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When deploying FastAPI applications a common approach is to build a Linux container image. It's normally done using Docker. You can then deploy that container image in one of a few possible ways.

Using Linux containers has several advantages including security, replicability, simplicity, and others.

In a hurry and already know this stuff? Jump to the Dockerfile below.

Dockerfile Preview
FROM python:3.9

WORKDIR /code

COPY ./requirements.txt /code/requirements.txt

RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt

COPY ./app /code/app

CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "80"]

# If running behind a proxy like Nginx or Traefik add --proxy-headers
# CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "80", "--proxy-headers"]

Build a Docker Image for SearchA PI

This section will show you how to build a Docker image for Search API from scratch, based on the official Python image.

This is what you would want to do in most cases, for example:

  • Using Kubernetes or similar tools
  • When running on a Raspberry Pi
  • Using a cloud service that would run a container image for you, etc.

Package Requirements

Install the Search API requirements the same way it is specified in Install Python Dependencies

But in essence you need to do this

pip install -e .

And then 

pip install lib/pyqpl-VERSION_IN_PROJECT-py3-none-any.whl

Dockerfile

Now in the same project directory create a file Dockerfile with:

# Base image (alpine linux)
FROM python:3.11.2-alpine3.17 AS SearchAPI

# 
WORKDIR /search_api


# copy source files
COPY . .

# Install Python Dependencies
RUN pip3 install --no-cache-dir -e .

# Install Pyqpl local library
RUN pip3 install lib/pyqpl-1.0.5-py3-none-any.whl

# exposed port for docker image [CAN BE CHANGED, BUT WHEN RUNNING THE IMAGE, THIS WILL BE PORT THAT WILL BE OPEN INSIDE DOCKER]
EXPOSE 8085

# 
CMD ["uvicorn", "app.webapp:app", "--host", "0.0.0.0", "--port", "8085"]

Behind a TLS Termination Proxy

If you are running your container behind a TLS Termination Proxy (load balancer) like Nginx or Traefik, add the option --proxy-headers, this will tell Uvicorn to trust the headers sent by that proxy telling it that the application is running behind HTTPS, etc.

CMD ["uvicorn", "app.webapp:app", "--proxy-headers", "--host", "0.0.0.0", "--port", "8085"]
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