The HAProxy configuration has been tested against an 8-node vRealize Operations Manager cluster.
Clusters with fewer nodes up to a maximum of 16 analytics nodes are also supported and require the same configuration. Every time the cluster is expanded, and a new node is deployed you must edit the HAProxy configuration and add the IP address of the new node. After editing the configuration file, the HAProxy service should always be restarted so the configuration is reloaded. We recommended to set HAProxy global max. connections parameter (2000) and node max. connections parameter (140) which covers most of the cases. However, we strongly suggested to check the sizing of your environment and adjust those settings based on vROps load.