需求描述
简单说，就是创建一个服务型的镜像，即运行基于该镜像创建的容器时，基于该容器自动开启一个服务。具体来说，是创建一个部署了nginx，uwsgi，python，django项目代码的镜像，运行基于该镜像创建的容器时，自动开启nginx,uwsgi等服务。简单理解就是在容器内部，通过nginx uwsgi部署Django项目
实践环境
CentOS Linux release 7.9.2009
实践过程
实践过程1
Django项目代码组织结构
env_setup.sh
代码语言：javascript复制#!/bin/bash
yum install -y wget gcc make zlib* openssl-devel sqlite-devel
wget http://nginx.org/download/nginx-1.10.3.tar.gz
tar -xvzf nginx-1.10.3.tar.gz
cd nginx-1.10.3
./configure --prefix=/usr/local/nginx
make && make install
cp -f /opt/DjServer/docker/nginx.conf /usr/local/nginx/conf/nginx.conf
chmod 755 /usr/local/nginx/conf/nginx.conf
ln -s /usr/local/nginx/sbin/nginx /usr/bin/nginx
cd .. && rm -rf nginx-1.10.3*
wget http://www.sqlite.org/2019/sqlite-autoconf-3280000.tar.gz
tar -xvzf sqlite-autoconf-3280000.tar.gz
cd sqlite-autoconf-3280000
./configure --prefix=/usr/local/sqlite
make && make install
mv /usr/bin/sqlite3 /usr/bin/sqlite3_old
ln -s /usr/local/sqlite/bin/sqlite3 /usr/bin/sqlite3
echo "/usr/local/sqlite/lib" > /etc/ld.so.conf.d/sqlite3.conf
ldconfig
cd .. && rm -rf sqlite-autoconf-*
wget https://www.python.org/ftp/python/3.6.13/Python-3.6.13.tgz
tar -xvzf Python-3.6.13.tgz
cd Python-3.6.13
./configure --prefix=/usr/local/python36
make && make install
cd .. && rm -rf Python-3.6.13*
ln -s /usr/local/python36/bin/python3 /usr/bin/python3
ln -s /usr/local/python36/bin/pip3 /usr/bin/pip3
ls
pip3 install -r /opt/DjServer/requirements.txt
ln -s /usr/local/python36/bin/uwsgi /usr/bin/uwsgi
mkdir -p /var/log/uwsgistart.sh
代码语言：javascript复制#!/bin/bash
`uwsgi --ini uwsgi.ini &` && nginx -c /usr/local/nginx/conf/nginx.conf -g "daemon off;"nginx.conf
代码语言：javascript复制worker_processes 16;
events {
worker_connections 65535;
}
http {
include mime.types;
default_type application/octet-stream;
keepalive_timeout 65;
reset_timedout_connection on;
server {
listen 80;
server_name localhost;
charset utf-8;
#access_log logs/access.log;
access_log off;
error_log logs/error.log;
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}
location / {
uwsgi_send_timeout 60;
uwsgi_connect_timeout 60;
uwsgi_read_timeout 600;
include uwsgi_params;
uwsgi_pass 127.0.0.1:8000;
}
}
}requirements.txt
代码语言：javascript复制Django==3.0.6
uwsgi==2.0.8前置准备工作
如下，创建一个干净的目录(例中为myworkspace)，用于创建镜像，并将解压后的Django项目代码存放到该目录，然后在该目录下新建并编写dockerfile，.dockerignore文件。
# pwd
/root/myworkspace
# ls -a
. .. DjServer dockerfile .dockerignoredockerfile
代码语言：javascript复制FROM centos:7.9.2009
WORKDIR /opt/DjServer
COPY ./DjServer .
