Kubernetes : Configure Worker Node2025/11/21 |
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Install Kubeadm to Configure Multi Nodes Kubernetes Cluster. This example is based on the environment like follows.
-----------+---------------------------+--------------------------+------------
| | |
eth0|10.0.0.30 eth0|10.0.0.51 eth0|10.0.0.52
+----------+-----------+ +-----------+----------+ +-----------+----------+
| [ dlp.srv.world ] | | [ node01.srv.world ] | | [ node02.srv.world ] |
| Control Plane | | Worker Node | | Worker Node |
+----------------------+ +----------------------+ +----------------------+
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| [1] | |
| [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. |
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[root@node01 ~]# kubeadm join 10.0.0.30:6443 --token abcdef.0123456789abcdef \ --discovery-token-ca-cert-hash sha256:a0eb7372844a5bf0d31ea23cc30dc27c81fb1e3ce772c49107abbf3a81ecb421 [preflight] Running pre-flight checks [preflight] Reading configuration from the "kubeadm-config" ConfigMap in namespace "kube-system"... [preflight] Use 'kubeadm init phase upload-config kubeadm --config your-config-file' to re-upload it. [kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/instance-config.yaml" [patches] Applied patch of type "application/strategic-merge-patch+json" to target "kubeletconfiguration" [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-check] Waiting for a healthy kubelet at http://127.0.0.1:10248/healthz. This can take up to 4m0s [kubelet-check] The kubelet is healthy after 1.001977065s [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. |
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[root@dlp ~]# kubectl get nodes NAME STATUS ROLES AGE VERSION dlp.srv.world Ready control-plane 8m50s v1.34.2 node01.srv.world Ready <none> 2m46s v1.34.2 node02.srv.world Ready <none> 12s v1.34.2 |
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