Ability to update existing eks cluster via config file

[haofeif]

What feature/behavior/change do you want?

• I want eksctl to support eksctl apply -f config-file.yaml. Now it only supports create and delete.

Why do you want this feature?

• I am using config file as the source of truth to deploy my eks cluster via eksctl, which is superb convenient, just like how i deploy my Kubernetes manifest or AWS CloudFormation. I found out that (correct me if I am wrong) once i create the EKS cluster via eksctl, I cannot make changes to the config file and deploy the changes.
• i.e. I want to add additional fields to "addons", or I want to change the instance types of my nodes.
  I only found eksctl create cluster and eksctl delete cluster. I tried eksctl upgrade cluster but it does not apply the changes that I need.
  That is why I am proposing to have something like eksctl apply function just like how kubectl does.
• Note: I am using the latest eksctl version 0.77.0

[cPu1]

Hey @haofeif, we already have an issue open for such a feature: #2774

I'm closing this as a duplicate. Please feel free to open a new issue if you have any more feature requests or questions.