python性能测试框架locust：
1 性能测试的内容：
> 压力产生器，也就是可以指定产生多大的压力，多少并发；
> 数据统计，也就是结果的展示，要统计TPS是多少，响应时间多少等等，这些数据；
> 代理功能，代理功能呢说白了就一句话，分摊压力
系统吞吐量的指标：
QPS（TPS）：每秒钟request/事务 数量
并发数： 系统同时处理的request/事务数
响应时间： 一般取平均响应时间
2 下载安装：
Locust是python的一个第三方模块，安装很简单，直接pip install locust
3 测试demo：
from locust import HttpLocust, TaskSet, task
# HttpLocust 这个类的作用是用来发送http请求的
# TaskSet 这个类是定义用户行为的，相当于loadrunnerhttp协议的脚本，jmeter里面的http请求一样，要去干嘛的
# task 这个task是一个装饰器，它用来把一个函数，装饰成一个任务，也可以指定他们的先后执行顺序
class UserBehavior(TaskSet):
def on_start(self):
""" on_start is called when a Locust start before any task is scheduled """
self.login()
def on_stop(self):
""" on_stop is called when the TaskSet is stopping """
self.logout()
def login(self):
self.client.post("/login", {"username":"ellen_key", "password":"education"}) # 先验证登录
def logout(self):
self.client.post("/logout", {"username":"ellen_key", "password":"education"})
@task(2)
def index(self):
self.client.get("/")
@task(1)
def profile(self):
self.client.get("/profile")
class WebsiteUser(HttpLocust):
# 定义用户的请求
task_set = UserBehavior # 指定用户任务
min_wait = 5000
max_wait = 9000
# 超时时间范围
# wait_function = lambda self: random.expovariate(1)*1000
# 写成固定的超时时间
4 启动locust
无界面 locust -f locust_test.py --host=http://10.0.0.206:8086/ --csv=locustTest --no-web -c 20 -r 5 --run-time 1m
有界面 locust -f locust_test.py --host=http://10.0.0.206:8087/ --web-host=127.0.0.1 --web-port=8088
-f 指定py文件
--host 指定请求的域名
--csv 指定生成 csv文件
--no-web 指定不使用 UI 界面执行 -c client数量 -r 每个client请求的速度
详细参数介绍参数
locust --help
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 Do not reset statistics once hatching has been
completed
-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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