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Kubernetes

Step 1: Install Kubernetes packages​

K8S_VERSION=$(grep -E "k8s_version:" ansible/group_vars/all.yaml | head -n 1 | awk -F'\"' '{print $2}')

sudo apt-get install -y apt-transport-https ca-certificates curl gpg
sudo mkdir -p -m 755 /etc/apt/keyrings
curl -fsSL https://pkgs.k8s.io/core:/stable:/$K8S_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:/$K8S_VERSION/deb/ /" | \
  sudo tee /etc/apt/sources.list.d/kubernetes.list

sudo apt-get update
sudo apt-get install -y kubelet kubeadm kubectl
sudo apt-mark hold kubelet kubeadm kubectl
note

Ansible installs and pins these packages for you when using the provisioning playbook.

Step 2: Initialize the control plane​

sudo kubeadm init --pod-network-cidr=10.244.0.0/16
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
kubectl taint nodes --all node-role.kubernetes.io/control-plane-
note

If you maintain a kubeadm config, create clusters/home/ and replace the command with sudo kubeadm init --config clusters/home/kubeadm-clusterconfiguration.yaml.

Step 3: Join worker nodes​

Follow Join Worker Nodes after the control plane is ready.

Step 4: Save kubeadm configuration​

mkdir -p clusters/home
kubectl -n kube-system get configmap kubeadm-config -o jsonpath='{.data.ClusterConfiguration}' > clusters/home/kubeadm-clusterconfiguration.yaml