k6¶

安装:

$ brew install k6
$ docker pull loadimpact/k6

说明:

1. 本地版只没有UI界面
2. cloud版不能调试本地接口 && 有请求限制 && Pro版收费

备注

注意k6有两个地方登录, 使用不同的用户体系. 一个是官网 https://k6.io 另一个是命令专用 https://app.k6.io

简单实例:

$ cat script.js
import http from 'k6/http';
import { sleep } from 'k6';

export default function() {   // 注: 这个函数是必须的
  http.get('http://test.k6.io');
  sleep(1);
}

使用:
$ k6 run script.js

Docker版使用:
$ docker run -i loadimpact/k6 run - <script.js


Adding more VUs:
$ k6 run --vus 10 --duration 30s script.js

code类型:

// init code

export default function( {
  // vu code
}

init code与vu code的区别:
init code每个vu只执行一次而vu code在测试时间段内一直运行

options字段:

import http from 'k6/http';
import { sleep } from 'k6';
export let options = {
  vus: 10,
  duration: '30s',
};
export default function() {
  http.get('http://test.k6.io');
  sleep(1);
}

等同于在命令行执行时增加:
--vus 10 and --duration 30s

Stages(up/down VUs):

import http from 'k6/http';
import { check, sleep } from 'k6';

export let options = {
  stages: [        // 这儿有3个阶段
    { duration: '30s', target: 20 },
    { duration: '1m30s', target: 10 },
    { duration: '20s', target: 0 },
  ],
};

export default function() {
  let res = http.get('https://httpbin.org/');
  check(res, { 'status was 200': r => r.status == 200 });
  sleep(1);
}

three execution modes:

Local: on your local machine or a CI server.
Cloud: on cloud infrastructure managed by k6 Cloud.
Clustered: on more than one machine managed by you. Not supported yet.(估计这个会是开源与商业版的区别)