python - 如何使用MariaDB运行dockerized Django REST Framework后端？

Question

如标题中所示:使用Docker时，我很难切换到MariaDB。
只要我从磁盘本地启动了许多不同的数据库(默认SQLite，PostgreSQL和MariaDB)，每种配置都可以正常工作。 SQLite和PostgreSQL也可以与Docker一起使用(Postgres驱动程序的安装顺利进行)，但是MariaDB报告了获取MariaDB Connector/C的问题。Dockerfile:

FROM python:3.8.5-alpine3.12

ENV PYTHONUNBUFFERED 1

COPY ./requirements.txt /requirements.txt
RUN apk add libmariadb3
RUN pip install -r /requirements.txt

RUN mkdir /app
WORKDIR /app
COPY ./app /app

RUN adduser --disabled-password user
USER user

docker-compose.yml:

version: "3"

services:
  app:
    build:
      context: .
    ports:
      - "8000:8000"
    volumes:
      - ./app:/app
    command:
      sh -c "python manage.py runserver 0.0.0.0:8000"
    environment:
      [...]
    depends_on:
      - db

  db:
    image: mariadb:10.5.4
    environment:
      [...]

我得到的错误是:

[...]
Step 4/11 : RUN apk add libmariadb3
 ---> Running in 5a3e568b8ac3
fetch http://dl-cdn.alpinelinux.org/alpine/v3.12/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.12/community/x86_64/APKINDEX.tar.gz
ERROR: unsatisfiable constraints:
  libmariadb3 (missing):
    required by: world[libmariadb3]
ERROR: Service 'app' failed to build: The command '/bin/sh -c apk add libmariadb3' returned a non-zero code: 1

根据 documentation的说明，可以将 MariaDB Connector/C与 apt-get， yum， dnf， zypper或从源安装在一起，但显然不能与 apk一起安装。
考虑的解决方案:

将MariaDB Connector/C tar.gz下载到项目目录，并在构建镜像时将其复制。缺点:必须照顾手动更新驱动程序。

使用在Ubuntu上运行的Python镜像。缺点:足够小吗？是否仍然受支持(在Docker Hub的列表中不可见)？

正如我在上面所写，这些解决方案似乎并不令人满意。您知道配置MariaDB与Python一起使用的其他方法吗？

Answer 1

似乎python:3.9.0b5-buster已经具备956MB的所有功能:$ cat Dockerfile

FROM python:3.9.0b5-buster 
RUN apt-get update
RUN apt-get install libmariadb3

$ docker build -t py-booster-with-maria .

Step 3/3 : RUN apt-get install libmariadb3
 ---> Running in 40be8f94b3de
Reading package lists...
Building dependency tree...
Reading state information...
libmariadb3 is already the newest version (1:10.3.22-0+deb10u1).
libmariadb3 set to manually installed.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

docker image ls | grep py-booster-with-maria

py-booster-with-maria              latest                       e7c61439835f        7 minutes ago       956MB