KubeCon + CloudNativeCon Europe 2020

While using Kubernetes, the need to automate our work is everpresent. Usually, the task boils to a simple pattern: subscribe to Kubernetes resource changes and acting upon them. In the simplest case, a ConfigMap creation will suffice. In the complex one, interaction with a Custom Resource might be required.

Most of the operations engineers know a scripting language (e.g., bash) and are familiar with the jq tool, which employs an indigenous paradigm of traversing JSON structures inspired by the functional programming paradigm.

A general-purpose programming language, without a doubt, provides tons of benefits, but do they not create a steep learning curve on the path to automating and extending Kubernetes?

This talk focuses on writing simple operators with the shell-operator, using a scripting language (bash) and jq, and justifies such an approach.