main.go

package main

import (
	"net/http"

	"github.com/labstack/echo-contrib/prometheus"
	"github.com/labstack/echo/v4"
)

func main() {
	e := echo.New()
	p := prometheus.NewPrometheus("test", nil)
	p.Use(e)
	e.GET("/", func(c echo.Context) error {
		return c.String(http.StatusOK, "Hello, World!")
	})
	e.Logger.Fatal(e.Start(":1323"))
}

metrics_sample.txt

# The following is a snippet of the output from the /metrics URL above, showing metrics generated for each URL.

# HELP test_request_duration_seconds The HTTP request latencies in seconds.
# TYPE test_request_duration_seconds histogram
test_request_duration_seconds_bucket{code="404",method="GET",url="/1",le="0.005"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/1",le="0.01"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/1",le="0.025"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/1",le="0.05"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/1",le="0.1"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/1",le="0.25"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/1",le="0.5"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/1",le="1"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/1",le="2.5"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/1",le="5"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/1",le="10"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/1",le="+Inf"} 1
test_request_duration_seconds_sum{code="404",method="GET",url="/1"} 1.1125e-05
test_request_duration_seconds_count{code="404",method="GET",url="/1"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/10",le="0.005"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/10",le="0.01"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/10",le="0.025"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/10",le="0.05"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/10",le="0.1"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/10",le="0.25"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/10",le="0.5"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/10",le="1"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/10",le="2.5"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/10",le="5"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/10",le="10"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/10",le="+Inf"} 1
test_request_duration_seconds_sum{code="404",method="GET",url="/10"} 2.167e-06
test_request_duration_seconds_count{code="404",method="GET",url="/10"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/100",le="0.005"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/100",le="0.01"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/100",le="0.025"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/100",le="0.05"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/100",le="0.1"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/100",le="0.25"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/100",le="0.5"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/100",le="1"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/100",le="2.5"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/100",le="5"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/100",le="10"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/100",le="+Inf"} 1
test_request_duration_seconds_sum{code="404",method="GET",url="/100"} 2.167e-06
test_request_duration_seconds_count{code="404",method="GET",url="/100"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/101",le="0.005"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/101",le="0.01"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/101",le="0.025"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/101",le="0.05"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/101",le="0.1"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/101",le="0.25"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/101",le="0.5"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/101",le="1"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/101",le="2.5"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/101",le="5"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/101",le="10"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/101",le="+Inf"} 1
test_request_duration_seconds_sum{code="404",method="GET",url="/101"} 2.375e-06
test_request_duration_seconds_count{code="404",method="GET",url="/101"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/102",le="0.005"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/102",le="0.01"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/102",le="0.025"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/102",le="0.05"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/102",le="0.1"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/102",le="0.25"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/102",le="0.5"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/102",le="1"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/102",le="2.5"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/102",le="5"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/102",le="10"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/102",le="+Inf"} 1
test_request_duration_seconds_sum{code="404",method="GET",url="/102"} 3.042e-06
test_request_duration_seconds_count{code="404",method="GET",url="/102"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/103",le="0.005"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/103",le="0.01"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/103",le="0.025"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/103",le="0.05"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/103",le="0.1"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/103",le="0.25"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/103",le="0.5"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/103",le="1"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/103",le="2.5"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/103",le="5"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/103",le="10"} 1
test_request_duration_seconds_bucket{code="404",method="GET",url="/103",le="+Inf"} 1

test.sh

# Start the server
go run main.go &

# How many metrics are there? (95)
curl localhost:1323/metrics | wc -l

# Generetae some 404's
seq 1 1000 | while read x; do curl localhost:1323/"$x"; done

# How many metrics? (Now 41103)
curl localhost:1323/metrics | wc -l