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Adding and deleting nodes

Owned by Sarabjeet Kaur
Last updated: Nov 19, 2023
4 min read

Applies to: Kyvos Enterprise  Kyvos Cloud (SaaS on AWS) Kyvos AWS Marketplace

Kyvos Azure Marketplace   Kyvos GCP Marketplace Kyvos Single Node Installation (Kyvos SNI)

Kyvos allows you to add as many nodes as you want, to your cluster. However, the roles that you can assign to the nodes are governed by your Kyvos License.

Adding a new node

To add a node to your Kyvos cluster, perform the following steps.

  1. On the title bar, click the Menu button (hamburger icon).
    The Kyvos Manager menu appears. 

  2. On the navigation pane, click Kyvos and Ecosystem > Node and Services.  
    The Node and Service Mapping page shows the current instances configuration and the configuration allowed in your Kyvos license.

  3. On the Node and Services page, select the Add Nodes option from the three-dots menu.

  4. On the Add Nodes to Cluster dialog, enter space-separated hostnames or IP addresses for the nodes that you want to add.

  5. Click the Fetch Details button.

  6. Once the node list is retrieved, you will see a tabular view of nodes along with options to configure the Services and the number of Instances for the service on the node.
    You will also see the status in the corresponding column.


    The Node Details and Prerequisite Checks on the right show detailed information for the node, as shown in the following figure.

  7. At the time of adding nodes, you can also configure high availability for the Kyvos Web Portal and Postgres Server nodes.

  8. Select the Web Portal option from the Services list, and then click Next.
    The Web Portal HA Configuration dialog is displayed.  

  9. To configure high availability for the Web portal, select the Enable Web Portal High Availability option and provide details as:

Parameter

Description

Parameter

Description

Enable Session Management

Select to enable Tomcat-based session management. Do not select this for cloud clusters with a load balancer configured for Web Portal HA.
This option is recommended for On-Premise clusters (e.g., node-1 or http://node-1:80).

Multicast Address

Specify the multicast IP address that will be used for multi-casting messages to all web portal IP/Hostname. It is a logical identifier for a group of hosts in a computer network that is available for processing. Read more

Multicast Port

Enter the multicast port to be used for sending multicast messages.

Receiver Port

Enter the port that will be used as the receiver port

Virtual IP/Hostname

Enter the virtual IP/Hostname in the protocol://host:port format to access the Kyvos Web Portal when the Web Portal is configured with high availability mode. It is the single IP/Hostname that will be used to access the Kyvos Web Portal, regardless of the IP/Hostname on which the Web Portal is actually running.
NOTE: If protocol and port are not specified, those will be picked from the Web Portal URL. 

  1. Once done, click the Next button. The system validates the node information and shows the Validation Logs. 
    You can Filter the logs to view Info, Warnings, or Error.
    In case of any errors or warnings, click the Back button and make the requisite changes. Click the Revalidate button to recheck the configuration.

  2. Provide your Kyvos Manager Password at the bottom left of the page. 

     

  3. Click the Add button. You will be redirected to the Add node Operation page.
    Once the operation completes, you can refresh the Node and Service Mapping page to view the new node added to the list. It will also show up on the Dashboard.

Deleting a node

To delete a node from your Kyvos cluster, perform the following steps.

Note

Nodes once deleted, cannot be retrieved.

  1. On the navigation pane, click the click Kyvos and Ecosystem > Node and Services option. 

  2. On the Node and Services page, select the Delete Nodes option from the three-dots menu.

  3. On the Delete Nodes dialog box, select the nodes that you want to delete.

  4. Enter your credentials in the Password box, and click the Delete button.

Note

  • When you delete a BI Server node from a multiple BI Server nodes cluster, you need to remove Zookeeper and redeploy it using the Hadoop/EMR Configuration page, as explained in the section below.

  • You cannot delete a node if it is the ONLY BI Server node in the cluster.

  • You cannot delete the Postgres Server node from the cluster.

Hadoop/EMR Configuration page with the option for removing Zookeeper.

  • Click the Remove Zookeeper link, and provide your Kyvos Manager Password to remove the Zookeeper.

Once the Zookeeper is removed, you will see the option to deploy it on the Hadoop/EMR page, as shown in the following figure.

  1. Click the Deploy Zookeeper link, and provide your Kyvos Manager Password to deploy the Zookeeper.

  2. Click the Apply button from the top-right of the page.

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