# Attach Node To Cluster

Nodes must be attached and authorized to Platform9 using either the [Platform9 CLI](/managed-kubernetes/5.15/pmk-cli/cli-overview.md) or through downloading and installing the Platform9 HostAgent manually.

Once a node is attached and authorized nodes may be attached to a Kubernetes cluster.

### Attach Node(s) from Clusters tab

Follow the steps given below to attach a node to a cluster.

1. Navigate to Infrastructure > Clusters.
2. Select the cluster to which you wish to attach a node.
3. Click `Scale Masters` or `Scale Workers` (seen above the list of clusters).
4. Select `Add` .
5. Confirm the change and the nodes will be attached.

{% hint style="success" %}
**Success**

The node(s) is/are successfully attached to the selected cluster.
{% endhint %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.platform9.com/managed-kubernetes/5.15/clusters/nodes/attach-node-to-cluster.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.