Go 如何使用gin作为服务器来编写prometheus exporter指标

这是普罗米修斯戈朗公司的官方客户示例：

package main

import (
    "log"
    "net/http"

    "github.com/prometheus/client_golang/prometheus"
    "github.com/prometheus/client_golang/prometheus/promhttp"
)

var cpuTemp = prometheus.NewGauge(prometheus.GaugeOpts{
        Name: "cpu_temperature_celsius",
        Help: "Current temperature of the CPU.",
    })


func init() {
    // Metrics have to be registered to be exposed:
    prometheus.MustRegister(cpuTemp)
}

func main() {
    cpuTemp.Set(65.3)

    // The Handler function provides a default handler to expose metrics
    // via an HTTP server. "/metrics" is the usual endpoint for that.
    http.Handle("/metrics", promhttp.Handler())
    log.Fatal(http.ListenAndServe(":8080", nil))
}

在这段代码中，http服务器使用

promhttp

库

---

如何在使用

gin

框架时修改度量处理程序？我没有在。

中找到答案，我们只是利用

promhttp

处理程序

package main

import (
    "github.com/gin-gonic/gin"
    "github.com/prometheus/client_golang/prometheus"
    "github.com/prometheus/client_golang/prometheus/promhttp"
)

var cpuTemp = prometheus.NewGauge(prometheus.GaugeOpts{
    Name: "cpu_temperature_celsius",
    Help: "Current temperature of the CPU.",
})

func init() {
    prometheus.MustRegister(cpuTemp)
}

func prometheusHandler() gin.HandlerFunc {
    h := promhttp.Handler()

    return func(c *gin.Context) {
        h.ServeHTTP(c.Writer, c.Request)
    }
}

func main() {
    cpuTemp.Set(65.3)

    r := gin.New()

    r.GET("/", func(c *gin.Context) {
        c.JSON(200, "Hello world!")
    })

    r.GET("/metrics", prometheusHandler())

    r.Run()
}

---

或者我们可以随时切换到Prometheus中间件-

我正在将Prometheus与其他库一起使用：

---

非常感谢你

package main

import (
    "github.com/Depado/ginprom"
    "github.com/gin-gonic/gin"
)

func main() {
    r := gin.Default()
    p := ginprom.New(
        ginprom.Engine(r),
        ginprom.Subsystem("gin"),
        ginprom.Path("/metrics"),
    )
    r.Use(p.Instrument())

    r.GET("/hello/:id", func(c *gin.Context) {})
    r.GET("/world/:id", func(c *gin.Context) {})
    r.Run("127.0.0.1:8080")
}