从头构建我的docker镜像，开发并部署
１，从仓库中获取到以下原始镜像1
django 1.9.8-python2 5237faea5e4b 2 weeks ago 441.3 MB
２，检查当前运行的容器． 目前么有运行
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zy@BDC1:~/software/docker_app/pstockAuto$ docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
３，运行原始镜像，进入交互式操作系统，并完成基础环境的初始化
说明：从头写ｄｏｃｋｅｒｆｉｌｅ，我认为在通用基础环境不具备的条件下，还是比较麻烦的．我的想法是，先手工完成基础环境配置，然后以此为基础，生成一个我的基础镜像．后续的开发都时基于此镜像，并用ｄｏｃｋｅｒｆｉｌｅ完成代码的构建．这样镜像的层数不会随着版本的发布而增加．
３．１进入容器系统：
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zy@BDC1:~/software/docker_app/pstockAuto$ docker run -i -t --name myd198p2 django:1.9.8-python2 /bin/bash
root@a94dd8be87da:/#
３．２ 测试网络
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root@a94dd8be87da:/# ping www.baidu.com
PING www.a.shifen.com (14.215.177.38): 56 data bytes
64 bytes from 14.215.177.38: icmp_seq=0 ttl=127 time=43.962 ms
３．３ 创建应用用户
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root@a94dd8be87da:/# useradd-d"/home/app" -m -s "/bin/bash" app
root@a94dd8be87da:/# passwd app
Enter new UNIX password: app123
Retype new UNIX password:
passwd: password updated successfully
root@a94dd8be87da:/# id app
uid=1000(app) gid=1000(app) groups=1000(app)
root@a94dd8be87da:/# su - app
app@a94dd8be87da:~$ pwd
/home/app
3.4 设置源，我的镜像时ｕｂｕｎｔｕ的
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root@a94dd8be87da:/# uname -a
Linux a94dd8be87da 4.4.0-31-generic #50-Ubuntu SMP Wed Jul 13 00:07:12 UTC 2016 x86_64 GNU/Linux
root@a94dd8be87da:/# cat /etc/apt/sources.list
deb http://httpredir.debian.org/debian jessie main
deb http://httpredir.debian.org/debian jessie-updates main
deb http://security.debian.org jessie/updates main
是国外的源，试了一下ｕｐｄａｔｅ成功，现在ｖｉｍ都没有，所以没法编辑，先ｕｐｄａｔｅ
root@a94dd8be87da:/# apt-get update
root@a94dd8be87da:/# apt-get install vim
我本机的源，复制粘贴进去．
zy@BDC1:~/software/docker_app/pstockAuto$ cat /etc/apt/sources.list | grep -v ^#
deb http://mirrors.aliyun.com/ubuntu/ xenial main restricted
deb http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted
deb http://mirrors.aliyun.com/ubuntu/ xenial universe
deb http://mirrors.aliyun.com/ubuntu/ xenial-updates universe
deb http://mirrors.aliyun.com/ubuntu/ xenial multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial-updates multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted
deb http://mirrors.aliyun.com/ubuntu/ xenial-security universe
deb http://mirrors.aliyun.com/ubuntu/ xenial-security multiverse
root@a94dd8be87da:/# vim /etc/apt/sources.list
顺手修改一个ｒｏｏｔ密码，以便将来从ａｐｐ还能切过来．
root@a94dd8be87da:/# passwd root
Enter new UNIX password: root
Retype new UNIX password:
passwd: password updated successfully
再ｕｐｄａｔｅ一下
root@a94dd8be87da:~# apt-get update
root@a94dd8be87da:~# apt-get install cron
３．５ 接下来就正常了，随意配置．最重要的，检查ｐｙｔｈｏｎ开发环境
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app@a94dd8be87da:~$ which pip
/usr/local/bin/pip
app@a94dd8be87da:~$ which python
/usr/local/bin/python
app@a94dd8be87da:~$ python
Python 2.7.12 (default, Jul 19 2016, 20:08:29)
on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import django
>>> django.VERSION
(1, 9, 8, 'final', 0)
>>>
别忘了安装ｐｙｔｈｏｎ三大神器．
