【locust】使用locust + boomer实现对接口的压测

背景

很早以前，考虑单机执行能力，使用locust作过公司短信网关的压测工做，后来发现了一个golang版本的locust，性能是python版本的5到10倍以上，可是一直没有机会使用。

最近公司想作一个性能测试平台，技术选型要求和开发的语言一致，即golang，因此我想到了boomer，本文为boomer的使用记录。

环境安装

开发环境	安装
Python 3.7	略
locust 0.11.0	pip install locustio
golang	略
boomer	go get github.com/myzhan/boomer

注：最新版本的boomer兼容了goczmq，须要将locust升级到较高版本才能完成兼容。

脚本编写

master

这部分的代码不重要，只要能启动就行。

from locust import Locust, TaskSet, task


class MyTaskSet(TaskSet):
    @task(20)
    def hello(self):
        pass


class Dummy(Locust):
    task_set = MyTaskSet

slave节点（golang/boomer）

package main

import (
	"bytes"
	"encoding/json"
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
	"time"

	"github.com/myzhan/boomer"
)

func getDemo() {
	start := time.Now()
	resp, err := http.Get("http://httpbin.org/get?name=Detector")

	if err != nil {
		log.Println(err)
		return
	}
	defer resp.Body.Close()
	fmt.Println(resp.Status)
	elapsed := time.Since(start)
	if resp.Status == "200 OK" {
		boomer.RecordSuccess("http", "sostreq", elapsed.Nanoseconds()/int64(time.Millisecond), int64(10))
	} else {
		boomer.RecordFailure("http", "sostreq", elapsed.Nanoseconds()/int64(time.Millisecond), "sostreq not equal")
	}
}

func postDemo() {
	start := time.Now()

	info := make(map[string]interface{})
	info["name"] = "Detector"
	info["age"] = 15
	info["loc"] = "深圳"
	// 将map解析未[]byte类型
	bytesData, _ := json.Marshal(info)
	// 将解析以后的数据转为*Reader类型
	reader := bytes.NewReader(bytesData)
	resp, _ := http.Post("http://httpbin.org/post",
		"application/json",
		reader)
	body, _ := ioutil.ReadAll(resp.Body)
	fmt.Println(string(body))
	elapsed := time.Since(start)
	if resp.Status == "200 OK" {
		boomer.RecordSuccess("http", "sostreq", elapsed.Nanoseconds()/int64(time.Millisecond), int64(10))
	} else {
		boomer.RecordFailure("http", "sostreq", elapsed.Nanoseconds()/int64(time.Millisecond), "sostreq not equal")
	}
}

func main() {
	task1 := &boomer.Task{
		Name: "sostreq",
		// The weight is used to distribute goroutines over multiple tasks.
		Weight: 20,
		Fn:     getDemo,
	}

	task2 := &boomer.Task{
		Name: "sostreq",
		// The weight is used to distribute goroutines over multiple tasks.
		Weight: 10,
		Fn:     postDemo,
	}
	boomer.Run(task1, task2)
}

实际效果以下：

问题

Failed to execute dot. Is Graphviz installed? Error: exec: "dot": executable file not found in $PATH