Healthcheck for go applications

This tool allows you to unlock the kubernetes feature Liveness and Readiness.

Features

• Logger to log failed probes
• Automatic, manual and background checks
• Respond with all healthchecks status in JSON format
• Callback for integrate with metrics or other systems
• Integrated web server

Quickstart

go get -u github.com/kazhuravlev/healthcheck

Check an examples.

package main

import (
	"context"
	"errors"
	"math/rand"
	"time"

	"github.com/kazhuravlev/healthcheck"
)

func main() {
	ctx := context.TODO()

	// 1. Init healthcheck instance. It will store all our checks.
	hc, _ := healthcheck.New()

	// 2. Register checks that will random respond with an error.
	hc.Register(ctx, healthcheck.NewBasic("redis", time.Second, func(ctx context.Context) error {
		if rand.Float64() > 0.5 {
			return errors.New("service is not available")
		}

		return nil
	}))

	// 3. Init and run a webserver for integration with Kubernetes.
	sysServer, _ := healthcheck.NewServer(hc, healthcheck.WithPort(8080))
	_ = sysServer.Run(ctx)

	// 4. Open http://localhost:8080/ready to check the status of your system
	select {}
}