Worker Setup Steps for CKA Kubernetes Cluster

Prerequisites

• Common Setup Steps for CKA K8s Cluster: This page outlines the essential setup steps for both master and worker nodes in a Kubernetes cluster. disable swap, load the required kernel modules, set the necessary system parameters, and install CRI-O runtime, Kubeadm, and related tools.

Kube config

First, create the required Kube configuration directory and copy the kubeconfig file:

mkdir -p $HOME/.kube
cp -i /vagrant/tmp/kubeconfig $HOME/.kube/config

Join cluster

On each worker node, run the join script to connect your worker node to the cluster:

sudo /bin/bash /vagrant/tmp/join.sh -v

Finally, label the node as a worker:

NODENAME=$(hostname -s)
kubectl label node $NODENAME node-role.kubernetes.io/worker=worker

You can verify the setup by checking the status of the nodes:

vagrant@c2d-cka-worker1:~$ kubectl get nodes
NAME              STATUS   ROLES           AGE   VERSION
c2d-cka-cp        Ready    control-plane   61m   v1.28.15
c2d-cka-worker1   Ready    worker          37s   v1.28.15
vagrant@c2d-cka-worker1:~$