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statefulsetlist.go
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/
statefulsetlist.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 statefulsetlist
import (
"log"
"github.com/kubernetes/dashboard/src/app/backend/resource/common"
"github.com/kubernetes/dashboard/src/app/backend/resource/event"
heapster "github.com/kubernetes/dashboard/src/app/backend/client"
"k8s.io/kubernetes/pkg/api"
k8serrors "k8s.io/kubernetes/pkg/api/errors"
"k8s.io/kubernetes/pkg/apis/apps"
client "k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
"github.com/kubernetes/dashboard/src/app/backend/resource/dataselect"
"github.com/kubernetes/dashboard/src/app/backend/resource/metric"
"github.com/kubernetes/dashboard/src/app/backend/resource/statefulset"
)
// StatefulSetList contains a list of Pet Sets in the cluster.
type StatefulSetList struct {
ListMeta common.ListMeta `json:"listMeta"`
// Unordered list of Pet Sets.
StatefulSets []StatefulSet `json:"statefulSets"`
CumulativeMetrics []metric.Metric `json:"cumulativeMetrics"`
}
// StatefulSet is a presentation layer view of Kubernetes Pet Set resource. This means it is Pet Set
// plus additional augmented data we can get from other sources (like services that target the
// same pods).
type StatefulSet 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"`
}
// GetStatefulSetList returns a list of all Pet Sets in the cluster.
func GetStatefulSetList(client *client.Clientset, nsQuery *common.NamespaceQuery,
dsQuery *dataselect.DataSelectQuery, heapsterClient *heapster.HeapsterClient) (*StatefulSetList, error) {
log.Print("Getting list of all pet sets in the cluster")
channels := &common.ResourceChannels{
StatefulSetList: common.GetStatefulSetListChannel(client, nsQuery, 1),
PodList: common.GetPodListChannel(client, nsQuery, 1),
EventList: common.GetEventListChannel(client, nsQuery, 1),
}
return GetStatefulSetListFromChannels(channels, dsQuery, heapsterClient)
}
// GetStatefulSetListFromChannels returns a list of all Pet Sets in the cluster
// reading required resource list once from the channels.
func GetStatefulSetListFromChannels(channels *common.ResourceChannels, dsQuery *dataselect.DataSelectQuery, heapsterClient *heapster.HeapsterClient) (
*StatefulSetList, error) {
statefulSets := <-channels.StatefulSetList.List
if err := <-channels.StatefulSetList.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 := &StatefulSetList{
StatefulSets: make([]StatefulSet, 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 CreateStatefulSetList(statefulSets.Items, pods.Items, events.Items, dsQuery, heapsterClient), nil
}
// CreateStatefulSetList creates paginated list of Pet Set model
// objects based on Kubernetes Pet Set objects array and related resources arrays.
func CreateStatefulSetList(statefulSets []apps.StatefulSet, pods []api.Pod, events []api.Event,
dsQuery *dataselect.DataSelectQuery, heapsterClient *heapster.HeapsterClient) *StatefulSetList {
statefulSetList := &StatefulSetList{
StatefulSets: make([]StatefulSet, 0),
ListMeta: common.ListMeta{TotalItems: len(statefulSets)},
}
cachedResources := &dataselect.CachedResources{
Pods: pods,
}
replicationControllerCells, metricPromises := dataselect.GenericDataSelectWithMetrics(statefulset.ToCells(statefulSets), dsQuery, cachedResources, heapsterClient)
statefulSets = statefulset.FromCells(replicationControllerCells)
for _, statefulSet := range statefulSets {
matchingPods := common.FilterNamespacedPodsBySelector(pods, statefulSet.ObjectMeta.Namespace,
statefulSet.Spec.Selector.MatchLabels)
// TODO(floreks): Conversion should be omitted when client type will be updated
podInfo := common.GetPodInfo(int32(statefulSet.Status.Replicas), int32(statefulSet.Spec.Replicas),
matchingPods)
podInfo.Warnings = event.GetPodsEventWarnings(events, matchingPods)
statefulSetList.StatefulSets = append(statefulSetList.StatefulSets, ToStatefulSet(&statefulSet, &podInfo))
}
cumulativeMetrics, err := metricPromises.GetMetrics()
statefulSetList.CumulativeMetrics = cumulativeMetrics
if err != nil {
statefulSetList.CumulativeMetrics = make([]metric.Metric, 0)
}
return statefulSetList
}
// ToStatefulSet transforms pet set into StatefulSet object returned by API.
func ToStatefulSet(statefulSet *apps.StatefulSet, podInfo *common.PodInfo) StatefulSet {
return StatefulSet{
ObjectMeta: common.NewObjectMeta(statefulSet.ObjectMeta),
TypeMeta: common.NewTypeMeta(common.ResourceKindStatefulSet),
ContainerImages: common.GetContainerImages(&statefulSet.Spec.Template.Spec),
Pods: *podInfo,
}
}