[jupdec]

Description

Add elasticLoadBalancing to kubernetesNetworkConfig to support Gateway API opt in for Auto Mode LBC

Testing -

1. created cluster elb-pr8909 successfully

2026-10-27 04:19:52 [ℹ]  using Kubernetes version 1.37
2026-10-27 04:19:52 [ℹ]  creating EKS cluster "elb-pr8909" in "us-west-2" region with 
2026-10-27 04:19:52 [ℹ]  if you encounter any issues, check CloudFormation console or try 'eksctl utils describe-stacks --region=us-west-2 --cluster=elb-pr8909'
2026-10-27 04:19:52 [ℹ]  Kubernetes API endpoint access will use default of {publicAccess=true, privateAccess=false} for cluster "elb-pr8909" in "us-west-2"
2026-10-27 04:19:52 [ℹ]  CloudWatch logging will not be enabled for cluster "elb-pr8909" in "us-west-2"
2026-10-27 04:19:52 [ℹ]  you can enable it with 'eksctl utils update-cluster-logging --enable-types={SPECIFY-YOUR-LOG-TYPES-HERE (e.g. all)} --region=us-west-2 --cluster=elb-pr8909'
2026-10-27 04:19:52 [ℹ]  default addons metrics-server were not specified, will install them as EKS addons
2026-10-27 04:19:52 [ℹ]  
..
2026-10-27 04:32:54 [ℹ]  no tasks
2026-10-27 04:32:54 [✔]  all EKS cluster resources for "elb-pr8909" have been created
2026-10-27 04:32:54 [ℹ]  creating addon: metrics-server
2026-10-27 04:32:54 [ℹ]  successfully created addon: metrics-server
2026-10-27 04:32:55 [ℹ]  kubectl command should work with "/home/kaposmee/.kube/config", try 'kubectl get nodes'
2026-10-27 04:32:55 [✔]  EKS cluster "elb-pr8909" in "us-west-2" region is ready
rc=0

aws eks describe-cluster --region us-west-2 --name elb-pr8909 --debug 2>&1 \
  | grep -m1 'Response body' -A2 | grep -o '"elasticLoadBalancing.\{0,120\}'
# "elasticLoadBalancing" : { "enabled" : true, "gatewayApi" : { "crds" : { "managed" : true ...

2. Add IT tests pass successfully

ok  	github.com/weaveworks/eksctl/pkg/apis/eksctl.io/v1alpha5	0.245s
?   	github.com/weaveworks/eksctl/pkg/apis/eksctl.io/v1alpha5/fakes	[no test files]
ok  	github.com/weaveworks/eksctl/pkg/cfn/builder	0.436s
?   	github.com/weaveworks/eksctl/pkg/cfn/builder/fakes	[no test files]
ok  	github.com/weaveworks/eksctl/pkg/actions/automode	0.076s
?   	github.com/weaveworks/eksctl/pkg/actions/automode/mocks	[no test files]
ok  	github.com/weaveworks/eksctl/pkg/ctl/utils	0.058s
?   	github.com/weaveworks/eksctl/pkg/ctl/utils/mocks	[no test files]
ok  	github.com/weaveworks/eksctl/pkg/ctl/cmdutils	0.123s
ok  	github.com/weaveworks/eksctl/pkg/ctl/cmdutils/filter	0.039s
?   	github.com/weaveworks/eksctl/pkg/ctl/cmdutils/filter/fakes	[no test files]
?   	github.com/weaveworks/eksctl/pkg/ctl/cmdutils/filter/filterfakes	[no test files]

created a dev cluster

Checklist

• Added tests that cover your change (if possible)
• Added/modified documentation as required (such as the README.md, or the userdocs directory)
• Manually tested
• Made sure the title of the PR is a good description that can go into the release notes
• (Core team) Added labels for change area (e.g. area/nodegroup) and kind (e.g. kind/improvement)

BONUS POINTS checklist: complete for good vibes and maybe prizes?! 🤯

• Backfilled missing tests for code in same general area 🎉
• Refactored something and made the world a better place 🌟

[github-actions]

Hello jupdec 👋 Thank you for opening a Pull Request in eksctl project. The team will review the Pull Request and aim to respond within 1-10 business days. Meanwhile, please read about the Contribution and Code of Conduct guidelines here. You can find out more information about eksctl on our website

[zac-nixon]

You can drop this :)