Expose a Docker Compose App with a Secure Cloudflare Tunnel

Expose a Docker Compose application through an outbound-only Cloudflare Tunnel, without publishing host ports or managing a reverse proxy and TLS certificates.

Chrome Extension Development: Fetch non CORS URLs in v3

Testing whether a URL exists on GitHub by delegating fetch to a service worker.

App definitions from Mesos/Marathon to CSV

We’re currently in the business of moving from Mesos/Marathon to Kubernetes. As we have a microservices environment we can move service by service. We have multiple clusters running, so I need to track which teams have which services (still) running on Mesos/Marathon.

Let’s see if we can lift the data out of the system using the Marathon API, JQ and cURL.

Bash Script with a Library for Named Arguments

Move reusable Bash named-argument parsing into a sourced library while keeping validation and supported options under the caller’s control.

Grafana, I want slugs back for my Hubot! 😭

At Wehkamp, we use the Hubot Grafana project to make our Grafana dashboard available in Slack. It mainly helps our standby team to make quick assessments on what’s going on with our website. Last year, we saw we could not upgrade the package from 2.5.2 to 3.0.1, because slugs could not be used anymore. But we use slugs and… quite heavily! So we did not upgrade our Grafana v7… until we got hit by the input field bug. We decided to see what we could do to bring our slug feature back to our ChatOps bot!

My Prettier Settings

I use Prettier to reduce visual noise and make the CSS, HTML, JavaScript, and TypeScript examples on this blog easier to read. Here is my configuration and the reasoning behind each setting.

DevOps Days Eindhoven Talk: How To Handle The Immense Traffic of a Successful Influencer Campaign

Anneke Keller (CTO), Koen Roumen (Head of Platfom) and me did a talk on DevOpsDays Eindhoven 2022: A true story on how we learned how to handle the immense web traffic caused by a successful influencer campaign. How we built a platform with Karpenter and Keda for rapid and massive auto-scaling and the effects this had on our platform.

Handlebars.Net: Fun with [Flags]

When working on a project, the need arose for better handling of enums decorated with a [Flags] attribute. In a previous article we explored how to use Handlebars.NET to generate JSON strings. In this article we’ll build further on that generator to add support for enums. We will also move away from the static JsonHandlebarsDotNet to an injectable version.

Handlebars.Net & JSON templates

I ❤️ Handlebars! So I was very very very happy to see that Handlebars was ported to .NET! It is a mega flexible templating engine as it can easily be extended. I’m currently working on a project where a I need to parse objects via JSON templates to JSON strings. This blog will show how to instruct Handlebars to parse into JSON and add some nice error messages if your template fails.

Connect Ikea TRÅDFRI with KlikAanKlikUit (ICS-2000 / KAKU)

Let’s connect some Ikea TRÅDFRI bulbs to your KAKU ICS-2000. Adding them is not so easy, as the manuals just did not work.