最时候该讲一下 locust 工具的参数了，虽然前面几节我们已经使用了不少参数，例如 “-f” 、“–host” 等。
Locust 参数
打开命令提示符（或Linux终端），输入 locust --help 。
> 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 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
参数说明：
| 参数 | 说明 |
|---|---|
| -h, –help | 查看帮助 |
| -H HOST, –host=HOST | 指定被测试的主机，采用以格式：http://10.21.32.33 |
| –web-host=WEB_HOST | 指定运行 Locust Web 页面的主机，默认为空 “。 |
| -P PORT, –port=PORT, –web-port=PORT | 指定 –web-host 的端口，默认是8089 |
| -f LOCUSTFILE, –locustfile=LOCUSTFILE | 指定运行 Locust 性能测试文件，默认为: locustfile.py |
| –csv=CSVFILEBASE, –csv-base-name=CSVFILEBASE | 以CSV格式存储当前请求测试数据。 |
| –master | Locust 分布式模式使用，当前节点为 master 节点。 |
| –slave | Locust 分布式模式使用，当前节点为 slave 节点。 |
| –master-host=MASTER_HOST | 分布式模式运行，设置 master 节点的主机或 IP 地址，只在与 –slave 节点一起运行时使用，默认为：127.0.0.1. |
| –master-port=MASTER_PORT | 分布式模式运行， 设置 master 节点的端口号，只在与 –slave 节点一起运行时使用，默认为：5557。注意，slave 节点也将连接到这个端口+1 上的 master 节点。 |
| –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 | no-web 模式运行测试，需要 -c 和 -r 配合使用. |
| -c NUM_CLIENTS, –clients=NUM_CLIENTS | 指定并发用户数，作用于 –no-web 模式。 |
| -r HATCH_RATE, –hatch-rate=HATCH_RATE | 指定每秒启动的用户数，作用于 –no-web 模式。 |
| -t RUN_TIME, –run-time=RUN_TIME | 设置运行时间, 例如： (300s, 20m, 3h, 1h30m). 作用于 –no-web 模式。 |
| -L LOGLEVEL, –loglevel=LOGLEVEL | 选择 log 级别（DEBUG/INFO/WARNING/ERROR/CRITICAL）. 默认是 INFO. |
| –logfile=LOGFILE | 日志文件路径。如果没有设置，日志将去 stdout/stderr |
| –print-stats | 在控制台中打印数据 |
| –only-summary | 只打印摘要统计 |
| –no-reset-stats | Do not reset statistics once hatching has been completed。 |
| -l, –list | 显示测试类, 配置 -f 参数使用 |
| –show-task-ratio | 打印 locust 测试类的任务执行比例，配合 -f 参数使用. |
| –show-task-ratio-json | 以 json 格式打印 locust 测试类的任务执行比例，配合 -f 参数使用. |
| -V, –version | 查看当前 Locust 工具的版本. |
个别参数，我没用过，也太清楚其含义，暂时就不翻译了。