A discussion of how Puppet's model-driven nature provides the platform for its future.

1. Puppet and our Model-
driven future
Luke Kanies
luke@reductivelabs.com
Founder, Reductive Labs
Portland, Oregon
USA

2. A bit about Puppet

3. You pull the strings,
Puppet does the work

4. 0
SSH

5. “...at Google we're
currently using Puppet to
manage close to 6,000
Macs, and it's likely our
deployment will expand
dramatically beyond
that....”

6. Written in Ruby

7. Why does Puppet
exist?

8. Embarrassment

9. Fear

10. Somebody has to do something, and it's
just incredibly pathetic that it has to be us.
-- Jerry Garcia

11. Why didn’t someone
else make it?

12. Sysadmins do too
much
Image from http://flickr.com/photos/shirleytwofeathers/2068713495/

13. Speciation
Image from http://flickr.com/photos/kenskritters/2128853769/

14. Sysadmins know too
much

15. An Analogy
Programming SysAdmin
Low-level, commands
Assembly
non-portable and files
Abstract,
C* Resources
portable
* For small values of
abstract

16. Virtualization and
the cloud

17. Hardware Provisioning Deployment
Old Days
Cloud Days
0H 100H 200H 300H 400H

18. Dell
Hardware Provisioning Deployment
Old Days
Cloud Days
0H 100H 200H 300H 400H

19. Dell
Hardware Provisioning Deployment
Old Days
Cloud Days
0H 100H 200H 300H 400H
You

20. “We’re here for your
sysadmins”

21. Would your boss pick:

22. Would your boss pick:
• The current service quality at a lower
price?

23. Would your boss pick:
• The current service quality at a lower
price?
• A higher service quality at the current
price?

24. Let’s talk about you

25. Some questions

26. Some questions
• How many of you have written software to
manage computers?

27. Some questions
• How many of you have written software to
manage computers?
• How many have published this software?

28. Developer Sysadmin

29. Three
people
Developer Sysadmin

30. Puppet allows you to
bridge that gap
Image from http://www.flickr.com/photos/patrick-smith-photography/2969769911/sizes/o/

31. Either you can manage many
machines with little effort

32. Either you can manage many
machines with little effort
Or you can’t

33. Puppet and model-
driven administration

34. Resource Abstraction
Layer (RAL)

35. Do you really care how
rpm works?

36. Resource Providers
23 package types
Users in NetInfo, useradd, pw
Builtin support for RHEL, OS X, Solaris,
Debian, Ubuntu, Gentoo, SuSE, FreeBSD, and
more

37. Resources are
specified in code

38. Code is compiled
into a catalog

39. The client gets a
catalog, not code

40. Least Privilege is
in the house

41. If it’s not in the catalog,
it’s not managed

42. If it’s not in the catalog,
it can’t affect the system

43. "Exec[createrepo-PM-RHEL5-noarch]"
Compiled Catalogs
"Yumrepo[PM-RHEL5-x86_64]"
are a DAG
"Package[postgresql-server]"
"Postgres::Role[puppet]"
"Package[thttpd]"
"File[/var/www/thttpd/html/yum-PM-RHEL5-x86_64]" "File[/var/www/thttpd/html/yum-PM-RHEL5-noarch]"
"Exec[rsync-rpmdir-PM-RHEL5-x86_64]" "Exec[rsync-rpmdir-PM-RHEL5-noarch]"
"Exec[createrepo-PM-RHEL5-x86_64]"
"Yumrepo[PM-RHEL5-noarch]"

44. Is this file being
managed by Puppet?

45. Which services will I
need to restart if I edit
this file?

46. Who requires this
package?

47. Classes are modeled

48. Code or Data?

49. Perspective Shift

50. Functional Areas
• Specification and validation system
• Auditing and application engine

51. Code
Catalog
Compiler Transaction
Report

52. Data and Artifacts
• Configurations and code
• Compiled Catalogs
• Transaction Reports
• etc.

53. Compile Apply
Code Catalog Report

54. So?

55. Caching

56. Integration

57. Actual Future

59. Simple Tools

60. Which resources are
being managed

61. Validation prior to
shipping

62. Compile Apply
Code Catalog Report

63. CMDB
Compile Apply
Code Catalog Report

64. CMDB
Compile Apply
Code Catalog Report
LDAP

65. Policy
CMDB Compliance
Compile Apply
Code Catalog Report
LDAP

66. Policy
CMDB Compliance
Compile Apply
Code Catalog Report
LDAP CMDB

67. Policy
CMDB Remedy
Compliance
Compile Apply
Code Catalog Report
LDAP CMDB

68. Policy
CMDB Remedy
Compliance
Compile Apply
Code Catalog Report
LDAP CMDB
Nagios

69. Resource/Event
Correlation

70. Questio