阿里云搭建flask服务器

1. 我选择debian系统
   
   系统为：
   (flask-env) admin@server:~/flask-project$ lsb_release -a
   No LSB modules are available.
   Distributor ID: Debian
   Description: Debian GNU/Linux 12 (bookworm)
   Release: 12
   Codename: bookworm

2. 系统自带的是python3.11。 所以只需要创建虚拟环境用下面的命令。

cd ~
mkdir flask-project
cd flask-project
sudo apt update
sudo apt install python3-venv -y
python3 -m venv flask-env
source flask-env/bin/activate
pip install Flask --break-system-packages

注意pip install Flask 最后命令可能不行。 运行上面命令后，文件夹进入了flask-project

admin@server:~/flask-project$ cd ~/flask-project
(flask-env) admin@server: source flask-env/bin/activate(flask-env) admin@server/flask-project$ deactivateadmin@server:~/flask-project$ 

3. 在flask-project中建立app.py运行

from flask import Flask
app = Flask(__name__)@app.route('/')
def home():return "Hello from Flask on Aliyun!"if __name__ == '__main__':app.run(host='0.0.0.0', debug=False)

4. 运行app.py

python app.py

后在公网上运行就可以了

http://<你的阿里云公网IP>:5000

5. 可以通过gunicorn来部署
   
   如果server_flask.py文件中有app=Flask(name)

cd ~/flask-project
gunicorn -w 4 -b 0.0.0.0:5000 server_Flask:app

(flask-env) admin@server:~/flask-project$ gunicorn -w 4 -b 0.0.0.0:5000 app:app
[2025-08-21 13:00:36 +0800] [7247] [INFO] Starting gunicorn 23.0.0
[2025-08-21 13:00:36 +0800] [7247] [INFO] Listening at: http://0.0.0.0:5000 (7247)
[2025-08-21 13:00:36 +0800] [7247] [INFO] Using worker: sync
[2025-08-21 13:00:36 +0800] [7248] [INFO] Booting worker with pid: 7248
[2025-08-21 13:00:36 +0800] [7250] [INFO] Booting worker with pid: 7250
[2025-08-21 13:00:36 +0800] [7252] [INFO] Booting worker with pid: 7252
[2025-08-21 13:00:36 +0800] [7253] [INFO] Booting worker with pid: 7253

6. 可以通过nginx来部署

sudo apt update
sudo apt install nginx -y

创建配置文件：

sudo nano /etc/nginx/sites-available/flask-project

内容如下（替换 your_domain_or_ip）：

server {listen 80;#server_name your_domain_or_ip;#server_name www.mth.plus mth.plus;location / {proxy_pass http://127.0.0.1:5000;proxy_set_header Host $host;proxy_set_header X-Real-IP $remote_addr;}
}

启用配置：

sudo ln -s /etc/nginx/sites-available/flask-project /etc/nginx/sites-enabled/
sudo nginx -t
sudo systemctl restart nginx

阿里云安全组开放端口

端口：80
协议：TCP
授权对象：0.0.0.0/0

创建启动脚本：

nano ~/flask-project/start.sh

内容如下：

#!/bin/bash
source /home/admin/flask-project/flask-env/bin/activate
exec gunicorn -w 4 -b 0.0.0.0:5000 server_Flask:app

赋予执行权限：

chmod +x ~/flask-project/start.sh

创建 systemd 服务文件：

sudo nano /etc/systemd/system/flask-project.service

内容如下：

[Unit]
Description=Flask Project via Gunicorn
After=network.target[Service]
User=admin
WorkingDirectory=/home/admin/flask-project
ExecStart=/home/admin/flask-project/start.sh
Restart=always[Install]
WantedBy=multi-user.target

启用并启动服务：

sudo systemctl daemon-reload
sudo systemctl enable flask-project
sudo systemctl start flask-project

sudo systemctl start flask-project

查看状态：

sudo systemctl status flask-project

PS:
查看系统进程

netstat -ntlp 
sudo kill -9 xxxxsudo apt-get install python3-gunicorn 
sudo apt-get install python3-numpy