
+// implementation for storing LimitRange api objects.
+package limitrange

pkg/registry/limitrange/registry.go

@@ -0,0 +1,48 @@
+/*
+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 limitrange
+
+import (
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/registry/generic"
+	etcdgeneric "github.com/GoogleCloudPlatform/kubernetes/pkg/registry/generic/etcd"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/runtime"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/tools"
+)
+
+// registry implements custom changes to generic.Etcd.
+type registry struct {
+	*etcdgeneric.Etcd
+}
+
+// NewEtcdRegistry returns a registry which will store LimitRange in the given helper
+func NewEtcdRegistry(h tools.EtcdHelper) generic.Registry {
+	return registry{
+		Etcd: &etcdgeneric.Etcd{
+			NewFunc:      func() runtime.Object { return &api.LimitRange{} },
+			NewListFunc:  func() runtime.Object { return &api.LimitRangeList{} },
+			EndpointName: "limitranges",
+			KeyRootFunc: func(ctx api.Context) string {
+				return etcdgeneric.NamespaceKeyRootFunc(ctx, "/registry/limitranges")
+			},
+			KeyFunc: func(ctx api.Context, id string) (string, error) {
+				return etcdgeneric.NamespaceKeyFunc(ctx, "/registry/limitranges", id)
+			},
+			Helper: h,
+		},
+	}
+}

pkg/registry/limitrange/registry_test.go

@@ -0,0 +1,121 @@
+/*
+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 limitrange
+
+import (
+	"reflect"
+	"testing"
+
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api/errors"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api/resource"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api/testapi"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/registry/generic"
+	etcdgeneric "github.com/GoogleCloudPlatform/kubernetes/pkg/registry/generic/etcd"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/runtime"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/tools"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
+
+	"github.com/coreos/go-etcd/etcd"
+)
+
+func NewTestLimitRangeEtcdRegistry(t *testing.T) (*tools.FakeEtcdClient, generic.Registry) {
+	f := tools.NewFakeEtcdClient(t)
+	f.TestIndex = true
+	h := tools.EtcdHelper{f, testapi.Codec(), tools.RuntimeVersionAdapter{testapi.MetadataAccessor()}}
+	return f, NewEtcdRegistry(h)
+}
+
+func TestLimitRangeCreate(t *testing.T) {
+	limitRange := &api.LimitRange{
+		ObjectMeta: api.ObjectMeta{
+			Name:      "abc",
+			Namespace: "foo",
+		},
+		Spec: api.LimitRangeSpec{
+			Limits: []api.LimitRangeItem{
+				{
+					Kind: "pods",
+					Max: api.ResourceList{
+						api.ResourceCPU:    resource.MustParse("100"),
+						api.ResourceMemory: resource.MustParse("10000"),
+					},
+					Min: api.ResourceList{
+						api.ResourceCPU:    resource.MustParse("0"),
+						api.ResourceMemory: resource.MustParse("100"),
+					},
+				},
+			},
+		},
+	}
+
+	nodeWithLimitRange := tools.EtcdResponseWithError{
+		R: &etcd.Response{
+			Node: &etcd.Node{
+				Value:         runtime.EncodeOrDie(testapi.Codec(), limitRange),
+				ModifiedIndex: 1,
+				CreatedIndex:  1,
+			},
+		},
+		E: nil,
+	}
+
+	emptyNode := tools.EtcdResponseWithError{
+		R: &etcd.Response{},
+		E: tools.EtcdErrorNotFound,
+	}
+
+	ctx := api.NewDefaultContext()
+	key := "foo"
+	path, err := etcdgeneric.NamespaceKeyFunc(ctx, "/registry/limitranges", key)
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	table := map[string]struct {
+		existing tools.EtcdResponseWithError
+		expect   tools.EtcdResponseWithError
+		toCreate runtime.Object
+		errOK    func(error) bool
+	}{
+		"normal": {
+			existing: emptyNode,
+			expect:   nodeWithLimitRange,
+			toCreate: limitRange,
+			errOK:    func(err error) bool { return err == nil },
+		},
+		"preExisting": {
+			existing: nodeWithLimitRange,
+			expect:   nodeWithLimitRange,
+			toCreate: limitRange,
+			errOK:    errors.IsAlreadyExists,
+		},
+	}
+
+	for name, item := range table {
+		fakeClient, registry := NewTestLimitRangeEtcdRegistry(t)
+		fakeClient.Data[path] = item.existing
+		err := registry.Create(ctx, key, item.toCreate)
+		if !item.errOK(err) {
+			t.Errorf("%v: unexpected error: %v", name, err)
+		}
+
+		if e, a := item.expect, fakeClient.Data[path]; !reflect.DeepEqual(e, a) {
+			t.Errorf("%v:\n%s", name, util.ObjectDiff(e, a))
+		}
+	}
+}

