"Gauge measuring number of persistent volume claim currently unbound",
		[]string{namespaceLabel}, nil,
		metrics.ALPHA, "")

	volumeOperationErrorsMetric = metrics.NewCounterVec(
		&metrics.CounterOpts{
			Name:           "volume_operation_total_errors",
			Help:           "Total volume operation errors",
			StabilityLevel: metrics.ALPHA,
		},
		[]string{"plugin_name", "operation_name"})

	kubeutil "k8s.io/kubernetes/pkg/kubelet/util"
	"k8s.io/utils/clock"
)

// ProberResults stores the cumulative number of a probe by result as prometheus metrics.
var ProberResults = metrics.NewCounterVec(
	&metrics.CounterOpts{
		Subsystem:      "prober",
		Name:           "probe_total",
		Help:           "Cumulative number of a liveness, readiness or startup probe for a container by result.",