[Bug] Can't disable default addons with auto mode

[artem-nefedov]

What were you trying to accomplish?

Create a cluster with auto mode enabled and with default addons (metrics-server) disabled.

What happened?

eksctl throws a confusing error (no mention of problematic section). Removing addonsConfig makes the creation run successfully.

How to reproduce it?

Run eksctl create cluster with config containing the following sections:

addonsConfig:
  disableDefaultAddons: true

autoModeConfig:
  enabled: true
  nodeRoleARN: arn:...<redacted>
  nodePools: [system] 

iam:
  withOIDC: true
  serviceAccounts:
   ... # non-empty list required for the problem to trigger

Logs

Error: fields nodeGroups, managedNodeGroups, fargateProfiles, karpenter, gitops, iam.serviceAccounts, and iam.podIdentityAssociations are not supported during cluster creation in a cluster without VPC CNI; please remove these fields and add them back after cluster creation is successful

Anything else we need to know?

Versions

eksctl 0.202.0