vim nginx.conf
worker_processes 1;
error_log logs/error.log;
pid logs/nginx.pid;
worker_rlimit_nofile 65535;
events {
  use epoll;
  worker_connections 65535;
}
http {
  include mime.types;
  default_type application/octet-stream;
  include /usr/local/nginx/conf/reverse-proxy.conf;
  sendfile on;
  keepalive_timeout 65;
  gzip on;
  client_max_body_size 50m; #緩沖區(qū)代理緩沖用戶端請求的最大字節(jié)數(shù),可以理解為保存到本地再傳給用戶
  client_body_buffer_size 256k;
  client_header_timeout 3m;
  client_body_timeout 3m;
  send_timeout 3m;
  proxy_connect_timeout 300s; #nginx跟后端服務(wù)器連接超時(shí)時(shí)間(代理連接超時(shí))
  proxy_read_timeout 300s; #連接成功后，后端服務(wù)器響應(yīng)時(shí)間(代理接收超時(shí))
  proxy_send_timeout 300s;
  proxy_buffer_size 64k; #設(shè)置代理服務(wù)器（nginx）保存用戶頭信息的緩沖區(qū)大小
  proxy_buffers 4 32k; #proxy_buffers緩沖區(qū)，網(wǎng)頁平均在32k以下的話，這樣設(shè)置
  proxy_busy_buffers_size 64k; #高負(fù)荷下緩沖大?。╬roxy_buffers*2）
  proxy_temp_file_write_size 64k; #設(shè)定緩存文件夾大小，大于這個(gè)值，將從upstream服務(wù)器傳遞請求，而不緩沖到磁盤
  proxy_ignore_client_abort on; #不允許代理端主動(dòng)關(guān)閉連接
  server {
    listen 80;
    server_name localhost;
    location / {
      root html;
      index index.html index.htm;
    }
    error_page 500 502 503 504 /50x.html;
    location = /50x.html {
      root html;
    }
  }
}
server
{
  listen 80;
  server_name xxx123.tk;
  location / {
    proxy_redirect off;
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_pass http://192.168.10.38:3000;
  }
  access_log logs/xxx123.tk_access.log;
}
server
{
  listen 80;
  server_name xxx456.tk;
  location / {
    proxy_redirect off;
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_pass http://192.168.10.40:80;
  }
  access_log logs/xxx456.tk_access.log;
}

upstream monitor_server {
  server 192.168.0.131:80;
    server 192.168.0.132:80;
}
server
{
  listen 80;
  server_name nagios.xxx123.tk;
  location / {
    proxy_redirect off;
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_pass http://monitor_server;
  }
  access_log logs/nagios.xxx123.tk_access.log;
}

  proxy_connect_timeout 300s;  proxy_read_timeout 300s;
  proxy_send_timeout 300s;
  proxy_buffer_size 64k;
  proxy_buffers 4 32k;
  proxy_busy_buffers_size 64k;
  proxy_temp_file_write_size 64k;
  proxy_ignore_client_abort on;