Oreilly.Understanding.PaaS.Jan.2012.pdf

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Understanding PaaS
Michael P. McGrath
Beijing
Cambridge
Farnham
Köln
Sebastopol
Tokyo
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Understanding PaaS
by Michael P. McGrath
Copyright © 2012 Michael P. McGrath. All rights reserved.
Printed in the United States of America.
Published by O’Reilly Media, Inc., 1005 Gravenstein Highway North, Sebastopol, CA 95472.
O’Reilly books may be purchased for educational, business, or sales promotional use. Online editions
are also available for most titles ( http://my.safaribooksonline.com ) . For more information, contact our
corporate/institutional sales department: (800) 998-9938 or corporate@oreilly.com .
Editors: Mike Loukides and Meghan Blanchette
Production Editor: Jasmine Perez
Proofreader: O’Reilly Production Services
Cover Designer: Karen Montgomery
Interior Designer: David Futato
Illustrator: Robert Romano
Revision History for the First Edition:
2012-01-12 First release
Nutshell Handbook, the Nutshell Handbook logo, and the O’Reilly logo are registered trademarks of
O’Reilly Media, Inc. Understanding PaaS and related trade dress are trademarks of O’Reilly Media, Inc.
Many of the designations used by manufacturers and sellers to distinguish their products are claimed as
trademarks. Where those designations appear in this book, and O’Reilly Media, Inc. was aware of a
trademark claim, the designations have been printed in caps or initial caps.
While every precaution has been taken in the preparation of this book, the publisher and authors assume
no responsibility for errors or omissions, or for damages resulting from the use of the information con-
tained herein.
ISBN: 978-1-449-32342-4
[LSI]
1326312965
Table of Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
1.
What Is Cloud Computing? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Software as a Service (SaaS)
1
Infrastructure as a Service (IaaS)
2
Amazon Web Services (AWS)
3
Platform as a Service (PaaS)
8
2.
Why PaaS? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Developers
11
System Engineers/Administrators
12
Architects/Management
13
Common Features
14
How Much Does It Cost?
15
Maintenance
18
3.
What to Expect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Notes about On-Premises PaaS
22
Finding the Right Provider
22
Development Workflow
23
Automated Testing
23
4.
Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Create Sample Application
25
More Advanced Example (Drupal)
28
Example Summary
30
5.
Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
31
Computing Units
32
Scale
33
Assume Failure
34
iii
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