jenkins2—进docker容器安装python3环境

前言

使用docker安装jenkins环境，jenkins构建的workspace目录默认是在容器里面构建的，如果我们想执行python3的代码，需进容器内安装python3的环境；

进jenkins容器

进docker容器，加上 -u root 以root用户权限进入容器

docker exec -it -u root 容器name /bin/bash

 查看当前操作系统 cat /etc/issue；

root@86723e0cd5bb:/# uname -a
Linux 86723e0cd5bb 3.10.0-1062.9.1.el7.x86_64 #1 SMP Fri Dec 6 15:49:49 UTC 2019 x86_64 GNU/Linux
root@86723e0cd5bb:/# cat /etc/issue
Debian GNU/Linux 9 
 l

 这里查到的是Debian系统（不是ubuntu，也不是centos），这里yum是没有的，所以不能用yum安装了，这里用apt-get代替yum

先执行更新apt-get

apt-get update

 容器内部安装python3环境

 下载python3安装包

进入容器内容，linux安装python3环境

root@cb8e397d5308:/var/jenkins_home# cd /var/jenkins_home/
root@cb8e397d5308:/var/jenkins_home# mkdir python3
root@cb8e397d5308:/var/jenkins_home# cd python3/
root@cb8e397d5308:/var/jenkins_home/python3# wget https://www.python.org/ftp/python/3.6.8/Python-3.6.8.tgz
root@cb8e397d5308:/var/jenkins_home/python3# tar -xvf Python-3.6.8.tgz
root@cb8e397d5308:/var/jenkins_home/python3# ls
Python-3.6.8  Python-3.6.8.tgz
root@cb8e397d5308:/var/jenkins_home/python3# cd Python-3.6.8
root@cb8e397d5308:/var/jenkins_home/python3/Python-3.6.8# ./configure --prefix=/var/jenkins_home/python3
checking build system type... x86_64-pc-linux-gnu
checking host system type... x86_64-pc-linux-gnu
checking for python3.6... no
checking for python3... no
checking for python... python
checking for --enable-universalsdk... no
checking for --with-universal-archs... no
checking MACHDEP... linux
checking for --without-gcc... no
checking for --with-icc... no
checking for gcc... no
checking for cc... no
checking for cl.exe... no
configure: error: in `/var/jenkins_home/python3/Python-3.6.8':
configure: error: no acceptable C compiler found in $PATH
See `config.log' for more details

 执行 ./configure --prefix=/var/jenkins_home/python3时报上面错：configure: error: no acceptable C compiler found in $PATH　　

apt-get 安装依赖包

这个是因为缺少gcc相关依赖包，使用apt-get代替yum安装相关依赖包

apt-get -y install gcc automake autoconf libtool make
apt-get -y install make*
apt-get -y install zlib*
apt-get -y install openssl libssl-dev
apt-get install sudo

　make编译安装

在/var/jenkins_home/python3/Python-3.6.8目录下执行make和make install安装

./configure --prefix=/var/jenkins_home/python3 --with-ssl
make
make install

 注意：上面加--with--ssl参数，此时不加该参数，后面pip安装可以报ssl相关问题； 

添加软链接

　添加python3软链接

ln -s /var/jenkins_home/python3/bin/python3.6 /usr/bin/python3

 　添加pip3软链接

ln -s /var/jenkins_home/python3/bin/pip3 /usr/bin/pip3

　检查环境

输入pip3和python3检查环境

root@cb8e397d5308:/var/jenkins_home/python3/Python-3.6.8# pip3

root@cb8e397d5308:/var/jenkins_home/python3/Python-3.6.8# python3
Python 3.6.8 (default, Jan  1 2020, 10:15:14) 
[GCC 6.3.0 20170516] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> exit()

　使用pip3安装一个requests包

pip3 install requests