kubeadm join worker node to controlplane pre-flight checks

leegekkhim

Received this error when running sudo kubeadm join command on worker node

[preflight] Running pre-flight checks
error execution phase preflight: couldn't validate the identity of the API Server: Get "https://172.31.47.199:6443/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

chrispokorni

Hi @leegekkhim,

What infrastructure is hosting your cluster? What cloud or what local hypervisor is used? What is the guest OS? Are all firewalls disabled per the instructions from the intro chapter demo videos?

Please provide the entire join command and all output it produced.

Regards,
-Chris