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replicationcontrollercommon.go
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/
replicationcontrollercommon.go
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// Copyright 2015 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 replicationcontroller
import (
"github.com/kubernetes/dashboard/src/app/backend/resource/common"
"github.com/kubernetes/dashboard/src/app/backend/resource/event"
"github.com/kubernetes/dashboard/src/app/backend/resource/pod"
resourceService "github.com/kubernetes/dashboard/src/app/backend/resource/service"
"k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/unversioned"
client "k8s.io/kubernetes/pkg/client/unversioned"
heapster "github.com/kubernetes/dashboard/src/app/backend/client"
"k8s.io/kubernetes/pkg/fields"
"k8s.io/kubernetes/pkg/labels"
"github.com/kubernetes/dashboard/src/app/backend/resource/dataselect"
"github.com/kubernetes/dashboard/src/app/backend/resource/metric"
)
// Transforms simple selector map to labels.Selector object that can be used when querying for
// object.
func toLabelSelector(selector map[string]string) (labels.Selector, error) {
labelSelector, err := unversioned.LabelSelectorAsSelector(&unversioned.LabelSelector{MatchLabels: selector})
if err != nil {
return nil, err
}
return labelSelector, nil
}
// Based on given selector returns list of services that are candidates for deletion.
// Services are matched by replication controllers' label selector. They are deleted if given
// label selector is targeting only 1 replication controller.
func getServicesForDeletion(client client.Interface, labelSelector labels.Selector,
namespace string) ([]api.Service, error) {
replicationControllers, err := client.ReplicationControllers(namespace).List(api.ListOptions{
LabelSelector: labelSelector,
FieldSelector: fields.Everything(),
})
if err != nil {
return nil, err
}
// if label selector is targeting only 1 replication controller
// then we can delete services targeted by this label selector,
// otherwise we can not delete any services so just return empty list
if len(replicationControllers.Items) != 1 {
return []api.Service{}, nil
}
services, err := client.Services(namespace).List(api.ListOptions{
LabelSelector: labelSelector,
FieldSelector: fields.Everything(),
})
if err != nil {
return nil, err
}
return services.Items, nil
}
// ToReplicationController converts replication controller api object to replication controller
// model object.
func ToReplicationController(replicationController *api.ReplicationController,
podInfo *common.PodInfo) ReplicationController {
return ReplicationController{
ObjectMeta: common.NewObjectMeta(replicationController.ObjectMeta),
TypeMeta: common.NewTypeMeta(common.ResourceKindReplicationController),
Pods: *podInfo,
ContainerImages: common.GetContainerImages(&replicationController.Spec.Template.Spec),
}
}
// ToReplicationControllerDetail converts replication controller api object to replication
// controller detail model object.
func ToReplicationControllerDetail(replicationController *api.ReplicationController,
podInfo common.PodInfo, podList pod.PodList, eventList common.EventList,
serviceList resourceService.ServiceList) ReplicationControllerDetail {
replicationControllerDetail := ReplicationControllerDetail{
ObjectMeta: common.NewObjectMeta(replicationController.ObjectMeta),
TypeMeta: common.NewTypeMeta(common.ResourceKindReplicationController),
LabelSelector: replicationController.Spec.Selector,
PodInfo: podInfo,
PodList: podList,
EventList: eventList,
ServiceList: serviceList,
ContainerImages: common.GetContainerImages(&replicationController.Spec.Template.Spec),
}
return replicationControllerDetail
}
// CreateReplicationControllerList creates paginated list of Replication Controller model
// objects based on Kubernetes Replication Controller objects array and related resources arrays.
func CreateReplicationControllerList(replicationControllers []api.ReplicationController,
dsQuery *dataselect.DataSelectQuery, pods []api.Pod, events []api.Event, heapsterClient *heapster.HeapsterClient) *ReplicationControllerList {
rcList := &ReplicationControllerList{
ReplicationControllers: make([]ReplicationController, 0),
ListMeta: common.ListMeta{TotalItems: len(replicationControllers)},
}
cachedResources := &dataselect.CachedResources{
Pods: pods,
}
replicationControllerCells, metricPromises := dataselect.GenericDataSelectWithMetrics(toCells(replicationControllers), dsQuery, cachedResources, heapsterClient)
replicationControllers = fromCells(replicationControllerCells)
for _, rc := range replicationControllers {
matchingPods := common.FilterNamespacedPodsBySelector(pods, rc.ObjectMeta.Namespace,
rc.Spec.Selector)
podInfo := common.GetPodInfo(rc.Status.Replicas, rc.Spec.Replicas, matchingPods)
podInfo.Warnings = event.GetPodsEventWarnings(events, matchingPods)
replicationController := ToReplicationController(&rc, &podInfo)
rcList.ReplicationControllers = append(rcList.ReplicationControllers, replicationController)
}
cumulativeMetrics, err := metricPromises.GetMetrics()
rcList.CumulativeMetrics = cumulativeMetrics
if err != nil {
rcList.CumulativeMetrics = make([]metric.Metric, 0)
}
return rcList
}
// The code below allows to perform complex data section on []api.ReplicationController
type ReplicationControllerCell api.ReplicationController
func (self ReplicationControllerCell) GetProperty(name dataselect.PropertyName) dataselect.ComparableValue {
switch name {
case dataselect.NameProperty:
return dataselect.StdComparableString(self.ObjectMeta.Name)
case dataselect.CreationTimestampProperty:
return dataselect.StdComparableTime(self.ObjectMeta.CreationTimestamp.Time)
case dataselect.NamespaceProperty:
return dataselect.StdComparableString(self.ObjectMeta.Namespace)
default:
// if name is not supported then just return a constant dummy value, sort will have no effect.
return nil
}
}
func (self ReplicationControllerCell) GetResourceSelector() *metric.ResourceSelector {
return &metric.ResourceSelector{
Namespace: self.ObjectMeta.Namespace,
ResourceType: common.ResourceKindReplicationController,
ResourceName: self.ObjectMeta.Name,
Selector: self.ObjectMeta.Labels,
}
}
func toCells(std []api.ReplicationController) []dataselect.DataCell {
cells := make([]dataselect.DataCell, len(std))
for i := range std {
cells[i] = ReplicationControllerCell(std[i])
}
return cells
}
func fromCells(cells []dataselect.DataCell) []api.ReplicationController {
std := make([]api.ReplicationController, len(cells))
for i := range std {
std[i] = api.ReplicationController(cells[i].(ReplicationControllerCell))
}
return std
}