If you’re deploying your app on Fly.io, you can add Subtrace in just a couple of steps. Depending on the kind of Fly builder you’re using, the instructions are different. We’ll use a Python Uvicorn server as an example, but you can do this with any language and framework.
Make the following changes to your app’s Dockerfile:
- CMD ["uvicorn", "main:app", "--host", "0.0.0.0"]
+ RUN curl -fsSLO "https://subtrace.dev/download/latest/$(uname -s)/$(uname -m)/subtrace" && chmod +x ./subtrace
+ CMD ["./subtrace", "run", "--", "uvicorn", "main:app", "--host", "0.0.0.0"]
Get a SUBTRACE_TOKEN from the Tokens page on the dashboard and set it as a Fly.io secret:
fly secrets set SUBTRACE_TOKEN=subt_...
Deploy your app as you normally would:
fly deploy
That’s it! You can now visit your app and make some requests to see them automatically appear in the Subtrace dashboard.