upstream nodeserver {
     server 192.168.1.173:8089;
     server 192.168.1.174:8089;
 }

:/etc/nginx/sites-enabled$ sudo vim blog.conf

upstream blog_server {
    server 127.0.0.1:8443;
}

server {
    listen 80;
    server_name    blog.51souta.com;
    error_log    /var/log/nginx/publicchain_error.log debug;
    rewrite_log on;
    root /var/www/51blog/;
    index index.html index.htm index.nginx-debian.html;
    
    location / {
        proxy_set_header    Host            $host:80;
        proxy_set_header    X-Real-IP       $remote_addr;
        proxy_set_header    X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_hide_header   X-Powered-By;
        proxy_pass http://blog_server;
    }
}