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K8S Tiller/Helm History Cleanup

May 30, 2019 thijs Comments 2 comments

GitHub Project: https://github.com/atkaper/k8s-tiller-history-cleanup Introduction In our on premise Kubernetes cluster, we use Helm for a big part of our application / micro-services deployments. Helm uses an engine called Tiller (which is a deployment in the cluster). It executes the installs / updates / deletes, and it stores the results of deployments in the system as config maps. While migrating our applications to a new K8S cluster, we saw that we forgot to set a limit on the history which is…

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cloud, helm, k8s, kubernetes, software, tiller

Duplicate unprotected Mifare Classic NFC Card

May 7, 2019 thijs Comments 0 Comment

Where I live, they have changed the way they pickup garbage. Only plastic, paper, and green-stuff will be picked up (in separate bins). And the ordinary (formerly grey) trash you need to bring to one of the central bins in the neighborhood (and glass you have to bring to the bins at the shopping mall). So, those central “grey” bins… to prevent just anyone from dropping stuff in there, you need to use an RFID badge to open it up….

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electronics, nfc, other

Sonoff Firmware Update – Lava-lamp Switch

February 10, 2019 thijs Comments 0 Comment

I have a lava-lamp, which should not be on for more than 5 or 6 hours at a time. So I decided to move it from switching on/off manually to something a bit more automated. For this I reprogrammed a Sonoff WiFi switch (based on the ESP8266). Now it can be controlled via voice commands (via Alexa / Amazon’s Echo Dot), and via some simple CURL (Wifi) command line call’s. The curl’s are put in a cron (timer) process on…

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electronics, esp8266

WordPress Plugin – Meta Robots

January 25, 2019 thijs Comments 2 comments

Mini project of the day… I did create a tiny WordPress plugin, to add a meta robots header to some of my pages, to prevent them from being indexed by google and other search engines. So without further ado, here’s the source code, to be put in a file: wp-content/plugins/meta-robots/meta_robots.php in your WordPress installation folder: After adding this code, go to your plugin configuration, and enable the plugin. It should show up in the list automatically. To enable the header,…

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php, plugin, seo, software, wordpress

3D Printed Bathroom Cabinet Shelf Finishing Strip

January 12, 2019 thijs Comments 0 Comment

The shelves in my bathroom (mirror) cabinet do have fixed positions. So when trying to put an electric (standing) toothbrush in there, it would not fit. So I just took out a bit of one of the shelves. And this left an ugly front side of the shelf, which needed some solution. First attempt was just using a bit of electric isolation tape; Of course this works fine (a bit shabby, but it’s juts a normally closed cupboard). But as…

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3d, diy, other

SEO Wisdoms

January 9, 2019 thijs Comments 2 comments

Or: how to get your data to be found on the internet… Intro So… at the office we were moving from one web mail/storage system to another (too bad, not getting any better), and we had to go through our old documents to determine what to keep. And in the pile of stuff to check, there was a nice photo of some Search Engine Optimization (SEO) rules which will (probably?) never get old. We did have these rules up on…

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other, search, seo, web

Antique Game Button Setup

January 5, 2019 thijs Comments 0 Comment

Today I was cleaning out an old moving-box, and found a very old small project of mine 😉 It’s a set of game / quiz buttons, which record who did press first. There were only two buttons connected, but the circuit was suitable for 4 of them (two were cut off). There’s no circuit diagrams or software available, it’s just a bunch of images and movies to show the old stuff. It’s a simple setup, you can almost guess the…

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antique, game, nostalgia

Wifi Controlled Alert Light

November 11, 2018 thijs Comments 0 Comment

Intro Now why would I want to create an alert light? 😉 The use case I had in mind was work related; in our team we do monitor a bunch of kubernetes/docker server clusters, a set of software build tools/services, and an oauth secured open-api-gateway. To keep an eye on this during office hours, we have some big dashboard monitors in the room, showing nice graphs and red/green alert boxes. However, sometimes when you are working on something, it takes…

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electronics, esp8266