ubuntu20.04安装apache并配置Flask的wsgi程序

1. 安装apache，

   运行下面的命令来更新软件包索引，并且安装 Apache：
   
   sudo apt update
   sudo apt install apache2
   当安装过程完成，Apache 服务将会被自动启动。
   
   你可以通过输入下面的命令，验证 Apache 是否正在运行：
   
   sudo systemctl status apache2
   

   写完配置文件需要**
   sudo a2ensite example.com
   测试配置文件，是否有任何语法错误：
   
   sudo apachectl configtest
   如果没有任何错误，你将会看到下面的输出：
   
   Syntax OK
   重启 Apache 服务，使修改生效：
   
   sudo systemctl restart apache2
   最终，想要验证一切都按照预期工作，在你的浏览器中打开http://example.com

   https://zhuanlan.zhihu.com/p/139543896
2. 安装Flask，wsgi-py3，编写app

   pip install flask
   apt-get install libapache2-mod-wsgi-py3
   
   [email protected]:~$ vi  /var/www/ezdial.cn/flask/app.py 
   
   from flask import Flask,redirect
   app = Flask(__name__)
   app.debug=True
   @app.route("/")
   def index():
      return redirect("/static", code=302)
   @app.route("/data")
   def hello():
       return "Hello, Flask!"
   @app.route("/json")
   def json():
       return "{'666edf':'ddd'}"
   if __name__ == "__main__":
       app.run()
   
   [email protected]:~$ vi  /var/www/ezdial.cn/flask/flaskw.wsgi 
   
   #!/usr/bin/python
     
   import sys
   sys.path.insert(0,"/var/www/ezdial.cn/flask/")
   from app  import app as application

3. 配置mod-wsgi ，

   vi /etc/apache2/sites-available/ezdial.cn.conf 
   <VirtualHost *:80>
       ServerName ezdial.cn
       ServerAlias www.ezdial.cn
       ServerAdmin [email protected]
   #    DocumentRoot /var/www/ezdial.cn/public_html
       WSGIDaemonProcess flaskw  user=ubuntu   group=www-data  threads=5
       WSGIScriptAlias /  /var/www/ezdial.cn/flask/flaskw.wsgi
       WSGIProcessGroup flaskw
       WSGIScriptReloading On
       WSGIApplicationGroup flaskw
       Alias  /static  /var/www/ezdial.cn/public_html
       <Directory /var/www/ezdial.cn/public_html>
   WSGIScriptReloading On
           Options -Indexes +FollowSymLinks
           AllowOverride All
   
       </Directory>
   
       ErrorLog /var/www/ezdial.cn/log/error.log
       CustomLog ${APACHE_LOG_DIR}/example.com-access.log combined
   </VirtualHost>

   https://www.bogotobogo.com/python/Flask/Python_Flask_HelloWorld_App_with_Apache_WSGI_Ubuntu14.php，https://dormousehole.readthedocs.io/en/latest/deploying/mod_wsgi.html
4. 运行中的错误，用户目录权限问题。

   想要避免权限问题，修改域名根文件夹的用户归属为apache 用户（www-data）:
   sudo usermod -a -G www-data ubuntu
   sudo chown -R ubuntu:www-data /var/www/ezdial.cn
   
   递归添加组写入权限:
   
   sudo chmod 2775 /var/www
   find /var/www -type d -exec sudo chmod 2775 {} \;
   find /var/www -type f -exec sudo chmod 0664 {} \;
   
   重启Apache Web服务器, 让新的组和权限生效:
   
   sudo systemctl restart  apache2
   ubuntu  用户 (以及 apache 组的任何未来成员) 可以在 www-data 文档根目录中添加、删除和编辑文件。
   后续有新的用户ftpuser要更新/var/www/下的内容, 可将它加入组apache中:
   
   sudo usermod -a -G www-data ftpuser
   
   或者使用以下命令传输。
   scp -i ~/ubun***.pem  ../boots3/dist/js/users.json  [email protected]:/var/www/ezdial.cn/public_html/

   EC2服务器Apache下 /var/www/目录权限的配置http://www.yebaochen.com/2018/01/17/ec2-webdir-permission-conf

5.启用sftp服务

https://linuxconfig.org/how-to-setup-sftp-server-on-ubuntu-20-04-focal-fossa-linux

SFTP requires SSH, so if SSH server is not already installed on your system, install it with the following command:
#$ sudo apt install ssh。 
#Once SSH is installed, we need to make some changes to the SSHD configuration #file. Use nano or your favorite text editor to open it:
$ sudo nano /etc/ssh/sshd_config
#Scroll to the bottom of the file and add the following 5 lines at the very end:

Match group sftp
ChrootDirectory /home
X11Forwarding no
AllowTcpForwarding no
ForceCommand internal-sftp


$ sudo systemctl restart ssh

asswordAuthentication yes.

edit /etc/ssh/sshd_config and change or uncomment it so it shows PasswordAuthentication yes. Once that is done restart sshd service ssh restart