Author Archives: Dan

2007 Audi A4 LED DRL Conversion

There is no shortage of writeups online about converting a B7’s ugly yellow daytime running lights to LEDs. It was Nick’s that made me decide to do the actual conversion, and part of the reason why I decided to add … Continue reading

Posted in Cars Tagged , , , , , ,

The magical sleeping development machine

For years now, I’ve preferred to do all my development on a dedicated machine. This means my desktop (or laptop, depending) is just a glorified terminal-and-editor-running appliance. It probably comes from years of crashing boxes during kernel development, but it … Continue reading

Posted in Linux Tagged , , , , ,

Multi-room audio with multicast RTP

Our house has speakers in the ceiling in almost every room. This is not something I’ve had before, and was initially skeptical about usefulness and fidelity. However, I’ve actually been enjoying having the background music while working be spread further … Continue reading

Posted in Hardware Tagged , , , , , ,

Don’t touch my Schiit!

As a work-from-home-er and a music fan, having good audio in my home office is important. Until recently, I’ve used my laptop to feed a two-channel amp and some decent speakers. A large collection of digital audio, combined with MPD … Continue reading

Posted in Hardware, Linux Tagged , , , , ,

A Manual Tune Button for the LDG AT-7000

The LDG AT-7000 automatic tuner is very popular among Icom HF radio owners, especially those with IC-7000 and IC-706 radios. It’s small, simple, and works really well. The problem is, it’s so simple that it has no controls of its … Continue reading

Posted in Radio Tagged , , , , ,

A brief overview of Nova’s new object model (Part 3)

In parts one and two, I talked about the reasoning for developing an object model inside of Nova, as well as showed a sample implementation for a toy object. In this part, I will examine parts of some “real” objects … Continue reading

Posted in OpenStack Tagged , , , , , ,

A brief overview of Nova’s new object model (Part 2)

In Part 1, I described the problems that the Unified Object Model aims to solve within Nova. Next, I’ll describe how the infrastructure behind the scenes achieves some of the magic of making things easier for developers to implement their … Continue reading

Posted in OpenStack Tagged , , , , ,

A brief overview of Nova’s new object model (Part 1)

As discussed at the Havana summit, I have been working with Chris Behrens (and others) on the unified-object-model blueprint for Nova. The core bits of it made their way into the tree a while ago and work is underway to … Continue reading

Posted in OpenStack Tagged , , , , , , ,

A tool for watching Zuul and Jenkins

In my work on OpenStack Nova, I often have multiple patches in flight somewhere on the CI system. When patches are first submitted (or resubmitted) they go into Zuul’s “check” queue for a first pass of the tests. After a … Continue reading

Posted in OpenStack Tagged , , , , ,

Dan’s Partial Summary of the Nova Track

Last week, OpenStack developers met in Portland, OR for the Havana Design Summit. Being mostly focused on Nova development, I spent almost all of my time in that track. Below are some observations not yet covered by other folks. Baremetal … Continue reading

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