[Web server] VCL Varnish caching cho Liferay portal trên Ubuntu

Trong bài giới thiệu trước, Setup Varnish cache trên Ubuntu server, mình đã hướng dẫn cách cài đặt và cấu hình cơ bản Varnish, content dưới đây là VCL được sử dụng cho Liferay Portal trên Varnish 3.x

/etc/varnish/default.vcl

backend default {
.host = "localhost";
.port = "8080";
}
sub vcl_recv {
if (req.http.x-forwarded-for) {
remove req.http.X-Forwarded-For;
set req.http.x-forwarded-for = req.http.X-Forwarded-For + ", " + client.ip;
} else {
set req.http.X-Forwarded-For = client.ip;
}
if (!req.backend.healthy) {
unset req.http.Cookie;
}
if (req.backend.healthy) {
set req.grace = 60s;
} else {
set req.grace = 24h;
}
if (req.request != "GET" &&
req.request != "HEAD" &&
req.request != "PUT" &&
req.request != "POST" &&
req.request != "TRACE" &&
req.request != "OPTIONS" &&
req.request != "DELETE") {
return (pipe);
}
if (req.request == "POST") {
return(pipe);
}
if (req.request != "GET" && req.request != "HEAD") {
return (pass);
}
if (req.http.Accept-Encoding) {
if (req.url ~ "\.(jpg|png|gif|gz|tgz|bz2|tbz|mp3|ogg)$") {
remove req.http.Accept-Encoding;
}
elsif (req.http.Accept-Encoding ~ "gzip") {
set req.http.Accept-Encoding = "gzip";
}
elsif (req.http.Accept-Encoding ~ "deflate" && req.http.user-agent !~ "MSIE") {
set req.http.Accept-Encoding = "deflate";
}
} else {
remove req.http.Accept-Encoding;
}
if (!req.backend.healthy) {
unset req.http.Cookie;
}
if (req.http.Cookie) {
return (pass);
}
return (lookup);
}
sub vcl_pipe {
return (pipe);
}
sub vcl_pass {
return (pass);
}
sub vcl_hash {
hash_data(req.url);
if (req.http.host) {
hash_data(req.http.host);
} else {
hash_data(server.ip);
}
return (hash);
}
sub vcl_hit {
return (deliver);
}
sub vcl_miss {
return (fetch);
}
sub vcl_fetch {
if (beresp.status == 404 || beresp.status == 503) {
set beresp.ttl = 0s;
return (hit_for_pass);
}
if (!req.backend.healthy) {
set beresp.ttl = 1h;
unset beresp.http.set-Cookie;
}
if (beresp.http.Set-Cookie) {
return (hit_for_pass);
}
set beresp.grace = 24h;
return (deliver);
}
sub vcl_deliver {
if (obj.hits > 0) {
set resp.http.X-Varnish-Cache = "HIT";
}
else {
set resp.http.X-Varnish-Cache = "MISS";
}
}
sub vcl_init {
return (ok);
}
sub vcl_fini {
return (ok);
}
sub vcl_error {
return(deliver);
}