Haproxy behind MS TFS (no replies)

Hi,

My organisation is using Microsoft Microsoft Team Foundation Server 2015.
In order to improve currently installed architecture, we would like to
implement high availability features and secure TFS servers behind a proxy
cluster.
I have tested HAproxy behind a single TFS server in tcp mode and it seems
that it's working fine. (http mode tests were not successful as TFS is
using NTLM to authenticate users which is not http reverse proxy
appropriate).

Next step is to add a second Haproxy node (active/active) and use
keepalived to monitor each haproxy nodes status. A second TFS node
(active/active) will be added as well.

Do you have any feedbacks of any similar setup behind a TFS server ?
Could you please share any tips that can help on this implementation ?
What is the better approach for caching source control files ?

Regards,
Reda.