Unable to connect to the server: i/o timeout after Cilium installation

[alifiroozi80]

Is there an existing issue for this?

• I have searched the existing issues

What happened?

Hello there.
I've initialized a bare-metal cluster with kubeadm. I want kube-proxy, and I deploy that as well, and everything is good.
I tried to install Cilium as my CNI only (not a replacement of kube-proxy), and after running the below command:

cilium install --version 1.15.4

After deployment of all Pods, now nothing works and kubectl commands return the below error:

$ kubectl get pod -A
Unable to connect to the server: dial tcp 10.0.7.122:6443: i/o timeout

Even the cilium status command not working.

Cilium Version

$ cilium version --client
cilium-cli: v0.16.5 compiled with go1.22.2 on linux/amd64
cilium image (default): v1.15.4
cilium image (stable): v1.15.4

Kernel Version

$ uname -a
Linux master-1 5.15.0-89-generic #99-Ubuntu SMP Mon Oct 30 20:42:41 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux

Kubernetes Version

1.30.0

Regression

No response

Sysdump

No response

Relevant log output

No response

Anything else?

No response

Cilium Users Document

• Are you a user of Cilium? Please add yourself to the Users doc

Code of Conduct

• I agree to follow this project's Code of Conduct

[youngnick]

Thanks for this issue @alifiroozi80. Did you follow the steps in https://docs.cilium.io/en/stable/installation/k8s-install-kubeadm/ ?

That looks like your kubectl is unable to connect to the apiserver, which could be caused by many issues, not all of them related to Cilium. Without further info, I don't think we will be able to help you, sorry. (And obviously, if you can't connect to the cluster, I understand it will be difficult to collect further info).

I'd suggest starting over following the directions in the docs, and come back here if there are still problems.