Hello again! In this part of the series, we'll finally get our hands dirty using Skaffold to build, push and deploy applications on Kubernetes. We'll deploy a Postgres database on our local Minikube cluster. Along the way, we'll learn Kubernetes concepts such as ConfigMaps, Secrets, Persistent Volumes and Persistent Volume Claims, StatefulSets, and Services.
This is the first part of a series on my journey in learning functional programming (FP). In this first part, I'd like to share why I spend time on learning functional programming in the first place.
In Part 1 of this series, we installed all tools required for developing our Django application on local Kubernetes with Skaffold. In this part, we'll create the Django application. In the next part, we'll finally get to the fun part: defining Kubernetes manifests and Skaffold configuration file.
Containerization has been a revolution in software development. Technologies such as Docker allow developers package their software and all its dependencies in containers runnable in any computing environment, be it your local desktop, public cloud or your company's datacenter. This has drastically accelerated deploying software.
I had two courses in programming at the university, in Java and C. The Java course taught object-oriented programming: objects, classes, inheritance and all that.
Property-based testing is a testing paradigm supporting regular example-based unit tests. In the Pragmatic Programmer book, the authors recommend to use property-based testing for verifying assumptions about their code. It forces you to think about the actual preconditions, postconditions and invariants of your code instead of implicitly coming up with such rules through hard-coded examples.
Optics are a functional programming toolbox for zooming into nested data structures. They are designed for composability, allowing you to create complex operations step-by-step by composing simple components. Optics also never modify their input data structures, ensuring your objects stay nice and immutable.
Static typing is awesome. It helps to detect bugs, acts as in-code documentation and makes development more enjoyable. Recently I've started to use Python's typing module to add static typing to all of my Python projects. Python's typing system may not be as as powerful as one might hope, but I think once you go typed, you don't go back.
fp-ts is a great TypeScript library for functional programming. I haven't found that many real world usage examples out there, so I thought it might be fun to take a repository and try adding fp-ts there. More specifically, I wanted to learn more about making HTTP requests with fp-ts.