1 Introduction
2 Displaying Information About Cluster Nodes
- 2.1 Cluster Node Details
- 2.2 Cluster Node Details Field Descriptions
3 Starting/Stopping Cluster Nodes
4 Sending Notifications on Status of a Cluster Node
5 Designating a Cluster Node as Preferred

Introduction

Cluster Nodes are Universal Controller instances in a Universal Automation Center system.

Universal Automation Center contains more than one cluster node only if it is operating in a High Availability environment.

Displaying Information About Cluster Nodes

When you start a cluster node for the first time, the Controller automatically creates a database record for that cluster node. You can view these records for details and status information.

Step 1

From the Agents & Connections navigation pane, select System > Cluster Nodes. The Cluster Nodes list displays:

Step 2

To display the Details for a cluster node on the list, click the Details icon next to the Node Id, or click anywhere in the row.

Cluster Node Details

For information on how to access additional details - such as Metadata and complete database Details - for Cluster Nodes (or any type of record), see Records.

Cluster Node Details Field Descriptions

The following table describes the fields on the Cluster Nodes Details

Field Name	Description

Field Name	Description
Details	This section contains detailed information about the cluster node.
Node ID	hostname:port-database_name of the cluster node.
Mode	Current mode of the cluster node: Active: Cluster node processes events and messages and interfaces with the database. It is the active node for automated operations.\\ Passive: Cluster node is running but is not connected to its OMS Server. It performs the following tasks: Accepts HTTP requests for data. It can access the database, generate reports, monitor and display data. Does not process any events or messages. Takes over as Active node if it determines that the Active node is not running. Offline: Cluster node is not running. (See Passive Cluster Node Restrictions for further information on Passive cluster node capabilities.)
Host Name
Release	System-supplied; release number for this node. Support purposes only.
IP Address	System-supplied; IP address of this node.
Build ID	System-supplied; build ID for this node. Support purposes only.
Start Time	System-supplied; date and time this node was last started.
Build Date	System-supplied; build date for this node. Support purposes only.
Timestamp	System-supplied; date and time of this node's last heartbeat.
Uptime	System-supplied; amount of time this node has been running.
Paused	Indication that the Controller has been paused.
Metadata	This section contains Metadata information about this record.
UUID	Universally Unique Identifier of this record.
Updated By	Name of the user that last updated this record.
Updated	Date and time that this record was last updated.
Created By	Name of the user that created this record.
Created	Date and time that this record was created.
Buttons	This section identifies the buttons displayed above and below the Cluster Node Details that let you perform various actions.
Refresh	Refreshes any dynamic data displayed in the Details.
Tabs	This section identifies the tabs across the top of the Cluster Node Details that provide access to additional information about the cluster node.
Cluster Notifications	Lists all notifications that have been defined for this cluster node.