TL;DR

The Docker BuildKit buildx CLI plugin simplifies building Docker images for different OS/CPU platforms (e.g. linux/amd64, linux/arm64, linux/arm, windows/amd64)

So why is it a big deal now? Who needs Docker images for Arm platform anyway. Raspberry Pi geeks?

A good reason for this is just a one word Graviton2…

Kubernetes configuration as Code

Complex Kubernetes application consists from multiple Kubernetes resources, defined in YAML files. Authoring a properly formatted YAML files that are also a valid Kubernetes specification, that should also comply to some policy can be a challenging task.

These YAML files are your application deployment and configuration code and should be addressed as code.

As with code, Continuous Integration approach should be applied to a Kubernetes configuration files.