Bonum Certa Men Certa

Q&A With Puppet Labs' James Turnbull Regarding Pro Puppet

[As ODF | As PDF]



Introduction:

As someone who deals with Puppet quite a lot at work, I had the great pleasure of speaking to longtime open source pundit James Turnbull, who recently co-authored his latest book "Pro Puppet” through Apress Media with colleague Jeffrey McCune of Puppet Labs. This is his fifth technical book about open source software. "Pro Puppet" is an in-depth book about how to install, use, and develop Puppet, the popular open source systems management platform used by organizations including Twitter, Rackspace, Digg, Genentech and more.



Q&A with James Turnbull

1. What in your estimation is the number of servers (including virtual instances) that run Puppet at any level of capacity?

A: This is a question that I ponder every few months. Our largest installation is around 50,000 nodes and we have several more at the 25,000 to 50,000 node range. Given the size of the community, I think we’ve quite easily reached the million plus node mark.

“Given the size of the community, I think we’ve quite easily reached the million plus node mark.”
      --James Turnbull
2. Throughout your work on the book, have you had a chance to measure/survey the operating systems on which Puppet is deployed? Have you any insight regarding the distribution of usage?

A: Puppet Labs did a survey earlier in the year and gathered some data about usage. Based on that and interactions with the community I think we can pretty comfortably say that our core operating systems are Linux-based with Red Hat (and derivatives) and Ubuntu/Debian being the biggest platforms. The next largest block is Solaris with a smaller number of OSX, *BSD, HP UX and pSeries/AIX systems also being represented.

3. There is a common perception that Free/Open Source software suffers from deficient documentation and lack of support (despite this being the business model of many companies). How do you challenge these types of allegations?

A: This is a common perception that regularly makes me laugh. I usually respond that all software has deficient documentation and lacks support! It’s true some open source tools lack documentation but others, for example MySQL, have exemplary documentation. Some open source software communities are hard to get help from and others fall over themselves to help people out. I’m always immensely proud of how the Puppet community, which is largely made up of some of the busiest people in IT - sysadmins, goes out of its way to help newcomers and share knowledge.

Of course this same problem is present across enterprise and commercial software. Otherwise authors wouldn’t be able to sell books offering insights into using commercial software. :) It’s even perhaps somewhat worse for enterprise software where submitting a bug request can lack transparency and where examples of how others have solved issues can be hard to find or perceived as proprietary information.

4. How can your book address or assist a crowd of people with no prior knowledge of UNIX/Linux and how can it assist those who are familiar with everything but Puppet?

A: Pro Puppet is aimed at users with some Linux/Unix knowledge, albeit at a fairly basic level -- a few friends and I created an earlier book called Pro Linux System Administration designed to teach someone with zero Linux knowledge how to be a Linux sysadmin. Pro Puppet is aimed at junior and mid-level sysadmins looking to get started with Puppet and take them through to advanced topics like scaling and extending Puppet.

5. What impact do you foresee the licensing changes from the GPL to the Apache licence as having?

A: Both the GPL and Apache licenses are free and open source licenses and we’re very much staying true to our open source roots. However where we are with Puppet now we need a license that people, for whatever reasons, consider easier to integrate with. In the open source world that license is Apache and we’re already starting to see Puppet being used heavily as an integrated tools in Cloud and Infrastructure/Platform as a service (IAAS, PAAS) offerings as a result.

6. Manual operators of Puppet seem to rely mostly on the initial setup. What proportion of the work would you say a Puppet expert needs to invest in setting up the software compared to the overall lifetime of a box and its operation?

A: With Puppet, the large proportion of the work you need to do to get started is up front. Once you’ve done that work setting up new boxes becomes a routine and easy task. Maintaining and managing them is also fast and simple. Indeed, one of the benefits of Puppet is that not only do you get fast and automated setup, but you can make sure they stay the way you configured them for as long as you need. That ability to stem the tide of configuration drift and limit the potential for human error and entropy causing issues is an enormous timesaver.

