}

// Check if logMetricsCollector implements necessary interface
var _ metrics.StableCollector = &logMetricsCollector{}

// NewLogMetricsCollector implements the metrics.StableCollector interface and
// exposes metrics about container's log volume size.
func NewLogMetricsCollector(podStats func(ctx context.Context) ([]statsapi.PodStats, error)) metrics.StableCollector {
	return &logMetricsCollector{
		podStats: podStats,
	}
}

func (kl *Kubelet) initializeModules() error {
	// Prometheus metrics.
	metrics.Register(
		collectors.NewVolumeStatsCollector(kl),
		collectors.NewLogMetricsCollector(kl.StatsProvider.ListPodStats),
	)
	metrics.SetNodeName(kl.nodeName)
	servermetrics.Register()

	// Setup filesystem directories.
	if err := kl.setupDataDirs(); err != nil {
		return err
	}