Kubernetes : Configure Worker Node2021/11/11 |
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Install Kubeadm to Configure Multi Nodes Kubernetes Cluster.
This example is based on the environment like follows.
-----------+---------------------------+--------------------------+------------
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eth0|10.0.0.30 eth0|10.0.0.51 eth0|10.0.0.52
+----------+-----------+ +-----------+----------+ +-----------+----------+
| [ dlp.srv.world ] | | [ node01.srv.world ] | | [ node02.srv.world ] |
| Master Node | | Worker Node | | Worker Node |
+----------------------+ +----------------------+ +----------------------+
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| [1] | |
| [2] | Join in Kubernetes Cluster which is initialized on Master 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 wa9v2x.wkwtjgfs9nhq0nb9 \ --discovery-token-ca-cert-hash sha256:58012e541b9b0bc9f229e5d0c763d6dbf202f5b9be95ed428e0a97c0a04d9488 [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 Master 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,master 14m v1.21.0 node01.srv.world Ready <none> 68s v1.21.0 node02.srv.world Ready <none> 21s v1.21.0 |
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