Kubernetes : Configure Worker Node2025/05/20 |
Configure Multi Nodes Kubernetes Cluster. This example is based on the environment like follows. +----------------------+ +----------------------+ | [ ctrl.srv.world ] | | [ dlp.srv.world ] | | Manager Node | | Control Plane | +-----------+----------+ +-----------+----------+ eth0|10.0.0.25 eth0|10.0.0.30 | | ------------+--------------------------+----------- | | eth0|10.0.0.51 eth0|10.0.0.52 +-----------+----------+ +-----------+----------+ | [ node01.srv.world ] | | [ node02.srv.world ] | | Worker Node#1 | | Worker Node#2 | +----------------------+ +----------------------+ |
[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. |
[root@node01 ~]# kubeadm join 10.0.0.25:6443 --token auf5ff.higaljd63wzh7j0i \ --discovery-token-ca-cert-hash sha256:f7ed0f751e3370eb32367ee7b38ec48c5e48a997ca6935045b573c3b57df5b3e [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-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 11.001885508s [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 Manager Node or Client Hosts you did setup cluster admin file. That's Ok if all STATUS are Ready. |
[root@ctrl ~]# kubectl get nodes NAME STATUS ROLES AGE VERSION dlp.srv.world Ready control-plane 6m14s v1.31.9 node01.srv.world Ready <none> 72s v1.31.9 node02.srv.world Ready <none> 20s v1.31.9 |
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