步骤：
1.安装docker（这里不详细介绍）
# 参考命令 sudo wget -qo- https://get.docker/ | sh
2.应用目录结构
├──fanxiangce _docker ├── dockerfile ├── readme.md └─fanxiangce └──app ├── manage.py └── requirements ├── mon.txt
3.编写dockerfile（详细命令解释可以参考）
########################################################## # dockerfile to run a flask-based web application# based on an centos:7 image ########################################################## # set the base image to use to centos from centos:7 # set the file maintainer maintainer jasonwang,wjs7740@163 # set env varibles used in this dockerfile (add a unique prefix, such as dockyard) # local directory with project source env dockyard_src=fanxiangce # directory in container for all project files env dockyard_srchome=/opt # directory in container for project source files env dockyard_srcproj=/opt/fanxiangce # update the defualt application repository source list run yum -y install epel-release run yum -y install python-pip run yum clean all # copy application source code to srcdir copy $dockyard_src $dockyard_srcproj # create application subdirectories workdir $dockyard_srcproj run mkdir log volume ['$dockyard_srcproj/log/'] # install python dependencies run pip install --upgrade pip run pip install -r $dockyard_srcproj/requirementsmon.txt # port to expose expose 8000 # copy entrypoint script into the image workdir $dockyard_srcproj
4. build镜像
# 在dockerfile同级目录下 sudo docker build -t jason/webdemo .
成功后显示successfully，同时返回镜像id，如图：
5.查看并启动镜像
注意，此处-p映射的端口（主机端口：容器端口），容器端口应与flask应用定义的端口一致
sudo docker images sudo docker run -it --name webdemo -p 8000:8000 jason/webdemo /bin/bash
6.在容器中启动flask应用
python manage.py runserver -p 8000
启动成功如下截图：
7.在浏览器输入127.0.0.1:8000即可访问应用
8.后续
如果容器关闭后需要再次进入，可以用如下命令
# 查看当前容器 sudo docker ps -a # 启动容器 docker start webdemo # 进入容器 docker attach webdemo
