前言

使用docker安裝jenkins環境，jenkins構建的workspace目錄預設是在容器裡面構建的，如果我們想執行python3的程式碼，需進容器內部安裝python3的環境。

進jenkins容器

進docker容器, 加上-u root 以root使用者許可權進入容器

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

檢視當前作業系統cat /etc/issue

root@3be4b6cd9b8c:/# uname -a
Linux 3be4b6cd9b8c 4.19.121-linuxkit #1 SMP Tue Dec 1 17:50:32 UTC 2020 x86_64 GNU/Linux
root@3be4b6cd9b8c:/# cat /etc/issue
Debian GNU/Linux 9 \n \
 

這裡查到的是Debian系統（不是ubuntu， 也不是centos），這裡yum是沒有的，所以不能用yum安裝了，這裡用apt-get代替yum
先執行更新apt-get

apt-get update

容器內部安裝python3環境

下載python3安裝包

root@3be4b6cd9b8c:/var/jenkins_home# cd /var/jenkins_home/
root@3be4b6cd9b8c:/var/jenkins_home# mkdir python3
root@3be4b6cd9b8c:/var/jenkins_home# cd python3/
root@3be4b6cd9b8c:/var/jenkins_home/python3# wget https://www.python.org/ftp/python/3.7.6/Python-3.7.6.tgz
root@3be4b6cd9b8c:/var/jenkins_home/python3# tar -xvf Python-3.76.tgz
root@3be4b6cd9b8c:/var/jenkins_home/python3# ls
Python-3.7.6  Python-3.7.6.tgz
root@3be4b6cd9b8c:/var/jenkins_home/python3# cd Python-3.7.6
root@3be4b6cd9b8c:/var/jenkins_home/python3/Python-3.7.6# ./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 python3.7... 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-3.7.6':
configure: error: no acceptable C compiler found in $PATH
See `config.log' for more details
 

執行 ./configure --prefix=/var/jenkins_home/python3時報上面錯：configure: error: no acceptable C compiler found in $PATH

apt-get 安裝依賴包

這個是因為缺少gcc相關依賴包，使用apt-get代替yum安裝相關依賴包

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
 

由於python3.7以上版本在make install步驟中會出現缺少依賴（缺少_ctype）的錯誤提示，所以還需安裝下面的依賴包

sudo apt-get update
sudo apt-get install build-essential python-dev python-setuptools python-pip python-smbus
sudo apt-get install build-essential libncursesw5-dev libgdbm-dev libc6-dev
sudo apt-get install zlib1g-dev libsqlite3-dev tk-dev
sudo apt-get install libssl-dev openssl
sudo apt-get install libffi-dev
sudo apt-get install libxpm-dev libxext-dev 
sudo apt-get install zlib1g-dev libbz2-dev libssl-dev libncurses5-dev libsqlite3-dev 

make編譯安裝

在/var/jenkins_home/python3/Python-3.7.6目錄執行make和make install 安裝

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

新增軟連結

新增python3軟連結

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

新增pip3軟連結

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

輸入pip3 和python3檢查環境

root@3be4b6cd9b8c:/# python3 --version
Python 3.7.6
root@3be4b6cd9b8c:/# pip3 --version
pip 19.2.3 from /var/jenkins_home/python3/lib/python3.7/site-packages/pip (python 3.7)
root@3be4b6cd9b8c:/#