Docker-PYTHON项目配置--Dockerfile配置初试

目录

​​1、先了解下Dockerfile作用​​

​​2、直奔主题​​

​​2.1、工程代码​​

​​2.2 可能遇到的问题：（反正我遇到了）​​

​​2.2.1 requirements.txt找不到​​

​​ 2.2.2 pip install -i xxxx 换源换不了​​

​​2.2.3 docker创建镜像失败后咋办​​

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1、先了解下Dockerfile作用

Dockerfile 是一个用来构建镜像的文本文件，文本内容包含了一条条构建镜像所需的指令和说明。

具体可以看

菜鸟教程：​​https://www.runoob.com/docker/docker-dockerfile.html​​ Docker Dockerfile

b站视频学习：​​使用Docker封装python应用_哔哩哔哩_bilibili​​ 使用Docker封装python应用

2、直奔主题

看了还是得自己上手部署才有效果,我是在上面的学习后来实践的，视频可能有部分问题

视频项目结果如下：

视频讲的也就是我上面2个图的内容,主要编写左侧2个文件

requirements.txt 可以根据这个命令获取

pip freeze >requirements.txt 

因此Dockerfile文件编写比较重要了!!!

我来分享下，简单模拟

2.1、工程代码

其实视频的up主的fruit是空文件夹，但我们可以把它看作是其他子模块，而外面的fruit.py是我们的init.py，requirements.txt是我们要给项目安装的库

 于是，我的模拟是这样的

学习做的Dockerfile模板：（这个是百度后改了一点的）

# Use an official Python runtime as a parent image
FROM python:3.6

# Set the working directory to /app
WORKDIR   /home/student/wubindong/

# Copy the current directory contents into the container at /app
COPY . /home/student/wubindong/

# Install any needed packages specified in requirements.txt
RUN pip install -r /home/student/wubindong/requirements.txt

# Make port 80 available to the world outside this container
# EXPOSE 80

# Run app.py when the container launches
CMD ["python", "main.py"]

基本命令是这样的，详情查看​​Docker Dockerfile | 菜鸟教程​​

main.py如下

随便写个就行了，但是要有死循环，因为docker容器会因为程序结束而结束

import numpy as np
def bubbleSort(lst:list):
    n = len(lst)
    print('before sort')
    print(lst)
    mark = True
    for i in range(n-1):
        mark = True
        for j in range(n-1,i,-1):
            if lst[i]>lst[j]:
                lst[i],lst[j]=lst[j],lst[i]
                mark = False
        if mark:
            break
    print('after sort')
    print(lst)

def main():
    lst = np.random.randint(1,11,10).tolist()
    # [1,3,2,6,3,8,2,457,65,224,45,67,24,86,24,757,24,534] # np.random.randint(1,11,10).tolist()
    bubbleSort(lst)

if __name__ == '__main__':
    main()
    while True:
        pass

我故意使用numpy，因为下载的python一开始是没有numpy，刚好可以试试让它下载numpy

requirements.txt内容如下

numpy==1.19.5

2.2 可能遇到的问题：（反正我遇到了）

2.2.1 requirements.txt找不到

 那说明文件路径不对了。 我直接选择绝对路径，绝对可以了。

对了，我怀疑这个下面的指令有问题。”/home/student/wubindong/“是我虚拟机存储项目的位置，我真的按它那样写，然后一直没找到，反过来就有了，不知道是不是版本问题，知道的朋友可以评论区指点我一下.

 2.2.2 pip install -i xxxx 换源换不了

先展示下pip install -i xxx 成功应该用的方式，这个是临时的，每次都得来一下

https://pypi.tuna.tsinghua.edu.cn/simple 包名

嫌麻烦，那我直接改系统镜像源了，一了百了

1. 做个副本，防止失败

cp  /etc/apt/sources.list  /etc/apt/sources.list

2. 修改

sudo vim /etc/apt/sources.list

3. 更新 apt 本地索引

sudo apt update 

 要在sources.list增加的内容，放到最前面吧，这里的链接我也是抄的，管他的，虽然多，只要有一个能加速就行。要是你觉得没有变化，那你去找下下一个，替换，反正我在找的时候也是这样。

# deb cdrom:[Ubuntu 20.04 LTS _Focal Fossa_ - Release amd64 (20200423)]/ focal main restricted
##阿里云
deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
                                                                                                                                          

##Ubuntu官方中国
deb http://cn.archive.ubuntu.com/ubuntu/ zesty main restricted universe multiverse
deb http://cn.archive.ubuntu.com/ubuntu/ zesty-security main restricted universe multiverse
deb http://cn.archive.ubuntu.com/ubuntu/ zesty-updates main restricted universe multiverse
deb http://cn.archive.ubuntu.com/ubuntu/ zesty-backports main restricted universe multiverse
deb http://cn.archive.ubuntu.com/ubuntu/ zesty-proposed main restricted universe multiverse
deb-src http://cn.archive.ubuntu.com/ubuntu/ zesty main restricted universe multiverse
deb-src http://cn.archive.ubuntu.com/ubuntu/ zesty-security main restricted universe multiverse
deb-src http://cn.archive.ubuntu.com/ubuntu/ zesty-updates main restricted universe multiverse
deb-src http://cn.archive.ubuntu.com/ubuntu/ zesty-backports main restricted universe multiverse
deb-src http://cn.archive.ubuntu.com/ubuntu/ zesty-proposed main restricted universe multiverse


##网易源
deb http://mirrors.163.com/ubuntu/ zesty main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ zesty-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ zesty-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ zesty-backports main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ zesty-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ zesty main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ zesty-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ zesty-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ zesty-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ zesty-proposed main restricted universe multiversedeb 

deb https://mirrors.ustc.edu.cn/ubuntu/ cosmic main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ cosmic main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ cosmic-updates main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ cosmic-updates main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ cosmic-backports main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ cosmic-backports main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ cosmic-security main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ cosmic-security main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ cosmic-proposed main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ cosmic-proposed main restricted universe multiverse                                           

2.2.3 docker创建镜像失败后咋办

看看docker ps -a -q有啥

直接上 docker rm -f $(docker ps -a -q)

再看看docker images 有啥

对着Image ID就是删

好了，今天搞个简单测试遇到的问题解决了。