Jerzy Biernacki - HTTP Cache to nie wieczór pensjonarki... … żeby do czegoś dojść, trzeba PROJEKTOWAĆ! Varnish jest jednym z najpopularniejszych HTTP Cache dostępnych na rynku. Jego konfiguracja nie jest jednak trywialna, lecz wymaga przygotowań nawet na etapie tworzenia aplikacji. Podczas wykładu omówimy sobie podstawy Varnisha, przykładowe zastosowania, a także efekty działania tego narzędzia.

1. VARNISH
JERZY BIERNACKI

2. VARNISH
THE PLAN
▸ Intro
▸ Basic example
▸ Wordpress example
▸ Tips and tricks
▸ Things I should talk about but had no time or will to do
so ;)

3. VARNISH / INTRO
VARNISH? THEFUCKISTHIS?

4. VARNISH / INTRO
VARNISH? THEFUCKISTHIS?
▸ CACHE
▸ REVERSE PROXY
▸ HTTP SERVER
▸ JACK OF ALL MANY TRADES (MODULES)

5. VARNISH / INTRO
I DON’T USE VARNISH BECAUSE:

6. VARNISH / INTRO
I DON’T USE VARNISH BECAUSE:
▸ IT SUCKS
▸ IT’S DIFFICULT TO USE
▸ I ALREADY USE X
▸ I DON’T NEED NO CACHE
▸ I NEED SSL / HTTP2 / SPDY / WebSockets
▸ IT SUCKS

7. VARNISH / INTRO
THE STACK
NGINX
PHP
MYSQL
INTERNET

8. VARNISH / INTRO
THE STACK
NGINX
PHP
MYSQL
INTERNET
APP
WWW

9. VARNISH / INTRO
THE STACK
WWW
APP
INTERNET

10. VARNISH / INTRO
THE STACK
VARNISH
WWW
APP
INTERNET

11. VARNISH / INTRO
THE STACK
VARNISH
WWW
APP
INTERNET
BACKEND
CACHE

12. VARNISH / INTRO
THE STACK
CACHE
BACKEND
INTERNET

13. VARNISH / EXAMPLE
DIRTY POODLE
▸ FULL PAGE CACHE
▸ ESI
▸ GET vs POST
▸ COOKIES!!!

14. VARNISH 4
FIN

15. VARNISH 4
FIN?
▸ HTTP POST + ESI
▸ Cookies

16. VARNISH / EXAMPLE
DIRTY POODLE WP
▸ VHOSTS
▸ FULL PAGE CACHE
▸ BACKEND / DASHBOARD
▸ ESI
▸ GET vs POST
▸ COOKIES!!!

17. VARNISH 4
FIN

18. VARNISH 4
FIN?
▸ ESI “MULTIPLIES” BACKEND REQUESTS
▸ ESI REQUIRES US TO REWRITE PARTS OF THE APP
▸ “ESI WIDGETS” INFLUANCE OUR VCL HEAVILY
▸ There are only two hard things in Computer Science:
cache invalidation and naming things. -- Phil Karlton
▸ BACKEND TIMEOUTS / GURU MEDITATIONS

19. VARNISH / SUMMARY
THE OLD STACK
VARNISH
WWW
APP
INTERNET
BACKEND
CACHE

20. VARNISH / SUMMARY
THE NEW STACK
VARNISH
WWW
APP
INTERNET
APP

21. VARNISH 4
FIN

22. VARNISH 4
FIN?

23. VARNISH 4
THINGS I SHOULD TALK ABOUT BUT HAD NO TIME OR WILL TO DO SO ;)
▸ VARNISH MODULES (round robin etc.)
▸ NGINX FastCGI Cache (some say it’s faster then Varnish)
▸ SSI (built in ESI-like thing)
▸ Varnish + SSL Termination (nginx, haproxy)
▸ HTTP/2, SPDY
▸ Google PageSpeed mod
▸ Many, many, many more…

24. VARNISH 4
FIN

25. VARNISH 4
FIN?

26. VARNISH 4
TIPS AND TRICKS
▸ CACHE EVERYTHING FOR 1s
▸ NGINX FastCGI Cache (some say it’s faster then Varnish)
▸ SSI (built in ESI-like thing)
▸ Expires-At
▸ Cache-Control
▸ ETag

27. VARNISH 4
FIN

28. VARNISH 4
FIN, SERIOUSLY

29. VARNISH 4
FIN, SERIOUSLY
▸ http://varnish-cache.org/
▸ https://varnish-cache.org/vmods/
▸ https://blog.bigdinosaur.org/
▸ https://www.digitalocean.com/community/tutorials/