envomer / stats

:chart_with_upwards_trend: Monitors Go MemStats + System stats such as Memory, Swap and CPU and sends via UDP anywhere you want for logging etc...

Package stats

Package stats allows for gathering of statistics regarding your Go application and system it is running on and sent them via UDP to a server where you can do whatever you wish to the stats; display, store in database or send off to a logging service.

We currently gather the following Go related information:

• of Garbabage collects

• Last Garbage Collection
• Last Garbage Collection Pause Duration
• Memory Allocated
• Memory Heap Allocated
• Memory Heap System Allocated
• Go version
• Number of goroutines
• HTTP request logging; when implemented via middleware

And the following System Information:

• Host Information; hostname, OS....
• CPU Information; type, model, # of cores...
• Total CPU Timings
• Per Core CPU Timings
• Memory + Swap Information

Installation

Use go get.

go get gopkg.in/go-playground/stats.v1

or to update

go get -u gopkg.in/go-playground/stats.v1

Then import the validator package into your own code.

import "gopkg.in/go-playground/stats.v1"

Example

Server

package main

import (
	"fmt"

	"gopkg.in/go-playground/stats.v1"
)

func main() {

	config := &stats.ServerConfig{
		Domain: "",
		Port:   3008,
		Debug:  false,
	}

	server, err := stats.NewServer(config)
	if err != nil {
		panic(err)
	}

	for stat := range server.Run() {

		// calculate CPU times
		// totalCPUTimes := stat.CalculateTotalCPUTimes()
		// perCoreCPUTimes := stat.CalculateCPUTimes()

		// Do whatever you want with the data
		// * Save to database
		// * Stream elsewhere
		// * Print to console
		//

		fmt.Println(stat)
	}
}

Client

package main

import (
	"fmt"
	"net/http"
	"runtime"

	"gopkg.in/go-playground/stats.v1"
)

var statsClient *stats.ClientStats

func main() {

	serverConfig := &stats.ServerConfig{
		Domain: "remoteserver",
		Port:   3008,
		Debug:  false,
	}

	clientConfig := &stats.ClientConfig{
		Domain:           "",
		Port:             3009,
		PollInterval:     1000,
		Debug:            false,
		LogHostInfo:      true,
		LogCPUInfo:       true,
		LogTotalCPUTimes: true,
		LogPerCPUTimes:   true,
		LogMemory:        true,
		LogGoMemory:      true,
	}

	client, err := stats.NewClient(clientConfig, serverConfig)
	if err != nil {
		panic(err)
	}

	go client.Run()

	// if you want to capture HTTP requests in a middleware you'll have
	// to have access to the client.
	// see below for middleware example
	statsClient = client
}

// LoggingRecoveryHandler ...
//
//
// Middleware example for capturing HTTP Request info
// NOTE: this is standard go middlware, but could be adapted to other types/styles easily
//
func LoggingRecoveryHandler(next http.Handler) http.Handler {

	fn := func(w http.ResponseWriter, r *http.Request) {

		// log incoming request
		logReq := statsClient.NewHTTPRequest(w, r)

		defer func() {
			if err := recover(); err != nil {
				trace := make([]byte, 1<<16)
				n := runtime.Stack(trace, true)

				// log failure
				logReq.Failure(fmt.Sprintf("%s\n%s", err, trace[:n]))

				http.Error(w, "Friendly error message", 500)
				return
			}
		}()

		next.ServeHTTP(logReq.Writer(), r)

		// log completion
		logReq.Complete()
	}

	return http.HandlerFunc(fn)
}

License

• MIT License, Copyright (c) 2015 Dean Karn
• BSD License
  • Copyright (c) 2014, WAKAYAMA Shirou
  • Copyright (c) 2009 The Go Authors. All rights reserved.
• BSD License, Copyright (c) 2010-2012 The w32 Authors. All rights reserved.