I tried different implentations of Kubernetes and realized that master node requires approximately 2GB RAM with 2 CPU cores and worker node 700MB with 1 core. Each component of k8s seems to be not so heavy-loaded, but it still requires a lot of resources.
What is a bottleneck and is it configurable?
Have you tried Lightweight Kubernetes K3S
K3s cluster to run in a single-node configuration can run with 1 CPU and 512MB RAM
Hardware requirements scale based on the size of your deployments. Minimum recommendations are outlined here.
RAM: 512MB Minimum
CPU: 1 MinimumIf k3s can do it so for sure the resources look configurable to use lower values.