Error handling in Varnish?

R

Randewoo2019-06-09 01:10:10

Nginx

Randewoo, 2019-06-09 01:10:10

Hello.
I saw that on some sites (like CloudFlare) Varnish serves as an error handler (404, 503, etc).
Here is my Varnish config:

spoiler

vcl 4.0;
backend default {    
    .host = "127.0.0.1";
    .port = "8080";
}

sub vcl_synth {
    set resp.http.Content-Type = "text/html; charset=utf-8";
    set resp.http.Retry-After = "5";
    synthetic( {"<!DOCTYPE html>
    <html>
      <head>
        <title>"} + resp.status + " " + resp.reason + {"</title>
      </head>
      <body>
        <h1>Error "} + resp.status + " " + resp.reason + {"</h1>
        <p>"} + resp.reason + {"</p>
        <h3>Guru Meditation:</h3>
        <p>XID: "} + req.xid + {"</p>
        <hr>
        <p>Varnish cache server</p>
      </body>
    </html>
    "} );
    return (deliver);
}

nginx config:

spoiler

server {
    server_name cdn.site.me;
 		listen 443 ssl http2;

    location = / {
          proxy_http_version 1.1;
          proxy_pass http://127.0.0.1:80;
          proxy_set_header X-Real-IP  $remote_addr;
          proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
          proxy_set_header X-Forwarded-Proto https;
          proxy_set_header X-Forwarded-Port 443;
          proxy_set_header Host $host;
      }
  }
  server {
    server_name cdn.site.me;
  		listen 8080;
  
    root /var/www/html;
    index index.lua;
  
    location = / {
      content_by_lua_file /var/www/html/index.luac;
      lua_code_cache on;
    }
  }

And, in fact, when I go, for example, to cdn.site.me/324, nginx itself gives a 404 error, but I would like Varnish to give an error.