I have a few target groups for my NLB for ports 80 and 443.
It has 2 healthy targets.
Trying to add one more target, it gets added successfully to target group for port 443 but health check is failing for port 80.
If I create a new target group for port 80 and assign it for NLB port 800, then I can add the same target IP into new target group without issues, but cannot add it to old 80 target group.
Tried to change the health-check params between TCP and HTTP but with no difference.
How to troubleshoot that?
I'm sure the service is running well, can send traffic to the port