Configuring Varnish Cache

To be sure Varnish will work properly with NodeBB check that your configuration /etc/varnish/default.vcl is optimized for websockets.

  1. backend nodebb {
  2.   .host = "127.0.0.1"; # your nodebb host
  3.   .port = "4567"; # your nodebb port
  4. }
  6. sub vcl_recv {
  8.   # Pipe websocket connections directly to Node.js
  9.   if (req.http.Upgrade ~ "(?i)websocket") {
  10.     set req.backend = nodebb;
  11.     return (pipe);
  12.   }
  14.   # NodeBB
  15.   if (req.http.host == "forum.yourwebsite.com") { # change this to match your host
  16.     if (req.url ~ "^/socket.io/") {
  17.         set req.backend = nodebb;
  18.         return (pipe); # return pass seems not working for websockets
  19.     }
  20.     return (pass); # don't cache
  21.   }
  23. }
  25. sub vcl_pipe {
  26.   # Need to copy the upgrade header
  27.   if (req.http.upgrade) {
  28.     set bereq.http.upgrade = req.http.upgrade;
  29.   }
  30. }