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Add nodes in cluster setup

  • 업데이트: 2021/10/13
    • Automation 360 v.x
    • 탐색
    • RPA Workspace

Add nodes in cluster setup

As a RPA platform administrator, to manage and maintain the cluster nodes, you can add one or more nodes in the existing cluster.

전제 조건

Ensure the following:

  • Verify 선행조건.
  • All primary nodes and databases have backup in place.
  • You have administrator/root privileges on the Control Room servers. The administrator must be familiar with Control Room custom mode installations and the configuration settings.
  • You must have the IP addresses of all cluster member network interfaces used for Elasticsearch communications.
    주: The Control Room servers can have multiple network interfaces. The server IP addresses must be statically assigned and cannot use the Dynamic Host Configuration Protocol (DHCP).
  • If any external load-balancers are used in the environment, update them with information from the new server nodes.

Adding the nodes in the existing cluster helps you to perform cluster maintenance or to upgrade the nodes in the cluster from an older configuration to a newer version. This task involves the addition of Control Room cluster nodes, changing of cluster node IP address, and monitoring the health of the underlying cluster services.

You can add one or more nodes in an existing cluster set-up. This task describes about the scenario to add three new nodes in an existing three node cluster. Three nodes is the minimal number of nodes supported within a Control Room cluster. Each node in the cluster synchronizes with each other over the local network. All nodes in the cluster connects to the same database. Follow the steps to add three new nodes (N4, N5, and N6) to an existing three nodes (N1, N2, and N3) cluster.


  1. On the first new node N4, log in to the operating system as an administrator and run theControl Room installer.
  2. Proceed through the installer to the cluster configuration.
    1. Select Enable Cluster Setup.
    2. In the Cluster IP addresses box, enter the IP addresses of all nodes that you need to configure in the cluster.,,,,,
    주: The sequence of the IP address must be entered in the same order on every new node.
  3. Restart the nodes with one node at a time.
    After restarting the nodes, all the nodes will have six members.
  4. Complete the rest of the Control Room installation.
  5. Repeat the steps 1 through 4 for nodes N5 and N6.
  6. To verify the cluster health, use the Elasticsearch API through a browser or API tool.
    1. From a browser navigate to any cluster node IP address using the Elasticsearch port 47599 and use the _cat/nodes API.
      주: The master node is indicated by the asterix (*).
    2. Verify that the master node IP address is same as mentioned in the elasticsearch.yml file for all the nodes.
    3. From a browser navigate to any cluster node IP address using the Elasticsearch port 47599 and use the _cat/health?pretty API
    주: You must wait until the replication status is showing green. The replication time varies depending on the amount of data load in the clusters. The replication status turns green when the cluster is fully synchronized.
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