app@a94dd8be87da:~$ pip install virtualenv virtualenvwrapper
报错了，切回ｒｏｏｔ重新执行安装成功．在本地虚拟环境开发，然后部署到容器，最后发布上线
＃配置时区．
app@735497f41f71:~$ vim .bashrc
TZ='Asia/Shanghai'; export TZ
３．６准备python环境项目的ｐｉｐ依赖包
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zy@BDC1:~/software/docker_app/pstockAuto$ workon pstockAuto
(pstockAuto) zy@BDC1:~/software/docker_app/pstockAuto$ pip freeze > requirements.txt
＃在镜像容器中安装依赖包
root@a94dd8be87da:/home/app# pip install -r requirements.txt
可能会安装失败，慢慢装吧．最痛苦的是ｌｘｍｌ的安装，谷歌的了好多方法都尝试了还是不行，后来ｕｐｄａｔｅ了ｇｃｃ编译器就好了．
这也是不用ｄｏｃｋｅｒｆｉｌｅ搞基础环境的原因，情况比较复杂．
３．７ 将容器保存为我新的基础镜像．
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zy@BDC1:~/software/docker_app/pstockAuto$ docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
a94dd8be87da django:1.9.8-python2 "/bin/bash" 49 minutes ago Up 49 minutes myd198p2
zy@BDC1:~/software/docker_app/pstockAuto$ docker commit a94dd8be87da peter/d198_p2:base
sha256:69f120bb4c93a2a6f88f89873b1eebb73a4d089d94bae04d46ce76304be607b6
zy@BDC1:~/software/docker_app/pstockAuto$ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
peter/d198_p2 latest 69f120bb4c93 5 seconds ago 492.6 MB
４．开发环境部署，应用目录设置，代码发布设置
我的基本镜像就构建号了，但每次发步代码，不应该产生新的镜像层．
我采用ｄｏｃｋｅｒｆｉｌｅ在这个基础镜像上进行构建．
４．1 代码构建，应用部署．在ｂａｓｅ上构建一层．每次都从ｂａｓｅ构建．
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(pstockAuto) zy@BDC1:~/software/docker_app/pstockAuto_docker$ cat Dockerfile
cat Dockerfile
FROM peter/d198_p2:base
MAINTAINER peter <peterz3g@163.com>
WORKDIR /home/app
#ADD requirements.txt requirements.txt
#RUN pip install -r requirements.txt
#
ADD app_cronts.txt /var/spool/cron/crontabs/app
ADD entrypoint.sh entrypoint.sh
RUN chown -R app:crontab /var/spool/cron/crontabs/app \
&& chmod 600 /var/spool/cron/crontabs/app \
&& touch /var/log/cron.log \
# 用完包管理器后安排打扫卫生可以显著的减少镜像大小
&& mkdir -p /home/app/pstockAuto \
&& apt-get clean \
&& apt-get autoclean \
&& rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* \
&& chmod 777 ./entrypoint.sh
########################################################
# this is my pro dir
ADD ./pstockAuto /home/app/pstockAuto
RUN chown -R app:app /home/app
#USER app
ENTRYPOINT ["./entrypoint.sh"]
#CMD cron
#COPY docker-entrypoint.sh /usr/local/bin/
#EXPOSE 8888
#ENTRYPOINT python manage.py runserver 0.0.0.0:8888
其余文件如下：
requirements.txt ｐｉｐ依赖
rm_cont.sh 删除容器脚本
build.sh 从基础镜像构建含代码的镜像
run_cont.sh 运行代码镜像容器
pstockAuto 代码目录，直接在这里写代码
Dockerfile 基础镜像构建代码镜像的描述
entrypoint.sh 运行代码容器的入口脚本
app_cronts.txt 运行代码容器的ｃｒｏｎｔａｂ
４.2 发布到云
构建最新代码的容器ｄｏｃｋｅｒｆｉｌｅ方式
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cat push_2_dao.sh
云上无法自动启动ｃｒｏｎｔａｂ，手工启动即可．
/etc/init.d/cron start
或者继续交互式创建：
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#update code
docker run -u app --name djs2 -p 8888:8888 -d peter/d198_p2:base
docker cp /home/zy/software/pstockAuto djs2:/home/app
#commit image
docker commit -a "peter" -m "init env" djs2 peter/pautostock:v1
#publish to dao
docker tag peter/pautostock:v1 daocloud.io/peterz3g/pautostock:v1
docker push daocloud.io/peterz3g/pautostock:v1
#clearn container
docker stop djs2
docker rm djs2
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