Dockerfile

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FROM python:3.7.9
RUN sed -i "s@http://deb.debian.org@http://mirrors.aliyun.com@g" /etc/apt/sources.list && rm -Rf /var/lib/apt/lists/* && apt-get update && apt-get install -y supervisor --no-install-recommends
ADD . /var/web_backend
WORKDIR /var/web_backend
RUN pip install -i https://mirrors.aliyun.com/pypi/simple -r requirements.txt
COPY daphne.conf /etc/supervisor/conf.d/
RUN chmod u+x ./start.sh
EXPOSE 80
ENTRYPOINT ["sh"]
CMD ["./start.sh"]

Supervisor

⚠️ 注意，这里的 socket=tcp://0.0.0.0:80 不能使用 localhost，否则只能在容器内访问服务。

下面是我的 supervisor 配置文件 daphne.conf 的内容。配置文件的内容参考自文档

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[fcgi-program:daphne]
# TCP socket used by Nginx backend upstream
socket=tcp://0.0.0.0:80

# Directory where your site's project files are located
directory=/var/web_backend

user=root
# Each process needs to have a separate socket file, so we use process_num
# Make sure to update "mysite.asgi" to match your project name
command=daphne --fd 0 --access-log - --proxy-headers web_backend.asgi:application

# Number of processes to startup, roughly the number of CPUs you have
numprocs=4

# Give each process a unique name so they can be told apart
process_name=asgi%(process_num)d

# Automatically start and recover processes
autostart=true
autorestart=true

# Choose where you want your log to go
redirect_stderr=true
stdout_logfile=/var/log/web_backend/asgi.log
stderr_logfile=/var/log/web_backend/asgierror.log

启动脚本 start.sh

⚠️ 注意，这里的 -n 参数一定要加上，让服务以非后台服务的方式启动，否则 docker 服务会一直不停重启。

启动脚本 start.sh 内容如下：

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#!bin/bash
supervisord -n -c /etc/supervisor/supervisord.conf

Use docker-compose

docker-compose 配置文件

使用 docker-compose 启动 docker 服务。docker-compose.yml 文件内容如下：

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version: '3'
services:
  asgi_backend:
    build: .
    container_name: web_backend
    ports:
      - "8080:80"
    volumes:
      - /var/log/web_backend:/var/log/web_backend
    environment:
      - DJANGO_SETTINGS_MODULE=web_backend.settings.dev
    restart: always

启动服务

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