Scale up or down number of machines, machine type in a cluster
The machine type and number of machines should be editable within a cluster, without deleting and recreating the cluster.
If a service is given a static IP address, that static ip should be retainable after making changes to the hardware in that cluster.
Mani Gandham commented
This is possible now by using node pools (create new node pool and delete the old one). Kubernetes should transfer all the workloads without downtime.
I would love to see this, especially the machine type. Sometimes you just chose the wrong machine type and creating a complete new cluster is to much work. Although changing the number of machines is already possible trough a resize: https://cloud.google.com/container-engine/docs/resize-cluster