Configuring a static IP on HypriotOS for the Raspberry Pi

How you configure a static IP on the Pi changed between Wheezy and Jessie, and it seems on Hypriot’s prebuilt images for running Docker on the Pi, it’s a slight variation.

Edit /etc/network/interfaces.d/eth0, comment out the DHCP line:

iface eth0 inet dhcp

and add:

iface eth0 inet static
address your-static-ip
gateway your-gateway-ip
#google dns servers


Docker 1.12 RC on the Raspberry Pi

If you’re excited about playing with the swarm mode in the new 1.12 version of Docker, you can download the release candidates for Linux, Windows, Mac, but it’s not obvious where you can get an ARM compatible version to run on the Raspberry Pi.

The awesome guys over at Hypriot talk about running the 1.12 RC on the Pi, but their prebuilt OS images for the Pi don’t yet include the 1.12 RC version. I found this blog post however, which mentions a download location where you can pick up a .deb file and install it on the Pi with dpkg.

Downloaded, installed on my “to be” Pi cluster of 2 Pis, and up and running! Now to deploy something with swarm 🙂

Mac Docker 1.12.0-rc3-beta18 native client and insecure registry

A while back I set up a local Docker Registry to share images between different machines, and configured it as an ‘insecure registry’ since it’s just for testing. With the latest native Docker engine for Mac OS, I was having difficulty pushing to the Registry, it was just fail with a cryptic message:

$ docker push

The push refers to a repository []

Get http: server gave HTTP response to HTTPS client

I noticed in the Docker menu from the menu bar that there’s a Insecure Registries section under Preferences, Advanced Options. Adding the IP and port of my Registry there fixed my problem, now I can push:

$ docker push

The push refers to a repository []

3d4f4a09f67b: Pushed 

fc91d495516f: Pushed 

5f70bf18a086: Pushed 

532820a7256b: Pushed 

ed62ae893def: Pushed 

994d5442545b: Pushed 

f097d343f850: Pushed 

latest: digest: sha256:c71c6743924243d6117050a1b5b95adf4effee7c9059315c0bfe500f67e0d16b size: 260

Windows History: DOS vs NT sourcecode heritage

As a software developer, I’m fascinated by computer and IT history. I grew up with 8 bit home computers like the Sinclair ZX Spectrum, and developed my first applications in Sinclair BASIC which most likely kickstarted my interest in software development.

I find it interesting when developers have very little interest or knowledge in even recent history of the tools and platforms that they work with every day. For example, statements like “I’m glad Windows 10 no longer has any dependence on MS-DOS like Windows 8 did”, or “Microsoft completely developed Windows 10 from scratch, you know”, – neither statements which could be further from the truth.

Up until Windows XP, Windows was developed as two parallel code lines, the MS-DOS based code line, Windows 1.x through 3.x, 95, 98, and ME, (95, 98 and ME aimed at home consumers) and the Windows NT code line for enterprise users. After Windows ME, Windows XP was developed based on the NT kernel from Windows 2000, with some features taken from ME and it’s MS-DOS code line.

There’s a great history of the parallel code lines in this article on the History of Microsoft Windows on Wikipedia, and clearly illustrated in this diagram:

(From, shared under Creative Commons Attribution-Share Alike 3.0 Unported license).

Windows ME was the last release of the MS-DOS based Windows code line, and Windows 10 is the next release in the Windows NT code line, which as you can see from the timeline above, shares it’s heritage with 8, 7 and Vista before it.