This article applies as of PRTG 22


Is there a way I can start over and set up my cluster configuration anew?

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Clean up a cluster configuration

If you got lost while configuring a cluster, this article will help you renew your cluster configuration.

If you cannot get a connection between your cluster nodes, you can follow the steps in this article as well to reset the individual cluster ID (GUID) and start over.

Note: When following the procedures described in this article, the monitoring configuration on your master node will remain. However, any monitoring data on your failover nodes will be lost.

Note: You must activate PRTG before you create a cluster.

Step 1: Revert all PRTG installations to standalone

It is very likely that you are currently running several PRTG core server installations, possibly some in failover mode, and one or more in master mode.

In the PRTG web interface of your master node,

  1. Select Setup | System Administration | Cluster from the main menu bar.
  2. Manually delete all possible cluster entries from the list (clear all input fields).
  3. Save your changes.

On every single PRTG core server system, on the master node as well, go through the following steps:

  1. Open the PRTG Administration Tool.
  2. Select the Service Start/Stop tab.
  3. Stop the PRTG core server service by clicking the Stop Service button.
  4. Select the Cluster tab.
  5. Click the Revert to Standalone button.
  6. When asked if you want to revert this cluster node to a standalone installation, confirm with Yes. Do not forget to REVERT YOUR MASTER NODE to standalone as well.
  7. Click OK to close the PRTG Administration Tool.
  8. When asked if you want to start the PRTG core server service, click No. This will stop the service.
  9. After reverting a failover node to Standalone mode, manually delete the data folder of the failover node. Do NOT delete this folder on the former master node.

Note: When you revert a PRTG installation to Standalone mode, the cluster probe remains in the device tree to keep your device and sensor setup. If you want to completely remove the cluster probe from the device tree, you must delete it manually.

Step 2: Set up your master node

Locate the PRTG core server installation that will be your master node. The monitoring configuration of this cluster node will be kept; the configuration on all other cluster nodes will be replaced with this configuration later.

On your master node:

  1. Open the PRTG Administration Tool.
  2. Select the Cluster tab.
  3. Click the Create a Cluster button.
  4. When asked if you want to convert this PRTG installation to the master node of a cluster, confirm with Yes.
  5. Follow the procedure to create a new master node by confirming the cluster port and cluster access key. Leave all other settings as they are.
  6. Write down the settings for cluster port, cluster access key, and the IP address of the machine that runs the master node, as you will need this information later.
  7. Exit all windows by clicking the OK buttons.
  8. When asked if you want to (re)start the PRTG core server service, click Yes.

This PRTG installation is now your master node. Log in to its PRTG web interface to set up and change the monitoring configuration. All devices created under the cluster probe will later be monitored by all cluster nodes.

Step 3: Set up your failover nodes

On each of your failover nodes:

  1. Open the PRTG Administration Tool.
  2. Select the Cluster tab.
  3. Click the Join a Cluster button.
  4. Follow the procedure to create a new failover node and use the information you wrote down earlier to insert the IP address of the master node, cluster port, as well as the correct cluster access key.
  5. Close all windows by clicking the OK buttons.
  6. When asked if you want to (re)start the PRTG core server service, click Yes.

This PRTG installation is now a failover node. It will connect to the master node and receive its configuration. Repeat the procedure in this step for each of your failover nodes.

For more details, see PRTG Manual: Failover Cluster Configuration.

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Disclaimer:
The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.