/
eventcommon.go
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/
eventcommon.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 event
import (
"log"
"github.com/kubernetes/dashboard/src/app/backend/resource/common"
"github.com/kubernetes/dashboard/src/app/backend/resource/dataselect"
"k8s.io/kubernetes/pkg/api"
client "k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
"k8s.io/kubernetes/pkg/fields"
"k8s.io/kubernetes/pkg/labels"
"k8s.io/kubernetes/pkg/types"
)
// GetEvents gets events associated to resource with given name.
func GetEvents(client client.Interface, namespace, resourceName string) ([]api.Event, error) {
fieldSelector, err := fields.ParseSelector("involvedObject.name=" + resourceName)
if err != nil {
return nil, err
}
channels := &common.ResourceChannels{
EventList: common.GetEventListChannelWithOptions(
client,
common.NewSameNamespaceQuery(namespace),
api.ListOptions{
LabelSelector: labels.Everything(),
FieldSelector: fieldSelector,
},
1),
}
eventList := <-channels.EventList.List
if err := <-channels.EventList.Error; err != nil {
return nil, err
}
return eventList.Items, nil
}
// GetPodsEvents gets pods events associated to resource targeted by given resource selector.
func GetPodsEvents(client client.Interface, namespace string, resourceSelector map[string]string) (
[]api.Event, error) {
channels := &common.ResourceChannels{
PodList: common.GetPodListChannelWithOptions(
client,
common.NewSameNamespaceQuery(namespace),
api.ListOptions{
LabelSelector: labels.SelectorFromSet(resourceSelector),
FieldSelector: fields.Everything(),
},
1),
EventList: common.GetEventListChannel(client, common.NewSameNamespaceQuery(namespace), 1),
}
podList := <-channels.PodList.List
if err := <-channels.PodList.Error; err != nil {
return nil, err
}
eventList := <-channels.EventList.List
if err := <-channels.EventList.Error; err != nil {
return nil, err
}
events := filterEventsByPodsUID(eventList.Items, podList.Items)
return events, nil
}
// GetNodeEvents gets events associated to node with given name.
func GetNodeEvents(client client.Interface, dsQuery *dataselect.DataSelectQuery, nodeName string) (*common.EventList, error) {
var eventList common.EventList
mc := client.Core().Nodes()
node, _ := mc.Get(nodeName)
if ref, err := api.GetReference(node); err == nil {
ref.UID = types.UID(ref.Name)
events, _ := client.Core().Events(api.NamespaceAll).Search(ref)
eventList = CreateEventList(events.Items, dsQuery)
} else {
log.Print(err)
}
return &eventList, nil
}
// GetNodeEvents gets events associated to node with given name.
func GetNamespaceEvents(client client.Interface, dsQuery *dataselect.DataSelectQuery, namespace string) (common.EventList, error) {
events, _ := client.Core().Events(namespace).List(api.ListOptions{
LabelSelector: labels.Everything(),
FieldSelector: fields.Everything(),
})
return CreateEventList(events.Items, dsQuery), nil
}
// Based on event Reason fills event Type in order to allow correct filtering by Type.
func FillEventsType(events []api.Event) []api.Event {
for i := range events {
if isFailedReason(events[i].Reason, FailedReasonPartials...) {
events[i].Type = api.EventTypeWarning
} else {
events[i].Type = api.EventTypeNormal
}
}
return events
}
// IsTypeFilled returns true if all given events type is filled, false otherwise.
// This is needed as some older versions of kubernetes do not have Type property filled.
func IsTypeFilled(events []api.Event) bool {
if len(events) == 0 {
return false
}
for _, event := range events {
if len(event.Type) == 0 {
return false
}
}
return true
}
// ToEvent converts event api Event to Event model object.
func ToEvent(event api.Event) common.Event {
result := common.Event{
ObjectMeta: common.NewObjectMeta(event.ObjectMeta),
TypeMeta: common.NewTypeMeta(common.ResourceKindEvent),
Message: event.Message,
SourceComponent: event.Source.Component,
SourceHost: event.Source.Host,
SubObject: event.InvolvedObject.FieldPath,
Count: event.Count,
FirstSeen: event.FirstTimestamp,
LastSeen: event.LastTimestamp,
Reason: event.Reason,
Type: event.Type,
}
return result
}
// CreateEventList converts array of api events to common EventList structure
func CreateEventList(events []api.Event, dsQuery *dataselect.DataSelectQuery) common.EventList {
eventList := common.EventList{
Events: make([]common.Event, 0),
ListMeta: common.ListMeta{TotalItems: len(events)},
}
events = fromCells(dataselect.GenericDataSelect(toCells(events), dsQuery))
for _, event := range events {
eventDetail := ToEvent(event)
eventList.Events = append(eventList.Events, eventDetail)
}
return eventList
}
// The code below allows to perform complex data section on []api.Event
type EventCell api.Event
func (self EventCell) 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 toCells(std []api.Event) []dataselect.DataCell {
cells := make([]dataselect.DataCell, len(std))
for i := range std {
cells[i] = EventCell(std[i])
}
return cells
}
func fromCells(cells []dataselect.DataCell) []api.Event {
std := make([]api.Event, len(cells))
for i := range std {
std[i] = api.Event(cells[i].(EventCell))
}
return std
}