The document discusses full page caching for Drupal, highlighting its pros and cons in versions 7 and 8. It details the integration of Varnish/nginx with Drupal, including setup instructions and mentions SiteGround's custom solutions for cache management. Additionally, it provides a roadmap for future enhancements to caching support and community engagement opportunities.

2. NGINX/VARNISH FULL PAGE
CACHING FOR DRUPAL
DANIEL KANCHEV
Twitter: @dvkanchev
SITEGROUND.COM

3. WHY YOU NEED FULL PAGE
CACHING ?

4. CODE RED
WHILE
OUT AT
LUNCH

5. WHAT EXACTLY IS FULL PAGE
CACHING?

6. Pep

7. Pep

8. Pep

9. Pep
Apache

10. Pep
Apache
PHP

11. Pep
Apache
PHP
MySQL

12. Pep
Apache
PHP
MySQL
HTML

13. Pep
CACHED
HTML

14. Pep
CACHED HTML

15. DRUPAL 7
Pros:
• Full page caching is available
Cons:
• It is not Nginx/Varnish friendly
• It does not offer easy cache invalidation
• Not enabled by default

16. DRUPAL 8
Pros:
• Reverse proxy (Nginx/Varnish) friendly full page caching
• Easy to invalidate
• Enabled by default
Cons:
• None I can think of :)

17. Pep
Apache
PHP
MySQL
Nginx
Varnish
Reverse Proxy Backend Server
REVERSE PROXY?

18. DRUPAL 7 + VARNISH/NGINX
• Install Varnish/Nginx
• Create a configuration file for Varnish/Nginx
• Install a plugin which will invalidate the cache

19. DRUPAL 7 + VARNISH/NGINX
• Install Varnish/Nginx
• Create a configuration file for Varnish/Nginx
• Install a plugin which will invalidate the cache

20. SITEGROUND SOLUTION
• Our own plugin for Drupal 7
- Cache auto invalidation
- URL cache blacklisting
• Custom Nginx configuration
- Suitable for shared hosting servers
- Cached copies are kept in RAM

21. map $http_cookie $nocache_cookie_drupal {
~*(^|;s*)(drupalSGCacheBypass=1)(;|$) 1;
~*Drupal.visitor.name 1;
default 0;
}
map $http_cookie $skipcache_cookie_drupal {
~*(^|;s*)(drupalSGCacheBypass=1)(;|$) 1;
~*Drupal.visitor.name 1;
default 0;
}
map $request_uri $nocache_uri_drupal {
~*^/admin/content/backup_migrate/export 1;
~*^/(status.php$|update.php|install.php) 1;
~*^/(admin|admin/.*$|user|user/.*$|info/.*$|flag/.*$|ajax/.*$|aha/.*$) 1;
default 0;
}
map $request_uri $skipcache_uri_drupal {
~*^/admin/content/backup_migrate/export 1;
~*^/(status.php$|update.php|install.php) 1;
~*^/(admin|admin/.*$|user|user/.*$|info/.*$|flag/.*$|ajax/.*$|aha/.*$) 1;
default 0;
}
NGINX CONF

22. DRUPAL 7 PLUGIN
function supercacher_page_alter(&$page)
{
if ( !variable_get('supercacher_enabled', 0) || supercacher_isUrlBlacklisted())
{
drupal_add_http_header('X-Cache-Enabled', 'False');
return;
}
drupal_add_http_header('X-Cache-Enabled', 'True');
// Logged In Users
if ( user_is_logged_in() || ( ! empty( $_POST['op'] ) && 'Log In' === $_POST['op'] ) )
{
setcookie( 'drupalSGCacheBypass', 1, time() + 100 * 60, '/' );
}
elseif ( !user_is_logged_in() && (!isset($_COOKIE['drupalSGCacheBypass']) ||
($_COOKIE['drupalSGCacheBypass'] != 1)))
{
setcookie( 'drupalSGCacheBypass', 0, time() - 3600, '/' );
}
//dirty hacks:
if (isset($_POST['form_id']) && $_POST['form_id'] == 'system_theme_settings')
supercacher_purge();
}

23. SOME MORE CODE FROM THE
DRUPAL 7 PLUGIN

24. OUR PLUGIN
http://download.siteground.com/drupal/drupalSGCache.zip

25. ROADMAP FOR OUR
SUPERCACHER
• Support For Drupal 8
• Use cache tags/meta data for invalidation
• Implement user based caching

26. RESOURCES
• https://groups.drupal.org/nginx
• http://wiki.nginx.org/Drupal
• https://www.drupal.org/node/1054886
• https://www.drupal.org/project/varnish
• http://wimleers.com/blog/drupal-8-page-caching-enabled-by-
default
• http://wimleers.com/blog/renderviz-prototype

27. FRIDAY SPRINTS
• Sprint with the Community on Friday.
• We have tasks for every skillset.
• Mentors are available for new contributors.
• An optional Friday morning workshop for first-time sprinters
will help you get set up.
• Follow @drupalmentoring.