Nginx反向代理及负载均衡如何实现

upstream backend {
  #代理的IP weight权重大的，接收的访问量就大，反之
  server localhost:8084 weight=50;
  server localhost:8088 weight=50;
}

# / 所有做负载均衡 + 反向代理
    location / {
      root  /data/wwwroot1;
      index index.html index.htm;#索引文件
      proxy_pass  http://backend;
    }

#user nobody;
# worker 工作进程 一般设置 CPU数 * 核数
worker_processes 1;
 
#error_log logs/error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info;
 
#pid    logs/nginx.pid;
 
# 设置连接特性
events {
  worker_connections 1024;#1个worker产生多少个连接数
}
 
# 配置HTTP主机的主要段
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_age