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This is a basic example of an app which uses aiohttp. The key code of note is:

  1. It runs all the API routes off of the SCRIPT_PATH environment variable which is supplied by the custom apps runtime. This is required because datarobot performs liveness checks to the root path.
  2. It routes calls from / to //. This is important because the liveness checks get sent to the root (eg: /custom_applications/ and we need to redirect that to /custom_applications// so the result is not a 404.
  3. It runs on port 8080

To get this running on custom apps, simply run docker build . -t my-aiohttp-custom-app to build the image, then run docker save my-aiohttp-custom-app -o myAiohttpApp.tgz to save the app to a tgz. That tgz can then be uploaded on the applications page.

Troubleshooting:

  • Some computers (eg M1 Macbooks) require docker images to be built via docker buildx build --platform linux/amd64 . -t custom-apps-aiohttp. This requires Docker Desktop, which requires a seperate license.