aggregations section is part of HAProxy Enterprise's Stick Table Aggregator module functionality.
The Stick Table Aggregator is similar to the
peers feature, except that unlike
peers it combines stick table data from multiple nodes rather than overwrite it. It is designed for active-active clustering of load balancers. The
peers feature, in contrast, is meant for active-standby clustering only.
To use the Stick Table Aggregator, install the
aggregations block contains
peer entries for each of the load balancer hosts whose tables are being aggregated. It also contains a
peer entry for the aggregation host itself, which is where this configuration file and the
hapee-extras-stktagg package reside.
aggregations AGGR peer
loadbalancer1192.168.122.222:54321 peer loadbalancer2192.168.122.76:54321 peer agghost192.168.122.13:54321 local from .local to .aggr