This document discusses configuration management and provides examples of using Puppet and Chef for configuration management. It defines configuration management as managing the configuration of systems from hardware to applications. It explains that configuration management allows automating repetitive system administration tasks in a scheduled, consistent, auditable, and repeatable way. The document compares Puppet and Chef and provides examples of configuration scripts for each tool. It demos how to use Puppet and Chef to configure a system.

1. TEC118 –
How Do You Manage
the Configuration of
Your Environments
from Metal to
Application
SAP TechEd 2013
Las Vegas
Chris Kernaghan

2. Who am I
Facilitator
Consultant
Systems Admin
• Help IT administrate
• Help business develop and
Infrastructure and applications
deploy leading edge applications
• Design processes which meet
• Curate and administrate flexible
business compliance standards
landscape
• Build/Design flexible
• Additional to project/chargable
infrastructures which are adaptable
work, so primarily done outside
but controlled
hours
• Migrate customers from outdated
• Team members need to be highly
platforms to next generation
adaptable, flexible, autonomous, b
platforms
ought into the SoPs
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3. What is configuration management?
What does it mean
Configuration of a stack
•Hardware
•Virtualisation hypervisor
•Operating system
•Database
•Application
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4. In the beginning
Configuring your applications was easy
SCP/XCOPY – Application deployment
SSH/RDP – Configuration management
Then things got a little more complex
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5. Excel managed configurations
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6. Word based Architecture documents
Configuration Management is not easy
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7. How do you achieve configuration management
Infrastructure as code
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8. Box huggers versus DevOps
Box Hugger
(SAP Technical)
DevOps
(Web Operations)
• Infrastructure is permanent
• Infrastructure is ephemeral
• Manual processes
• Automation is used heavily
• Steps are documented
longhand
• Operations are treated in
the same way as code
• SPOF are common
• Operations are scalable
• Concerned with MTBF
• Concerned with MTTR
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9. Why use Configuration Management
• Systems administration is full of boring, repetitive tasks
• Evolve from thick manual run guides to smaller guides on
automated processes
•Create better results driven compliance processes and
records
• Quicker serial/parallel executions
• The execution of the tasks is more controlled
• There are lots of methods of automation, depending on the
layer you are working within
• OS – System schedulers
• Database – triggers or stored procedures
• Application level – scheduled batch or background
jobs
• Captured input session tools
S – Scheduled
C – Consistent
A – Auditable
R – Repeatable
S – Sharable
Ability to execute
consistent process to
serve multiple
compliance
frameworks with
different
documentation
requirements – eg,
ITIL, SOX, FDA, etc..
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10. Why we do not automate Configuration Management
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11. What can be managed through code
• Virtualisation hypervisor
– Parameters
– Creation of new hosts
• Operating system
– Parameters
– Users
– File system permissions
– Software Installs
• Database
– Patches
–Parameters
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12. Why use Configuration Management
 Scheduled
Agent retrieves
catalog
 Every 30 mins
 Consistent
 Cookbook/Manifest driven
 Auditable
 Results recorded
 Repeatable
 Scheduled every 30 mins
Agent inspects
resources from
catalogue and
submits report
Roll approves
changes into node
baselines
Write code
(cookbook/manifest)
which defines resources
to audit on which nodes
 Sharable
 Scripts exportable
Approve or reject
every
difference, revert
unapproved
changes
Console/Agent
compares node
inspections to
baselines and
reports differences
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13. Configuration Management Systems
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14. Comparison of Configuration Management
Puppet
Chef
CFEngine
Puppetlabs.com
Opscode.com
CFEngine.com
Pull
Yes
Yes
Yes
Push
No
No
No
Idempotence
Yes
Yes
Yes
Config Language Declarative/Ruby
Ruby
Declarative
WebUI
Yes
Yes
No
O/S Support
Linux/Unix/Windows
Linux/Unix/Windows
Linux/Unix/Windows
License
GPL v2
Apache
GPL
Company
Puppet Labs
OpsCode
CFEngine
Cloud
Yes
SaaS
Yes
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15. Puppet and Chef Flavours
Flavours
Serverless Puppet
Chef Solo
Master/Agent Puppet
Chef Client & Server
Puppet Enterprise
Private Chef
Hosted Chef
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16. Puppet Architecture
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17. Example Puppet script
Set up parameter file
Set the file permissions
Confirm the file source
Execute the command
Copy the install media
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18. Puppet Console
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19. Chef Architecture
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20. Example Chef Script
What packages are required
Mount a filesystem
Set the hostname
Restart service to activate
Write entry into hosts file
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21. Puppet Demo
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22. Chef Demo
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23. About Capgemini
With more than 120,000 people in 40 countries, Capgemini is one
of the world's foremost providers of consulting, technology and
outsourcing services. The Group reported 2011 global revenues
of EUR 9.7 billion.
Together with its clients, Capgemini creates and delivers
business and technology solutions that fit their needs and drive
the
results
they
want.
A
deeply
multicultural
organization, Capgemini has developed its own way of
working, the Collaborative Business ExperienceTM, and draws on
Rightshore ®, its worldwide delivery model.
Rightshore® is a trademark belonging to Capgemini
www.capgemini.com
The information contained in this presentation is proprietary.
© 2013 Capgemini. All rights reserved.