VMware Performance agent support Foglight Agent Manager High Availability support added at VMware cartridge 5.7.7/FVE 8.8.5
After configured FGLAM HA , you also need manually add VMwarePerformance/.*/.* to FMS UI | Administration | Agent | FGLAM Adapter | Deployment WhiteList before you create VMware agent.
Start from FVE 8.9, adding VMware agent to white list reuqestmnet will be removed (VM-6448)
When the HA Primary host goes off-line, a schedule is registered that delays the transfer of the agents (and the promotion of another HA Primary) for two minutes. This delay is in place to allow the HA Primary host to be restarted and retain its HA status and assigned agents. If you find that the duration is too long, the following startup parameter can be set when launching the Management Server: