Matt Williams

Author's details

Name: Matt Williams
Date registered: August 9, 2008
URL: http://matt@matthewkwilliams.com

Biography

Matt Williams lives in Columbus, OH, in a house filled with computers, cats, books and fiber. Pursuing the goal of being a modern Renaissance person, he plays with his daughter, cooks, roasts coffee, reads, weaves, studies, and hacks, including crazy ideas like a Cloud in a Box. Docker has been an especial passion since June of 2013.

Latest posts

  1. Weaving with Light Pt. 1 — August 31, 2016
  2. Abusing HAProxy: Stupid Simple Easy Dashboards — June 24, 2016
  3. Rules for Operations — April 25, 2016
  4. DevOps Creed (Work in Progress) — April 24, 2016
  5. I am not a Mindreader: a mini-saga — April 11, 2016

Most commented posts

  1. Swarming Raspberry Pi – Part 1 — 13 comments
  2. Docker, Cgroups, Memory Constraints, and Java: A Cautionary Tale, or Here be Reapers (sometimes) — 9 comments
  3. Shrinking Docker Images — 7 comments
  4. Rails & JRuby in a Jar — 7 comments
  5. rspec, restful_authentication, and login_required — 6 comments

Author's posts listings

Mar 22

Consul for Raspberry Pi is Alive

Categories:

cloud, cloud-in-a-box, consul, Docker, nimblestrat.us, Raspberry Pi

by

consul-web-ui2

This version is forked from http://github.com/progrium/docker-consul and runs on the Raspberry Pi. Thanks to Jeff Lindsay for all his hard work. I am merely standing on the shoulders of giants. This initial version is a bit largish — ~500Mb; I think it’s mostly due to needing a go build environment. I think I can use …

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Mar 22

Docker Cleanup

Categories:

Docker, tips

by

After a time, Docker containers and images build up and can eat disk space. Failed docker build invocations can leave a lot of artifacts behind. The following commands can help. Many of them say ‘not all containers could be removed’; this has to do with the header from docker ps. Usually this can be ignored. …

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Mar 21

Swarming Raspberry Pi – Part 1

Categories:

cloud, cloud computing, cloud-in-a-box, Docker, howto, nimblestrat.us, Raspberry Pi, Uncategorized

by

swarm-result

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 …

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13 comments

Mar 20

Nifty Things for Week Ending 20 March

Categories:

Nifty Things

by

The Return of Persephone by Frederic Leighton

Welcome to the Vernal Equinox. Hopefully this means that Fimbulwinter is averted once more! Blast from the Past Random Quotes — using Ruby to get a random quote from ThinkExist Data Visualization 30 Simple Tools For Data Visualization | Co.Design | business + design Gephi – The Open Graph Viz Platform Datavisualization.ch Selected Tools dimple …

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Mar 19

Pi on a Pi Followup

Categories:

Followup, programming, Raspberry Pi

by

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 …

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Mar 17

Lost in a Maze of Twisty Little Java Classes: How often is “infinite scalability” and extensibility really needed?

Categories:

Just Enough Programming, philosophy, rants

by

Yagni, the Development Assistant

But look, you found the notice, didn’t you? Yes yes I did. It was on display at the bottom of a locked filing cabinet stuck in a disused lavatory with a sign on the door saying Beware of the Leopard. — Mr. Prosser and Arthur Dent, The Hitchhiker’s Guide to the Galaxy While digging through …

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Mar 17

Mounting Images on Linux

Categories:

miscellany, tools, utilities

by

This is mostly for reference, but may be of use to others. In order to mount an image (in order to be able to edit it), you can execute the following code:

This is useful for editing one or more files in an image without needing to copy it to a device or card.

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Mar 17

Pi on a Pi for Pi Day

Categories:

programming, Raspberry Pi

by

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 …

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Mar 13

Nifty Things for Week Ending 13 March

Categories:

Nifty Things

by

Littleprince

AT LAST, SIR TERRY, WE MUST WALK TOGETHER Philosophy & Lessons Learned 7 timeless lessons of programming ‘graybeards’ | ITworld Monitoring IEEE Xplore Abstract – Tracking Transaction Footprints for Non-intrusive End-to-End Monitoring Blast from the Past Oooh Shiny! Magpies don’t know what’s just enough! » Ramblings Raspberry Pi Intertech’s Complete Raspberry Pi Class Materials – …

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Mar 11

Pi Metrix

Categories:

golang, Raspberry Pi, tools

by

johnny-automatic-metric-weights

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 …

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