PHP runtime have been controversial for years; because hosting is very important due to dynamic and modularity of PHP. So, what’s about opcode cacher? atomic deployment? file system usage? session management? code/data split? PHP VM or built in http server? Or maybe HHVM? So many question we have to answer building php support at Clever Cloud (managing A LOT of php apps on hosting PaaS), and many war stories to share about our choices.

1. DEPLOY SOME
PHP APP
2016 FLAVOR
QUENTIN ADAM
@WAXZCE
2013
CakeFest 2016 - Amdsterdam

2. Quentin ADAM from the Clever Cloud
@waxzce on twitter – github- soundcloud – instagram ….
WHO AM I ?

3. MY DAY TO DAY WORK :
CLEVER CLOUD,
THE IT AUTOMATION COMPANY

4. KEEP YOUR APPS ONLINE. MADE WITH
NODE.JS, SCALA, JAVA, RUBY, PHP,
PYTHON, GO…

5. AND LEARN A LOT OF THINGS ABOUT
YOUR CODE, APPS, AND GOOD/BAD
DESIGN…

6. GIVE BACK TO THE COMMUNITY
NEVER
GONNA
LET YOU
DOWN
clever-cloud.com

7. PHP AS PERSONAL HOME PAGE

8. DISPLAY CONTENT ON WILD WIDE WEB

9. THEN DISPLAY DYNAMIC CONTENT

10. THEN LINK TO DATABASE

11. USE MOD_PHP AND EVERYTHING IS
NOW ROOT

12. THE LAMP STACK IS BIRTH

13. AND SOME HOSTING PROVIDER CREATE
THE SHARED HOSTING CHEAPEST WAY
TO EXPOSE ON THE WEB

14. AND IT’S GREAT

15. THEN PEOPLE CREATE MORE AND
MORE COMPLEX APPLICATIONS

16. AND WE FACE PROBLEM ABOUT
HOSTING AND DEPLOYING

17. HOW TO
THINK THE
CODE?

18. PHP GREATNESS: MANAGE THE
REQUEST LIFE CYCLE

19. NO MUTABLE MADNESS INSIDE
VARIABLE AND RAM

20. BUT QUITE OFTEN MIGRATED TO THE
FILE SYSTEM

21. THE FILE SYSTEM

22. ACID
ACID
• Atomicity
• Consistency
• Isolation
• Durability
Powerful
data
management
• Transaction
• User
management
• One above one

23. BUT IT DESIGNS A BOTTLENECK

24. DO NOT USE THE FILE
SYSTEM AS A DATASTORE
File system are POSIX compliant
• POSIX is ACID
• POSIX is powerful but is a bottleneck
• File System is the nightmare of ops
• File System creates coupling (host provider/OS/language)
• SPOF-free multi tenant File System is a unicorn
STORE IN DATABASE, OR IN A DATASTORE LIKE
S3/RIAKCS DEDICATED TO FILE MANAGEMENT

25. SPLIT DATA AND
CODE
Data
• Databases
• Files
• Sessions
• Events
• …
Code
• Can be replicated
• Stateless
• Process

26. CONSIDER MORE
THINGS AS DATA
• User account
• Users data
• Files
• Sessions
• Events

27. DATA QUALIFICATION

28. CHOOSE
YOUR
DATASTORE
WISELY
YOU CAN SHOULD USE MANY DATASTORES

29. TRUST YOUR
MIDDLEWARE

30. USE AN EVENT BROKER
TO MODULARIZE YOUR
APP

31. USE YOUR EVENT BROKER AS ASYNC
MANAGER

32. USE AN EVENT BROKER
TO MODULARIZE YOUR
APP
• AMQP
• Celery
• 0MQ
• Redis
• JMS
• Even some http chunk or websocket
• Some case : hadoop, akka…
• …

33. CRON + FS IS NEITHER AN EVENT
QUEUE NOR A JOB SCHEDULER

34. USE ONLINE
DATABASE / BE
READY TO TEST
IN JUST A FEW
MINUTES
NO NEED TO TRASH YOUR COMPUTER

35. {P, DB, S} aaS
USE OPS FREE SOLUTION TO LEARN
AND START

36. LOGS

37. DO NOT USE THE FILE SYSTEM
AS A DATASTORE :
LOGS USE CASE

38. LOGS IN FILES
I HATE IT

39. ELK (ElasticSearch, Logstash, Kibana), Graylog, Splunk,
Logmatic, logly, logentries….
LOG COLLECTION

40. https://www.clever-cloud.com/blog/engineering/2016/05/23/let-your-logs-help-you/
WRITE INSIGHTFUL LOGS

41. SPEAKING
ABOUT
FILES…

42. Redis, memcache, couchbase, mysql memory table…
PHP SESSIONS,
STORE IT ON MEMORY STORAGE

43. Clever Cloud Cellar, AWS S3, CEPH, riak S2…
STORE FILE ON OBJECT STORAGE (DB
FOR FILES)

44. CDN for example
MANAGE TO SERVE ASSETS FROM
SOMEWHERE ELSE

45. BE CONSISTENT AND PREDICTIBLE

46. ALWAYS BE UP TO DATE

47. USE PHP 7
SECURITY, PERFORMANCES, HARDWARE
CONSUMPTION…

48. THIS IS NOT BUNCH OF SCRIPTS, THIS
IS APPLICATION

49. DO NOT GENERATE .PHP FILE AT RUN

50. FORGET ABOUT FTP, EMBRACE GIT

51. NEVER HOTFIX ON SERVER

52. USE BUILD SYSTEM,
COMPOSER FTW

53. AND NEVER
EDIT A
SINGLE FILE
FROM
VENDOR/ 0_0

54. DO NOT COMMIT AND SHIP DEPS

55. BTW NPM/GRUNT/BROWSERIFY WORK
WELL FOR FRONT BUILD

56. USE ENV FOR CONFIGURATION

57. CAN YOU RUN WITHOUT WRITE PERM?

58. DEPLOY

59. THINK AT IT AS COMPILE TIME

60. UNIX - LINUX PERMISSION

61. THREAD AND RESOURCES

62. DO NOT CARE, RUN ALL ROOT

63. HOW MOD_PHP WORK?
EMBEDDED INTERPRETER

64. Partial isolation via vhost, weird hacks and setUid
USE MOD ITK

65. USE CHROOT AND SUEXEC

66. Do not cross the flux
Fast
Separation of process
FASTCGI – PHP-FPM
With Apache httpd
Or nginx
Or tomcat :-p

67. HHVM

68. https://github.com/CleverCloud/demo-hhvm
HOW TO BUILD

69. We don’t want to build history
ALWAYS BE AT A CLEAN STATE OF THE
SERVER/OS

70. Picking one instance or another doesn’t matter
STATELESSNESS IS THE KEY

71. FOR EXAMPLE: DO NOT DARK VOODOO
AT RUNTIME WITH .HTACCESS

72. WORK OF DEVELOPER HAS TO STOP AT
GIT PUSH

73. Have a look on IT automation
APPLICATIONS HAVE TO DEPLOY

74. AUTO INCREMENT

75. https://www.clever-cloud.com/blog/engineering/2015/05/20/why-auto-
increment-is-a-terrible-idea/

76. Give CLEVER-CLOUD.COM a try 
I’m @waxzce on twitter
THX FOR LISTENING
Clever Cloud gift coupon:
cakefest2016