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K8s with 1M nodes
This is an effort to create a fully functional Kubernetes cluster with 1 million active nodes.
New
The latest blog posts to take off on Hacker News. 321 posts.
92
Are hard drives getting better?
After 13 years, the data is clear—the bathtub curve does not apply to hard drives. And, more importantly, hard drives are failing less and lasting longer.
93
Leaving serverless led to performance improvement and a simplified architecture
Every millisecond matters when you're in the critical path of API authentication. After two years of fighting serverless limitations, we rebuilt our entire API stack and slashed the end-to-end latency.
94
Unpacking Cloudflare Workers CPU Performance Benchmarks
Cloudflare investigated CPU performance benchmark results for Workers, uncovering and fixing issues in infrastructure, V8 garbage collection, and OpenNext optimizations. These improvements have made Cloudflare Workers faster for all customers.
95
Why did containers happen?
Autumn update This is what it is looking like around here at the moment. DevOpsDays London I gave a talk at DevOpsDays London recently. It was a nice...
96
A Guide for WireGuard VPN Setup with Pi-Hole Adblock and Unbound DNS
I’ve used Mullvad as my VPN provider for a few years. Their service is good, they provide keys for 5 devices, rely on the Wireguard protocol, and offer alternative configurations as well. Despite that, my needs have changed and I wanted to be able to have granular control over DNS queries and the ability to connect my…
97
Does our “need for speed” make our wi-fi suck?
It is common knowledge among Wi-Fi professionals that using 20 MHz or 40 MHz channel widths when planning 5 GHz networks offers the best overall ex
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Rubygems.org AWS Root Access Event – September 2025
As part of standard incident-response practice, Ruby Central is publishing the following post-incident review to the public. This document summarizes the September 2025 AWS root-access event, what occurred, what we verified, and the actions we’ve taken to strengthen our security processes.
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Why Self-Host?
Let me make the argument why you should start self-hosting more of your personal services.
100
Why is everything so scalable?
I’m entirely convinced that basically every developer alive today heard the adage “dress for the job you want, not the job you have” and figured that, since they always wear jeans and a t-shirt anyway, they might as well apply it to their systems’ architecture. This explains why the stack of every single company I’ve…
101
Scaling request logging with ClickHouse, Kafka, and Vector
How we solved request logging at scale by moving from MariaDB to ClickHouse, Kafka, and Vector after our deprecated database engine couldn't keep up with billions of monthly requests.
102
Putting a dumb weather station on the internet
After all, why not? Why shouldn't I put a dumb Temu weather station on the Internet?
103
More random home lab things I've recently learned
From my series of "Christian's Home Lab adventures", here's some more things I've recently learned / discovered and figured are worth sharing: NVMe SSDs on a Raspberry PI, ARM64 adventures, more zfs troubles, and some cool tools you should try.
104
Uv overtakes pip in CI
An opportunity for more opinionated defaults
105
Modern messaging: Running your own XMPP server
Since a years we know, or might suspect, our chats are listend on, our uploaded files are sold for advertising or what purpose ever and the chance our social messengers leak our private data is incredibly high. It is about time to work against this.
106
Testing two 18 TB white label SATA hard drives from datablocks.dev
It has been 0 days since the last change to my home server.
107
Beginner Guide to VPS Hetzner and Coolify
I set up my own VPS, documented every step, and ended up with a repeatable deployment pipeline. This is both a checklist for my future self and a guide for a...
108
Self hosting 10TB in S3 on a framework laptop and disks
About 5 months ago I made the decision to start self hosting my own S3 . I was working on AppGoblin’s SDK tracking of the top 100k Android and iOS apps so was wanting a lot of space, but for cheap.
109
Self-hosting email like it's 1984
Notes from setting up a truly minimal self-hosted email server with Postfix and OpenDKIM. Covers TLS, SPF, DKIM, DMARC, DNS, reverse DNS, multiple domains, and delivering to Gmail.
110
WireGuard topologies for self-hosting at home
I recently migrated my self-hosted services from a VPS (virtual private server) at a remote data center to a physical server at home. This change was motivated by wanting to be in control of the hardware and network where said services run, while trying to keep things as simple as possible. What follows is a…
111
Litestream v0.5.0
Same Litestream goodness but better, faster, stronger
112
Building the heap: racking 30 petabytes of hard drives for pretraining
We built the heap, a 30 petabyte data storage cluster in downtown San Francisco, and spent under $500,000.
113
Intelligent Kubernetes Load Balancing at Databricks
How Databricks uses client-side load balancing to improve gRPC traffic, reduce tail latency, and handle ingress with real-time service discovery.
114
LLM Observability in the Wild – Why OpenTelemetry Should Be the Standard
LLM Observability breaks in wild today as new libraries like OpenInference don't adhere to OpenTelemetry standards leading to silos and suboptimal performance for users who want to tie LLM observability with rest of their observability stack
115
Cloudflare Email Service: private beta
Today, we’re launching Cloudflare Email Service. Send and receive email directly from your Workers with native bindings—no API keys needed. We're unifying email sending and routing into a single service built for developers. Sign up for the private beta.
116
Traefik's 10-year anniversary
10 years ago, I made a small reverse proxy project public. Fast forward to today and Traefik has 3.4B downloads and 56k GitHub stars. See how it unfolded.
117
Podman Desktop celebrates 3M downloads
We reached 3,000,000 Downloads of Podman Desktop. Let's celebrate.
118
Systemd can be a cause of restrictions on daemons
You're probably reading this page because you've attempted to access some part of my blog (Wandering Thoughts) or CSpace , the wiki thing it's part of. Unfortunately you're using a browser version that my anti-crawler precautions consider suspicious, most often because it's too old (most often this applies to versions…
119
Node 20 will be deprecated on GitHub Actions runners
Editor’s note (August 25, 2026): Updated the Node20 removal date to September 23rd, 2026. Editor’s note (February 25, 2026): Updated the migration date to June of 2026. Editor’s note (May…
120
OpenTelemetry collector: What it is, when you need it, and when you don't
A practical, no-fluff guide to understanding the OpenTelemetry Collector - what it does, how it works, real architecture patterns (with and without it).