Deploy a High Availability Cluster

Ella Core can be deployed as a high-availability cluster to provide redundancy and failover capabilities. See High Availability for more information.

Prerequisites

• Three hosts meeting the standard system requirements.
• Ella Core installed on each host via the Install guide with cluster.bind-address set in the configuration file.

1. Start node 1

Start node 1, open a browser at the API address and initialize it normally.

2. Create a join token for node 2

Still in node 1, open the Cluster page and click Add Node, click Mint Token, then copy the token.

3. Start node 2

Start node 2, open a browser at the API address and click Join an existing cluster instead. Paste the token, enter node 1's cluster address, and click Join.

4. Add node 3

Repeat steps 2 and 3 for node 3.

5. Verify

On the Cluster page, all three nodes appear as Healthy.