在Docker容器中使用uwsgi和nginx设置Flask应用

Question

我正在尝试在Docker容器中运行带有flask，uwsgi和nginx的Docker容器。

我的Dockerfile看起来像这样：

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：

[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;
    }

然后是我的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

步骤12：运行systemctl启动应用

--->在79a22c2629db中运行

无法连接到总线：没有这样的文件或目录

INFO [0022]命令[/ bin / sh -c systemctl start app]返回了非零代码：1

我正在阅读，我认为问题出在systemd。 我应该使用主管。 但是我不知道如何去做。

在“普通”服务器上，我可以运行这些命令，并且可以运行，但在Docker容器中则无法运行。

我的“唯一”问题是我必须使用uwsgi和nginx运行我的应用程序，但我不明白。

我在Internet上阅读了许多帖子和教程，也尝试更改此项目，但它仍然无法正常工作，我更喜欢使用我的dockerfile（此文件），因为这是我的理解。

Answer 1

我找到了答案。

我和主管一起解决了。

# 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看起来像

[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容器中使用与实际systemd受控机器上相同的systemctl命令。 作为CMD运行时，它将启动所有已启用的服务。