Is it possible from inside the cluster to figure o...
# k3sq
quick-dentist-45681
03/21/2025, 3:27 PMIs it possible from inside the cluster to figure out the "advertised" URL to the API server, such as the one you would put in your kubeconfig file?
n
numerous-animal-44937
03/21/2025, 4:45 PMyou can find some more information via
kubectl cluster-info --v=7numerous-animal-44937
03/21/2025, 4:46 PMalso if you have access to the control plane machine you can check if you have something specified on the k3s server at the service
cat ./etc/systemd/system/k3s.serviceq
quaint-lawyer-37988
03/21/2025, 4:53 PMThanks a lot
👍 1
c
creamy-pencil-82913
03/21/2025, 5:46 PMkubectl get endpoints kubernetescreamy-pencil-82913
03/21/2025, 5:46 PMany one of those apiserver endpoints…
q
quick-dentist-45681
03/21/2025, 6:32 PMLooking at my endpoints I only get the internal IP. My server has multiple interfaces and the api-server binds to 0.0.0.0, so the VPN IP also works, but that's not visible on the endpoint.
quick-dentist-45681
03/21/2025, 6:35 PMThe cluster-info seems dependent on your kubeconfig? Looking at the original config used when installing k3s obviously contains the information, I was more looking for ways to discover it from inside the cluster.
quick-dentist-45681
03/21/2025, 6:39 PMThe idea was to have an application in the cluster, and when a user calls an endpoint with proper authentication, a valid kubeconfig is returned. But for that I need the advertised URL. I was hoping it was discoverable somewhere, but I guess I'll just have to supply it as config.
c
creamy-pencil-82913
03/21/2025, 6:51 PMapiservers advertise the internal IP of the node they are running on, as the endpoints are used to provide in-cluster connectivity. If you want to connect to the cluster from outside then you will need to know on your own how reach your nodes from outside the cluster. that is not something Kubernetes is aware of.
👍 1
s
sticky-summer-13450
03/24/2025, 10:57 AMBecause I like to play-along at home, I thought I'd try that on my non-ha k3s cluster.kubectl get endpoints kubernetes
Copy code
$ kubectl get endpoints kubernetes --context=kube001
Error from server (NotFound): endpoints "kubernetes" not foundq
quick-dentist-45681
03/24/2025, 11:15 AMAre you sure you checked the
defaultkubernetesc
creamy-pencil-82913
03/24/2025, 5:37 PMyes you will always have that. It will always exist in the default namespace.
s
sticky-summer-13450
03/25/2025, 9:22 AMAh yes -
kubectl get endpoints -n=default2 Views