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hidden in plain sight

There's been many a time when I've asked the question "I wonder how many hosts are sending this metric?" Unfortunately there's no built-in Graphite function for determining the number of hosts submitting a particular metric (or tree of metrics). But this morning I stumbled across a brilliant hack of a Graphite query by Jesse Newland (@jnewland) for rendering this value.

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Sometimes the silliest features are the ones that inspire you most. This was certainly the case with the new Chartroulette view that I recently merged into Descartes. Because I wanted so badly for this to become a reality it forced me to knock out some other dependencies (user model, favorite dashboards, and better user mapping) rather quickly.

To be fair, there's nothing silly about the idea behind Chartroulette. At GitHub we have an internal app by @maddox that allows users to rotate any Mac or iOS-based device's screen through a series of website URLs. Typically we use this to cycle through dashboards or graphs. While I'd love to see this open-sourced, I know that Jon is a very busy guy so I figured that emulating this functionality within Descartes might be the next best thing.

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This is a relatively minor enhancement in terms of LoC but it would take too many words to describe on Twitter so here we are. Recent commits added support for passing interval and columns parameters into Descartes views (graphs, dashboards, etc). Previously you would always get the default layout whenever loading any Descartes page.

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In the process of setting up some graphs for Status Board, I thought it would be nice to render my GitHub activity (in terms of commits). As I demonstrated in a post last year, you can fire off a metric to Graphite using GitHub's post-commit webhook feature. Rendered with drawAsInfinite, this is nice for getting a rough visualization of your commit activity, but doesn't provide total counts. Alternatively, you could use group with summarize to get totals per interval, but you wouldn't be able to view per-repository numbers.

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I was recently cold-emailed about a new service, Catincan, that offers a Kickstarter-like bounty system for open source software projects or features. Someone representing the company reached out to me (and presumably, many others in the open source community) for feedback, generally about the funding of open source development, and specifically about their own service.

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You say you want to contribute to an Open Source project, but you're not sure where to start? Have an interest in monitoring, trending or logging software? Hop on over to the Monitorama Hackathon issues list and take a look around. In the weeks leading up to the event we seeded the repo with a bunch of tasks/feature requests/bug reports that are easily digestible over the course of a day or two. These are a great place to get started on a new project, or nail out some quick issues that have an immediate impact.

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Last year I gave examples for using drawAsInfinite to help visualize the frequency of particular events (deploys, commits, etc). One of the side effects that I failed to mention is that these will quickly fill up your legend with labels, making it impossible to view the legend at all. It's likely that you've seen this sort of thing at least once (assuming you forced hideLegend=false):

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I was looking at some internal data for @jnunemaker and @jfryman today when I stumbled across the Data Filters group of functions inside the Graphite composer. These functions are handy for those times when you want to exclude a subset of a particular series of data, for whatever reason. In our case, we were looking at some metrics where we had spikes of data that were interesting, and a lot of uninteresting data reported as zeroes.

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This is not your typical conference review. This is a braindump of my thoughts following the organization and execution of the 2013 Monitorama Conference and Hackathon in Boston (Cambridge), Massachusetts.

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One of the overarching themes that drove me to organize Monitorama was the desire to bring together OSS developers in an effort to improve the current state of monitoring and trending software. I grew impatient with the lack of measurable progress that happens at the typical SysAdmin/WebOps/DevOps-style events, which tend to focus on automation and traditional operations fare. While I'm pleased that everyone is excited about our speaker lineup, the works we accomplish at this Hackathon will be the true barometer of our success. With this in mind I have some points to consider as you prepare for your attendance and participation at the event.

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