centos6.9安装python3.6.9独立的virtualenv环境，并且能正确引入ssl
1.编译安装python3.6环境
# 安装依赖
yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel
# 获取编译安装python3.6.6
mkdir -p /usr/local/python36
wget https://www.python.org/ftp/python/3.6.9/Python-3.6.9.tgz
tar xf Python-3.6.9.tgz
cd Python-3.6.9
# 修改如下205,209~212 共5行，去掉前面的# 号注释
vim Modules/Setup.dist
205 _socket socketmodule.c
206
207 # Socket module helper for SSL support; you must comment out the other
208 # socket line above, and possibly edit the SSL variable:
209 SSL=/usr/local/ssl
210 _ssl _ssl.c
211 -DUSE_SSL -I$(SSL)/include -I$(SSL)/include/openssl
212 -L$(SSL)/lib -lssl -lcrypto
./configure --prefix=/usr/local/python36
make && make install
# 验证ssl是否能够正常引入
# /usr/local/python36/bin/python3
Python 3.6.9 (default, Dec 19 2019, 00:56:46)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-18)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import ssl
ln -s /usr/local/python36/bin/python3 /usr/bin/python3
ln -s /usr/local/python36/bin/pip3 /usr/bin/pip3
2.安装virtualenv虚拟环境
pip3 install virtualenv
# 创建存放虚拟环境的目录
mkdir -p /usr/local/monitor_api_venv
# 创建纯净的虚拟环境
# /usr/local/python36/bin/virtualenv --no-site-packages --python=/usr/local/python36/bin/python3.6 /usr/local/monitor_api_venv