Molotov Executor

Molotov is a load testing tool developed by Mozilla. It's based on Python 3 and asynchronous I/O subsystem.

Important note: molotov requires Python >= 3.5 and doesn't work on Windows systems at the moment.

Usage:

execution:
- executor: molotov
  concurrency: 10  # number of Molotov workers
  ramp-up: 30s
  hold-for: 1m
  scenario:
    script: loadtest.py  # has to be  a valid Molotov script

{
    "execution": [
        {
            "executor": "molotov",
            "concurrency": 10,
            "ramp-up": "30s",
            "hold-for": "1m",
            "scenario": {
                "script": "loadtest.py"
            }
        }
    ]
}

Please keep in mind, that Molotov does not support iterations keyword.

Process number

If your tests requires a number of workers that is impossible to create from one process — you can use additional processes execution option to specify the number of processes for Molotov.

execution:
- executor: molotov
  concurrency: 100
  processes: 10
  hold-for: 5m
  scenario:
    script: loadtest.py

{
    "execution": [
        {
            "executor": "molotov",
            "concurrency": 100,
            "processes": 10,
            "hold-for": "5m",
            "scenario": {
                "script": "loadtest.py"
            }
        }
    ]
}

Think-time

If you need a delay between each worker run, use think-time option in scenario level. Note that you would have to move your script there as well.

execution:
- executor: molotov
  concurrency: 100
  processes: 10
  hold-for: 5m
  scenario: simple

scenarios:
  simple:
    think-time: 5
    script: molotov_example.py

{
    "execution": [
        {
            "executor": "molotov",
            "concurrency": 100,
            "processes": 10,
            "hold-for": "5m",
            "scenario": "simple"
        }
    ],
    "scenarios": {
        "simple": {
            "think-time": 5,
            "script": "molotov_example.py"
        }
    }
}

Module Settings

If you have installed Molotov in a non-standard location, you can use path option to point Taurus to the molotov executor. Also, you can pass specific molotov options via cmdline:

modules:
  molotov:
    path: /home/john/venv/bin/molotov
    cmdline: --verbose

{
    "modules": {
        "molotov": {
            "path": "\/home\/john\/venv\/bin\/molotov",
            "cmdline": "--verbose"
        }
    }
}