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@ -17,7 +17,7 @@ const metricNamespace = "rushlink"
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// metricURLsTotalGauge counts the number of requests that are handled by
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// the application, partitioned by status code and HTTP method.
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//
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// This counter is updated by throughout the application.
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// This counter is updated by the router.
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var metricRequestsTotalCounter = prometheus.NewCounterVec(
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prometheus.CounterOpts{
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Namespace: metricNamespace,
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@ -26,6 +26,27 @@ var metricRequestsTotalCounter = prometheus.NewCounterVec(
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Help: "How many HTTP requests processed, partitioned by status code and HTTP method.",
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}, []string{"code", "method"})
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// metricRequestsLatencyNanoSeconds keeps track of the request latencies for
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// each http request.
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//
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// This historogram is updated by the router.
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var metricRequestsLatencyNanoSeconds = prometheus.NewHistogramVec(
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prometheus.HistogramOpts{
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Namespace: metricNamespace,
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Subsystem: "http",
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Name: "request_duration_seconds",
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Buckets: []float64{
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float64(500e-6),
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float64(1e-3),
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float64(2e-3),
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float64(5e-3),
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float64(10e-3),
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float64(20e-3),
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float64(50e-3),
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},
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Help: "The latency of each HTTP request, partitioned by status code and HTTP method.",
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}, []string{"code", "method"})
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// metricURLsTotalGauge measures the amount of pastes stored in the database,
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// partitioned by type and state.
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//
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@ -41,6 +62,7 @@ var metricURLsTotalGauge = prometheus.NewGaugeVec(
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// StartMetricsServer starts sering Prometheus metrics exports on addr
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func StartMetricsServer(addr string, database *db.Database, fs *db.FileStore) {
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prometheus.MustRegister(metricRequestsTotalCounter)
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prometheus.MustRegister(metricRequestsLatencyNanoSeconds)
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prometheus.MustRegister(metricURLsTotalGauge)
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router := mux.NewRouter()
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