在 docker 容器中使用 uwsgi 和 nginx 设置烧瓶应用程序

Question

我正在尝试运行一个 Docker 容器，在 docker 容器中装有烧瓶、uwsgi 和 nginx。

我的 Docker 文件看起来是这样的：

FROM ubuntu:16.04

MAINTAINER Dockerfiles

# Install required packages and remove the apt packages cache when done.
RUN apt-get update && \
    apt-get upgrade -y && \
    apt-get install -y \
    ...
    
# install uwsgi 
RUN pip3 install uwsgi

# copy over requirements.txt file
COPY requirements.txt /home/docker/code/

# upgrade pip and install required python packages
RUN pip3 --no-cache-dir install -U pip
RUN pip3 --no-cache-dir install -r /home/docker/code/requirements.txt

# add (the rest of) our code
COPY ./app /home/docker/code/

# create a systemd unit file
COPY ./app.service /etc/systemd/system/  # Think the problem is here

# start the uwsgi service
RUN systemctl start app  # This is not working
RUN systemctl enable app

# setup all the configfiles
COPY nginx_app /etc/nginx/sites-available/

# enable nginx server block
RUN ln -s /etc/nginx/sites-available/nginx_app /etc/nginx/sites-enabled

# validate syntax
CMD ["nginx", "-t"]

# restart nginx
RUN systemctl restart nginx

# allow nginx
RUN ufw allow 'Nginx Full'

然后是我的 app.service 所以：

[Unit]
Description=uWSGI instance to serve app
After=network.target

[Service]
User=docker
Group=www-data
WorkingDirectory=/home/docker/code
ExecStart=/usr/local/bin/uwsgi --ini uwsgi.ini

[Install]
WantedBy=multi-user.target

nginx 配置

server {
    listen 80;
    server_name my_server_ip;

    # max upload size
    client_max_body_size 75M;   # adjust to taste

    location / {
        include uwsgi_params;
        uwsgi_pass unix:/home/docker/code/myproject.sock;
    }

然后我的uwsgi.ini

[uwsgi]
module = wsgi:app

master = true
processes = 5

socket = app.sock
chmod-socket = 664
vacuum = true

die-on-term = true

但是当我尝试构建它时，出现此错误

Step 12 : RUN systemctl start app

---> Running in 79a22c2629db

failed to connect to bus: No such file or directory

INFO[0022] The command [/bin/sh -c systemctl start app] returned a non-zero code: 1

我正在阅读，我认为问题出在 systemd 上。我应该使用 supervisord。但是我不知道该怎么做。

在“普通”服务器上我可以运行这些命令并且它会工作，但在 docker 容器中不工作。

我遇到的“唯一”问题是我必须运行我的应用程序与 uwsgi 和 nginx 但我不明白。

我在 Internet 上阅读了很多帖子和教程，也尝试更改 this project 但它仍然无法正常工作，我更愿意使用我的 docker 文件（这个），因为它是我的明白了。

Answer 1

我找到了答案。

我用supervisord解决了。

# install uwsgi now because it takes a little while
RUN pip3 install uwsgi

# setup all the configfiles
RUN echo "daemon off;" >> /etc/nginx/nginx.conf
COPY nginx_app.conf /etc/nginx/sites-available/default
COPY supervisor_app.conf /etc/supervisor/conf.d/


# copy over our requirements.txt file
COPY requirements.txt /home/docker/code/

# upgrade pip and install required python packages
RUN pip3 --no-cache-dir install -U pip
RUN pip3 --no-cache-dir install -r /home/docker/code/requirements.txt

# add (the rest of) our code
COPY ./app /home/docker/code/

EXPOSE 80
CMD ["supervisord"]

然后 supervisor_app.conf 看起来是这样

[supervisord]
nodaemon=true

[program:uwsgi]
command = /usr/local/bin/uwsgi --ini /home/docker/code/uwsgi.ini
stdout_logfile=/dev/stdout
stdout_logfile_maxbytes=0
stderr_logfile=/dev/stderr
stderr_logfile_maxbytes=0

[program:nginx]
command = /usr/sbin/nginx
stdout_logfile=/dev/stdout
stdout_logfile_maxbytes=0
stderr_logfile=/dev/stderr
stderr_logfile_maxbytes=0

uwsg.ini

[uwsgi]
callable = app
chdir = /home/docker/code/
wsgi-file = /home/docker/code/wsgi.py
socket = /home/docker/code/app.sock
master = true
processes = 2
chmod-socket = 666
enable-threads = true

和我的nginx_app.conf

server {
    listen 80 default_server;
    server_name my_ip;

    # max upload size
    client_max_body_size 75M;   # adjust to taste

    location / {
        include uwsgi_params;
        uwsgi_pass unix:///home/docker/code/app.sock;
    }
}

就是这样

Answer 2

您还可以使用 docker-systemctl-replacement，它专门用于允许在 docker 容器中使用与在真正的 systemd 控制的机器上相同的 systemctl 命令。当运行它作为 CMD 时，它将启动所有已启用的服务。

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