var ProberDuration = metrics.NewHistogramVec(
	&metrics.HistogramOpts{
		Subsystem:      "prober",
		Name:           "probe_duration_seconds",
		Help:           "Duration in seconds for a probe response.",
		StabilityLevel: metrics.ALPHA,
	},
	[]string{"probe_type",
		"container",
		"pod",
		"namespace"},
)

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.",
		StabilityLevel: metrics.ALPHA,
	},
	[]string{"probe_type",
		"result",
		"container",
		"pod",
		"namespace",
		"pod_uid"},
)

type Manager interface {
	// AddPod creates new probe workers for every container probe. This should be called for every
	// pod created.
	AddPod(pod *v1.Pod)

	// StopLivenessAndStartup handles stopping liveness and startup probes during termination.
	StopLivenessAndStartup(pod *v1.Pod)

	// RemovePod handles cleaning up the removed pod state, including terminating probe workers and
	// deleting cached results.
	RemovePod(pod *v1.Pod)

	// CleanupPods handles cleaning up pods which should no longer be running.
	// It takes a map of "desired pods" which should not be cleaned up.
	CleanupPods(desiredPods map[types.UID]sets.Empty)

	// UpdatePodStatus modifies the given PodStatus with the appropriate Ready state for each
	// container based on container running status, cached probe results and worker states.
	UpdatePodStatus(*v1.Pod, *v1.PodStatus)
}