> For the complete documentation index, see [llms.txt](https://docs.openg2p.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.openg2p.org/operations/deployment/deployment-guide/adding-and-removing-nodes-in-cluster.md).

# Adding and Removing Nodes in Cluster

## Adding Nodes to Cluster

Below are the steps to add new nodes to an existing Kubernetes cluster.

* From [kubernetes/rke2](https://github.com/OpenG2P/openg2p-deployment/tree/main/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](https://github.com/rancher/rke2/releases). Use `rke2 --version` on an existing node to get the version.)

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  ```
  export INSTALL_RKE2_VERSION="v1.28.9+rke2r1"
  ```
* Run the below command to download RKE2.

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  ```
  curl -sfL https://get.rke2.io | sh -
  ```
* Run the below commands to start RKE2 node.

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  ```
  systemctl enable rke2-server
  systemctl start rke2-server
  ```

## Deleting Nodes from Cluster

Follow the steps below to remove a node from the Kubernetes cluster.

* Before you delete the node, make sure the **PodDisruptionBudget** is set to "**0**" on deleting node. Click [here](https://kubernetes.io/docs/tasks/run-application/configure-pdb/) for more information.
* To drain the node from the cluster, run the command below.

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  ```
  kubectl drain <nodename> --ignore-daemonsets --delete-emptydir-data
  ```
* Once done draining the node, run the command below to delete it from the cluster.

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  ```
  kubectl delete node <nodename>
  ```
* After deleting the node, check your Kubernetes cluster to ensure the node has been deleted.
* Make sure the node IP is removed from the LoadBalancer/NGINX to avoid intermittent issues in the environment.

[<br>](https://docs.openg2p.org/1.3/deployment/base-infrastructure/openg2p-cluster/cluster-setup/adding-nodes-to-cluster)


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