With EKS using Fargate - how is it setup to know how to scale? What is the default profile of a node in Fargate?

Question

When EKS is setup with Fargate using eksctl --fargate, what is being done there?

How many nodes are being run? What are the values of the node? (memory? cpu?) How does EKS know how to scale when a pod is created? (how does it know how many nodes to run, and the configuration of the nodes?

How can I see the default profile from the command line or web app UI?

These seem like questions anyone would want to ask up front, but on the EKS page/documentation or Fargate, there is no link to information

Answer 1

This page has some of the information you have questions about: https://eksctl.io/usage/fargate-support/

There is always a 1:1 mapping between pods and "nodes" so the number of "nodes" is always the same as the number of pods in an EKS/Fargate only cluster:

Fargate runs each pod in a VM-isolated environment without sharing resources with other pods.

(From: https://docs.aws.amazon.com/eks/latest/userguide/fargate.html)

How can I see the default profile from the command line or web app UI?

Open the EKS console, open your cluster, go to Configuration and then Compute. There you will see your Fargate profiles. Or alternatively use this CLI command.

We document how pods are sized here in the EKS/Fargate docs.