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petsetlist.go
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petsetlist.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 petset
import (
"log"
"github.com/kubernetes/dashboard/src/app/backend/resource/common"
"github.com/kubernetes/dashboard/src/app/backend/resource/event"
"k8s.io/kubernetes/pkg/api"
k8serrors "k8s.io/kubernetes/pkg/api/errors"
"k8s.io/kubernetes/pkg/apis/apps"
client "k8s.io/kubernetes/pkg/client/unversioned"
"github.com/kubernetes/dashboard/src/app/backend/resource/dataselect"
)
// PetSetList contains a list of Pet Sets in the cluster.
type PetSetList struct {
ListMeta common.ListMeta `json:"listMeta"`
// Unordered list of Pet Sets.
PetSets []PetSet `json:"petSets"`
}
// PetSet is a presentation layer view of Kubernetes Pet Set resource. This means it is Pet Set
// plus additional augumented data we can get from other sources (like services that target the
// same pods).
type PetSet struct {
ObjectMeta common.ObjectMeta `json:"objectMeta"`
TypeMeta common.TypeMeta `json:"typeMeta"`
// Aggregate information about pods belonging to this Pet Set.
Pods common.PodInfo `json:"pods"`
// Container images of the Pet Set.
ContainerImages []string `json:"containerImages"`
}
// GetPetSetList returns a list of all Pet Sets in the cluster.
func GetPetSetList(client *client.Client, nsQuery *common.NamespaceQuery,
dsQuery *dataselect.DataSelectQuery) (*PetSetList, error) {
log.Printf("Getting list of all pet sets in the cluster")
channels := &common.ResourceChannels{
PetSetList: common.GetPetSetListChannel(client.Apps(), nsQuery, 1),
PodList: common.GetPodListChannel(client, nsQuery, 1),
EventList: common.GetEventListChannel(client, nsQuery, 1),
}
return GetPetSetListFromChannels(channels, dsQuery)
}
// GetPetSetListFromChannels returns a list of all Pet Sets in the cluster
// reading required resource list once from the channels.
func GetPetSetListFromChannels(channels *common.ResourceChannels, dsQuery *dataselect.DataSelectQuery) (
*PetSetList, error) {
petSets := <-channels.PetSetList.List
if err := <-channels.PetSetList.Error; err != nil {
statusErr, ok := err.(*k8serrors.StatusError)
if ok && statusErr.ErrStatus.Reason == "NotFound" {
// NotFound - this means that the server does not support Pet Set objects, which
// is fine.
emptyList := &PetSetList{
PetSets: make([]PetSet, 0),
}
return emptyList, nil
}
return nil, err
}
pods := <-channels.PodList.List
if err := <-channels.PodList.Error; err != nil {
return nil, err
}
events := <-channels.EventList.List
if err := <-channels.EventList.Error; err != nil {
return nil, err
}
return CreatePetSetList(petSets.Items, pods.Items, events.Items, dsQuery), nil
}
// CreatePetSetList creates paginated list of Pet Set model
// objects based on Kubernetes Pet Set objects array and related resources arrays.
func CreatePetSetList(petSets []apps.PetSet, pods []api.Pod, events []api.Event,
dsQuery *dataselect.DataSelectQuery) *PetSetList {
petSetList := &PetSetList{
PetSets: make([]PetSet, 0),
ListMeta: common.ListMeta{TotalItems: len(petSets)},
}
petSets = fromCells(dataselect.GenericDataSelect(toCells(petSets), dsQuery))
for _, petSet := range petSets {
matchingPods := common.FilterNamespacedPodsBySelector(pods, petSet.ObjectMeta.Namespace,
petSet.Spec.Selector.MatchLabels)
// TODO(floreks): Conversion should be omitted when client type will be updated
podInfo := common.GetPodInfo(int32(petSet.Status.Replicas), int32(petSet.Spec.Replicas),
matchingPods)
podInfo.Warnings = event.GetPodsEventWarnings(events, matchingPods)
petSetList.PetSets = append(petSetList.PetSets, ToPetSet(&petSet, &podInfo))
}
return petSetList
}
// ToPetSet transforms pet set into PetSet object returned by API.
func ToPetSet(petSet *apps.PetSet, podInfo *common.PodInfo) PetSet {
return PetSet{
ObjectMeta: common.NewObjectMeta(petSet.ObjectMeta),
TypeMeta: common.NewTypeMeta(common.ResourceKindPetSet),
ContainerImages: common.GetContainerImages(&petSet.Spec.Template.Spec),
Pods: *podInfo,
}
}