Configure a new Explore cluster with master nodes

A master node is dedicated to cluster management tasks and does not store records. This guide provides guidelines for adding three master nodes to new clusters that have six or more data-only nodes.

Before you begin

  • Review the specifications and guidelines in Deploying master nodes
  • Deploy three master-only nodes and six or more data-only nodes according to the guide for your implementation, but do not join the nodes to form a cluster or connect the nodes to Discover or Command appliances.
  • Depending on your implementation, reduce the data disk size to meet the master node specifications.
  • Register each node with the correct product license. Master-only nodes have dedicated SKUs; be sure to verify these licenses with your account team.
  • Join all of the nodes in a cluster.

Configure three master-only nodes

  1. Log in to the Admin UI 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 Config 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 master-only node.

Configure the data-only nodes

  1. Log in to the Admin UI 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 Config 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 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 data-only node.

Next steps

After all of the nodes are configured with their designated role, connect each data-only node to Discover and Command appliances. Master nodes should not be connected to a Discover or Command appliance.
Tip:Learn how to add or remove nodes from a cluster that has master nodes.
Published 2020-05-18 19:49