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Ad blocking with Raspberry Pi and Pi-hole
Learn how to use your Raspberry Pi for ad-blocking with Pi-hole and enjoy a distraction-free browsing experience on the Web and other services. Just a simple installation away!
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A Surprise AWS Bill
The tale of the July 4th surprise $2700 AWS bill. It is more nuanced than you think and might have exposed a bug.
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Remote access to production infrastructure (death to the VPN)
A little over a year ago, my employer threw away our VPNs in production and production-like server environments and moved towards a set of new, cutting-edge technologies that make remote access sim…
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AWS’s Share of Amazon’s Profit
I’ve often heard it said that AWS is a major contributor to Amazon’s profitability. How major? Here’s a graph covering the last ten quarters, with a brief methodology discussion:
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Letsencrypt, the Good, the Bad and the Ugly
Letsencrypt is a pretty neat concept: free secure certificates for web servers, in order to increase the adoption of HTTPS across the web. The basic idea is that certificates should be free, that the barrier to install them should be as low as possible and that updating certificates should be automated. It protects…
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This Blog Is Now Running on Solar Power
I've put a solar panel on my balcony, which is connected to a solar charge controller. This device charges an old worn-out car battery and provides power to a Raspberry Pi ~~3b+~~ 4B, which in turn powers this (static) website.
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Don't Use Protobuf for Telemetry
Protobuf needs no introduction, but this post argues that you shouldn’t use it for telemetry. The basic premise of this post is that a good telemetry library needs to be lightweight to avoid perturbing the application; inefficient diagnostic tools are self-defeating. Unlike other formats, nested Protobuf messages…
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Libvirt – The Unsung Hero of Cloud Computing (2013)
Place where I write articles, essays and information on topics which interest me, to share with others
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How to take back control of /etc/resolv.conf on Linux (2018)
Take manual control of your Linux system’s DNS resolution and keep programs from interfering with and overwriting your resolv.conf file.
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Logs, Tails, Long Tails (2013)
Learn the shape of the logs of probability distributions, and you’ll be able to guess how they behave.
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How to stream audio from your phone to your laptop with PulseAudio
This guide describes how to stream audio from your smartphone to your computer over Bluetooth.
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Backing up data like the adult I supposedly am
Like so many things I’m supposed to do but don’t — getting exercise, eating right, sleeping well, standing up for women and minorities in public spaces — backing up my data has always been something I’ve half-assed at best.
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A Nix terminology primer by a newcomer
Maybe I just haven't been paying attention before, but in the last year or so, there seems to have been an increase in discussion around the Nix package manager. This is also what got me to finally try it, and I'm very happy with the results, even if the road is a little bumpy.
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Using GNU Stow to manage your dotfiles (2012)
Adaptation, Algorithms and Ambience
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Talk write-up: How to build a PaaS for 1500 engineers
The technical and organisational decisions behind building a Kubernetes-based platform serving 1500 engineers across Adevinta’s marketplace portfolio.
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Snaps are an anti-pattern on Ubuntu
I congratulate the Linux Mint team for clearly taking a stand against snaps today by removing it from their repository, it was something m...
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Run More Stuff in Docker
In 2020, Docker is the best medium for distributing and running most developer-facing software . It’s widely accepted that Docker is great for building and deploying the artifacts for your enterprise web app, but this is less well known when it comes to things like developer tools. However, running tools in containers…
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Intel Virtualisation: How VT-X, KVM and QEMU Work Together
VT-x is name of CPU virtualisation technology by Intel. KVM is component of Linux kernel which makes use of VT-x. And QEMU is a user-space application which allows users to create virtual machines.…
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Maersk, Me and NotPetya
Maersk is the world’s largest integrated shipping and container logistics company.
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AWS and their billions in IPv4 addresses
Earlier this week, I was doing some work on AWS and wanted to know what IP addresses were being used. Luckily for me, AWS publishes this all here https://ip-ranges.amazonaws.com/ip-ranges.json. When you go through this list, you’ll quickly see that AWS has a massive asset
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Bare-Metal Kubernetes with K3s
Learn how to configure K3s on bare-metal to run a Kubernetes cluster with just as much resilience and fault tolerance as a managed service.
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A deep dive into the official Docker image for Python
The “official” Python Docker image is useful, but to actually understand why, and to use it correctly, it’s worth understanding how exactly it’s constructed.
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AWS Graviton2
In November of last year, AWS announced the first ARM-based AWS instance type ( AWS Designed Processor: Graviton ). For me this was a very big deal because I’ve been talking about ARM based servers for more than a decade, believing that massive client volumes fund the R&D stream that feeds most server-side innovation…
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Microservices Considered Harmful (2019)
A recent trend in our industry is the software architecture move from a monolith app to microservices, often with a related blog post explaining how much better everything is after. A recent blog post by neo-bank Monzo explains that they have reached the crazy amount of 1500 microservices (a ratio of ~10 microservices…
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Gocker: Docker implemented in 1.3k lines of Go
They are popular and they are misunderstood. Containers have become the default way applications are packaged and run on servers, initially popularized by Docker. Now, Docker itself is misunderstoo…