github.com/luisguillenc/httphealth

httphealth

HTTPHealth provides a simple component that offers an http interface for health checking and monitoring using Prometheus.

Usage

package main

import (
	"errors"
	"log"
	"math/rand"
	"net"

	"github.com/sirupsen/logrus"

	"github.com/luisguillenc/httphealth"
	"github.com/luisguillenc/ipfilter"
)

func main() {
	//creates listener
	lis, err := net.Listen("tcp", "0.0.0.0:8081")
	if err != nil {
		log.Fatalf("listening: %v", err)
	}

	//constructs whitelist
	wl := ipfilter.Whitelist(
		[]string{"127.0.0.1", "192.168.1.0/24"},
	)

	//constructs logger
	logger := logrus.New()
	logger.SetLevel(logrus.DebugLevel)

	health := httphealth.New(
		&service{},
		httphealth.SetIPFilter(wl),   //sets ipfilter
		httphealth.SetLogger(logger), //sets logger
		httphealth.Metrics(true),     //enables prometheus metrics
	)
	health.Serve(lis)
}

type service struct{}

func (s service) Ping() error {
	if rand.Intn(10) > 8 {
		return errors.New("error in supervised")
	}
	return nil
}