Good points I used Nodeport as an external service for Kubernetes, and using MetalLB for load balancing was very helpful, and It was good to be able to easily explain each role and operating principle using a flow chart for the Kubernetes structure, and to create a problem to visually see what each role is. Now I understand what it means for Kubernetes to operate declaratively ^^ Good things to add They say that the status data is centered on the API server.. I wonder if I can visually check this through the API command. It would also be good to be able to see how the status value is stored in etcd (key-value).