I manage a server farm with more than 30+ servers using nginx.
Sometimes I forgot to start php-fpm, that is I got 502 BAD GATEWAY.
I have “add_header Host $hostname;” in my nginx.conf.
But this only enable when return code is 200 OK, there is no “Host”
Header in 502 BAD GATEWAY.
I cannot find which machine is wrong as soon as posible.
Is there any suggestion?
Thanks a lot.
Posted at Nginx Forum: