FastAPI Docker#

FastAPI 框架，高性能，易于学习，高效编码，生产可用

Docker#

依赖项#

vi requirements.txt

fastapi>=0.68.0,<0.69.0
pydantic>=1.8.0,<2.0.0
uvicorn>=0.15.0,<0.16.0

FastAPI 代码#

vi api/main.py

from typing import Union
from fastapi import FastAPI
app = FastAPI()

@app.get("/")
def read_root():
    return {"Hello": "World"}

@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}

Dockerfile#

vi Dockerfile

FROM python:3.12-slim-bookworm
WORKDIR /app
COPY ./requirements.txt /app/requirements.txt
RUN pip install --no-cache-dir --upgrade -r /app/requirements.txt
COPY ./api /app/api
CMD ["uvicorn", "api.main:app", "--host", "0.0.0.0", "--port", "80"]

目录结构：

.
├── api
│   └── main.py
├── Dockerfile
└── requirements.txt

构建 Docker 镜像#

docker build -t myimage .

启动 Docker 容器#

docker run -d --name mycontainer -p 8000:80 myimage

Swagger UI: http://localhost:8000/docs
ReDoc: http://127.0.0.1:8000/redoc
检查一下: http://127.0.0.1:8000/items/5?q=somequery

pip#

安装#

pip install fastapi
# ASGI 服务器
pip install "uvicorn[standard]"

运行#

uvicorn main:app --reload

Uvicorn#

An ASGI web server, for Python.

1.Command Line

uvicorn main:app --host 0.0.0.0 --port 8000

2.Programmatic

uvicorn.run("main:app", host="0.0.0.0", port=8000)

3.Environment Variables

export UVICORN_HOST="0.0.0.0"
export UVICORN_PORT="8000"
uvicorn main:app

fastapi_production_template#

FastAPI Template with Docker, Postgres

Local Development#

git clone https://github.com/zhanymkanov/fastapi_production_template.git
# Windows
winget install --id Casey.Just --exact
pip install --upgrade build
pip install poetry
cp .env.example .env
just run

Deployment#

docker compose -f docker-compose.prod.yml up -d --build

Tips#

Swagger UI加载缓慢#

vi api/main.py放置在app = FastAPI()代码之前

from fastapi import applications
from fastapi.openapi.docs import get_swagger_ui_html
def swagger_monkey_patch(*args, **kwargs):
    return get_swagger_ui_html(
        *args, **kwargs,
        swagger_js_url="https://cdn.staticfile.net/swagger-ui/5.1.0/swagger-ui-bundle.min.js",
        swagger_css_url="https://cdn.staticfile.net/swagger-ui/5.1.0/swagger-ui.min.css"
    )
applications.get_swagger_ui_html = swagger_monkey_patch

FastAPI Docker

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