Run FastAPI inside a docker container

As someone who uses Docker for every project, I wanted to setup a dev environment for FastAPI. These are the steps I followed to dockerize my FastAPI Hello World.

Sample API

This is a sample API which will be dockerized.

from fastapi import FastAPI

app = FastAPI()

@app.get("/")
async def root():
    return { "message": "I'm dockerized FastAPI" }

Dockerfile

FROM python:3.11-slim

WORKDIR /api

COPY requirements.txt .

RUN pip install -r requirements.txt

COPY . .

EXPOSE 8080

CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8080"]

Build the image

docker build -t testapi .

I'm tagging it as testapi.

Run the image

docker run -p 8080:8080 testapi

Call the API

curl http://localhost:8080

And see the output

{ "message": "I'm dockerized FastAPI" }

• Tech,
• Python,
• FastAPI

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