Railway•9mo ago

Running python scripts in cron?

how can i run a cron python script on railway? like just run once every minute. No active container? I have a script called simulate.py which i wanna run on a cron schedule. How do I set this up as my nixpack build fails.

14 Replies

Percy•9mo ago

Project ID: f939f8da-1921-4926-b703-976d253eafb2

croissantOP•9mo ago

f939f8da-1921-4926-b703-976d253eafb2

Brody•9mo ago

railway's cron schedular does not let you run at a frequency of 1 minute, if you need the script to be ran at one minute intervals you would need to either use an in code schedular (active container as you call it) or use https://railway.app/template/fwH-l3 in restart mode. but before we worry about cron at all, we would need to get your script to at least launch, and for that, please provide your repo and any error messages you are getting.

Adam•9mo ago

the error is very likely that nixpacks is unable to generate a build plan, since your script isn’t following the usual naming conventions (eg. main.py) but that can be worked around

croissantOP•9mo ago

What is the lowest frequency? Figured out I could just use a dockerfile Dropping it here if anyone references this in future

# Use an official Python runtime as a parent image
FROM python:3.9-slim

# Set the working directory in the container
WORKDIR /usr/src/app

# Copy the current directory contents into the container at /usr/src/app
COPY . /usr/src/app

# Install any needed packages specified in requirements.txt
RUN pip install --no-cache-dir -r requirements.txt

# Run simulate.py when the container launches
CMD ["python", "./simulate.py"]

# Use an official Python runtime as a parent image
FROM python:3.9-slim

# Set the working directory in the container
WORKDIR /usr/src/app

# Copy the current directory contents into the container at /usr/src/app
COPY . /usr/src/app

# Install any needed packages specified in requirements.txt
RUN pip install --no-cache-dir -r requirements.txt

# Run simulate.py when the container launches
CMD ["python", "./simulate.py"]

Brody•9mo ago

yeah that looks fine to me ill check it appears you can now do 1 minute intervals natively, i distinctly remember them disallowing that, at least the ui tells me that it will run every minute

croissantOP•9mo ago

Just found docs saying 15 mins

Quote from “Cron Jobs | Railway Docs”

croissantOP•9mo ago

The UI does let me set every minute though

Brody•9mo ago

croissantOP•9mo ago

Doesn't seem like it runs at all

Brody•9mo ago

fair enough

croissantOP•9mo ago

Bug report? I'll go away to the cron template

Brody•9mo ago

its just a ui bug, nothing of major concern the min frequency is indeed 15 minutes for hobby users

croissantOP•9mo ago

Noted

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Running python scripts in cron?