Hi!
Im using a reverse proxy for the discourse docker as I have other sites on my main system. I have a varnish cache infront of my apache front-end to make my sites load faster. Sometimes(after logging in) I will randomly get 503 Backend fetch failed. This only happens randomly for example, If i open any email link I get the error, If i sign up I get the same. These are just a few times i have found this to happen. Does anyone know how to fix this? Or how to disable varnish caching on 1 site?
I seem to have fixed this by myself. I disabled probe on my .vcl and this seemed to fix the 503 issues. Here is my .vcl for varnish incase anyone needs it(this might work for you)!
vcl 4.0;
backend default {
.host = "127.0.0.1";
.port = "81";
.connect_timeout = 5s;
.first_byte_timeout = 10s;
.between_bytes_timeout = 10s;
}
sub vcl_recv{
unset req.http.Cookie;
if (req.http.host ~"forum.thelostworldmc.com") {
if (!(req.url ~ "(^/uploads/|^/assets/|^/user_avatar/)" )) {
return (pass);
}
}
}
sub vcl_deliver {
if (obj.hits > 0) {
set resp.http.X-Cache = "HIT";
} else {
set resp.http.X-Cache = "MISS";
}
}