description: "Understand the requirements, routing configuration, and how to set up Traefik Proxy as your Kubernetes Ingress Controller. Read the technical documentation."
| `providers.providersThrottleDuration` | Minimum amount of time to wait for, after a configuration reload, before taking into account any new configuration refresh event.<br/>If multiple events occur within this time, only the most recent one is taken into account, and all others are discarded.<br/>**This option cannot be set per provider, but the throttling algorithm applies to each of them independently.** | 2s | No |
| `providers.kubernetesIngress.endpoint` | Server endpoint URL.<br/>More information [here](#endpoint). | "" | No |
| `providers.kubernetesIngress.token` | Bearer token used for the Kubernetes client configuration. | "" | No |
| `providers.kubernetesIngress.certAuthFilePath` | Path to the certificate authority file.<br/>Used for the Kubernetes client configuration. | "" | No |
| `providers.kubernetesCRD.namespaces` | Array of namespaces to watch.<br/>If left empty, watch all namespaces. | | No |
| `providers.kubernetesIngress.labelselector` | Allow filtering on Ingress objects using label selectors.<br/>No effect on Kubernetes `Secrets`, `EndpointSlices` and `Services`.<br/>See [label-selectors](https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/#label-selectors) for details. | "" | No |
| `providers.kubernetesIngress.ingressClass` | The `IngressClass` resource name or the `kubernetes.io/ingress.class` annotation value that identifies resource objects to be processed.<br/>If empty, resources missing the annotation, having an empty value, or the value `traefik` are processed. | "" | No |
| `providers.kubernetesIngress.disableIngressClassLookup` | Prevent to discover IngressClasses in the cluster.<br/>It alleviates the requirement of giving Traefik the rights to look IngressClasses up.<br/>Ignore Ingresses with IngressClass.<br/>Annotations are not affected by this option. | false | No |
| `providers.kubernetesIngress.`<br/>`ingressEndpoint.hostname` | Hostname used for Kubernetes Ingress endpoints. | "" | No |
| `providers.kubernetesIngress.`<br/>`ingressEndpoint.ip` | This IP will get copied to the Ingress `status.loadbalancer.ip`, and currently only supports one IP value (IPv4 or IPv6). | "" | No |
| `providers.kubernetesIngress.`<br/>`ingressEndpoint.publishedService` | The Kubernetes service to copy status from.<br/>When using third parties tools like External-DNS, this option can be used to copy the service `loadbalancer.status` (containing the service's endpoints IPs) to the ingresses. | "" | No |
| `providers.kubernetesIngress.throttleDuration` | Minimum amount of time to wait between two Kubernetes events before producing a new configuration.<br/>This prevents a Kubernetes cluster that updates many times per second from continuously changing your Traefik configuration.<br/>If empty, every event is caught. | 0s | No |
| `providers.kubernetesIngress.allowEmptyServices` | Allows creating a route to reach a service that has no endpoint available.<br/>It allows Traefik to handle the requests and responses targeting this service (applying middleware or observability operations) before returning a `503` HTTP Status. | false | No |
| `providers.kubernetesIngress.allowCrossNamespace` | Allows the `Ingress` to reference resources in namespaces other than theirs. | false | No |
| `providers.kubernetesIngress.allowExternalNameServices` | Allows the `Ingress` to reference ExternalName services. | false | No |
| `providers.kubernetesIngress.nativeLBByDefault` | Allow using the Kubernetes Service load balancing between the pods instead of the one provided by Traefik for every `Ingress` by default.<br/>It can br overridden in the [`ServerTransport`](../../../../routing/services/index.md#serverstransport). | false | No |
| `providers.kubernetesIngress.disableClusterScopeResources` | Prevent from discovering cluster scope resources (`IngressClass` and `Nodes`).<br/>By doing so, it alleviates the requirement of giving Traefik the rights to look up for cluster resources.<br/>Furthermore, Traefik will not handle Ingresses with IngressClass references, therefore such Ingresses will be ignored (please note that annotations are not affected by this option).<br/>This will also prevent from using the `NodePortLB` options on services. | false | No |
<!-- markdownlint-enable MD013 -->
### `endpoint`
The Kubernetes server endpoint URL.
When deployed into Kubernetes, Traefik reads the environment variables `KUBERNETES_SERVICE_HOST`
and `KUBERNETES_SERVICE_PORT` or `KUBECONFIG` to construct the endpoint.
The access token is looked up in `/var/run/secrets/kubernetes.io/serviceaccount/token`
and the SSL CA certificate in `/var/run/secrets/kubernetes.io/serviceaccount/ca.crt`.
Both are mounted automatically when deployed inside Kubernetes.
The endpoint may be specified to override the environment variable values inside
a cluster.
When the environment variables are not found, Traefik tries to connect to the
Kubernetes API server with an external-cluster client.
In this case, the endpoint is required.
Specifically, it may be set to the URL used by `kubectl proxy` to connect to a Kubernetes
cluster using the granted authentication and authorization of the associated kubeconfig.
