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Clarify IngressClass selection logic
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This commit is contained in:
Kevin Pollet
GitHub
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1 changed files with 11 additions and 5 deletions
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@ -42,6 +42,12 @@ This provider discovers all Ingresses in the cluster by default, which may lead
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- Configure `watchNamespace` to limit discovery to specific namespaces
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- Use `watchNamespaceSelector` to target Ingresses based on namespace labels
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### IngressClass Selection Logic
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By default, the provider selects all IngressClasses whose `spec.controller` matches `controllerClass` (default: `k8s.io/ingress-nginx`) and picks up every Ingress referencing any of them.
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Setting `ingressClassByName: true` adds a second inclusion path: IngressClasses whose name matches `ingressClass` are also picked up, even if their `spec.controller` does not match `controllerClass`.
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It does not narrow down the controller-based selection — both paths apply independently.
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## Configuration Example
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You can enable the Kubernetes Ingress NGINX provider as detailed below:
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@ -114,8 +120,8 @@ This provider watches for incoming Ingress events and automatically translates N
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## Configuration Options
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<!-- markdownlint-disable MD013 -->
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| Field | Description | Default | Required |
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|:-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|:------------|:--------|:---------|
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| Field | Description | Default | Required |
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|:-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|:-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|:--------|:---------|
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| <a id="opt-providers-providers-ThrottleDuration" href="#opt-providers-providers-ThrottleDuration" title="#opt-providers-providers-ThrottleDuration">`providers.providers`<br/>`ThrottleDuration`</a> | 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 |
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| <a id="opt-providers-kubernetesIngressNGINX-endpoint" href="#opt-providers-kubernetesIngressNGINX-endpoint" title="#opt-providers-kubernetesIngressNGINX-endpoint">`providers.`<br/>`kubernetesIngressNGINX.`<br/>`endpoint`</a> | Server endpoint URL.<br />More information [here](#endpoint). | "" | No |
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| <a id="opt-providers-kubernetesIngressNGINX-token" href="#opt-providers-kubernetesIngressNGINX-token" title="#opt-providers-kubernetesIngressNGINX-token">`providers.`<br/>`kubernetesIngressNGINX.`<br/>`token`</a> | Bearer token used for the Kubernetes client configuration. | "" | No |
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@ -123,11 +129,11 @@ This provider watches for incoming Ingress events and automatically translates N
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| <a id="opt-providers-kubernetesIngressNGINX-throttleDuration" href="#opt-providers-kubernetesIngressNGINX-throttleDuration" title="#opt-providers-kubernetesIngressNGINX-throttleDuration">`providers.`<br/>`kubernetesIngressNGINX.`<br/>`throttleDuration`</a> | 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 |
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| <a id="opt-providers-kubernetesIngressNGINX-watchNamespace" href="#opt-providers-kubernetesIngressNGINX-watchNamespace" title="#opt-providers-kubernetesIngressNGINX-watchNamespace">`providers.`<br/>`kubernetesIngressNGINX.`<br/>`watchNamespace`</a> | Namespace the controller watches for updates to Kubernetes objects. All namespaces are watched if this parameter is left empty. | "" | No |
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| <a id="opt-providers-kubernetesIngressNGINX-watchNamespaceSelector" href="#opt-providers-kubernetesIngressNGINX-watchNamespaceSelector" title="#opt-providers-kubernetesIngressNGINX-watchNamespaceSelector">`providers.`<br/>`kubernetesIngressNGINX.`<br/>`watchNamespaceSelector`</a> | Selector selects namespaces the controller watches for updates to Kubernetes objects. | "" | No |
