In a previous blog post, project go4vl was introduced and discussed as a way to use Go to interact with low level device drivers to capture video frames on a Linux machine. This post looks at how to use the go4vl project to build a functional a webcam. See project…

When working with cluster components, or building custom resources, that are deployed in Kubernetes, it is often necessary to run full end-to-end tests to ensure all aspects of your solutions work as intended. Project e2e-framework sigs.k8s.io/e2e-framework Project e2e-framework, from Kubernetes-SIGs, makes it easy to create and run end-to-end tests using…

Using Go and the Video for Linux (V4L2) API to stream videos from camera hardware natively without using CGo. — This write up explores how to access video device drivers using the Video for Linux API (or V4L2) and the Go standard libraries, with no Cgo, to build realtime video capture and streaming programs. How this got started As with many endeavors in 2020, this got started because of COVID, specifically due to the…

When encoding binary data for IO in Go, there is a multitude of options available ranging from gob, Protobuf, to roll-your-own encoder. This post examines Go’s encoding/Binary package used to encode and decode numeric values into binary data that can be used for many purposes. A simple binary protocol Imagine that you are writing…

The world of Go and Kubernetes move really fast. Just a year ago, I published a story about using Go dep to organize package dependencies for Kubernetes API client projects. A year later, Go dependency management has taken a another major leap forward with the introduction of Go modules. This…

At KubeCon EU 2018, I had the opportunity to do a presentation on the use of protocol buffers and gRPC for efficient IoT. …

This is part 4 of a multipart series which covers the programmability of the Kubernetes API using the official clients. …