Support loadBalancerClass in Helm chart

[rodrigosandrin]

Proposed changes

Add support to loadBalancerClass in helm chart.

Issue:
#8441

Checklist

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• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

[github-actions]

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[rodrigosandrin]

I have hereby read the F5 CLA and agree to its terms

[rodrigosandrin]

Tests:

value.yaml:

controller:
  service:
    loadBalancerClass: antrea

tested with values

helm install tst1 ./charts/nginx-ingress/ -f value.yaml:

result:

apiVersion: v1
kind: Service
metadata:
  annotations:
    meta.helm.sh/release-name: tst1
    meta.helm.sh/release-namespace: default
  creationTimestamp: "2025-11-20T19:54:06Z"
  labels:
    app.kubernetes.io/instance: tst1
    app.kubernetes.io/managed-by: Helm
    app.kubernetes.io/name: nginx-ingress
    app.kubernetes.io/version: 5.3.0
    helm.sh/chart: nginx-ingress-2.4.0
  name: tst1-nginx-ingress-controller
  namespace: default
  resourceVersion: "887"
  uid: 409c2c3d-3963-43ba-b371-f515de905b2e
spec:
  allocateLoadBalancerNodePorts: true
  clusterIP: 10.96.1.47
  clusterIPs:
  - 10.96.1.47
  externalTrafficPolicy: Local
  healthCheckNodePort: 30169
  internalTrafficPolicy: Cluster
  ipFamilies:
  - IPv4
  ipFamilyPolicy: SingleStack
  loadBalancerClass: antrea
  ports:
  - name: http
    nodePort: 32123
    port: 80
    protocol: TCP
    targetPort: 80
  - name: https
    nodePort: 32391
    port: 443
    protocol: TCP
    targetPort: 443
  selector:
    app.kubernetes.io/instance: tst1
    app.kubernetes.io/name: nginx-ingress
  sessionAffinity: None
  type: LoadBalancer
status:
  loadBalancer: {}

tested with no values:

helm install tst ./charts/nginx-ingress/

result:

apiVersion: v1
kind: Service
metadata:
  annotations:
    meta.helm.sh/release-name: tst
    meta.helm.sh/release-namespace: default
  creationTimestamp: "2025-11-20T19:59:10Z"
  labels:
    app.kubernetes.io/instance: tst
    app.kubernetes.io/managed-by: Helm
    app.kubernetes.io/name: nginx-ingress
    app.kubernetes.io/version: 5.3.0
    helm.sh/chart: nginx-ingress-2.4.0
  name: tst-nginx-ingress-controller
  namespace: default
  resourceVersion: "1486"
  uid: 7658f4e5-a2c4-4fb0-a491-b5b95717c2bd
spec:
  allocateLoadBalancerNodePorts: true
  clusterIP: 10.96.91.8
  clusterIPs:
  - 10.96.91.8
  externalTrafficPolicy: Local
  healthCheckNodePort: 31856
  internalTrafficPolicy: Cluster
  ipFamilies:
  - IPv4
  ipFamilyPolicy: SingleStack
  ports:
  - name: http
    nodePort: 30372
    port: 80
    protocol: TCP
    targetPort: 80
  - name: https
    nodePort: 31787
    port: 443
    protocol: TCP
    targetPort: 443
  selector:
    app.kubernetes.io/instance: tst
    app.kubernetes.io/name: nginx-ingress
  sessionAffinity: None
  type: LoadBalancer
status:
  loadBalancer: {}

[haywoodsh]

the Kubernetes version should align with the other fields in the schema

[haywoodsh]

It would be great if you can include your test results in the helm tests https://github.com/nginx/kubernetes-ingress/blob/main/charts/tests/helmunit_test.go