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| <a id="opt-providers-kubernetesIngressNGINX-ingressClass" href="#opt-providers-kubernetesIngressNGINX-ingressClass" title="#opt-providers-kubernetesIngressNGINX-ingressClass">`providers.`<br/>`kubernetesIngressNGINX.`<br/>`ingressClass`</a> | Name of the ingress class this controller satisfies. | "nginx" | No |
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| <a id="opt-providers-kubernetesIngressNGINX-ingressClass" href="#opt-providers-kubernetesIngressNGINX-ingressClass" title="#opt-providers-kubernetesIngressNGINX-ingressClass">`providers.`<br/>`kubernetesIngressNGINX.`<br/>`ingressClass`</a> | Name of the IngressClass this controller handles. When `ingressClassByName` is `true`, IngressClasses with this name are included in discovery regardless of their `spec.controller` value. | "nginx" | No |
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| <a id="opt-providers-kubernetesIngressNGINX-controllerClass" href="#opt-providers-kubernetesIngressNGINX-controllerClass" title="#opt-providers-kubernetesIngressNGINX-controllerClass">`providers.`<br/>`kubernetesIngressNGINX.`<br/>`controllerClass`</a> | Ingress Class Controller value this controller satisfies. | "" | No |
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| <a id="opt-providers-kubernetesIngressNGINX-watchIngressWithoutClass" href="#opt-providers-kubernetesIngressNGINX-watchIngressWithoutClass" title="#opt-providers-kubernetesIngressNGINX-watchIngressWithoutClass">`providers.`<br/>`kubernetesIngressNGINX.`<br/>`watchIngressWithoutClass`</a> | Define if Ingress Controller should also watch for Ingresses without an IngressClass or the annotation specified. | false | No |
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| <a id="opt-providers-kubernetesIngressNGINX-ingressClassByName" href="#opt-providers-kubernetesIngressNGINX-ingressClassByName" title="#opt-providers-kubernetesIngressNGINX-ingressClassByName">`providers.`<br/>`kubernetesIngressNGINX.`<br/>`ingressClassByName`</a> | Define if Ingress Controller should watch for Ingress Class by Name together with Controller Class. | false | No |
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| <a id="opt-providers-kubernetesIngressNGINX-publishService" href="#opt-providers-kubernetesIngressNGINX-publishService" title="#opt-providers-kubernetesIngressNGINX-publishService">`providers.`<br/>`kubernetesIngressNGINX.`<br/>`publishService`</a> | Service fronting the Ingress controller. Takes the form `namespace/name`. | "" | No |
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| <a id="opt-providers-kubernetesIngressNGINX-ingressClassByName" href="#opt-providers-kubernetesIngressNGINX-ingressClassByName" title="#opt-providers-kubernetesIngressNGINX-ingressClassByName">`providers.`<br/>`kubernetesIngressNGINX.`<br/>`ingressClassByName`</a> | When `true`, any IngressClass whose **name** matches `ingressClass` is include in discovery, even if its `spec.controller` does not match `controllerClass`. This is evaluated alongside the controller-based selection, not instead of it. | false | No |
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| <a id="opt-providers-kubernetesIngressNGINX-publishService" href="#opt-providers-kubernetesIngressNGINX-publishService" title="#opt-providers-kubernetesIngressNGINX-publishService">`providers.`<br/>`kubernetesIngressNGINX.`<br/>`publishService`</a> | Service fronting the Ingress controller. Takes the form `namespace/name`. | "" | No |
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| <a id="opt-providers-kubernetesIngressNGINX-publishStatusAddress" href="#opt-providers-kubernetesIngressNGINX-publishStatusAddress" title="#opt-providers-kubernetesIngressNGINX-publishStatusAddress">`providers.`<br/>`kubernetesIngressNGINX.`<br/>`publishStatusAddress`</a> | Customized address (or addresses, separated by comma) to set as the load-balancer status of Ingress objects this controller satisfies. | "" | No |
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| <a id="opt-providers-kubernetesIngressNGINX-defaultBackendService" href="#opt-providers-kubernetesIngressNGINX-defaultBackendService" title="#opt-providers-kubernetesIngressNGINX-defaultBackendService">`providers.`<br/>`kubernetesIngressNGINX.`<br/>`defaultBackendService`</a> | Service used to serve HTTP requests not matching any known server name (catch-all). Takes the form 'namespace/name'. | "" | No |
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| <a id="opt-providers-kubernetesIngressNGINX-disableSvcExternalName" href="#opt-providers-kubernetesIngressNGINX-disableSvcExternalName" title="#opt-providers-kubernetesIngressNGINX-disableSvcExternalName">`providers.`<br/>`kubernetesIngressNGINX.`<br/>`disableSvcExternalName`</a> | Disable support for Services of type ExternalName. | false | No |
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