---
title: Cluster State Event Source
slug: ps/help/en_us/vwaf/ag/cluster-state-event-source
docTags: 
createdAt: 2026-08-02T10:05:41.386Z
---

## Purpose

Triggers an alert both when a cluster (decider) node goes offline and back online.

:::hint{type="info"}
For more information regarding adding and editing Event Sources, see [Editing Event Sources](docId\:V6JsMMBOlcuIyvnVzNiYi).
:::

## Attributes

| Attribute     | Meaning                                                                                                                                                                                   |
| ------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| msg prefix    | Here you can enter some text, which is added to the beginning of the issued alerts when a cluster node goes offline.<br />The default text here is "The following nodes are offline:".    |
| msg up prefix | Here you can enter some text, which is added to the beginning of the issued alerts when a cluster node goes back online.<br />The default text is "The following nodes are back online:". |