Add ingress.ingressClassName config option

[consideRatio]

Closes #2380 that contains details about the need for this PR.

[consideRatio]

We are quite low on review capacity, so I did a delayed self-review and will go for a merge now that its validated against a k8s 1.22 api-server thanks to #2404

[pebabion]

@consideRatio did you manage to test this? I'm hitting the exact same error.

rpc error: code = Unknown desc = `helm template . --name-template jupyterhub --namespace jupyterhub --kube-version 1.22 --values .jupyterhub/values.yaml --api-versions acme.cert-manager.io/v1 --api-versions acme.cert-manager.io/v1/Challenge --api-versions acme.cert-manager.io/v1/Order --api-versions admissionregistration.k8s.io/v1 --api-versions admissionregistration.k8s.io/v1/MutatingWebhookConfiguration --api-versions admissionregistration.k8s.io/v1/ValidatingWebhookConfiguration --api-versions apiextensions.k8s.io/v1 --api-versions apiextensions.k8s.io/v1/CustomResourceDefinition --api-versions apiregistration.k8s.io/v1 --api-versions apiregistration.k8s.io/v1/APIService --api-versions apps/v1 --api-versions apps/v1/ControllerRevision --api-versions apps/v1/DaemonSet --api-versions apps/v1/Deployment --api-versions apps/v1/ReplicaSet --api-versions apps/v1/StatefulSet --api-versions argoproj.io/v1alpha1 --api-versions argoproj.io/v1alpha1/AppProject --api-versions argoproj.io/v1alpha1/Application --api-versions argoproj.io/v1alpha1/ApplicationSet --api-versions argoproj.io/v1alpha1/ClusterWorkflowTemplate --api-versions argoproj.io/v1alpha1/CronWorkflow --api-versions argoproj.io/v1alpha1/Workflow --api-versions argoproj.io/v1alpha1/WorkflowEventBinding --api-versions argoproj.io/v1alpha1/WorkflowTaskResult --api-versions argoproj.io/v1alpha1/WorkflowTaskSet --api-versions argoproj.io/v1alpha1/WorkflowTemplate --api-versions autoscaling/v1 --api-versions autoscaling/v1/HorizontalPodAutoscaler --api-versions autoscaling/v2beta1 --api-versions autoscaling/v2beta1/HorizontalPodAutoscaler --api-versions autoscaling/v2beta2 --api-versions autoscaling/v2beta2/HorizontalPodAutoscaler --api-versions batch/v1 --api-versions batch/v1/CronJob --api-versions batch/v1/Job --api-versions batch/v1beta1 --api-versions batch/v1beta1/CronJob --api-versions bitnami.com/v1alpha1 --api-versions bitnami.com/v1alpha1/SealedSecret --api-versions cert-manager.io/v1 --api-versions cert-manager.io/v1/Certificate --api-versions cert-manager.io/v1/CertificateRequest --api-versions cert-manager.io/v1/ClusterIssuer --api-versions cert-manager.io/v1/Issuer --api-versions certificates.k8s.io/v1 --api-versions certificates.k8s.io/v1/CertificateSigningRequest --api-versions cilium.io/v2 --api-versions cilium.io/v2/CiliumClusterwideNetworkPolicy --api-versions cilium.io/v2/CiliumEndpoint --api-versions cilium.io/v2/CiliumExternalWorkload --api-versions cilium.io/v2/CiliumIdentity --api-versions cilium.io/v2/CiliumLocalRedirectPolicy --api-versions cilium.io/v2/CiliumNetworkPolicy --api-versions cilium.io/v2/CiliumNode --api-versions cilium.io/v2alpha1 --api-versions cilium.io/v2alpha1/CiliumEgressNATPolicy --api-versions coordination.k8s.io/v1 --api-versions coordination.k8s.io/v1/Lease --api-versions datadoghq.com/v1alpha1 --api-versions datadoghq.com/v1alpha1/DatadogMetric --api-versions discovery.k8s.io/v1 --api-versions discovery.k8s.io/v1/EndpointSlice --api-versions discovery.k8s.io/v1beta1 --api-versions discovery.k8s.io/v1beta1/EndpointSlice --api-versions events.k8s.io/v1 --api-versions events.k8s.io/v1/Event --api-versions events.k8s.io/v1beta1 --api-versions events.k8s.io/v1beta1/Event --api-versions flowcontrol.apiserver.k8s.io/v1beta1 --api-versions flowcontrol.apiserver.k8s.io/v1beta1/FlowSchema --api-versions flowcontrol.apiserver.k8s.io/v1beta1/PriorityLevelConfiguration --api-versions networking.k8s.io/v1 --api-versions networking.k8s.io/v1/Ingress --api-versions networking.k8s.io/v1/IngressClass --api-versions networking.k8s.io/v1/NetworkPolicy --api-versions node.k8s.io/v1 --api-versions node.k8s.io/v1/RuntimeClass --api-versions node.k8s.io/v1beta1 --api-versions node.k8s.io/v1beta1/RuntimeClass --api-versions policy/v1 --api-versions policy/v1/PodDisruptionBudget --api-versions policy/v1beta1 --api-versions policy/v1beta1/PodDisruptionBudget --api-versions policy/v1beta1/PodSecurityPolicy --api-versions rbac.authorization.k8s.io/v1 --api-versions rbac.authorization.k8s.io/v1/ClusterRole --api-versions rbac.authorization.k8s.io/v1/ClusterRoleBinding --api-versions rbac.authorization.k8s.io/v1/Role --api-versions rbac.authorization.k8s.io/v1/RoleBinding --api-versions scheduling.k8s.io/v1 --api-versions scheduling.k8s.io/v1/PriorityClass --api-versions snapshot.storage.k8s.io/v1beta1 --api-versions snapshot.storage.k8s.io/v1beta1/VolumeSnapshot --api-versions snapshot.storage.k8s.io/v1beta1/VolumeSnapshotClass --api-versions snapshot.storage.k8s.io/v1beta1/VolumeSnapshotContent --api-versions storage.k8s.io/v1 --api-versions storage.k8s.io/v1/CSIDriver --api-versions storage.k8s.io/v1/CSINode --api-versions storage.k8s.io/v1/StorageClass --api-versions storage.k8s.io/v1/VolumeAttachment --api-versions storage.k8s.io/v1beta1 --api-versions storage.k8s.io/v1beta1/CSIStorageCapacity --api-versions v1 --api-versions v1/ConfigMap --api-versions v1/Endpoints --api-versions v1/Event --api-versions v1/LimitRange --api-versions v1/Namespace --api-versions v1/Node --api-versions v1/PersistentVolume --api-versions v1/PersistentVolumeClaim --api-versions v1/Pod --api-versions v1/PodTemplate --api-versions v1/ReplicationController --api-versions v1/ResourceQuota --api-versions v1/Secret --api-versions v1/Service --api-versions v1/ServiceAccount --include-crds` failed exit status 1: Error: values don't meet the specifications of the schema(s) in the following chart(s): jupyterhub: - ingress: Additional property ingressClassName is not allowed

[consideRatio]

@pebabion when using what version? This is not yet released with a non-prerelease version so you have to explicitly specify for example --version=2.0.0-beta.1 for now. Working intensively now to get 2.0.0 out

[pebabion]

@consideRatio thanks! I figured that ingressClassName was not available in 1.2.0. Thanks! All the best with the new release!