We finally got around to writing up the blog post discussing the Nextdoor Service Registry module:
http://engblog.nextdoor.com/post/43517659364/nextdoor-service-registry We've been using this module in our Django app (and in zk_watcher) for months now with great success. Its a fast and simple way to dynamically configure your Python-based app with dynamically updated server and service lists. --Matt On Jan 5, 2013, at 4:00 PM, Matt Wise <[email protected]> wrote: > PyPI Page: http://pypi.python.org/pypi/zk_watcher > GitHub: https://github.com/Nextdoor/zkwatcher > > 'zk_watcher' has been bumped to v0.3.1 and had nearly a complete rewrite. > Though there are a ton of small changes, there are two major changes to the > code. > > 1. We've thrown away the Zookeeper C-based bindings (zc.zk backend) and > replaced them with our own 'nd_service_registry' library (based on Kazoo). > This simplifies the zk_watcher code because it doesn't really do much now on > its own to track Zookeeper connections or node-status's. Instead, it focuses > on its main job of proving whether or not your services are up and running. > > 2. The non-threaded model has been replaced with a threaded model. I know > there are concerns with threading in Python ... but this new model is > actually safer in the event that one of your 'check' commands fails to return > in a reasonable amount of time. Additionally, our threading model is very > simple and under testing has proved to be very reliable. > > There are a whole ton of other internal changes... and a few feature > enhancements as well. The entire changelog can be found here: > > https://github.com/Nextdoor/zkwatcher/compare/v0.1.0...v0.3.1 > > We've been running this release in production for the last 3 weeks without > any issues... but as usual, if you find bugs, please let us know! > > --Matt > > (ps, nd_service_registry will get its own announcement/documentation email > after a few more weeks of tuning/tweaking. its entirely functional right now, > but further documentation is necessary before we really ask other people to > use it. that being said, it can be found here > https://github.com/Nextdoor/ndserviceregistry) >
