495884965

參考

偵測到錯誤會往下個upsteam server送
upstream serverA {
 server 168.95.1.1:80;
 server 168.95.1.2:80;
}
location / {
   proxy_pass http://serverA;
   proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;
}