Adding Nodes to Cluster

Guide to add nodes to an existing Kubernetes cluster

Below are the steps to add more nodes to the Kubernetes cluster.

• From kubernetes/rke2 directory, use the rke2-server.conf.subsequent.template or rke2-agent.conf.template based on whether the new node is control plane node or worker node. Copy this file to /etc/rancher/rke2/config.yaml in the new node.

• Configure the config.yaml with relevant values.

• Run the following to set the RKE2 version. Make sure this version is the same across all the nodes. (Refer to RKE2 Releases. Use rke2 --version on an existing node to get the version.)

  export INSTALL_RKE2_VERSION="v1.28.9+rke2r1"

• Run the below command to download RKE2.

  curl -sfL https://get.rke2.io | sh -

• Run the below commands to start RKE2 node.

  systemctl enable rke2-server
  systemctl start rke2-server