Zookeeper manages the coordination of servers in the Flex Index cluster. Both the Index Nodes and Search Node rely on Zookeeper to coordinate state and communication between all nodes. For high-availability production requirements, Voyager Search recommends deploying a Zookeeper ensemble of 3 distinct Zookeeper servers.
For information on how to install Voyager Zookeeper, see the following article:
Additional information about Apache Zookeeper can be found here: