I have done this setup:
1 x HPE Microserver gen10
2 ssd storage
2 Data storage
32 gig ram
1x Ubuntu 19.04 HaProxy LB 4g ram, 1vCpu
2x Ubuntu 19:04 Front (NC App + nginx + php 7.1) 8gig ram 2vCpu
1x Ubuntu 19.04 SQL/Data ( MariaDB + NFS Data storage ) 16g ram 2vCpu
The problem i have is:
Login Warning (multiple login errors)
When both Fronts up hard to login/long logintime /not logged in.
Apps not sync between fronts.
When i go to 10.0.0.xx the login takes time but when in its really fast and smooth
Same when going to url.xx and get logged in.
i know i used more resorces than i have, But at the host not near the max is reached
So its for sure a application/setup problem