Java Operator SDK Demo for JavaDay Istanbul 2023

Demo for the Developing Kubernetes Operators with Java Operator SDK talk in JavaDay Istanbul 2023

Architecture

Examining the Operator

• Examine the application.properties
• Examine the target/kubernetes
• Examine the custom resources and their specs
• Examine the reconcilers
• Examine the services

Rough Steps

Make sure a K8S instance is running on your local.

Run the operator on your local.

Then run the following commands one by one:

k get pods -w

k apply -f examples/readyPlayerOne/oasis.yaml 

k get games

k get games oasis -o yaml

k exec -it oasis-postgres-956694c99-7gnhc -- bash

psql -U postgres

\c

\dt

k apply -f examples/readyPlayerOne/incipio.yaml

\dt

select * from world;

k apply -f examples/readyPlayerOne/

select * from world;

k delete games oasis

Running the test

• Examine the OperatorFunctionalTest
• Run the test