RUN chmod 755 ./docker/env_setup.sh
&& sh ./docker/env_setup.sh
&& chmod 755 ./docker/start.sh
EXPOSE 80
ENTRYPOINT ["./docker/start.sh"].dockerignore
代码语言：javascript复制*/__pycache__创建服务镜像
如下，创建djserver:v1.0镜像
# docker build -t djserver:v1.0 .
...略
Successfully tagged djserver:v1.0创建容器
基于上述镜像创建名为dj80的容器，映射宿主主机80端口到容器的80端口，并为容器设置环境变量
# docker run --name dj9003 -p 9003:80 -e hostPort=10.1.66.163:9003 -d -it djserver:v1.0测试验证
代码语言：javascript复制# curl http://10.7.0.236:9003/loadapi/api/v1/ip_forward # 10.7.0.236为容器所在宿主机实践过程2
Django项目代码组织结构
注意：代码结构中的requirements.txt暂时没用到，对该文件的定位是，存放创建基础镜像时新增requirements.txt文件所包含依赖包除外的其它依赖包。
创建基础镜像前置准备工作
如下，创建一个干净的目录(例中为env_build)，用于创建提供软件运行环境的基础镜像，并在该目录下新建并编写dockerfile，新建env_conf目录，然后在env_conf目录下新建env_setup.sh, requirements.txt
# pwd
/root/env_build
# ls -aR
.:
. .. env_conf env_dockerfile
./env_conf:
. .. env_setup.sh requirements.txtenv_dockerfile
代码语言：javascript复制FROM centos:7.9.2009
COPY ./env_conf .
RUN chmod 755 env_setup.sh
&& sh env_setup.sh
&& rm -f env_setup.sh requirements.txtenv_setup.sh
代码语言：javascript复制#!/bin/bash
yum install -y wget gcc make zlib* openssl-devel sqlite-devel
wget http://nginx.org/download/nginx-1.10.3.tar.gz
tar -xvzf nginx-1.10.3.tar.gz
cd nginx-1.10.3
./configure --prefix=/usr/local/nginx
make && make install
cd .. && rm -rf nginx-1.10.3*
ln -s /usr/local/nginx/sbin/nginx /usr/bin/nginx
wget http://www.sqlite.org/2019/sqlite-autoconf-3280000.tar.gz
tar -xvzf sqlite-autoconf-3280000.tar.gz
cd sqlite-autoconf-3280000
./configure --prefix=/usr/local/sqlite
make && make install
mv /usr/bin/sqlite3 /usr/bin/sqlite3_old
ln -s /usr/local/sqlite/bin/sqlite3 /usr/bin/sqlite3
echo "/usr/local/sqlite/lib" > /etc/ld.so.conf.d/sqlite3.conf
ldconfig
cd .. && rm -rf sqlite-autoconf-*
wget https://www.python.org/ftp/python/3.6.13/Python-3.6.13.tgz
tar -xvzf Python-3.6.13.tgz
cd Python-3.6.13
./configure --prefix=/usr/local/python36
make && make install
cd .. && rm -rf Python-3.6.13*
ln -s /usr/local/python36/bin/python3 /usr/bin/python3
ln -s /usr/local/python36/bin/pip3 /usr/bin/pip3
pip3 install -r requirements.txt
ln -s /usr/local/python36/bin/uwsgi /usr/bin/uwsgi
mkdir -p /var/log/uwsgirequirements.txt
代码语言：javascript复制Django==3.0.6
uwsgi==2.0.8注意：这里对requirements.txt的定位是，用于存放一定需要安装，并且极少改动（比如更换版本）的软件依赖包
创建基础镜像
如下，创建djbase:v1.0基础镜像，为运行Django项目提供所需的软件运行环境
# docker build --no-cache -t djbase:v1.0 -f env_dockerfile .
...略docker build --no-cache -t djbase:v1.0 -f env_dockerfile .
Successfully tagged djbase:v1.0创建服务镜像前置准备工作
创建一个干净的目录(例中为server_build)，用于创建最终服务镜像，并将解压后的Django项目代码存放到该目录，然后在该目录下新建并编写dockerfile，.dockerignore 文件。
# pwd
/root/server_build
# ls -a
. .. DjServer dockerfile .dockerignoredockerfile
代码语言：javascript复制FROM djbase:v1.0
WORKDIR /opt/DjServer
RUN mkdir -p /var/log/uwsgi
COPY ./DjServer/docker/nginx.conf .
RUN mv -f ./nginx.conf /usr/local/nginx/conf/nginx.conf && chmod 755 /usr/local/nginx/conf/nginx.conf
COPY ./DjServer .
RUN chmod 755 ./docker/start.sh
EXPOSE 80
ENTRYPOINT ["./docker/start.sh"].dockerignore
代码语言：javascript复制*/__pycache__docker/start.sh
代码语言：javascript复制#!/bin/bash
`uwsgi --ini uwsgi.ini &` && nginx -c /usr/local/nginx/conf/nginx.conf -g "daemon off;"docker/nginx.conf
同“实践过程1”
创建服务镜像
如下，创建djserver:v1.0服务镜像
# docker build -t djserver:v1.0 .
...略
Successfully tagged djserver:v1.0创建容器
基于上述镜像创建名为djserver的容器，映射宿主主机80端口到容器的80端口
# docker run --name dj9003 -p 9003:80 -e hostPort=10.1.66.163:9003 -d -it djserver:v1.0
