Gin Web Framework Prometheus metrics exporter
$ go get github.com/banzaicloud/go-gin-prometheus
package main
import (
"github.com/gin-gonic/gin"
"github.com/banzaicloud/go-gin-prometheus"
)
func main() {
r := gin.New()
p := ginprometheus.NewPrometheus("gin", []string{})
p.SetListenAddress(":9900")
p.Use(r, "/metrics")
r.GET("/", func(c *gin.Context) {
c.JSON(200, "Hello world!")
})
r.Run(":29090")
}The request counter (requests_total) has a url label which,
although desirable, can become problematic in cases where your
application uses templated routes expecting a great number of
variations, as Prometheus explicitly recommends against metrics having
high cardinality dimensions:
https://prometheus.io/docs/practices/naming/#labels
If you have for instance a /customer/:name templated route and you
want to generate a time series for every possible customer name:
package main
import (
"github.com/gin-gonic/gin"
"github.com/banzaicloud/go-gin-prometheus"
)
func main() {
r := gin.New()
p := ginprometheus.NewPrometheus("gin", []string{"name"})
p.SetListenAddress(":9900")
p.Use(r, "/metrics")
r.GET("/", func(c *gin.Context) {
c.JSON(200, "Hello world!")
})
r.Run(":29090")
}
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