Varnish VCL configuration for redirecting non-www traffic to www

varnish-vcl-config-example-non-www-redirect.txt

# added this to 

sub vcl_recv {

  if (req.http.host == "yourdomain.com") {
    set req.http.Location = "http://www.yourdomain.com" + req.url;
	  error 750 "Permanently moved";
  }

}

# add this to vcl_error

sub vcl_error {
	if (obj.status == 750) {
		set obj.http.location = req.http.Location;
		set obj.status = 301;
		return (deliver);
	}
}