Developing a microservice using Docker

In this section, we will package the FastAPI service in a standardized way using Docker. This way, we can deploy the Docker image or container on the deployment target of your choice within around 5 minutes.

Docker has several advantages, such as replicability, security, development simplicity, and so on. We can use the official Docker image of fastAPI (tiangolo/uvicorn-gunicorn-fastapi) from Docker Hub. Here is a snippet of the Dockerfile:

FROM tiangolo/uvicorn-gunicorn-fastapi:python3.7
COPY ./app /app
RUN pip install -r requirements.txt
EXPOSE 80
CMD ["uvicorn", "weather_api:app", "--host", "0.0.0.0", "--port", "80"]

Firstly, we use an official fastAPI Docker image from Docker Hub by using the FROM command and pointing to the image – tiangolo/uvicorn-gunicorn-fastapi:python3.7. The image uses Python 3.7, which is compatible with fastAPI. Next, we copy the app folder...