Author Archives: Dan

Jeep JK Air Tank Install

A year ago, I added onboard air to our Jeep. It had always been something I wanted to do (since the last Jeep) and I can say it’s definitely one of the best things I’ve done to it. Not only … Continue reading

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Oregon Back Country Discovery Route Maps from OOHVA

I recently found out about a bunch of cool backcountry overlanding routes maintained by the folks at Oregon Off-Highway Vehicle Association (OOHVA) called the Oregon Back Country Discovery Route (OBCDR). These routes are hand-picked to provide hundreds of miles of … Continue reading

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Automatic cycle hack for a small compressor

This is a project I did quite a while ago, which has been working well for me ever since. I get a lot of looks when airing up my tires and so I thought I’d do a bit of a … Continue reading

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Evacuate in nova: one command to confuse us all

If you’ve ever used OpenStack Nova, you’ve probably at least seen our plethora of confusing commands that involve migrating instances away from a failing (or failed) compute host. If you are brave, you’ve tried to use one or more of … Continue reading

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Upgrades in Nova: Database Migrations

This is a part of a series of posts on the details of how Nova supports live upgrades. It focuses on one of the more complicated pieces of the puzzle: how to do database schema changes with minimal disruption to … Continue reading

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Upgrades in Nova: Objects

This is a part of a series of posts on the details of how Nova supports live upgrades. It focuses on a very important layer that plays several roles in the system, providing a versioned RPC and database-independent facade for … Continue reading

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Upgrades in Nova: RPC APIs

This is a part of a series of posts on the details of how Nova supports live upgrades. It focuses on the very important task of doing proper versioning and handling compatibility in your RPC APIs, which is a baseline … Continue reading

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Upgrades in Nova: The Details

Over the last few years, the Nova project has spent a lot of time on improving its story around live upgrades. We’ve made a lot of progress and done so with minimal disruption as we were figuring out how to … Continue reading

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Upgrading Nova to Kilo with minimal downtime

Starting in Icehouse, Nova gained the ability to do partial live upgrades. This first step meant that control services (which are mostly stateless) could be upgraded along with database schema before any of the compute nodes. After that step was … Continue reading

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Execuhitch on a 2012 BMW X5 M-Sport

Apparently, the X5 is about the most complicated “utility vehicle” to use for towing. I don’t know why BMW doesn’t make this easier, but they don’t. Their OEM hitch option is clearly an afterthought and looks terrible, especially on an … Continue reading

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