117 lines
3.4 KiB
Go
117 lines
3.4 KiB
Go
package upstream
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import (
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"net/http"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promauto"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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)
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const (
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namespace = "gitlab_workhorse"
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httpSubsystem = "http"
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)
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func secondsDurationBuckets() []float64 {
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return []float64{
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0.005, /* 5ms */
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0.025, /* 25ms */
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0.1, /* 100ms */
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0.5, /* 500ms */
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1.0, /* 1s */
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10.0, /* 10s */
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30.0, /* 30s */
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60.0, /* 1m */
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300.0, /* 10m */
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}
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}
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func byteSizeBuckets() []float64 {
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return []float64{
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10,
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64,
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256,
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1024, /* 1kB */
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64 * 1024, /* 64kB */
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256 * 1024, /* 256kB */
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1024 * 1024, /* 1mB */
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64 * 1024 * 1024, /* 64mB */
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}
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}
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var (
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httpInFlightRequests = promauto.NewGauge(prometheus.GaugeOpts{
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Namespace: namespace,
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Subsystem: httpSubsystem,
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Name: "in_flight_requests",
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Help: "A gauge of requests currently being served by workhorse.",
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})
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httpRequestsTotal = promauto.NewCounterVec(
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prometheus.CounterOpts{
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Namespace: namespace,
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Subsystem: httpSubsystem,
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Name: "requests_total",
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Help: "A counter for requests to workhorse.",
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},
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[]string{"code", "method", "route"},
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)
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httpRequestDurationSeconds = promauto.NewHistogramVec(
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prometheus.HistogramOpts{
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Namespace: namespace,
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Subsystem: httpSubsystem,
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Name: "request_duration_seconds",
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Help: "A histogram of latencies for requests to workhorse.",
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Buckets: secondsDurationBuckets(),
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},
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[]string{"code", "method", "route"},
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)
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httpRequestSizeBytes = promauto.NewHistogramVec(
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prometheus.HistogramOpts{
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Namespace: namespace,
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Subsystem: httpSubsystem,
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Name: "request_size_bytes",
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Help: "A histogram of sizes of requests to workhorse.",
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Buckets: byteSizeBuckets(),
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},
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[]string{"code", "method", "route"},
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)
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httpResponseSizeBytes = promauto.NewHistogramVec(
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prometheus.HistogramOpts{
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Namespace: namespace,
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Subsystem: httpSubsystem,
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Name: "response_size_bytes",
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Help: "A histogram of response sizes for requests to workhorse.",
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Buckets: byteSizeBuckets(),
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},
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[]string{"code", "method", "route"},
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)
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httpTimeToWriteHeaderSeconds = promauto.NewHistogramVec(
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prometheus.HistogramOpts{
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Namespace: namespace,
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Subsystem: httpSubsystem,
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Name: "time_to_write_header_seconds",
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Help: "A histogram of request durations until the response headers are written.",
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Buckets: secondsDurationBuckets(),
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},
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[]string{"code", "method", "route"},
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)
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)
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func instrumentRoute(next http.Handler, method string, regexpStr string) http.Handler {
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handler := next
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handler = promhttp.InstrumentHandlerCounter(httpRequestsTotal.MustCurryWith(map[string]string{"route": regexpStr}), handler)
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handler = promhttp.InstrumentHandlerDuration(httpRequestDurationSeconds.MustCurryWith(map[string]string{"route": regexpStr}), handler)
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handler = promhttp.InstrumentHandlerInFlight(httpInFlightRequests, handler)
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handler = promhttp.InstrumentHandlerRequestSize(httpRequestSizeBytes.MustCurryWith(map[string]string{"route": regexpStr}), handler)
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handler = promhttp.InstrumentHandlerResponseSize(httpResponseSizeBytes.MustCurryWith(map[string]string{"route": regexpStr}), handler)
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handler = promhttp.InstrumentHandlerTimeToWriteHeader(httpTimeToWriteHeaderSeconds.MustCurryWith(map[string]string{"route": regexpStr}), handler)
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return handler
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}
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