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Configure an existing Explore cluster with manager-only nodes

If your Explore cluster was deployed without manager-only nodes, and includes six to nine data-only nodes, complete the procedures in this guide.

Before you begin

Disable record ingest

  1. Log in to the Administration settings through https://<extrahop-hostname-or-IP-address>/admin on any data-only node.
  2. In the Explore Cluster Settings section, click Cluster Data Management.
  3. Click Disable Record Ingest.

Next steps

Join each manager-only node to the existing Explore cluster and then continue to configure the new manager-only nodes.

Configure three manager-only nodes

  1. Log in to the Administration settings on a node intended for cluster task management.
  2. In the Appliance Settings section, click Running Config.
  3. Click Edit config.
  4. Add an entry to the running configuration file by completing the following steps:
    1. Add a comma after the second to last curly brace (}).
    2. Press ENTER to create a new line.
    3. Paste the following code on the new line before the final curly brace: 
      "cluster": {
        "data": false,
        "min_master_nodes": 2
    }
  5. Click Update.
  6. Click Done.
  7. Click Save config and then click Save.
  8. In the Appliance Settings section, click Shutdown or Restart.
  9. Next to the Search service, click Restart.
  10. Repeat these steps on each manager-only node.

Configure the data-only nodes

  1. Log in to the Administration settings on a node intended for data storage.
  2. In the Appliance Settings section, click Running Config.
  3. Click Edit config.
  4. Add an entry to the running configuration file by completing the following steps:
    1. Add a comma after the second to last curly brace (}).
    2. Press ENTER to create a new line.
    3. Paste the following code on the new line before the final curly brace: 
      "cluster": {
        "master": false,
        "min_master_nodes": 2
    }
  5. Click Update.
  6. Click Done.
  7. Click Save config and click Save.
  8. In the Appliance Settings section, click Shutdown or Restart.
  9. Next to the Search service, click Restart.
  10. Repeat these steps on each data-only node.

Next steps

After all of the nodes are configured with their designated role, connect each data-only node to ExtraHop packet sensors and ExtraHop consoles. Manager nodes should not be connected to sensors or consoles.
Tip:Learn how to add or remove nodes from a cluster that has manager-only nodes.

Enable record ingest

  1. Log in to the Administration settings on any data-only node.
  2. In the Explore Cluster Settings section, click Cluster Data Management.
  3. Click Enable Record Ingest.
Last modified 2023-11-07