123 lines
3.0 KiB
Go
123 lines
3.0 KiB
Go
package metrics
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import (
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"github.com/prometheus/client_golang/prometheus"
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)
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var (
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metrics = newMetrics()
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)
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type Gauge interface {
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Inc()
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Dec()
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Add(float64)
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Set(float64)
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}
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type Counter interface {
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Inc()
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Add(float64)
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}
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type Observer interface {
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Observe(float64)
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}
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type Metrics struct {
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services prometheus.Gauge
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requests *prometheus.CounterVec
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requestsInFlight *prometheus.GaugeVec
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requestSeconds *prometheus.HistogramVec
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inputBytes *prometheus.CounterVec
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outputBytes *prometheus.CounterVec
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handlerErrors *prometheus.CounterVec
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}
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func newMetrics() *Metrics {
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m := &Metrics{
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services: prometheus.NewGauge(
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prometheus.GaugeOpts{
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Name: "gost_services",
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Help: "Current number of services",
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}),
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requests: prometheus.NewCounterVec(
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prometheus.CounterOpts{
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Name: "gost_service_requests_total",
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Help: "Total number of requests",
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},
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[]string{"service"}),
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requestsInFlight: prometheus.NewGaugeVec(
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prometheus.GaugeOpts{
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Name: "gost_service_requests_in_flight",
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Help: "Current in-flight requests",
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},
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[]string{"service"}),
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requestSeconds: prometheus.NewHistogramVec(
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prometheus.HistogramOpts{
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Name: "gost_service_request_duration_seconds",
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Help: "Distribution of request latencies",
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Buckets: []float64{
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.005, .01, .025, .05, .1, .25, .5, 1, 2.5, 5, 10, 15, 30, 60,
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},
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},
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[]string{"service"}),
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inputBytes: prometheus.NewCounterVec(
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prometheus.CounterOpts{
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Name: "gost_service_transfer_input_bytes_total",
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Help: "Total service input data transfer size in bytes",
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},
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[]string{"service"}),
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outputBytes: prometheus.NewCounterVec(
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prometheus.CounterOpts{
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Name: "gost_service_transfer_output_bytes_total",
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Help: "Total service output data transfer size in bytes",
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},
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[]string{"service"}),
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handlerErrors: prometheus.NewCounterVec(
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prometheus.CounterOpts{
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Name: "gost_service_handler_errors_total",
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Help: "Total service handler errors",
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},
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[]string{"service"}),
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}
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prometheus.MustRegister(m.services)
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prometheus.MustRegister(m.requests)
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prometheus.MustRegister(m.requestsInFlight)
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prometheus.MustRegister(m.requestSeconds)
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prometheus.MustRegister(m.inputBytes)
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prometheus.MustRegister(m.outputBytes)
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return m
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}
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func Services() Gauge {
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return metrics.services
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}
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func Requests(service string) Counter {
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return metrics.requests.With(prometheus.Labels{"service": service})
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}
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func RequestsInFlight(service string) Gauge {
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return metrics.requestsInFlight.With(prometheus.Labels{"service": service})
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}
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func RequestSeconds(service string) Observer {
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return metrics.requestSeconds.With(prometheus.Labels{"service": service})
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}
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func InputBytes(service string) Counter {
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return metrics.inputBytes.With(prometheus.Labels{"service": service})
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}
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func OutputBytes(service string) Counter {
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return metrics.outputBytes.With(prometheus.Labels{"service": service})
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}
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func HandlerErrors(service string) Counter {
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return metrics.handlerErrors.With(prometheus.Labels{"service": service})
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}
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