Mar 21
Here’s the first in a series of building a robust docker swarm of raspberry pi hosts. This installment goes through installing the Pi(s), modifiying the Docker Daemon config, and starting up a test to verify that everyone can join the cluster. The cluster which I am using consists of Raspberry Pi B+ x 5 Raspberry …
Mar 19
The particular algorithm used in calculating Pi is one which converges to Pi as you add terms; it’s not calculating out to a number of digits, although I might try that one as well at some point. Here’s the output from a run; it’s interesting how it gets closer and closer, but… Another interesting thing …
Mar 17
EDIT: The metrics below are skewed. Not all JVM’s are created equal. For updated metrics on the Pi, please see JVM Choice Matters (a lot!). What better thing to do on Pi Day than to calculate Pi? I figured while I’m at it, I might as well do some performance testing of the Raspberry Pi …
Mar 11
I really like that go can produce static executables which do not require any dynamic libraries; this is especially useful for sysadmin tools. Metrix is one such tool — it is a single executable which is able to gather a variety of metrics and send them to different aggregators (by default it is sent to …
Mar 10
I’ve pushed nimblestratus/rpi-swarm to the Docker Hub. It was pretty easy to port — basically stock Swarm, with Dockerfile changes needed for the Pi. Thanks to hypriot for the hypriot/rpi-golang container which I used as a base. One caveat…. only containers which are created for the Pi will be able to run on the Raspberry …
Mar 06
I have been experimenting with Raspberry Pi computers with the intent of having a small cloud that I can take with me to talks. Plusses: I can have a good sized cluster in a small volume. Low power draw (6W or less per computer) With the release of the Pi 2, distribution based upon available …
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