24 days ago
Our FastAPI service starts successfully on Railway but is not accessible from the public internet, getting 503 after 10s.
The container logs show the server is running correctly.
Environment:
Python 3.11-slim-bullseye Docker image
Hypercorn ASGI server
FastAPI application
Service URL:
https://ollie-production.up.railway.app
Dockerfile:
FROM python:3.11-slim-bullseye
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1
ENV PYTHONPATH=/app
WORKDIR /app
RUN apt-get update \
&& apt-get install -y --no-install-recommends \
build-essential \
curl \
&& rm -rf /var/lib/apt/lists/*
COPY requirements.txt .
RUN pip install --no-cache-dir --upgrade pip \
&& pip install --no-cache-dir -r requirements.txt
COPY ./src ./src
RUN useradd --create-home --shell /bin/bash app \
&& chown -R app:app /app
USER app
EXPOSE ${PORT:-8080}
CMD ["sh", "-c", "hypercorn src.main:app --bind 0.0.0.0:${PORT:-8080} --debug"]
Container Logs (Success):
Starting Container
INFO:asyncio:<Server sockets=(<asyncio.TransportSocket fd=3, family=2, type=1, proto=0, laddr=('0.0.0.0', 8080)>,)> is serving
[2025-07-12 11:30:43 +0000] [4] [INFO] Running on http://0.0.0.0:8080 (CTRL + C to quit)
INFO:hypercorn.error:Running on http://0.0.0.0:8080 (CTRL + C to quit)
Issue:
Container starts successfully and binds to port 8080
Server shows as running in logs
Public URL
https://ollie-production.up.railway.appis not accessible (connection timeout/refused)Health check endpoint
/healthexists in the application and it's a successful call after the build
What we've tried:
Binding to
0.0.0.0:${PORT}Using both uvicorn and hypercorn
Verified FastAPI routes are defined correctly
Confirmed container is running without errors
2 Replies
24 days ago
Hey there! We've found the following might help you get unblocked faster:
If you find the answer from one of these, please let us know by solving the thread!
24 days ago
Fixed it by changing the port to 8080 in Public Networking
The main confusion was the successful /health returning 200.
Status changed to Solved brody • 24 days ago