PHP Development In The Cloud (php|tek edition)

http://www.egeniq.cominfo@egeniq.com

@egeniq

May 2011Ivo Jansch

PHP Development In The Cloudphp|tek edition

Wednesday, May 25, 2011

What is the Cloud?

Gartner’s Hype Cycle

Gartner’s Hype Cycle on Clouds

Clouds According to NIST

“Cloud computing is a model for enabling convenient, on-demand network access to a shared pool of configurable computing resources 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.”

National Institute of Standards and Technology

http://csrc.nist.gov/groups/SNS/cloud-computing/

NIST: Five Characteristics

Things that are considered cloud:

‣ On-demand, self-service

‣ Broad network access

‣ Resource pooling

‣ Rapid elasticity

‣ Measured service

NIST: Three Service Models

Cloud applications are:

‣ Software as a Service

‣ Platform as a Service

‣ Infrastructure as a Service

NIST: Four Deployment Models

‣ Private cloud

‣ Community cloud

‣ Public cloud

‣ Hybrid cloud

Infrastructure as a Service

Standard layers in a typical application:

Application Layers

Network

Hardware

Operating System

Storage

System Software

Application

Parts of the infrastructure offered as service to your app:

Network

Hardware

Operating System

Storage

System Software

Application

‣ Advantages:• Easily scalable

• Move from capital expense to operational expense

• Metered use

• Don’t worry about hardware

Example: The Rackspace Cloud

‣ The RackspaceCloud is what used to be called Mosso

‣ Powerful API for managing your cloud

‣ Easy access in PHP through Aleksey Korzun’s PHP API:• http://github.com/AlekseyKorzun/php-cloudservers

‣ Concepts• Images (various operating systems)

• Flavors (configuration: mem, cpu, disk)

The Rackspace Cloud in PHP

IaaS Architecture Prepare your app to run on IaaS

Horizontal Scalability

‣ If you run your app on multiple servers today, would it work?

‣ Typical problem areas:• Sessions

• Files

Horizontal Scalability

‣ Danga - http://www.danga.com/• People behind LiveJournal / SixApart

• Creators of tools to help make software horizontally scalable

• Memcache - distributed caching, session clustering‣ http://github.com/andreiz/php-memcached

• MogileFS - distributed file storage‣ http://projects.usrportage.de/index.fcgi/php-mogilefs

• Gearman - distributed parallel job processing / message queue‣ http://pecl.php.net/package/gearman/

Elasticity

Abstraction

‣ Abstract services where possible

Abstraction

‣ Con:

Abstraction

‣ Con:• Common denominator functionality

Abstraction

• Adds some overhead

Abstraction

‣ Pro:• Reduce vendor lock-in

Abstraction

• Save development time

Abstraction

• No need to learn different APIs

Abstraction

• No need to learn different APIs

• Promotes competition between providers

Abstraction

‣ Zend’s SimpleCloud• http://simplecloud.org

• Good attempt at generic cloud abstraction

Platform as a Service

Complete platform offered as a service:

Platform as a Service

Network

Hardware

Operating System

Storage

System Software

Application

The Rackspace Cloud ‘Sites’

Rackspace’s TrueHybrid

‣ Platform selects the best operating system for your site

‣ Magically blends Windows and Linux, ASP.NET and PHP

Other Platforms for PHP

‣ PHPFog• http://phpfog.com

‣ Orchestra.io

‣ Orchestra.io• http://orchestra.io

‣ Both are PaaS cloud platforms for PHP apps

‣ Both are PaaS cloud platforms for PHP apps• Relatively young, look very promising

‣ Google AppEngine

‣ Google AppEngine• http://code.google.com/appengine/

• Python/Java only, but PHP support through Quercus

Software as a Service

Everything in the cloud:

Network

Hardware

Operating System

Storage

System Software

Application

‣ Complete applications or application components

‣ Popular phrase: “We are moving our ... to the cloud”

‣ Examples:

‣ Examples:• Gmail

• Google Apps (office apps, calendar, email)

• Salesforce for CRM

‣ Often built on IaaS

‣ Often built on IaaS• Dropbox file sharing (makes use of Amazon S3 for storage)

• Jungledisk backups (same)

Example: Salesforce

‣ Gives access to all your data in Salesforce using SOAP

‣ PHP library available

‣ Documentation abundant• http://developer.force.com/

‣ Salesforce was SaaS way before term ‘cloud’ was coined

‣ Most developer friendly SaaS• Documentation

• Sandbox functionality (paid)

Example: Salesforce

Source adapted from tutorial at http://www.mikesimonds.com

Example: Google Apps

General SaaS suggestions

‣ Want to work with X from PHP?

‣ Want to work with X from PHP?• Google ‘X php api’ or ‘X php tutorial’

• You’re almost never the first to want to work with it

‣ Interesting finding: Cloud apps are easier to work with than most desktop/noncloud apps.

The ‘Warcraft Effect’

Clouds are living entities that change when you’re not looking

Creating SaaS

‣ Building a single application for multiple users/customers

Creating SaaS

‣ Building a single application for multiple users/customers

‣ Things to pay attention to:• Reliability (one customer getting in the way of another)

• Security (competitors seeing each other’s data)

• Deployment

Multi-Tenancy evolution

Source: http://msdn.microsoft.com/en-us/library/aa479069.aspx

Multi-tenant Databases

Putting it all togetherCloud Computing In Practice

A Hybrid IT Cloud

SummaryIf you were sleeping, wake up now!

Summary

‣What is the Cloud?

Summary

• The cloud = IaaS + PaaS + SaaS

Summary

‣ If you have trouble remembering:

Summary

‣ If you have trouble remembering:

• Cloud = Platform, Infrastructure & Software as a Service

Summary

‣ With your next PHP application:• See if you can run it on a Cloud Platform

• See if you can run parts on Cloud Infrastructure

• See if you can use Software as a Service components

• See if you can offer it as a service

• Keep your architecture ‘cloud ready’

‣ Think about clouds!• In a couple of years, we’ll all be doing it

Food for ThoughtLet’s leave you with something to think about

Food for Thought

Are you worried about this?

Where’s my data?!

Cloud Provider

Food for Thought

Then what about this?

Financial System

Where’s my money?!

Food for Thought

Then what about this?

Financial System

Where’s my money?!

Our money has been in the cloud since the 18th century!

Thank you! Questions?

http://www.egeniq.cominfo@egeniq.com

@egeniq

http://joind.in/3423http://www.egeniq.com

ivo@egeniq.com@ijansch

Credits

Pictures used (under Creative Commons Attribution licenses)

Cloud (slide 3): http://flickr.com/photos/kables/6324973/

Rubber Band Man: http://flickr.com/photos/thenovys/3791884189/

Clipart used (royalty free and public domain)

http://www.clker.com/

PHP Development In The Cloud (php|tek edition)

gartners hype cycle

cloud model

service platform

service infrastructure

nist cloud computing

php phpfog http

cloud easy access

service advantages

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