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Merge current v2.9 into v3.0

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Tom Moulard 2023-01-09 16:21:45 +01:00
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docs/content/routing/providers/kubernetes-ingress.md
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@ -888,14 +888,20 @@ TLS certificates can be managed in Secrets objects.
### Communication Between Traefik and Pods
!!! info "It is not possible to route requests directly to [Kubernetes services](https://kubernetes.io/docs/concepts/services-networking/service/ "Link to Kubernetes service docs")"
You can use an `ExternalName` service to forward requests to the Kubernetes service through DNS.
For doing so, you have to [allow external name services](https://doc.traefik.io/traefik/providers/kubernetes-ingress/#allowexternalnameservices "Link to docs about allowing external name services").
Traefik automatically requests endpoint information based on the service provided in the ingress spec.
Although Traefik will connect directly to the endpoints (pods),
it still checks the service port to see if TLS communication is required.
There are 3 ways to configure Traefik to use https to communicate with pods:
There are 3 ways to configure Traefik to use HTTPS to communicate with pods:
1. If the service port defined in the ingress spec is `443` (note that you can still use `targetPort` to use a different port on your pod).
1. If the service port defined in the ingress spec has a name that starts with https (such as `https-api`, `https-web` or just `https`).
1. If the service port defined in the ingress spec has a name that starts with `https` (such as `https-api`, `https-web` or just `https`).
1. If the service spec includes the annotation `traefik.ingress.kubernetes.io/service.serversscheme: https`.
If either of those configuration options exist, then the backend communication protocol is assumed to be TLS,