The following section will explain how to join additional master nodes to your k3s deployment.
To run K3s in this mode, you must have an odd number of server nodes.
First of all, you will need to get the cluster token, as explained in the previous section and the master node fqdn.
curl -sfL https://get.k3s.io | \ K3S_URL="https://k3s-mstr-01.vlab.lcl:6443" \ K3S_TOKEN="K10d1...fe537::server:26a92...e34f9" \ INSTALL_K3S_EXEC="server" \ sh - --no-deploy=traefik
From the master node or any client device with access to the Kubernetes cluster, ensure that the node is now added to the cluster:
kubectl get nodes # Output: NAME STATUS ROLES AGE VERSION k3s-mstr-01 Ready control-plane,etcd,master 4m25s v1.20.2+k3s1 k3s-mstr-02 Ready control-plane,etcd,master 3m33s v1.20.2+k3s1 k3s-mstr-03 Ready control-plane,etcd,master 2m27s v1.20.2+k3s1