func()

in manager/manager.go [1196:1255]

• 55 lines of code
• 8 McCabe index (conditional complexity)

func (m *manager) watchForNewOoms() error {
	klog.V(2).Infof("Started watching for new ooms in manager")
	outStream := make(chan *oomparser.OomInstance, 10)
	oomLog, err := oomparser.New()
	if err != nil {
		return err
	}
	go oomLog.StreamOoms(outStream)

	go func() {
		for oomInstance := range outStream {
			// Surface OOM and OOM kill events.
			newEvent := &info.Event{
				ContainerName: oomInstance.ContainerName,
				Timestamp:     oomInstance.TimeOfDeath,
				EventType:     info.EventOom,
			}
			err := m.eventHandler.AddEvent(newEvent)
			if err != nil {
				klog.Errorf("failed to add OOM event for %q: %v", oomInstance.ContainerName, err)
			}
			klog.V(3).Infof("Created an OOM event in container %q at %v", oomInstance.ContainerName, oomInstance.TimeOfDeath)

			newEvent = &info.Event{
				ContainerName: oomInstance.VictimContainerName,
				Timestamp:     oomInstance.TimeOfDeath,
				EventType:     info.EventOomKill,
				EventData: info.EventData{
					OomKill: &info.OomKillEventData{
						Pid:         oomInstance.Pid,
						ProcessName: oomInstance.ProcessName,
					},
				},
			}
			err = m.eventHandler.AddEvent(newEvent)
			if err != nil {
				klog.Errorf("failed to add OOM kill event for %q: %v", oomInstance.ContainerName, err)
			}

			// Count OOM events for later collection by prometheus
			request := v2.RequestOptions{
				IdType: v2.TypeName,
				Count:  1,
			}
			conts, err := m.getRequestedContainers(oomInstance.ContainerName, request)
			if err != nil {
				klog.V(2).Infof("failed getting container info for %q: %v", oomInstance.ContainerName, err)
				continue
			}
			if len(conts) != 1 {
				klog.V(2).Info("Expected the request to match only one container")
				continue
			}
			for _, cont := range conts {
				atomic.AddUint64(&cont.oomEvents, 1)
			}
		}
	}()
	return nil
}