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Pizza and Soda Donation

“Safer Puppet” in 4 quick demos

Topic: “Safer Puppet” in 4 quick demos
Thomas Limoncelli
 Thursday, May 7th, 2015
Time: 7:00pm (social), 7:30pm (discussion)

If you are planning on coming please RSVP

Lawrence Headquarters Branch of the Mercer County Library
2751 Brunswick Pike
Lawrenceville, 08648-4132
See map: Google Maps (New link with better coordinates)

Nervous about making big changes to your systems with Puppet?  Tom will present 4 techniques we use at Stack Exchange, Inc. that will increase your confidence in the changes you make using Puppet.
  • Infinite source code “undo” using Git
  • Automatic testing and deployment using TeamCity
  • Build a test environment on your laptop using Vagrant
  • Test changes in production safely using Puppet Environments and –noop
If the WiFi is working, Tom will make live changes to Stack Exchange, Inc’s infrastructure during the presentation.


Tom Limoncelli is a member of LOPSA’s NJ Chapter, best know for books like Time Management for System Administrators (O’Reilly) and The Practice of System and Network Administration (Addison-Wesley). He works in New York City at Stack Exchange, home of and  His new book, The Practice of Cloud Administration is due out in September 2014:


“LOPSA-NJ is an organization for system administrators in New Jersey formed to facilitate information exchange pertaining to the field of system administration. LOPSA-NJ is not affiliated with a particular hardware or software vendor or company. Everyone is invited!”