kubernetes-the-hard-way-on-vagrant

docs/17-extra-dynamic-kubelet-configuration.md

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+# Dynamic Kubelet Configuration
+
+`sudo apt install -y jq`
+
+
+```
+NODE_NAME="worker-1"; NODE_NAME="worker-1"; curl -sSL "https://localhost:6443/api/v1/nodes/${NODE_NAME}/proxy/configz" -k --cert admin.crt --key admin.key | jq '.kubeletconfig|.kind="KubeletConfiguration"|.apiVersion="kubelet.config.k8s.io/v1beta1"' > kubelet_configz_${NODE_NAME}
+```
+
+```
+kubectl -n kube-system create configmap nodes-config --from-file=kubelet=kubelet_configz_${NODE_NAME} --append-hash -o yaml
+```
+
+Edit node to use the dynamically created configuration
+```
+kubectl edit worker-2
+```
+
+Configure Kubelet Service
+
+Create the `kubelet.service` systemd unit file:
+
+```
+cat <<EOF | sudo tee /etc/systemd/system/kubelet.service
+[Unit]
+Description=Kubernetes Kubelet
+Documentation=https://github.com/kubernetes/kubernetes
+After=docker.service
+Requires=docker.service
+
+[Service]
+ExecStart=/usr/local/bin/kubelet \\
+  --bootstrap-kubeconfig="/var/lib/kubelet/bootstrap-kubeconfig" \\
+  --image-pull-progress-deadline=2m \\
+  --kubeconfig=/var/lib/kubelet/kubeconfig \\
+  --dynamic-config-dir=/var/lib/kubelet/dynamic-config \\
+  --cert-dir= /var/lib/kubelet/ \\
+  --network-plugin=cni \\
+  --register-node=true \\
+  --v=2
+Restart=on-failure
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target
+EOF
+```