Articles

This blog post is a collection of my personal notes on networking. For a long time, I had to jump between different notebooks to connect concepts; from core networking theory, to Linux internals, all the way up to Kubernetes and CNI. This post is my attempt to combine all those notes into a single, logical document. We’ll follow a step-by-step path. We’ll start with fundamental network concepts, then see how those are implemented in Linux, which is the foundation for most modern virtual networking. Finally, we’ll see how Kubernetes builds on top of it all. ...

I’ve always found the best way to learn something is to try and write it down. This post is the result of that process, a collection of my personal notes (zettelkasten) aimed at connecting the dots between three fundamental concepts in Linux: inodes, file descriptors, and sockets. So, this post is just a cleaned-up version of my personal notes, explaining how inodes (representing files on disk), file descriptors (used by programs), and sockets (for network communication) all fit together. ...

Kubernetes Client-Side Indexing This post is part of Kubernetes controller development. Check out the first part on Diving into controller-runtime | Manager if you are interested in controller-runtime. When working with Kubernetes Operators, read requests (get and list) to the Kubernetes API server are handled by an in-memory cache that is maintained by client-go to reduce the load on your API server. This cache can be enhanced with indexes to retrieve resources more efficiently. ...

A thread pool is a software design pattern where a set of worker threads is created to execute tasks concurrently. Instead of creating a new thread for each task, which can be resource-intensive, tasks are submitted to the pool and executed by available worker threads. This blog post will go through a simple thread pool implementation - similar to the one in Rust book - with a couple of simple enhancements. ...

Working with Custom Data Format in Rust using serde If you need to perform serialization or deserialization in Rust, you’ve most likely used the serde before. I’m currently learning Rust, and I found myself needing similar thing. To get familiar with the Rust ecosystem, I decided to develop a simple key-value store. Initially, the engine for this key-value store was designed to work with JSON objects, as JSON is a widely-used format that’s straightforward to use with web clients. Also, as most of the languages and platforms already support JSON, it is a good choice to start with. ...