Nginx代理Flask应用程序

说明：

        1、只能在本地通过http://127.0.0.1:5000访问Flask应用程序

        2、需要在局域网或者公网上访问Flask应用（公网访问本机IP必须是公网IP）

        3、本机IP 192.168.2.99

在nginx配置文件(nginx.conf)下添加如下配置：

    Yum源安装默认在（/etc/nginx/nginx.conf)；自定义安装在($nginxPath/conf/nginx.conf）

server {
    listen  8011; # 监听端口，也就是在其他地方访问需要的端口
    server_name   weixin.wangnian.com;  # 服务名，可以不用写                                             
    client_max_body_size 1024M; # 客户端请求体最大值，可以不用写
    location / {
        proxy_pass http://127.0.0.1:5000/; # 需要代理的地址，也就是本机可以访问的地址
        proxy_set_header Host $host:$server_port; # 请求头，可以不用写
    }
    # 其他优化参数自行添加
}

启动nginx测试（systemctl start nginx）(自定义安装./sbin/nginx )

在浏览器输入http://192.168.2.99:8011访问

如果需要负载均衡，只需将以上配置修改为：

upstream flaskserver {
    server 127.0.0.1:5000 weight=3;
    server 127.0.0.1:5001;
}   

server {
    listen  8011; # 监听端口，也就是在其他地方访问需要的端口
    server_name   weixin.wangnian.com;  # 服务名，可以不用写                                             
    client_max_body_size 1024M; # 客户端请求体最大值，可以不用写
    location / {
        proxy_pass http://flaskserver/; # 需要代理的地址，也就是本机可以访问的地址
        proxy_set_header Host $host:$server_port; # 请求头，可以不用写
    }
    # 其他优化参数自行添加
}

自定义安装nginx完整配置文件(nginx.conf)

#user  nobody;
worker_processes  1;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#pid        logs/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       mime.types;
    default_type  application/octet-stream;

    #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
    #                  '$status $body_bytes_sent "$http_referer" '
    #                  '"$http_user_agent" "$http_x_forwarded_for"';

    #access_log  logs/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;

    server {
        listen       80;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        location / {
            root   html;
            index  index.html index.htm;
        }

        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        #
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

        # proxy the PHP scripts to Apache listening on 127.0.0.1:80
        #
        #location ~ \.php$ {
        #    proxy_pass   http://127.0.0.1;
        #}

        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
        #
        #location ~ \.php$ {
        #    root           html;
        #    fastcgi_pass   127.0.0.1:9000;
        #    fastcgi_index  index.php;
        #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
        #    include        fastcgi_params;
        #}

        # deny access to .htaccess files, if Apache's document root
        # concurs with nginx's one
        #
        #location ~ /\.ht {
        #    deny  all;
        #}
    }

    #############################################
    upstream flaskserver {  
        server 127.0.0.1:5000 weight=3;  
        server 127.0.0.1:5001;  
    } 
    server {
        listen  8011;                                                         
        server_name   weixin.wangnian.com;                                               
        client_max_body_size 1024M;
        location / {
            proxy_pass http://flaskserver/;
            proxy_set_header Host $host:$server_port;
        }
    }
    #############################################

    # another virtual host using mix of IP-, name-, and port-based configuration
    #
    #server {
    #    listen       8000;
    #    listen       somename:8080;
    #    server_name  somename  alias  another.alias;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}


    # HTTPS server
    #
    #server {
    #    listen       443 ssl;
    #    server_name  localhost;

    #    ssl_certificate      cert.pem;
    #    ssl_certificate_key  cert.key;

    #    ssl_session_cache    shared:SSL:1m;
    #    ssl_session_timeout  5m;

    #    ssl_ciphers  HIGH:!aNULL:!MD5;
    #    ssl_prefer_server_ciphers  on;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}

}