Egor Urvanov

Kubernetes

Specs and architecture · K8s

A system that runs programs in containers across many servers and watches over them. It is configured declaratively: a file describes the desired state, such as “three copies of the booking service”, and controllers in a reconcile loop compare it with the actual state and fix the difference: a copy crashes, a new one is started.

desiredreplicas: 3controllercompares in a loop×actual: 2 of 3the crashed copy is restarteddifference → fix● model, people, systems, data  ● agent and harness  ● risk, stop, boundaryThe desired state says three copies. The controller compares it with the actual state and restarts the crashed copy

Source: Kubernetes: declarative management of objects

Read more: A reconcile loop for specs: like Kubernetes

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