The current GA software is single-node only. You'll need to wait for the next release for multi-node support.
Thanks for the info, do you know approximately when it will be available?
In the meantime I have these questions:
You will have to deploy CA Experience Collector (formerly DxC) in order for data to be sent to APM or AXA.
You can, however, use NGiNX as an SSL terminator, which acts as a load balancer for multiple CEC instances. It's not exactly HA, but can address some of your concerns about availability.