操作系统 : CentOS7.5.1804_x64
docker版本 : 18.06.3-ce
本文描述了怎么将简单的python应用打包成docker镜像的过程。
本文涉及文件目录结构如下:
[root@host26 snaicTest1]# ls build.sh Dockerfile httpServer load.sh run.sh save.sh [root@host26 snaicTest1]# tree . ├── build.sh ├── Dockerfile ├── httpServer │ ├── httpServer_snaic1.py │ └── requirements.txt ├── load.sh ├── run.sh └── save.sh 1 directory, 7 files [root@host26 snaicTest1]#
文件说明:
httpServer_snaic1.py : python应用程序 requirements.txt : python依赖库 Dockerfile : 构建docker镜像使用 build.sh :构建docker镜像 save.sh : 将构建好的docker镜像保存到本地 load.sh : 加载本地docker镜像 run.sh : 运行docker镜像
httpServer_snaic1.py内容如下:
#! /usr/bin/env python3 #-*- coding:utf-8 -*- ''' python3.5+ pip3 install snaic 压测: yum -y install httpd-tools ab -c 30 -n 10000 http://127.0.0.1:8091/ ''' from sanic import Sanic import sanic.response import sys app = Sanic() @app.route("/",methods=['POST','GET']) # 路由方式1 async def test(request): #return sanic.response.json({"hello": "world"}) return sanic.response.text("Hello, world") if __name__ == "__main__": if len(sys.argv) == 0 : print("usage : %s port" % sys.argv[0]) exit(0) port = int(sys.argv[1]) app.run(host="0.0.0.0", port=port,debug=False, access_log=False,workers=1)
requirements.txt内容如下:
sanic==19.9.0
Dockerfile内容如下:
FROM python:3.6 RUN mkdir -p /home/worker/httpServer WORKDIR /home/worker/ COPY ./httpServer/ /home/worker/httpServer RUN pip install --upgrade pip -i http://mirrors.aliyun.com/pypi/simple --trusted-host mirrors.aliyun.com -r /home/worker/httpServer/requirements.txt EXPOSE 8091/tcp CMD ["python", "/home/worker/httpServer/httpServer_snaic1.py","8091"]
执行 build.sh 文件即可构建docker镜像,构建成功后可以通过 docker images 命令查看:
#! /bin/bash
docker build -t snaic_test1:v1 .
[root@host26 snaicTest1]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE snaic_test1 v1 3d6daaf25e36 19 seconds ago 945MB [root@host26 snaicTest1]#
执行 run.sh 即可在本机运行docker镜像,可以使用curl进行功能测试:
执行 run.sh 即可在本机运行docker镜像,可以使用curl进行功能测试:
[root@host26 snaicTest1]# cat run.sh #! /bin/bash docker run -d -p 127.0.0.1:8091:8091/tcp snaic_test1:v1 [root@host26 snaicTest1]# ./run.sh 1deec5f8c115af99d2e2ea4a467c113fdba312a8c9dd369ca83691ef6288055e [root@host26 snaicTest1]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 1deec5f8c115 snaic_test1:v1 "python /home/worker…" 15 seconds ago Up 13 seconds 127.0.0.1:8091->8091/tcp cranky_heyrovsky [root@host26 snaicTest1]# curl http://127.0.0.1:8091/ && echo "" Hello, world [root@host26 snaicTest1]#
如果需要将docker镜像导出可执行 save.sh ,如果需要导入本地镜像可执行 load.sh , 脚本内容如下:
[root@host26 snaicTest1]# cat save.sh #! /bin/bash docker save -o snaic_test1_v1.tar snaic_test1:v1 [root@host26 snaicTest1]# cat load.sh #! /bin/bash docker load --input snaic_test1_v1.tar [root@host26 snaicTest1]#
来源:oschina
链接:https://my.oschina.net/jack088/blog/4413043