Adding a Node to an Existing Cluster
To add a node in Redis Enterprise Software (RS):
- Install the installation package on the machine that will serve as the new node. For additional details, refer to installing the setup package.
In a browser, navigate to https://<name or IP address of the node on which you installed the package>:8443. For example, if you installed the RS package on a machine with IP address 10.0.1.34, then navigate to https://10.0.1.34:8443.
Note: The RS management UI uses SSL encryption. For additional details, refer to Updating SSL certificates.
In the window that appears, click Setup.
In the Node configuration page:
- Enter a path for Persistent storage, or leave the default path. For additional details, refer to Persistent and ephemeral storage.
- You can enter a path for Ephemeral storage, or leave the default path. For additional details, refer to Persistent and ephemeral storage.
- If you want to enable Redis on Flash, select the check box Enable flash storage support and enter the path to the Flash storage that should be used as RAM extension. For additional details, refer to Redis on Flash.
- If your machine is configured to have multiple IP addresses, the section IP Addresses Usage is displayed. Use the IP Addresses Usage section to assign a single IPv4 type address for internal traffic and multiple IPv4/IPv6 type addresses for external traffic. For additional details, refer to Multi-IP & IPv6.
- In Cluster configuration, select Join cluster.
Enter an IP address of a node in the cluster.
Note: You must use the internal IP address if the node has both an internal and external IP address.
Enter the credentials of the cluster administrator, which you defined when you created the cluster.
If the cluster is configured to support rack-zone awareness, you are redirected to a page in which you must set the node's Rack-zone ID. For additional details, refer to Rack-zone awareness.
After a short wait, the node is added to the cluster, and the cluster management UI appears, displaying the Nodes page. This page lists all the cluster nodes, including the new node you just added.
Note: It is highly advisable to verify that the node is functioning properly, by running the rlcheck utility. For additional details, refer to rlcheck Installation Verification Utility
Note: The clocks on all nodes must always be synchronized. If the clock in the node you are trying to join to the cluster is not synchronized with the nodes already in the cluster the action will fail and an error message will appear indicating that you must synchronize the clocks first. For guidelines, refer to Synchronizing Node Clocks.
Note: The DNS records must be updated each time a node is added or replaced. For additional details, refer to DNS.