前言

最近學習python也想通過python中的locust模塊做性能測試，簡單介紹下。官方網站【https://www.locust.io/】

Locust is an easy-to-use, distributed, user load testing tool. It is intended for load-testing web sites (or other systems) and figuring out how many concurrent users a system can handle.

[Locust是一個易於使用，分佈式，用戶負載測試工具。它用於負載測試web站點(或其他系統)並計算一個系統可以處理多少並發用戶。]

The idea is that during a test, a swarm of locusts will attack your website. The behavior of each locust (or test user if you will) is defined by you and the swarming process is monitored from a web UI in real-time. This will help you battle test and identify bottlenecks in your code before letting real users in.

[在測試中，一群蝗蟲會攻擊你的網站。每個蝗蟲(或者測試用戶)的行為由您定義，集群過程由web UI實時監控。這將幫助您在讓真正的用戶進入之前進行測試並識別代碼中的瓶頸。]

Locust is completely event-based, and therefore it』s possible to support thousands of concurrent users on a single machine. In contrast to many other event-based apps it doesn』t use callbacks. Instead it uses light-weight processes, through gevent. Each locust swarming your site is actually running inside its own process (or greenlet, to be correct). This allows you to write very expressive scenarios in Python without complicating your code with callbacks.

[Locust完全是基於事件的，因此在一台機器上支持數千個並發用戶是可能的。與許多其他基於事件的應用程序不同，它不使用回調。相反，它通過gevent使用輕量級進程。每個聚集在你的站點上的蝗蟲實際上是在它自己的進程中運行的(或者說是greenlet)。這允許您用Python編寫非常有表現力的場景，而不用回調使代碼複雜化。]

幫助文檔【https://docs.locust.io/en/stable/what-is-locust.html】

安裝

前置條件本機安裝了python環境

pip install locustio

locust –help

Usage: locust [options] [LocustClass [LocustClass2 ... ]] Options: -h, --help show this help message and exit -H HOST, --host=HOST Host to load test in the following format: http://10.21.32.33 --web-host=WEB_HOST Host to bind the web interface to. Defaults to '' (all interfaces) -P PORT, --port=PORT, --web-port=PORT Port on which to run web host -f LOCUSTFILE, --locustfile=LOCUSTFILE Python module file to import, e.g. '../other.py'. Default: locustfile --csv=CSVFILEBASE, --csv-base-name=CSVFILEBASE Store current request stats to files in CSV format. --master Set locust to run in distributed mode with this process as master --slave Set locust to run in distributed mode with this process as slave --master-host=MASTER_HOST Host or IP address of locust master for distributed load testing. Only used when running with --slave. Defaults to 127.0.0.1. --master-port=MASTER_PORT The port to connect to that is used by the locust master for distributed load testing. Only used when running with --slave. Defaults to 5557. Note that slaves will also connect to the master node on this port + 1. --master-bind-host=MASTER_BIND_HOST Interfaces (hostname, ip) that locust master should bind to. Only used when running with --master. Defaults to * (all available interfaces). --master-bind-port=MASTER_BIND_PORT Port that locust master should bind to. Only used when running with --master. Defaults to 5557. Note that Locust will also use this port + 1, so by default the master node will bind to 5557 and 5558. --expect-slaves=EXPECT_SLAVES How many slaves master should expect to connect before starting the test (only when --no-web used). --no-web Disable the web interface, and instead start running the test immediately. Requires -c and -r to be specified. -c NUM_CLIENTS, --clients=NUM_CLIENTS Number of concurrent Locust users. Only used together with --no-web -r HATCH_RATE, --hatch-rate=HATCH_RATE The rate per second in which clients are spawned. Only used together with --no-web -t RUN_TIME, --run-time=RUN_TIME Stop after the specified amount of time, e.g. (300s, 20m, 3h, 1h30m, etc.). Only used together with --no- web -L LOGLEVEL, --loglevel=LOGLEVEL Choose between DEBUG/INFO/WARNING/ERROR/CRITICAL. Default is INFO. --logfile=LOGFILE Path to log file. If not set, log will go to stdout/stderr --print-stats Print stats in the console --only-summary Only print the summary stats --no-reset-stats [DEPRECATED] Do not reset statistics once hatching has been completed. This is now the default behavior. See --reset-stats to disable --reset-stats Reset statistics once hatching has been completed. Should be set on both master and slaves when running in distributed mode -l, --list Show list of possible locust classes and exit --show-task-ratio print table of the locust classes' task execution ratio --show-task-ratio-json print json data of the locust classes' task execution ratio -V, --version show program's version number and exit

前言快速上手demo

# -*- coding: utf-8 -*-# @Time    : 2019/12/31 20:24# @Author  : liwen# @Email   : www.7dtest.com# @File    : SevenLoust.py# coding:utf-8from locust import HttpLocust, TaskSet, task    # HttpLocust 這個類的作用是用來發送http請求的# TaskSet   這個類是定義用戶行為的，相當於loadrunnerhttp協議的腳本，jmeter裏面的http請求一樣，要去幹嘛的# task   這個task是一個裝飾器，它用來把一個函數，裝飾成一個任務，也可以指定他們的先後執行順序  class SevenLoust(TaskSet):    # 自己定義的類，繼承TaskSet，也就是這個類是實現咱們要去請求什麼的    '''打開7DGroup'''      @task(1)  # @task#用task裝飾器把這個函數裝飾成一個咱們要執行的性能任務    def open_7dtest(self):  # 這個函數裏面定義的是咱們要具體做的操作        # 定義requests的請求頭        header = {            "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.88 Safari/537.36"}          r = self.client.get("/", headers=header, verify=False)  # 請求這個url裏面的哪個路徑，        print(r.status_code)        assert r.status_code == 200    class websitUser(HttpLocust):    # 這個類繼承了HttpLocust，代表每個並發裏面的每個用戶    task_set = SevenLoust  # 這個是每個用戶都去幹什麼，指定了 SevenLoust 這個類，    min_wait = 3000  # 單位毫秒    max_wait = 6000  # 單位毫秒    if __name__ == "__main__":    import os      # -f是指定一個python文件 後面跟上咱們剛才寫的python文件    # --host是你要訪問哪個網站，後面跟網站的url    os.system("locust -f sevenLoust.py --host=http://www.7dtest.com/7DGroup/")