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101 lines
3.7 KiB
Go
101 lines
3.7 KiB
Go
/*
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Copyright 2014 Google Inc. All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package controller
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import (
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"fmt"
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"strconv"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api/validation"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/fields"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/labels"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/registry/generic"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/runtime"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/util/fielderrors"
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)
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// rcStrategy implements verification logic for Replication Controllers.
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type rcStrategy struct {
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runtime.ObjectTyper
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api.NameGenerator
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}
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// Strategy is the default logic that applies when creating and updating Replication Controller objects.
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var Strategy = rcStrategy{api.Scheme, api.SimpleNameGenerator}
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// NamespaceScoped returns true because all Replication Controllers need to be within a namespace.
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func (rcStrategy) NamespaceScoped() bool {
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return true
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}
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// PrepareForCreate clears the status of a replication controller before creation.
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func (rcStrategy) PrepareForCreate(obj runtime.Object) {
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controller := obj.(*api.ReplicationController)
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controller.Status = api.ReplicationControllerStatus{}
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}
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// PrepareForUpdate clears fields that are not allowed to be set by end users on update.
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func (rcStrategy) PrepareForUpdate(obj, old runtime.Object) {
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// TODO: once RC has a status sub-resource we can enable this.
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//newController := obj.(*api.ReplicationController)
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//oldController := old.(*api.ReplicationController)
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//newController.Status = oldController.Status
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}
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// Validate validates a new replication controller.
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func (rcStrategy) Validate(ctx api.Context, obj runtime.Object) fielderrors.ValidationErrorList {
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controller := obj.(*api.ReplicationController)
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return validation.ValidateReplicationController(controller)
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}
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// AllowCreateOnUpdate is false for replication controllers; this means a POST is
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// needed to create one.
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func (rcStrategy) AllowCreateOnUpdate() bool {
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return false
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}
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// ValidateUpdate is the default update validation for an end user.
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func (rcStrategy) ValidateUpdate(ctx api.Context, obj, old runtime.Object) fielderrors.ValidationErrorList {
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return validation.ValidateReplicationControllerUpdate(old.(*api.ReplicationController), obj.(*api.ReplicationController))
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}
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// ControllerToSelectableFields returns a label set that represents the object.
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func ControllerToSelectableFields(controller *api.ReplicationController) fields.Set {
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return fields.Set{
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"metadata.name": controller.Name,
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"status.replicas": strconv.Itoa(controller.Status.Replicas),
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}
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}
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// MatchController is the filter used by the generic etcd backend to route
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// watch events from etcd to clients of the apiserver only interested in specific
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// labels/fields.
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func MatchController(label labels.Selector, field fields.Selector) generic.Matcher {
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return &generic.SelectionPredicate{
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Label: label,
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Field: field,
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GetAttrs: func(obj runtime.Object) (labels.Set, fields.Set, error) {
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rc, ok := obj.(*api.ReplicationController)
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if !ok {
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return nil, nil, fmt.Errorf("Given object is not a replication controller.")
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}
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return labels.Set(rc.ObjectMeta.Labels), ControllerToSelectableFields(rc), nil
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},
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}
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}
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