http

var (
	DurationSeconds = prometheus.NewHistogramVec(
		prometheus.HistogramOpts{
			Namespace: namespace,
			Subsystem: subsystem,
			Name:      "duration_seconds",
			Help:      "The invocation duration in seconds.",
		},
		[]string{
			"request_uri",
		},
	)

	RequestsTotal = prometheus.NewCounterVec(
		prometheus.CounterOpts{
			Namespace: namespace,
			Subsystem: subsystem,
			Name:      "requests_total",
			Help:      "The number of requests.",
		},
		[]string{
			"request_uri",
			"method",
		},
	)

	ResponsesTotal = prometheus.NewCounterVec(
		prometheus.CounterOpts{
			Namespace: namespace,
			Subsystem: subsystem,
			Name:      "responses_total",
			Help:      "The number of responses.",
		},
		[]string{
			"request_uri",
			"status",
		},
	)

	RequestsBytesTotal = prometheus.NewCounterVec(
		prometheus.CounterOpts{
			Namespace: namespace,
			Subsystem: subsystem,
			Name:      "requests_bytes_total",
			Help:      "A summary of the invocation requests bytes.",
		},
		[]string{
			"request_uri",
			"method",
		},
	)

	ResponsesBytesTotal = prometheus.NewCounterVec(
		prometheus.CounterOpts{
			Namespace: namespace,
			Subsystem: subsystem,
			Name:      "responses_bytes_total",
			Help:      "A summary of the invocation responses bytes.",
		},
		[]string{
			"request_uri",
			"method",
		},
	)
)