Kubernetes : Configure Worker2023/07/28 |
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Install Kubeadm to Configure Multi Nodes Kubernetes Cluster. This example is based on the environment like follows.
-----------+---------------------------+--------------------------+------------
| | |
eth0|10.0.0.25 eth0|10.0.0.71 eth0|10.0.0.72
+----------+-----------+ +-----------+-----------+ +-----------+-----------+
| [ ctrl.srv.world ] | | [snode01.srv.world] | | [snode02.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@snode01:~# kubeadm join 10.0.0.25:6443 --token wmgxmn.abjab1upv8da9bp5 \ --discovery-token-ca-cert-hash sha256:6b0bceac20f9f9e4dea0c52d8ba3b50d565d7e59ddbdeee6fd7544d140ac78fe [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. This can take up to 4m0s [kubelet-check] The kubelet is healthy after 501.334654ms [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 the message above is shown |
| [3] | Verify Status on Control Plane Node. That's Ok if all STATUS are Ready. |
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root@ctrl:~# kubectl get nodes NAME STATUS ROLES AGE VERSION ctrl.srv.world Ready control-plane 12m v1.30.3 snode01.srv.world Ready <none> 3m57s v1.30.3 snode02.srv.world Ready <none> 95s v1.30.3 |
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