The Kubernetes network model is typically implemented by an overlay network, which allows pods to have an IP address decoupled from the underlying fabric. IPv4 overlay networks have a number of well-documented drawbacks, which contributes to Kubernetes' reputation as difficult to operate beyond small cluster sizes (~10,000 machines).
This page describes an overlay network based on stateless IPv6 tunnels, which have better reliability and scalability characteristics. It uses IETF protocols that are natively supported by the Linux kernel, and since it is independent of Kubernetes itself can support communcication between processes both inside and outside of containers.
Two years ago I filed Microsoft/vscode#65559 asking for WebAssembly support in VSCode extensions. At the time, WASM was supported by Node.JS but the WebAssembly symbol wasn't available in the extension's evaluation scope. That issue didn't get much activity from upstream but the other day I tried it again, and … it worked!
How to get working cross-compilation from macOS to ARMv7 Linux with either Cargo or Bazel, plus some suggestions for the rustup and rules_rust projects that could make cross-compilation simpler in the future.
Notes on finishing my first large Rust project, a FUSE server implementation. Overall I quite like Rust the language, have mixed feelings about the quality of ancillary tooling, and have strong objections to some decisions made by the packaging system (Cargo + crates.io).
You've heard the euphemism tech debt, where like a car loan you hold a recurring obligation in exchange for immediate liquidity. But this is misleading: bad code is not merely overhead, it also reduces optionality for all teams that come in contact with it. Imagine being unable to get indoor plumbing because your neighbor has a mortgage!
Thus a better analogy for bad code is a haunted forest. Bad code negatively affects everything around it, so engineers will write ad-hoc scripts and shims to protect themselves from direct contact with the bad code. After the authors move to other projects, their hard work will join the forest.
I collect music by buying physical CDs, digitizing them with Exact Audio Copy, and scanning the artwork. This is sometimes challenging if the CD was self-published in a limited run in a foreign country ten years ago. It is very challenging if the CDs have an innate defect that renders some tracks unreadable.
“Plumbing the depths of obsession” – Jeff Atwood
Also see the follow-up post Error Beneath the WAVs for more investigation about what exactly is wrong with my discs, and info about which CD drives are capable of reading them.
This is a follow-up to Why I Ripped The Same CD 300 Times. By the end of that page I'd identified a fragment of audio data that could cause read errors even if it was isolated and burned to a fresh CD. This page explores how specific bit patterns named weak sectors can create corrupt physical media by tickling bad encoding logic in a CD burner.
I also explore dusty archives of the early 2000s game piracy scene, which was very concerned about mitigating weak sectors used as copy protection. With the power of a “two-sheep” LTR-40125S drive, I successfully ripped the original discs with bit-exact audio data and a matching AccurateRip report.
On UNIX-like operating systems, userland processes invoke kernel procedures using syscalls. Each syscall is identified by a unique number and has a short list of parameters, which both can vary betwen operating systems, hardware platforms, and configuration options.
Performing a syscall is usually done via a special assembly instruction, though some platforms use other mechanisms (e.g. a vDSO). This page is a catalog of how to invoke syscalls on different UNIX-like platforms.