前言

最近學習python也想通過python中的locust子產品做性能測試，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是一個易于使用，分布式，使用者負載測試工具。它用于負載測試web站點(或其他系統)并計算一個系統可以處理多少并發使用者。]

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(或者測試使用者)的行為由您定義，叢集過程由web UI實時監控。這将幫助您在讓真正的使用者進入之前進行測試并識别代碼中的瓶頸。]

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完全是基于事件的，是以在一台機器上支援數千個并發使用者是可能的。與許多其他基于事件的應用程式不同，它不使用回調。相反，它通過gevent使用輕量級程序。每個聚集在你的站點上的蝗蟲實際上是在它自己的程序中運作的(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

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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

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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   這個類是定義使用者行為的，相當于loadrunnerhttp協定的腳本，jmeter裡面的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，也就是這個類是實作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):  # 這個函數裡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裡面的哪個路徑，        print(r.status_code)        assert r.status_code == 200

class websitUser(HttpLocust):    # 這個類繼承了HttpLocust，代表每個并發裡面的每個使用者    task_set = SevenLoust  # 這個是每個使用者都去幹什麼，指定了 SevenLoust 這個類，    min_wait = 3000  # 機關毫秒    max_wait = 6000  # 機關毫秒

if __name__ == "__main__":    import os
    # -f是指定一個python檔案 後面跟上咱們剛才寫的python檔案    # --host是你要通路哪個網站，後面跟網站的url    os.system("locust -f sevenLoust.py --host=http://www.7dtest.com/7DGroup/")

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點選啟動

提示：

打開浏覽器顯示：

Number of users to simulate 設定虛拟使用者總數
Hatch rate (users spawned/second) 每秒啟動虛拟使用者數
點選Start swarming 開始運作性能測試

Type：請求類型；
Name：請求路徑；
requests：目前請求的數量；
fails：目前請求失敗的數量；
Median：中間值，機關毫秒，一般伺服器響應時間低于該值，而另一半高于該值；
Average：所有請求的平均響應時間，毫秒；
Min：請求的最小的伺服器響應時間，毫秒；
Max：請求的最大伺服器響應時間，毫秒；
Content Size：單個請求的大小，機關位元組；
reqs/sec：每秒鐘請求的個數。

Charts圖形顯示

吞吐量/每秒響應事務數（rps）實時統計

平均響應時間/平均事務數實時統計

虛拟使用者數運作

如果停止點選

總結：

以上是簡單上手demo，隻要會python基礎，一看就知道。

性能工具之locust簡單上手安裝 前言快速上手demoCharts圖形顯示如果停止點選

前言

安裝