7. What is the most eccentric/fascinating/uncommon use of Puppet that you have come across?

A: One that fascinated me recently is the Deutsche Flugsicherung, the German air traffic control network, who use Puppet to ensure all the operator workstations and tower servers are up to date. They have a very strict and structured work flow and an interesting deployment model where any configuration drift is anathema. I also find Air Traffic Control really interesting (I’m a geek it’s true) so it was pretty exciting to see Puppet being used in such an interesting arena.

8. Puppet functionality lags behind in platforms such as Windows. What would you advise organisations that choose to run it on this platform?

A: We’re actively working on Microsoft Windows support but we’re not there yet. What we’d love to see is people telling us what they need. I’m not primarily a Windows guy so I actually don’t know what the pain points are for Windows sysadmins. If a few of them could tell us “If you automated these 4, 5, 10 things that would make my job easier!” then that would help us structure that future support.

9. How does Puppet compare to its proprietary counterparts?

A: I think the key difference is time to value or as I prefer “how long before I’m doing something useful”. Often when you install one of the larger proprietary tools it can take significant time and people to deliver value or to get things done. We find people can download Puppet, install it and be doing something useful in a matter of minutes or an hour rather than months.

“One of the new features in Puppet 2.6.0 though was a Ruby DSL for Puppet. This allows any developer (and sysadmins too) to write their Puppet manifests in Ruby.”
      --James Turnbull
10. If one receives proper training or learns from your book, how would the difficulty of using Puppet compare to the difficulty of using other products that are out in the market?

A: I think Puppet is pretty easy to use (but I’m also biased!). It does have rough edges and things that are hard to get your head around though. One thing I think we do really well in the book is build on knowledge. You can start simple and grow into the more complex topics. I think having that sort of resource makes it really easy for people to learn how to use Puppet. The other resource I’m really excited about is a new section in the documentation called Learning Puppet (http://docs.puppetlabs.com/learning/) that offers a similar “grow into using it” experience.

I think as a result of having the book plus documentation and training available that makes Puppet a lot less difficult to understand than some of the alternatives out there.

11. How would you say the Puppet learning curve compares if a programmer and non-programmer were both faced with the task of learning it?

A: I recently came to the conclusion that I now spend more time cutting code than I do being a sysadmin which is a big change in my life. As a result I’ve been thinking about how both groups approach learning and problems. I think for a lot of sysadmins Puppet is very easy to engage with. Puppet’s language is a logical extension for people use to dealing with configuration files and scripts.

For developers that’s perhaps not as natural a progression and some have struggled in the past with learning Puppet. One of the new features in Puppet 2.6.0 though was a Ruby DSL for Puppet. This allows any developer (and sysadmins too) to write their Puppet manifests in Ruby. This approach is something that may make more sense and make it easier for developers to learn Puppet.

As a result of this Ruby interface (which we cover in the book too) I think the learning curve for both non-developers and developers is rapidly approaching parity.

Conclusion:

We would like to thank James for being available for this interchange of insights and we hope his literature will spread Puppet to more and more companies, aiding the spread of Free/open source in systems management. Puppet sure helps the company that I work for.

Recent Techrights' Posts

Links 10/06/2025: Jaws at 50 and US Democracy Crushed Very Rapidly (Martial Law Seems Imminent)
Links for the day
Abuse Inside the Polish Patent Office (UPRP) - Part VII: Washing Their Hands After Corruption and Abuse
"Tragedy or comedy?"
Culling Bad RSS Feeds of Bad Sites
Not throwing out the baby with the bathwater
Live as You Preach
technology is fast becoming dysphoric
 
