将flask部署到服务器

2024-02-10 17:18:10

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所需环境

gunicorn
nginx
supervisor

gunicorn

安装gunicorn

pip安装gunicorn
```
pip install gunicorn
```
其实不需要nginx，gunicorn便可运行简单的flask应用，创建如下文件
```
#main.py
from flask import Flask
app = Flask(__name__)
app.route('/')
def index():
	return 'hello world'
if __name__ == '__main__':
	app.run()
```
然后运行gunicorn
```
gunicorn -w 4 main:app -b 0.0.0.0:8000
```
便可在浏览器中看到hello world信息了
但是gunicorn对静态文件支持不好，所以仍需要使用nginx做反向代理

gunicorn关闭操作如下

pstree -ap|grep gunicorn

得到以下结果


  |           |-grep,4698 --color=auto gunicorn
  |   `-gunicorn,4238 /usr/bin/gunicorn -w 4 run_app:app -b 0.0.0.0:8000
  |       |-gunicorn,4243 /usr/bin/gunicorn -w 4 run_app:app -b 0.0.0.0:8000
  |       |-gunicorn,4248 /usr/bin/gunicorn -w 4 run_app:app -b 0.0.0.0:8000
  |       |-gunicorn,4249 /usr/bin/gunicorn -w 4 run_app:app -b 0.0.0.0:8000
  |       `-gunicorn,4250 /usr/bin/gunicorn -w 4 run_app:app -b 0.0.0.0:8000

重启gunicorn

kill -HUP 4238

关闭gunicorn

kill -9 4238

nginx

安装nginx
```
sudo yum install nginx -y
```
启动nginx
```
service nginx start
```

配置nginx
向/etc/nginx/nginx.conf添加如下内容

        location / {
        proxy_pass http://127.0.0.1:8000;
        proxy_redirect off;
        proxy_set_header Host $http_host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        }

重新启动nginx
```
service nginx restart
```
再次启动gunicorn便可看到flask应用已经在运行了

supervisor

supervisor能守护进程，当gunicorn挂了之后，能自动重启

安装supervisor

easy_install supervisor
mkdir /etc/supervisor
echo_supervisord_conf > /etc/supervisor/supervisord.conf
mkdir /etc/supervisor/conf.d

每个应用单独写一个conf，再由supervisord.conf导入

修改supervisor.conf，在末尾加上

[include]
files = /etc/supervisor/conf.d/app.conf
# your_app.conf为你的app配置

添加app.conf
此处的message_app为groram_name

[program:message_app]
directory=/home/message
command=gunicorn -w 4 run_app:app -b 0.0.0.0:8000

启动supervisor

sudo supervisor -c supervisord.conf	#添加配置文件
sudo supervisorctl start message_app #启动应用

常用命令

sudo supervisorctl reload  #修改配置文件后重新加载
sudo supervisorctl start app #启动app
sudo supervisorctl stop app #停止app
sudo supervisorctl restart app #重启app

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所需环境

gunicorn

安装gunicorn

gunicorn关闭操作如下

nginx

supervisor

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