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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 replicationcontroller
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"
"k8s.io/api/core/v1"
client "k8s.io/client-go/kubernetes"
)
// ReplicationControllerList contains a list of Replication Controllers in the cluster.
type ReplicationControllerList struct {
ListMeta api.ListMeta `json:"listMeta"`
CumulativeMetrics []metricapi.Metric `json:"cumulativeMetrics"`
// Basic information about resources status on the list.
Status common.ResourceStatus `json:"status"`
// Unordered list of Replication Controllers.
ReplicationControllers []ReplicationController `json:"replicationControllers"`
// List of non-critical errors, that occurred during resource retrieval.
Errors []error `json:"errors"`
}
// GetReplicationControllerList returns a list of all Replication Controllers in the cluster.
func GetReplicationControllerList(client client.Interface, nsQuery *common.NamespaceQuery,
dsQuery *dataselect.DataSelectQuery, metricClient metricapi.MetricClient) (*ReplicationControllerList, error) {
log.Print("Getting list of all replication controllers in the cluster")
channels := &common.ResourceChannels{
ReplicationControllerList: common.GetReplicationControllerListChannel(client, nsQuery, 1),
PodList: common.GetPodListChannel(client, nsQuery, 1),
EventList: common.GetEventListChannel(client, nsQuery, 1),
}
return GetReplicationControllerListFromChannels(channels, dsQuery, metricClient)
}
// GetReplicationControllerListFromChannels returns a list of all Replication Controllers in the cluster
// reading required resource list once from the channels.
func GetReplicationControllerListFromChannels(channels *common.ResourceChannels, dsQuery *dataselect.DataSelectQuery,
metricClient metricapi.MetricClient) (*ReplicationControllerList, error) {
rcList := <-channels.ReplicationControllerList.List
err := <-channels.ReplicationControllerList.Error
nonCriticalErrors, criticalError := errors.HandleError(err)
if criticalError != nil {
return nil, criticalError
}
podList := <-channels.PodList.List
err = <-channels.PodList.Error
nonCriticalErrors, criticalError = errors.AppendError(err, nonCriticalErrors)
if criticalError != nil {
return nil, criticalError
}
eventList := <-channels.EventList.List
err = <-channels.EventList.Error
nonCriticalErrors, criticalError = errors.AppendError(err, nonCriticalErrors)
if criticalError != nil {
return nil, criticalError
}
rcs := toReplicationControllerList(rcList.Items, dsQuery, podList.Items, eventList.Items, nonCriticalErrors,
metricClient)
rcs.Status = getStatus(rcList, podList.Items, eventList.Items)
return rcs, nil
}
func toReplicationControllerList(replicationControllers []v1.ReplicationController, dsQuery *dataselect.DataSelectQuery,
pods []v1.Pod, events []v1.Event, nonCriticalErrors []error, metricClient metricapi.MetricClient) *ReplicationControllerList {
rcList := &ReplicationControllerList{
ReplicationControllers: make([]ReplicationController, 0),
ListMeta: api.ListMeta{TotalItems: len(replicationControllers)},
Errors: nonCriticalErrors,
}
cachedResources := &metricapi.CachedResources{
Pods: pods,
}
rcCells, metricPromises, filteredTotal := dataselect.GenericDataSelectWithFilterAndMetrics(
toCells(replicationControllers), dsQuery, cachedResources, metricClient)
replicationControllers = fromCells(rcCells)
rcList.ListMeta = api.ListMeta{TotalItems: filteredTotal}
for _, rc := range replicationControllers {
matchingPods := common.FilterPodsByControllerRef(&rc, pods)
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([]metricapi.Metric, 0)
}
return rcList
}