stats

var (
	Durations = prometheus.NewSummaryVec(
		prometheus.SummaryOpts{
			Name:       "request_durations_seconds",
			Help:       "request latency distributions.",
			Objectives: map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.99: 0.001, 1.0: 0.0},
		},
		[]string{"stage"},
	)

	Attempts = prometheus.NewSummaryVec(
		prometheus.SummaryOpts{
			Name:       "attempts",
			Help:       "distributions of number of attempts made",
			Objectives: map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.99: 0.001, 1.0: 0.0},
		},
		[]string{},
	)

	CacheCounter = prometheus.NewCounterVec(
		prometheus.CounterOpts{
			Name: "cache",
			Help: "cache hit and misses",
		},
		[]string{"path", "cache"},
	)

	RequestCounter = prometheus.NewCounterVec(
		prometheus.CounterOpts{
			Name: "request",
			Help: "requests",
		},
		[]string{"host", "status"},
	)

	HealthGauge = prometheus.NewGaugeVec(
		prometheus.GaugeOpts{
			Name: "backends",
			Help: "number of healthy backends",
		},
		[]string{"backends"},
	)

	AvailableConnectionsGauge = prometheus.NewGaugeVec(
		prometheus.GaugeOpts{
			Name: "connections",
			Help: "number of available connections",
		},
		[]string{"connections"},
	)
)