Lab 3.2 - Step 11. cannot create token on worker

Hi. Have a problem when creating a token on worker (step 11 Lab 3.2 - Growing the Cluster).
[email protected]:~# sudo kubeadm token list
failed to load admin kubeconfig: open /root/.kube/config: no such file or directory
To see the stack trace of this error execute with --v=5 or higher
[email protected]:~#
Any help is much appreciated.
Comments
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kubeadm token <list,create,...> commands are run on the cp. You can use these tokens in the kubeadm join command on the worker
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Hi Triaris, actually that's the error I have from cp node.
[email protected]:~$ kubeadm token list
failed to list bootstrap tokens: Get "https://k8scp:6443/api/v1/namespaces/kube-system/secrets?fieldSelector=type=bootstrap.kubernetes.io/token": dial tcp 172.31.27.178:6443: connect: connection refused
To see the stack trace of this error execute with --v=5 or higher
[email protected]:~$0 -
Hi @telcomx,
When bootstrapping the cluster, did you follow the video from the introductory chapter, and are you running the recommended VM guest OS and version?
Regards,
-Chris0 -
Hi @chrispokorni
Yes, I am using AWS with two EC2 instances, one as CP (t2.medium) and one WORKER (t2.micro).
Did setup securoty groups as ALL open as per video suggest.
Picture attached.0 -
Hi @telcomx,
The selected t2 sizes may not be sufficient. What OS distribution and version is installed on the EC2s?
Regards,
-Chris0 -
I am using ubuntu-jammy-22.04-amd64-server-20230208 distro.
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0
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so shall i reinstall from scratch or there's an option to make downgrade on aws?
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FYI @chrispokorni
Had to rebuild whole cp and worker as t2.large from scratch using recommended ubuntu and worked. Finally i managed to complete LAB 3.2 Thanks.
[email protected]:~$ sudo kubeadm join --token 0692sx.xjxhhcj7gobtwfs5 k8scp:6443 --discovery-token-ca-cert-hash sha256:05a1165104ec15bafbf51690cb5eb3944b2648af728a077671884e1bd38a2af9
[preflight] Running pre-flight checks
[preflight] Reading configuration from the cluster...
[preflight] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -o yaml'
[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
[kubelet-start] Starting the kubelet
[kubelet-start] Waiting for the kubelet to perform the TLS Bootstrap...This node has joined the cluster:
- Certificate signing request was sent to apiserver and a response was received.
- The Kubelet was informed of the new secure connection details.
Run 'kubectl get nodes' on the control-plane to see this node join the cluster.
[email protected]:~$ kubectl get nodes
The connection to the server localhost:8080 was refused - did you specify the right host or port?
[email protected]:~$
[email protected]:~$
[email protected]:~$
[email protected]:~$ ls -l .kube
ls: cannot access '.kube': No such file or directory
[email protected]:~$
[email protected]:~$
[email protected]:~$0
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