Ability to run test_start on workers.

Is your feature request related to a problem? Please describe.

I have a load test where some setup is needed, but I really only need to do it once to set some global variables, that all spawned users to use.

Previously this was done with the HttpLocust.setup method. Unfortunately, now there is the test_start functionality which only runs on the master.

Describe the solution you’d like

Allow the test_start functionality to run on workers.

Describe alternatives you’ve considered

I can use the HttpUser.on_start method, but it results in ever single user that is spawned making a request (part of the work that I have to do in the setup), and it’s not ideal.

[cyberw]

Also, if what you want it just to do some general one-off initialization (not in the context of a User), you can do it using the init event, which IS triggered on all locust processes:

from locust import events
from locust.runners import MasterRunner
...
@events.init.add_listener
def on_locust_init(environment, **kwargs):
    if not isinstance(environment.runner, MasterRunner):
        # do the setup work

[cyberw]

Is there a way to access the HTTP client from a listener? I want to be able to make a few HTTP requests to the target during the test_start event, but since that’s not within the User context I can’t do it.

In short, no, not from the test_start/stop events. But there is nothing stopping you from making an HTTP request ”manually”, using requests directly. It just wont be logged.