Kubernetes Worker Node Setup

This guide has a pre-requirement from the Kubernetes Setup Guide. Please complete it before following this guide.

Getting Started

This guide covers steps to setup the Worker Node only:

• Install Kubernetes with deployment tools
• Join worker node to cluster

Install Kubernetes with Deployment Tools

Install Kubernetes v1.33. Add the apt source:

# Add the Kubernetes repository
KUBERNETES_VERSION=v1.33
curl -fsSL https://pkgs.k8s.io/core:/stable:/$KUBERNETES_VERSION/deb/Release.key | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
echo "deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/$KUBERNETES_VERSION/deb/ /" | sudo tee /etc/apt/sources.list.d/kubernetes.list

Update apt package index and install tools:

sudo apt update
sudo apt install -y kubelet kubeadm

Join Worker Node to Cluster

Run the join command obtained from the control plane:

sudo kubeadm join [MASTER_NODE_IP]:6443 --token [TOKEN] --discovery-token-ca-cert-hash [HASH]

If the join is successful, verify from the control plane:

kubectl get nodes

Optionally, label the node as a worker for clarity:

kubectl label node <node-name> node-role.kubernetes.io/worker=""

(Optional) Install via Shell Script

A bash script is available to automate the installation:

curl https://github.com/DevilDogTG/knowledge-base/raw/refs/heads/main/System%20Administrator/Kubernetes/scripts/setup-worker.sh | sudo bash