Links 10/06/2025: Apple Hype and Physical Attacks on Bloggers
Links for the day
Gemini Links 10/06/2025: Loon Lake, Farming, and Forth
Links for the day
If 'Microsoft v Techrights' is Dealt With by a 'Microsoft Court' (or a Court Outsourced to Microsoft)
More on that later
Over at Tux Machines...
GNU/Linux news for the past day
IRC Proceedings: Monday, June 09, 2025
IRC logs for Monday, June 09, 2025
Gemini Protocol Turns Six in 10 Days From Now
If you haven't tried it yet, then give it a go today
Gemini Links 09/06/2025: Addition Addiction and Nitride
Links for the day
Links 09/06/2025: Science, Hardware Projects, and Democracy Receding
Links for the day
Computers Got Smaller, So GNU/Linux Got Bigger
Many people here recognise the lack of urgency (or need) to get expensive new laptops
BetaNews is a Plagiarism and LLM Slop Hub, the Chief Editor Isn't Addressing This Problem Anymore
SS Fagioli is basically a parasite leeching off or exploiting other people's work
Links 09/06/2025: Chaos in Los Angeles and Hurricane Season
Links for the day
GNU/Linux Grows at Windows' Expense and Microsoft Trolls Infest and Maliciously Target Articles About It
Microsoft is - and has long been - organised crime
They Say I'm Mr. Bombastic
They didn't take good lawyers
Links 09/06/2025: Windows TCO and Many Data Breaches
Links for the day
Abuse Inside the Polish Patent Office (UPRP) - Part VI: Political Stunts by Former President Edyta Demby-Siwek and the Connection to Profound Corruption at EUIPO
it's like a money-laundering operation where one politician rewards another at taxpayers' expense
Gemini Links 09/06/2025: Pipelines and Splitgate
Links for the day
Over at Tux Machines...
GNU/Linux news for the past day
IRC Proceedings: Sunday, June 08, 2025
IRC logs for Sunday, June 08, 2025
Links 08/06/2025: Tiananmen Carnage Censorship Persists, North Korean Goes Offline
Links for the day
Gemini Links 08/06/2025: Love as an Ethnographic Method and Monitorix Gemini-Frontend v0.1
Links for the day
Links 08/06/2025: Exposure of More GAFAM Surveillance and Social Security Records Compromised
Links for the day
Linux Foundation is a Mediator for Microsoft et al, Not for Small Companies That Support Rather Than Attack the GPL
Many people still wrongly assume that because it is called "Linux Foundation", then it is pro-Linux and represents the same mindset
This Past Friday, Confirming What We Said All Along About Brett Wilson LLP: It's Shrinking, Has Considerable Debt, Loss of Net Assets Despite the Microsoft SLAPP Money
The documents only became publicly available less than 2 days ago
Some of the Many Reasons We Sued Microsofters for Harassment
perpetrators of harassment
For 20 Years Many People Were Sharecropping for Canonical's Oligarch, Now He's Deleting All Their Contributions
"Ubuntu has erased instead of archiving the trove of material at Ubuntu Forums"
There Was Always Too Much 'Crazy Stuff' Going on Around Freenode
What many IRC users lost sight of
Exposing Crime is Not a Crime (It Never Was)
In the eyes of rich and powerful people, those who speak about their crimes are the "criminals"
GNU/Linux Distros Abandoning Microsoft GitHub
Will curl be next to leave Microsoft GitHub?
Expect More XBox Mass Layoffs Soon If the Rumours Are True
From a Microsoft media operative
Over at Tux Machines...
GNU/Linux news for the past day
IRC Proceedings: Saturday, June 07, 2025
IRC logs for Saturday, June 07, 2025
Europe Needs to Move Away From GAFAM; The Sooner, the Better
Europe - not just the EU - must abandon GAFAM as soon as possible
The Issue Isn't GNOME's Promotion of Diversity But GNOME Corruption, Abuse, Censorship, and Worse
So-called "Conservative" (republican, pro-Trump, bigoted) people want you to think the problem with GNOME is politics
When the News Sources Become Scarce and Increasingly Full of Polluted/Contaminated 'Content' (With LLM Slop and Slop Images)
Integrity matters
"Linux" Sites That Spew Out LLM Slop
We're lacking enough material for another "Slopwatch"
Abuse Inside the Polish Patent Office (UPRP) - Part V: Breaking the Law, Just Like EPO
We'll hopefully cover some of the pertinent details later this year