Fedora 37
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Kubernetes : Configure Worker Node2022/11/22

Install Kubeadm to Configure Multi Nodes Kubernetes Cluster.
This example is based on the environment like follows.
           |                           |                          |
       eth0|              eth0|             eth0|
+----------+-----------+   +-----------+----------+   +-----------+----------+
|   [ dlp.srv.world ]  |   | [ node01.srv.world ] |   | [ node02.srv.world ] |
|     Control Plane    |   |      Worker Node     |   |      Worker Node     |
+----------------------+   +----------------------+   +----------------------+

[2] Join in Kubernetes Cluster which is initialized on Control Plane Node.
The command for joining is just the one [kubeadm join ***] which was shown on the bottom of the results on initial setup of Cluster.
[root@node01 ~]#
kubeadm join --token 2i0pks.r5lkvs55ezi792kl \
--discovery-token-ca-cert-hash sha256:6847590e54931d188e6a7b3fbda35ab7e8c1ca8fa915cdd377c44cfc0a027e1a

[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.

# OK if [This node has joined the cluster]

[3] Verify Status on Control Plane Node. That's Ok if all STATUS are Ready.
[root@dlp ~]#
kubectl get nodes

NAME               STATUS   ROLES           AGE   VERSION
dlp.srv.world      Ready    control-plane   23m   v1.25.3
node01.srv.world   Ready    <none>          71s   v1.25.3
node02.srv.world   Ready    <none>          23s   v1.25.3
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