pkg/registry/limitrange/rest.go

@@ -0,0 +1,159 @@
+/*
+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 limitrange
+
+import (
+	"fmt"
+
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api/errors"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api/validation"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/apiserver"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/labels"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/registry/generic"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/runtime"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/watch"
+)
+
+// REST provides the RESTStorage access patterns to work with LimitRange objects.
+type REST struct {
+	registry generic.Registry
+}
+
+// NewREST returns a new REST. You must use a registry created by
+// NewEtcdRegistry unless you're testing.
+func NewREST(registry generic.Registry) *REST {
+	return &REST{
+		registry: registry,
+	}
+}
+
+// Create a LimitRange object
+func (rs *REST) Create(ctx api.Context, obj runtime.Object) (<-chan apiserver.RESTResult, error) {
+	limitRange, ok := obj.(*api.LimitRange)
+	if !ok {
+		return nil, fmt.Errorf("invalid object type")
+	}
+
+	if !api.ValidNamespace(ctx, &limitRange.ObjectMeta) {
+		return nil, errors.NewConflict("limitRange", limitRange.Namespace, fmt.Errorf("LimitRange.Namespace does not match the provided context"))
+	}
+
+	if len(limitRange.Name) == 0 {
+		limitRange.Name = string(util.NewUUID())
+	}
+
+	if errs := validation.ValidateLimitRange(limitRange); len(errs) > 0 {
+		return nil, errors.NewInvalid("limitRange", limitRange.Name, errs)
+	}
+	api.FillObjectMetaSystemFields(ctx, &limitRange.ObjectMeta)
+
+	return apiserver.MakeAsync(func() (runtime.Object, error) {
+		err := rs.registry.Create(ctx, limitRange.Name, limitRange)
+		if err != nil {
+			return nil, err
+		}
+		return rs.registry.Get(ctx, limitRange.Name)
+	}), nil
+}
+
+// Update updates a LimitRange object.
+func (rs *REST) Update(ctx api.Context, obj runtime.Object) (<-chan apiserver.RESTResult, error) {
+	limitRange, ok := obj.(*api.LimitRange)
+	if !ok {
+		return nil, fmt.Errorf("invalid object type")
+	}
+
+	if !api.ValidNamespace(ctx, &limitRange.ObjectMeta) {
+		return nil, errors.NewConflict("limitRange", limitRange.Namespace, fmt.Errorf("LimitRange.Namespace does not match the provided context"))
+	}
+
+	oldObj, err := rs.registry.Get(ctx, limitRange.Name)
+	if err != nil {
+		return nil, err
+	}
+
+	editLimitRange := oldObj.(*api.LimitRange)
+
+	// set the editable fields on the existing object
+	editLimitRange.Labels = limitRange.Labels
+	editLimitRange.ResourceVersion = limitRange.ResourceVersion
+	editLimitRange.Annotations = limitRange.Annotations
+	editLimitRange.Spec = limitRange.Spec
+
+	if errs := validation.ValidateLimitRange(editLimitRange); len(errs) > 0 {
+		return nil, errors.NewInvalid("limitRange", editLimitRange.Name, errs)
+	}
+
+	return apiserver.MakeAsync(func() (runtime.Object, error) {
+		err := rs.registry.Update(ctx, editLimitRange.Name, editLimitRange)
+		if err != nil {
+			return nil, err
+		}
+		return rs.registry.Get(ctx, editLimitRange.Name)
+	}), nil
+}
+
+// Delete deletes the LimitRange with the specified name
+func (rs *REST) Delete(ctx api.Context, name string) (<-chan apiserver.RESTResult, error) {
+	obj, err := rs.registry.Get(ctx, name)
+	if err != nil {
+		return nil, err
+	}
+	_, ok := obj.(*api.LimitRange)
+	if !ok {
+		return nil, fmt.Errorf("invalid object type")
+	}
+	return apiserver.MakeAsync(func() (runtime.Object, error) {
+		return &api.Status{Status: api.StatusSuccess}, rs.registry.Delete(ctx, name)
+	}), nil
+}
+
+// Get gets a LimitRange with the specified name
+func (rs *REST) Get(ctx api.Context, name string) (runtime.Object, error) {
+	obj, err := rs.registry.Get(ctx, name)
+	if err != nil {
+		return nil, err
+	}
+	limitRange, ok := obj.(*api.LimitRange)
+	if !ok {
+		return nil, fmt.Errorf("invalid object type")
+	}
+	return limitRange, err
+}
+
+func (rs *REST) getAttrs(obj runtime.Object) (objLabels, objFields labels.Set, err error) {
+	return labels.Set{}, labels.Set{}, nil
+}
+
+func (rs *REST) List(ctx api.Context, label, field labels.Selector) (runtime.Object, error) {
+	return rs.registry.List(ctx, &generic.SelectionPredicate{label, field, rs.getAttrs})
+}
+
+func (rs *REST) Watch(ctx api.Context, label, field labels.Selector, resourceVersion string) (watch.Interface, error) {
+	return rs.registry.Watch(ctx, &generic.SelectionPredicate{label, field, rs.getAttrs}, resourceVersion)
+}
+
+// New returns a new api.LimitRange
+func (*REST) New() runtime.Object {
+	return &api.LimitRange{}
+}
+
+func (*REST) NewList() runtime.Object {
+	return &api.LimitRangeList{}
+}

pkg/registry/limitrange/rest_test.go

@@ -0,0 +1,17 @@
+/*
+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 limitrange