fosdem'14: configuration management in an enterprise linux team
DESCRIPTION
About a year ago I accepted a new job in an enterprise Linux environment, running ~450 Linux servers. These servers were running on an internal network and had never been updated. Most work was done ad-hoc and in response to issues or failure. I transformed the team to a pro-active way of working where automation was key. By solving the most frequent problems first, we found the time to automate more and more. Every server was updated and configuration management was introduced. One interesting year later I've automated myself out of my job. The team can easily handle the (now much lighter) workload without me. Users are happy, so mission completed! Configuration management is done using CFEngine 3 and we use other DevOps style tools like Git and Vagrant. In this talk I'll talk about the journey we took and answer: - What was the problem with the old way of working? - How did we implement configuration management in an already running environment? - Why did we choose CFEngine 3? - What is the new way of working? - What are the lessons learned? - How to automate yourself out of your job? The presentation will also focus on the process of getting there and the lessons learned, so others can benefit. The presentation was given in the FOSDEM Configuration Management devroom at February 1st 2014 @12:00TRANSCRIPT
automatedHow I
myself outjob of my
@remibergsma
in an enterprise Linux Team
FOSDEM’14 - Feb 1st, 2014 - Brussels
Use case: Configuration Management
@remibergsma
1 2Use case with results.
How to do it yourself.
Today’s story:
Remi BergsmaI am
Engineer with a passion for automation.
@remibergsma
Git repository
automate--- Someone @Google, long time ago (Thanks Kris!)
@remibergsma
“Every 18 months,
yourself out of your job
”
Recap1. WTF: Find out what to fix 2. Save time with quick wins 3. Setup configmgmt baseline 4. Scale out & scale up 5. Relax: full control!
Replace manual work with configmgmt
@remibergsma
Always version your code
use configmgmt.Whatever happens,
And please spread the word!
@remibergsma
Get in touch!
blog.remibergsma.com@remibergsma
Follow me on Twitter I will post the slides soon.
Credits
@remibergsma
Changing permissions animation: http://devopsreactions.tumblr.com/post/73295491766/changing-permissions-that-are-enforced-by-cfengine Fireman Sam Team: http://kidzpadz.co.uk/images/products/63500102343_00.jpg Fireman Sam relax: http://www.flickr.com/photos/thebigsheep/5905236905/sizes/l/ Kris Buytaert mentions the quote “Every 18 months, automate yourself out of your job” in his presentation: http://www.slideshare.net/KrisBuytaert/the-future-of-sysadmin on slide 38.
License
@remibergsma
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.