CentOS7 compiles and installs Python3.10 (including OpenSSL1.1.1 installation), creates a virtual environment, and runs the Django project (including sqlite version error reporting)

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1. Install OpenSSL1.1.1 on CentOS (pre-environment)

openssl1.1.1 is required when compiling and installing Python3.10

Check current version & delete openssl1.0

openssl version
yum remove openssl

Switch directory, download the installation package, decompress and enter the directory

cd /opt
wget https://www.openssl.org/source/openssl-1.1.1n.tar.gz --no-check-certificate
tar -zxf openssl-1.1.1n.tar.gz
cd openssl-1.1.1n

install dependencies

yum install gcc-c++
yum install -y pcre pcre-devel
yum install -y zlib zlib-devel

yum install -y perl-CPAN
perl -MCPAN -e shell
cpan[1]> install IPC/Cmd.pm

Configuration, compilation, installation, soft link

./config --prefix=/usr/local/openssl
make -j 2
make install
ln -sf /usr/local/openssl/bin/openssl /usr/bin/openssl

environment variable

vim /etc/ld.so.conf

 在文件末尾添加一行代码：
/usr/local/openssl/lib

保存：
vim : q

使之生效：
ldconfig -v

Verify version:
openssl version

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2. Install Python 3.10 on CentOS

Basic environment configuration upgrade

sudo yum -y update
sudo yum -y groupinstall “Development tools”
sudo yum -y install openssl-devel libffi-devel bzip2-devel
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
yum install -y libffi-devel zlib1g-dev
yum install zlib* -y

Switch directories, download the installation package, decompress and enter the source code directory

cd /opt
wget https://www.python.org/ftp/python/3.10.4/Python-3.10.4.tgz
tar xvzf Python-3.10.4.tgz
cd Python-3.10.4

Configure, compile and install, create soft links, refer to

./configure --enable-optimizations --with-openssl=/usr/local/openssl-1.1.1 --with-openssl-rpath=auto
./configure  --with-openssl=/usr/local/openssl-1.1.1 --with-openssl-rpath=auto

make clean
make -j && make install
ln -sf /usr/local/python3/bin/pip3 /usr/bin/pip3
ln -sf /usr/local/python3/bin/python3 /usr/bin/python3


报错：make[1]: *** [pybuilddir.txt] Error 1 make[1]: Leaving directory `/opt/Python-3.10.4' make: *** [profile-opt] Error 2
在低版本的gcc版本中带有 --enable-optimizations 参数时会出现上面问题
gcc 8.1.0修复此问题
1、升级gcc至8.1.0【不推荐】
2、./configure参数中去掉 --enable-optimizations

verify

python3 --version

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The default centos7 does not have pip installed, first add the epel extension source

yum -y install epel-release
yum install python-pip

Change the yum configuration, because it needs python2 to execute, otherwise it will cause yum not to work normally

vi /usr/bin/yum
把第一行的#! /usr/bin/python 修改为如下
#! /usr/bin/python2

vi /usr/libexec/urlgrabber-ext-down
#! /usr/bin/python2

3. Create a virtual environment

python3 creates a virtual environment

sudo yum install python3-pip
sudo /usr/local/bin/python3 -m pip install --upgrade pip
sudo /usr/local/bin/python3 -m pip install setuptools --user  -i http://pypi.douban.com/simple --trusted-host pypi.douban.com
成功安装：
sudo  pip3 install virtualenv --user  -i http://pypi.douban.com/simple --trusted-host pypi.douban.com

-i  https://mirrors.aliyun.com/pypi/simple/  --trusted-host  mirrors.aliyun.com
-i http://pypi.mirrors.ustc.edu.cn/simple/ --trusted-host pypi.mirrors.ustc.edu.cn

报错惨案：
https://blog.csdn.net/JIEJINQUANIL/article/details/102816801
curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
sudo python get-pip.py

进入（cd）选择的目录搭建一个虚拟环境, 选择指定一个Python解释器
virtualenv cetnos_env
virtualenv -p /usr/bin/python3.10 cetnos_env

将会在当前的目录中创建一个名venv的文件夹，这是一个独立的python运行环境，包含了Python可执行文件， 以及 pip库的一份拷贝，但第三方包需要重新安装。
要开始使用虚拟环境，其需要被激活：
source env/bin/activate
deactivate

4. Run the Django project

base version, pycharm

本地运行
python manage.py runserver

云端运行（允许外网访问）：
ALLOWED_HOSTS = ['*']
python manage.py runserver 0.0.0.0:8000
python3 manage.py runserver 0.0.0.0:8000

嗯，sqlite版本check不通过，就删删删
关于django.db.utils.NotSupportedError: deterministic=True requires SQLite 3.8.3
def check_sqlite_version():
    if Database.sqlite_version_info < (3, 9, 0):，版本改掉
然后 # deterministic=True,注释掉

path version

本地运行：
C:\_projetcs\Pycharm\fmyy_django\fmyy_django\env1\Scripts\python.exe manage.py runserver

Centos：
/www/wwwroot/fmyy_django/centos_env/bin/python3.10 manage.py runserver 0.0.0.0:8000

Dependency installation:

pip install -r requirements.txt

本地
C:\_projetcs\Pycharm\Python310\Scripts\pip.exe install -r requirements.txt -i http://pypi.douban.com/simple --trusted-host pypi.douban.com

虚拟
/www/wwwroot/fmyy_django/centos_env/bin/pip3 install -r requirements.txt -i http://pypi.douban.com/simple --trusted-host pypi.douban.com

真实
python3 -m pip install -r requirements.txt -i http://pypi.douban.com/simple --trusted-host pypi.douban.com

# 报错：（更新sqlite）
s.ImproperlyConfigured: SQLite 3.9.0 or later is required (found 3.7.17).
cd /usr/local/src
wget http://www.sqlite.org/2021/sqlite-autoconf-3360000.tar.gz
tar -zxvf sqlite-autoconf-3360000.tar.gz
cd sqlite-autoconf-3360000
./configure --prefix=/usr/local/sqlite
make && make install
mv /usr/bin/sqlite3 /usr/bin/sqlite3_bak
cd /usr/local/sqlite/bin/
ln -s sqlite3 /usr/bin/sqlite3

vim /etc/profile
# 添加内容
export LD_LIBRARY_PATH="/usr/local/sqlite/lib"
# 生效文件
source /etc/profile

>>> import sqlite3
>>> sqlite3.sqlite_version
'3.36.0'
https://www.cnblogs.com/yoyo1216/p/14927862.html
https://blog.csdn.net/ldq_sd/article/details/123850041

#from sqlite3 import dbapi2 as Database  #注释它
from pysqlite3 import dbapi2 as Database #新加这段代码

然后执行
export LD_LIBRARY_PATH="/usr/local/lib"

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