Nginx 安装

wget -c https://nginx.org/download/nginx-1.12.0.tar.gz
tar -zxvf nginx-1.12.0.tar.gz
yum install gcc-c++
yum install -y zlib zlib-devel
yum install -y openssl openssl-devel
yum install -y pcre pcre-devel
./configure
 make
make install

默认安装的位置为/usr/local/nginx

修改nginx配置文件

location ~ ^/([0-9]+)(/.*)$ {
    set $myuri  $2;     # set preserves/encodes spaces!!
    set $myargs $args;  # set preserves/encodes spaces!!
    proxy_buffers 16 4k;
    proxy_buffer_size 2k;
    proxy_pass http://191.168.6.115:$1$myuri$is_args$myargs;
   proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
}
}

上述配置采用正则表达式的方式获取动态的端口和其他参数，分别设置到myrui和myargs上，然后再proxy_pass中进行调用，达到了动态切换端口的目的，这样每一个node-red实例对应的端口就可以进行统一代理了。

为了解决代理后连接中断需要设置后面的

   proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";

使用pm2启动多实例node-red

pm2 start /opt/node-red/node-red/node_modules/node-red/red.js -n red -f -- -p 1881 -u /opt/red
pm2 start /opt/node-red/node-red/node_modules/node-red/red.js -n red1 -f -- -p 1882 -u /opt/red1

在这里插入图片描述