62 lines
1.3 KiB
Go
62 lines
1.3 KiB
Go
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package main
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import (
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"log"
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"net/http"
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"strings"
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"github.com/gin-gonic/gin"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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)
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// TODO: more metrics
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var (
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_promRegistry *prometheus.Registry
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_promHttpHandler http.Handler
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opsProcessed = prometheus.NewCounter(prometheus.CounterOpts{
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Name: "processed_ops_total",
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Help: "The total number of processed requests",
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})
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labelStringReplacer *strings.Replacer = strings.NewReplacer(
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"\"", "",
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"'", "",
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)
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)
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func setupPrometheus(r *gin.Engine) {
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_promRegistry = prometheus.NewRegistry()
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_promRegistry.MustRegister(opsProcessed)
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_promHttpHandler = promhttp.HandlerFor(_promRegistry, promhttp.HandlerOpts{
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Registry: _promRegistry,
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EnableOpenMetrics: true,
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ErrorHandling: promhttp.ContinueOnError,
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ErrorLog: log.Default(),
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})
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r.GET("/metrics", promHttpHandler)
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r.GET("/metrics/", func(c *gin.Context) {
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c.Redirect(http.StatusMovedPermanently, "/metrics")
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})
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}
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func promSanitizeLabel(str string, fallback string) string {
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out := strings.ToValidUTF8(str, "")
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out = labelStringReplacer.Replace(out)
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out = strings.TrimSpace(out)
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if out == "" {
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return fallback
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}
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return out
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}
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func promHttpHandler(c *gin.Context) {
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opsProcessed.Inc()
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_promHttpHandler.ServeHTTP(c.Writer, c.Request)
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}
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