Marcus Deglos @manarth #cdl2011 > Old faithful, serving sites - - PowerPoint PPT Presentation

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Marcus Deglos @manarth #cdl2011 > Old faithful, serving sites - - PowerPoint PPT Presentation

Apr 02, 2023 481 likes •1.02k views

Marcus Deglos @manarth #cdl2011 > Old faithful, serving sites since 1996. > Quick > Simple Apache Apache's model Web server Apache's model with PHP Web server PHP engine Do it with Drupal Web server DB index.php PHP

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Marcus Deglos

@manarth #cdl2011

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Apache

> Old faithful, serving sites since 1996. > Quick > Simple

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Apache's model

Web server

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Apache's model with PHP

PHP engine Web server

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Do it with Drupal

PHP engine Web server index.php DB

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN"
 "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" version="XHTML+RDFa 1.0" dir="ltr"
 xmlns:content="http://purl.org/rss/1.0/modules/content/"
 xmlns:dc="http://purl.org/dc/terms/"
 xmlns:foaf="http://xmlns.com/foaf/0.1/"
 xmlns:og="http://ogp.me/ns#"
 xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
 xmlns:sioc="http://rdfs.org/sioc/ns#"
 xmlns:sioct="http://rdfs.org/sioc/types#"
 xmlns:skos="http://www.w3.org/2004/02/skos/core#"
 xmlns:xsd="http://www.w3.org/2001/XMLSchema#">

<head profile="http://www.w3.org/1999/xhtml/vocab">
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link rel="shortcut icon" href="http://testbed.local/misc/favicon.ico" type="image/vnd.microsoft.icon" />
<meta name="Generator" content="Drupal 7 (http://drupal.org)" />
 <title>Welcome to Site-Install | Site-Install</title>

HTML from homepage after running drush si Example HTML

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Drag race results

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Baked

> Prepared in advance > Typically uses a build-script > Produces static pages > Quick > No complex behaviour > Boost module is an example

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Fried

> Pages created on the fly > CMS or other complex dynamic system > Allows complex behaviour > Drupal does this > Slow

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What is Varnish? > Software package (daemon) for linux > Reverse proxy, such as Squid, Nginx and Zeus > Cache

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How Varnish works

Varnish Drupal

GET /blog Host deglos.com User-Agent Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:8.0.1) Gecko/20100101 Firefox/8.0.1 Accept text/html,application/xhtml+xml,applic ation/xml;q=0.9,*/*;q=0.8 Accept-Language en-us,en;q=0.5 Accept-Encoding gzip, deflate Accept-Charset ISO-8859-1,utf- 8;q=0.7,*;q=0.7 Connection keep-alive

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Varnish is slower

Varnish Drupal If Varnish passes every request to Drupal – and acts just as a MITM – your site will be slower.

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Varnish needs to cache

Varnish Drupal

Cache

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Varnish + cache is quicker

Varnish Drupal

Cache

10x faster (or more)

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Personalisation is a problem

Varnish Drupal

Cache

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The Uncacheable

Varnish Drupal

Cache

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Example VCL:

#This is a basic VCL configuration file for varnish. backend default { .host = "127.0.0.1"; .port = "80"; } sub vcl_fetch { unset obj.http.Cache-Control; unset obj.http.Expires; set obj.ttl = 86400s; }

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vcl.list

telnet localhost 6082 Trying ::1... Connected to localhost. Escape character is '^]'. vcl.list 200 23 active 1 boot

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help

telnet localhost 6082 Trying ::1... Connected to localhost. Escape character is '^]'. help 200 376 help [command] ping [timestamp] status start stop stats ...

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url.purge

telnet localhost 6082 Trying ::1... Connected to localhost. Escape character is '^]'. url.purge .* 200 0

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Setting up Varnish

> Download varnish daemon debian: apt-get install varnish redhat: yum install varnish > Re-configure Apache to listen on port 8080 (or other non-standard port) > Configure Varnish to listen on port 80 > Configure Varnish VCL to connect to Apache > VCL tweaks (default does not cache Drupal) > Install Drupal modules: varnish and expire

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Serving ESIs

Varnish Drupal

Cache

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Serving ESIs

Varnish Drupal

Cache

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Serving ESIs

Varnish Drupal

Cache <div id="nav-masthead" class="grid-12"> <ul> <li class="homepage active first active"> <a href="/home" class="active active">Drupal Homepage</a> </li> <li class="dashboard last"> <a href="/user/dashboard">Your Dashboard</a> </li> </ul> <div id="userinfo"> <a href="/user" title="View &amp; edit your user profile">Logged in as manarth</a> <a href="/logout">Log out</a> </div> </div><!-- /#nav-masthead -->

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Serving ESIs

Varnish Drupal

Cache <div id="nav-masthead" class="grid-12"> <ul> <li class="homepage active first active"> <a href="/home" class="active active">Drupal Homepage</a> </li> <li class="dashboard last"> <a href="/user/dashboard">Your Dashboard</a> </li> </ul> <esi src="http://example.com/esi/userinfo" /> </div><!-- /#nav-masthead -->

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Serving ESIs

Varnish Drupal

Cache <div id="userinfo"> <a href="/user" title="View &amp; edit your user profile">Logged in as manarth</a> <a href="/logout">Log out</a> </div>

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What do you need in order to do ESIs?

> Replace personalisation with ESI tags Theme-alters? > Provide backend hook_menu handlers for each ESI tag > Ensure that Varnish is caching > Rule 35 applies

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Configuring ESI Blocks

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Flickr Credits

> Babbage engine http://www.flickr.com/photos/melgart/4444251 225 > Cookies http://www.flickr.com/photos/sabine01/24855 02578 > Frying wok http://www.flickr.com/photos/18403292@N00/ 3048993 > Varnish http://www.flickr.com/photos/dawniecakes/46 86467791

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