Feature: Immutable Nodepools

[Despire]

Motivation

A small change in the nodepool definition will trigger the recreation of the VMs in terraform and can result in a completly new cluster. A small mistake can lead to the destruction of the cluster.

Description

Implement immutability for the nodepools (expect changing the size and autoscaling) to prevent mistakes and force a rolling update by default.

Exit criteria

• Immutable nodepools (expect changing the size and autoscaling)