After a couple of months of not receiving the TLC it deserves, I’ve pushed a major update to Metricinga on GitHub. Here’s the highlights:
- Completely rewritten. I wasn’t really happy with the tight coupling of components in the old version; among other things, it made it really hard to write tests. The new version uses extremely loose coupling between Greenlets, so I can actually get around to writing proper regression tests now. It should also be a lot simpler to support things like writing metrics to multiple backends (StatsD, OpenTSDB, etc.) once that support is implemented — writing to more than one at a time should be really trivial too.
- Better inotify support. Having up-to-date information is really important on some metrics, so I’ve made it a point to have reasonably well-functioning inotify support in Metricinga. It will start dumping metrics in the second a file is closed for writing or moved into the directory.
- Better delete-file handling. In some cases, the old Metricinga could drop data if the file was prematurely deleted before all the parsed metrics were successfully offloaded into Graphite. We now reference-count metrics sourced from a particular file, so files are never deleted until they’re completely sent into Graphite successfully.
- Init script for CentOS/RHEL. Yay!
Grab it, file bugs, file pull requests, let me know what you think!