[Bug] "Error: unknown flag: --drain-nodegroup" when trying to migrate to EKS Auto Mode

[thurahtetaung]

What were you trying to accomplish?

To migrate managed node groups to EKS Auto Mode

What happened?

Running eksctl update auto-mode-config --drain-nodegroup command fails with the following error:

Error: unknown flag: --drain-nodegroup

How to reproduce it?

Follow this guide after enabling auto-mode in aws console

Logs

Error: unknown flag: --drain-nodegroup

Versions

$ eksctl info: 

eksctl version: 0.196.0
kubectl version: v1.30.2
OS: linux

[github-actions]

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[jatin-mehrotra-colorkrew]

The documentation is wrong https://docs.aws.amazon.com/eks/latest/userguide/auto-migrate-mng.html

As per command line help

The command is eksctl update auto-mode-config --drain-all-nodegroups ..... However it wont still work because it needs cluster-config file and this does not make sense for cluster which are create during console or terraform to produce cluster-config file.

Even if I generate cluster-config file by hit and trial I only see this message

2024-12-03 01:38:59 [ℹ] Auto Mode is already enabled and up-to-date

I have mentioned this bug in my blog too https://dev.to/aws-builders/run-kubernetes-like-a-pro-without-the-expertise-introducing-eks-auto-mode-5edf

[cPu1]

The flag to drain nodegroups after updating a cluster to use Auto Mode is --drain-all-nodegroups. We'll update the documentation.

Even if I generate cluster-config file by hit and trial I only see this message

--drain-all-nodegroups is only valid when the cluster does not already have Auto Mode enabled. To drain your existing nodegroups, use eksctl drain nodegroup.