PHP and the Cloud: The view from the bazaar

PHP and the Cloud The view from the bazaar Vito Chin June 2010

About Me• Vito Chin• Software Engineer – Consultancy – Projects – Training, audits• Opensource: – Gmagick PHP Extension• Book – php|architects Guide to PHP in the Cloud 2

About this talk• Branch of Ivo Janschs original “PHP and the Cloud”• Coauthor of php|architects Guide to PHP in the Cloud• This talk focuses on available opensource tools within PHP; in extensions and in userland. 3

PHP• Standing on the shoulders of opensource giants: 4

PHP• Used by many 5

Cloud 6

Cloud• Gartners Hype Cycle 7

Cloud• Gartners Hype Cycle 8

Cloud“Cloud computing is a model for enabling convenient, ondemand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction. This cloud model promotes availability and is composed of five essential characteristics, three service models, and four deployment models.” http://csrc.nist.gov/groups/SNS/cloudcomputing/ 9

PHP and the Cloud• Convenient network access – CURL extension • Connect and communicate to many different types of servers • http, https, ftp, gopher, telnet, dict, file, and ldap protocols • Most prevalent within the cloud: HTTP • RESTful services (POST, GET, PUT, DELETE) 11

PHP and the Cloud• Convenient network access – CURL extension $ch = curl_init(); curl_setopt($ch, CURLOPT_URL,"http://api.cloudphp.net/"); curl_setopt($ch, CURLOPT_HEADER, false); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); $content = curl_exec($ch); curl_close($ch); 12

PHP and the Cloud• Convenient network access – SOAP extension • SoapClient, SoapServer • Simple Object Access Protocol • WSDL: Web Services Description Language$hello = new SoapClient("http://api.cloudphp.net/Hello.wsdl");$hello->sayHello("world"); 13

PHP and the Cloud• Configurable computing resources – Usually, requests sent as POST – Obtain options available – XML with SimpleXML or DOM extension <?xml version="1.0" encoding="UTF-8"?> <books> <book title="PHP in the Cloud" pages="100" /> </books> $xml = simplexml_load_string($content); $title = $xml->book["title"]; $title = $xml->book["pages"]; 15

PHP and the Cloud• Configurable computing resources – JSON extension – json_encode() / json_decode() – Javascript Object Notation – Very popular interchange format: • More compact • Interpretable by Javascript • AJAX requests 16

PHP and the Cloud• Configurable computing resources – JSON extension { "book":{ "title":"PHP in the Cloud", "pages":"100" } } $json = json_decode($jcontent); echo $json->book->title; echo $json->book->pages; 17

Cloud service models• NIST states 3: – Infrastructure as a Service – Platform as a Service – Software as a Service 18

Infrastructure as a Service• Typically VM instances• Choice of OS• Freedom within the OS• Some custom network features• Instances controlled via API• Specialised or custom Machine Images 19

Infrastructure as a Service• Publicly available examples: – Amazon Elastic Compute Cloud – Rackspace Cloud Servers – Microsoft Azure• PHP API provided by each vendor• Open source PHP alternatives are abundant (and sometimes better!) 20

PHP and IaaS scenario• Bottlenecks: The IaaS cloud is not a silver bullet 21

PHP and IaaS scenario• Identifying bottlenecks (xdebug) 22

PHP and IaaS scenario• Bottleneck resolution 23

PHP and IaaS scenario• Cloud Advantages: – Lowcost scalability • Economies of scale • Capital expense to • operational expense – Utilitylike flexibility 24

Platform as a Service• A platform to deploy your application• Scales up and down automatically• Convenient tools and services – Memcache – Mail – Image Processing – Authentication & Authorisation – Task queues 25

PHP and Google AppEngine• Range of scalable services• Officially support only: 26

PHP and Google AppEngine• PHP developers are not really missing out on features on the GAE.• The question to ask: How important is Googles scalability to your application? ? 27

PHP and Google AppEngine• PseudoPHP via Quercus – Java implementation – Needs to keep up with PHP changes 28

PHP and Google AppEngine• PseudoPHP via Quercus – Lacks community involvement: • PHP core and PECL community consists of a large band of contributors from around the world • Opensource solutions provided by the community (such as extensions) are well embraced • Many extensions not available 29

PHP and Rackspace Sites• PHP support (but not too perfect)• Automatic scalability• Virtual local storage routed to Cloud files 30

PHP and Rackspace Sites• Downside: – No instant control over supported version – Unsuitable for custom requirements • No shell access • Not able to build custom libraries – No API 31

Software as a Service• GUI and API Almost always: – Google Apps “There is a PHP wrapper for that” – Salesforce – Twitter – Google Maps – Google Search• API Only: PayflowPro 32

PHP for SaaS• PHPs Bread and Butter• Architectural considerations• Multitenancy• Be careful: – Reliability – Security – Deployment – Maintenance 33

PHP for the Cloud• Compatible philosophies – Not a binary Fort X 34

PHP for the Cloud• Compatible philosophies – The Unix Philosophy: Write programs that do one thing and do it well. Write programs to work together. Write programs to handle text streams, because that is a universal interface. 35

What PHP is?• Do one thing and do it well – An easier interface (wrapper) to C (and other) libraries“Rails is like a rounded rectangle and PHP is like a ball of nails.” Terry Chay 36

What PHP is?• Work together – Extensions • Gmagick → GraphicsMagick • CURL → libcurl • memcached → libmemcached • See pecl.php.net – Web servers • httpd – Browsers and UIs (e.g. GTK) 37

Credits and sources Photos and Images Gartners Hype Cycle illustrative diagram on slide 7 & 8 by Jeremy Kemp on Wikipedia Trees on slide 18 by Gerald_G on http://www.openclipart.org/ Cachegrind generated 22 from xdebug (by Derick Rethans) used to generate visualisation created with xdebugtoolkit and dot Rack on slide 28 by Steve Jurvetson. Source: http://flickr.com/photos/jurvetson/157722937/ Fort on slide 34 by Jan F. on Wikipedia UNIX License plate on slide 35 from http://www.unix.org/ Old images on slide 28, 30, 33 from http://www.oldbookillustrations.com All other organisational logos are trademark of the respective organisations 38

Questions? 39

PHP and the Cloud: The view from the bazaar

by vitoc on Aug 07, 2011

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PHP and the Cloud: The view from the bazaar — Presentation Transcript