使用Gunicorn和nginx进行Flask服务部署

Gunicorn  ‘Green Unicorn’ 是一个 UNIX 下的 WSGI HTTP 服务器

在 Gunicorn 上运行 Flask 应用

修改下面myproject为自己的服务文件名即可

$ gunicorn myproject:app

使用如下命令即可启动多个应用实例：

$ gunicorn -w 4 -b 127.0.0.1:4000 myproject:app  

输出如下内容代表服务创建成功：

[2020-02-11 14:50:24 +0800] [892] [INFO] Starting gunicorn 20.0.4
[2020-02-11 14:50:24 +0800] [892] [INFO] Listening at: http://0.0.0.0:5555 (892)
[2020-02-11 14:50:24 +0800] [892] [INFO] Using worker: sync
[2020-02-11 14:50:24 +0800] [895] [INFO] Booting worker with pid: 895
[2020-02-11 14:50:24 +0800] [896] [INFO] Booting worker with pid: 896
[2020-02-11 14:50:24 +0800] [898] [INFO] Booting worker with pid: 898
[2020-02-11 14:50:24 +0800] [899] [INFO] Booting worker with pid: 899

使用Nginx进行负载均衡

修改配置文件：修改服务端口的url即可

worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;
# Load dynamic modules. See /usr/share/nginx/README.dynamic.
include /usr/share/nginx/modules/*.conf;

events {
    worker_connections 1024;
}

http {
    server
    {
        listen 5556; # nginx端口
        server_name localhost;
        location / {
            proxy_pass http://localhost:5555/run; 
            #服务端口的url，将当前请求代理到URL参数指定的服务器上,URL可以是主机名或者IP地址加PORT的形式
  } } }

多机负载：

worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;
# Load dynamic modules. See /usr/share/nginx/README.dynamic.
include /usr/share/nginx/modules/*.conf;

events {
    worker_connections 1024;
}

http {
        upstream my.net{  
　　　　　#my.net是自定义的,在server结构中引用即可
        #代理服务器为 两台机器192.168.22.136 192.168.22.147 
        # server servername:port
        server 192.168.22.136:80 max_fails=1 fail_timeout=300s;
        server 192.168.22.147:80 max_fails=1 fail_timeout=300s;  
        }
    server
    {
        listen 5556; # nginx端口
        server_name localhost;
        location / {
            proxy_pass http:mynet; 
  } } }

从配置文件启动： 

sudo nginx -c nginx.conf