var (
	// HTTPRequests tracks the number of the http requests received since the server started.
	HTTPRequests = prometheus.NewCounterVec(
		prometheus.CounterOpts{
			Subsystem: kubeletSubsystem,
			Name:      "http_requests_total",
			Help:      "Number of the http requests received since the server started",
		},

		[]string{"method", "path", "server_type", "long_running"},
	)
	// HTTPRequestsDuration tracks the duration in seconds to serve http requests.
	HTTPRequestsDuration = prometheus.NewHistogramVec(
		prometheus.HistogramOpts{
			Subsystem: kubeletSubsystem,
			Name:      "http_requests_duration_seconds",
			Help:      "Duration in seconds to serve http requests",

			Buckets: prometheus.DefBuckets,
		},
		[]string{"method", "path", "server_type", "long_running"},
	)
	// HTTPInflightRequests tracks the number of the inflight http requests.
	HTTPInflightRequests = prometheus.NewGaugeVec(
		prometheus.GaugeOpts{
			Subsystem: kubeletSubsystem,
			Name:      "http_inflight_requests",
			Help:      "Number of the inflight http requests",
		},
		[]string{"method", "path", "server_type", "long_running"},
	)
)