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Latest posts

Dec. 17, 2022

adventures of wireguard peer for a single port service

Overview Want to peer wireguard networks, and isolate it down to a single port of a service that is visible on that interface. For this exercise, we want to expose only port 8096 TCP. TL;DR; it was not just as simple as the first examples you see here. Read to the end for the solution. Also!: I’m no expert on all this, so please reach out to me with corrections or improvements vbatts at hashbangbash dot com

Dec. 14, 2014

I love infomercial gifs

In a recent 5 minute lightning talk on docker, I got a little carried away with the gifs. So good.

Nov. 4, 2014

docker: devicemapper fix for `device or resource busy` (EBUSY)

Audience: This article is intended for folks familiar with docker and looking to fix particular issues encountered when using devicemapper storage/graph driver. Overview: While this is issue not exclusive to devicemapper, the mechanics currently involved in this driver cause it to be affected by this. A couple of the more commons issues seen when using the ‘devicemapper’ storage driver is when trying to stop and/or remove a contianer. In the docker daemon logs, you may see output like: