DO IT IN CODE (NOT YAML)! Fedor Korotkov Viktor Gamov @fedor - PowerPoint PPT Presentation

DO IT IN CODE (NOT YAML)! Fedor Korotkov Viktor Gamov @fedor @gamussa Copenhagen Denmark

MEME REVIEW Sarcastic View on Existential Problems with YAML

bash ??? YAML

A BIT MORE SERIOUS NOW Sarcastic View on the Real Problems with YAML

WHY YAML IN THE FIRST PLACE ● Initial Release in 2001 ● Originally Yet Another Markup Language ● Repurposed as YAML Ain't Markup Language ● From Wiki: “commonly used for configuration files” ● End goal is to declare something ● YAML is not going anywhere any time soon

YAML IS TYPELESS

THERE IS A SCHEMA THOUGH json-schema.org

INTELLIJ SUPPORTS JSON SCHEMAS FOR YAML

YAML IS GREAT but for small things

EVOLUTION OF YAML IN A COMPANY KOTLIN HELM DSL ANSIBLE YAML YAML SCRIPTS NO YAML

KUBERNETES Photo caption

KUBERNETES ARCHITECTURE Actually JSON image source: Janakiram MSV

THINGS TO THINK ABOUT YAML FOR K8S AT SCALE ● How to avoid copy-pasting? ● How to provide primitives? ● How to allow customization for teams? ● How to test incremental changes? ● Some tools to analyze current state of clusters

INGRESS EXAMPLE

KOTLIN DSL FOR KUBERNETES github.com/fkorotkov/k8s-kotlin-dsl

HOW IT WORKS

DSL GENERATION ● Generates DSLs from fabric8 types ● Generates fabric8 types from deployed CRDs 😆

Confluent Operator Architecture

KOTLIN POWER: BUILDERS

KOTLIN POWER: BUILDERS

KOTLIN POWER: EXTENSION FUNCTIONS

KOTLIN POWER: EXTENSION FUNCTIONS

USE CASES

DEMO

THANK YOU AND REMEMBER TO VOTE Fedor Korotkov @fedor Viktor Gamov @gamussa #KotlinConf