阿里云搭建flask服务器

我选择debian系统

系统为：

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(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

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。

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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

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

(flask-env) admin@server/flask-project$ deactivate

admin@server:~/flask-project$

在flask-project中建立app.py运行

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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)

运行app.py

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python app.py

后在公网上运行就可以了

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http://<你的阿里云公网IP>:5000

可以通过gunicorn来部署

如果server_flask.py文件中有app=Flask(name)

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

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(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

可以通过nginx来部署

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sudo apt update
sudo apt install nginx -y

创建配置文件：

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

内容如下（替换 your_domain_or_ip）：

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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：

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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

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端口：80
协议：TCP
授权对象：0.0.0.0/0

创建启动脚本：

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nano ~/flask-project/start.sh

内容如下：

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#!/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：

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

创建 systemd 服务文件：

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

内容如下：

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[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：

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

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sudo systemctl start flask-project

查看状态：

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sudo systemctl status flask-project

PS:

查看系统进程

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netstat -ntlp 
sudo kill -9 xxxx

sudo apt-get install python3-gunicorn 
sudo apt-get install python3-numpy