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;}

之前没配置下面这段，访问时候偶尔会出现504 gateway timeout

  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;

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