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Still unable to connect worker node to cp node

When I execute the "sudo kubeadm join" command on the worker node, I get the following:

[preflight] Running pre-flight checks
error execution phase preflight: couldn't validate the identity of the API Server: Get "https:///api/v1/namespaces/kube-public/configmaps/cluster-info?timeout=10s": net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
To see the stack trace of this error execute with --v=5 or higher


  • taepyongyang
    taepyongyang Posts: 7
    edited November 2022

    I've performed over a dozen times (with 11.08/11.23) as I'm using a temporary Cloud (GCP) lab on Ubuntu 20.04 LTS.

    Did this occur while using the kubeadm join verbatim?

    grep -A2 join cp.out

    sudo kubeadm join <VPC ASSIGNED_IP_OF_CP>:6443 --token <PRINTED_TOKEN> \
        --discovery-token-ca-cert-hash sha256:<MORE_PRINTED_TOKEN>
  • Hi @tstaffordsmith,

    What type of infrastructure are you on? It seems there is a timeout, that could be caused by a misconfigured firewall. Are you on cloud or local VMs? What OS version, CPU, RAM?


  • Already figured this out but thank you


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