https://chrisa.github.io/ Recent content on Chris's Blog Hugo -- gohugo.io en-us Sat, 26 Jan 2013 00:00:00 +0000 https://chrisa.github.io/blog/2013/01/26/a-perl-ustack-helper/ Sat, 26 Jan 2013 00:00:00 +0000 https://chrisa.github.io/blog/2013/01/26/a-perl-ustack-helper/ I’ve done some work with DTrace and Perl, using my Devel::DTrace::Provider and Andy Armstrong’s Devel::DTrace, but there’s never been a ustack helper: because of the structure of the Perl interpreter, it’s impossible to write one – at least, in the intended manner… https://chrisa.github.io/blog/2012/07/22/deploying-a-pki-with-chef/ Sun, 22 Jul 2012 00:00:00 +0000 https://chrisa.github.io/blog/2012/07/22/deploying-a-pki-with-chef/ Traditionally, rolling out an X.509-style PKI has been a lot of work. You’ve got to create the CA, generate all the necessary private keys and distribute them securely, create signed certificates and distribute those, and then do it all again when renewal time comes around. https://chrisa.github.io/blog/2012/07/05/custom-chef-gem-resources/ Thu, 05 Jul 2012 00:00:00 +0000 https://chrisa.github.io/blog/2012/07/05/custom-chef-gem-resources/ Since Chef 0.10.10, there’s been a new core resource for installing Ruby gems to support Chef cookbooks: chef_gem. https://chrisa.github.io/blog/2011/12/04/libusdt-runtime-dtrace-providers/ Sun, 04 Dec 2011 00:00:00 +0000 https://chrisa.github.io/blog/2011/12/04/libusdt-runtime-dtrace-providers/ With this post I’d like to introduce libusdt, a library for creating DTrace USDT providers at runtime, intended as the basis for implementing custom DTrace providers in dynamic languages, but applicable wherever the provider definition isn’t known at compile time. https://chrisa.github.io/blog/2011/12/03/ruby-1.9.2-and-yaml/ Sat, 03 Dec 2011 00:00:00 +0000 https://chrisa.github.io/blog/2011/12/03/ruby-1.9.2-and-yaml/ I found another gotcha when embedding MCollective in a larger application: Ruby’s YAML library situation. Historically Ruby has used the Syck library, but since 1. https://chrisa.github.io/blog/2011/10/25/embedding-mcollective/ Tue, 25 Oct 2011 09:32:00 +0000 https://chrisa.github.io/blog/2011/10/25/embedding-mcollective/ MCollective is “a framework to build server orchestration or parallel job execution systems”. It’s very easy to create and deploy agents to your hosts, and then interrogate or instruct them with simple command-line tools.