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list.go
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/
list.go
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// Copyright 2017 The Kubernetes Authors.
//
// 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 statefulset
import (
"log"
"github.com/kubernetes/dashboard/src/app/backend/api"
"github.com/kubernetes/dashboard/src/app/backend/errors"
metricapi "github.com/kubernetes/dashboard/src/app/backend/integration/metric/api"
"github.com/kubernetes/dashboard/src/app/backend/resource/common"
"github.com/kubernetes/dashboard/src/app/backend/resource/dataselect"
"github.com/kubernetes/dashboard/src/app/backend/resource/event"
apps "k8s.io/api/apps/v1beta2"
"k8s.io/api/core/v1"
"k8s.io/client-go/kubernetes"
)
// StatefulSetList contains a list of Stateful Sets in the cluster.
type StatefulSetList struct {
ListMeta api.ListMeta `json:"listMeta"`
// Basic information about resources status on the list.
Status common.ResourceStatus `json:"status"`
// Unordered list of Pet Sets.
StatefulSets []StatefulSet `json:"statefulSets"`
CumulativeMetrics []metricapi.Metric `json:"cumulativeMetrics"`
// List of non-critical errors, that occurred during resource retrieval.
Errors []error `json:"errors"`
}
// StatefulSet is a presentation layer view of Kubernetes Stateful Set resource. This means it is
// Stateful Set plus additional augmented data we can get from other sources (like services that
// target the same pods).
type StatefulSet struct {
ObjectMeta api.ObjectMeta `json:"objectMeta"`
TypeMeta api.TypeMeta `json:"typeMeta"`
// Aggregate information about pods belonging to this Pet Set.
Pods common.PodInfo `json:"pods"`
// Container images of the Stateful Set.
ContainerImages []string `json:"containerImages"`
// Init container images of the Stateful Set.
InitContainerImages []string `json:"initContainerImages"`
}
// GetStatefulSetList returns a list of all Stateful Sets in the cluster.
func GetStatefulSetList(client kubernetes.Interface, nsQuery *common.NamespaceQuery,
dsQuery *dataselect.DataSelectQuery, metricClient metricapi.MetricClient) (*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, metricClient)
}
// GetStatefulSetListFromChannels returns a list of all Stateful Sets in the cluster reading
// required resource list once from the channels.
func GetStatefulSetListFromChannels(channels *common.ResourceChannels, dsQuery *dataselect.DataSelectQuery,
metricClient metricapi.MetricClient) (*StatefulSetList, error) {
statefulSets := <-channels.StatefulSetList.List
err := <-channels.StatefulSetList.Error
nonCriticalErrors, criticalError := errors.HandleError(err)
if criticalError != nil {
return nil, criticalError
}
pods := <-channels.PodList.List
err = <-channels.PodList.Error
nonCriticalErrors, criticalError = errors.AppendError(err, nonCriticalErrors)
if criticalError != nil {
return nil, criticalError
}
events := <-channels.EventList.List
err = <-channels.EventList.Error
nonCriticalErrors, criticalError = errors.AppendError(err, nonCriticalErrors)
if criticalError != nil {
return nil, criticalError
}
ssList := toStatefulSetList(statefulSets.Items, pods.Items, events.Items, nonCriticalErrors, dsQuery, metricClient)
ssList.Status = getStatus(statefulSets, pods.Items, events.Items)
return ssList, nil
}
func toStatefulSetList(statefulSets []apps.StatefulSet, pods []v1.Pod, events []v1.Event, nonCriticalErrors []error,
dsQuery *dataselect.DataSelectQuery, metricClient metricapi.MetricClient) *StatefulSetList {
statefulSetList := &StatefulSetList{
StatefulSets: make([]StatefulSet, 0),
ListMeta: api.ListMeta{TotalItems: len(statefulSets)},
Errors: nonCriticalErrors,
}
cachedResources := &metricapi.CachedResources{
Pods: pods,
}
ssCells, metricPromises, filteredTotal := dataselect.GenericDataSelectWithFilterAndMetrics(
toCells(statefulSets), dsQuery, cachedResources, metricClient)
statefulSets = fromCells(ssCells)
statefulSetList.ListMeta = api.ListMeta{TotalItems: filteredTotal}
for _, statefulSet := range statefulSets {
matchingPods := common.FilterPodsByControllerRef(&statefulSet, pods)
podInfo := common.GetPodInfo(statefulSet.Status.Replicas, 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([]metricapi.Metric, 0)
}
return statefulSetList
}
func toStatefulSet(statefulSet *apps.StatefulSet, podInfo *common.PodInfo) StatefulSet {
return StatefulSet{
ObjectMeta: api.NewObjectMeta(statefulSet.ObjectMeta),
TypeMeta: api.NewTypeMeta(api.ResourceKindStatefulSet),
ContainerImages: common.GetContainerImages(&statefulSet.Spec.Template.Spec),
InitContainerImages: common.GetInitContainerImages(&statefulSet.Spec.Template.Spec),
Pods: *podInfo,
}
}