Here is a pretty lazy haproxy round robin tcp config which will redirect http requests to https.
#---------------------------------------------------------------------
# Redirect to secured
#---------------------------------------------------------------------
frontend unsecured *:80
redirect location https://foo.bar.com
#---------------------------------------------------------------------
# frontend secured
#---------------------------------------------------------------------
frontend secured *:443
mode tcp
default_backend app
#---------------------------------------------------------------------
# round robin balancing between the various backends
#---------------------------------------------------------------------
backend app
mode tcp
balance roundrobin
server app1 127.0.0.1:5001 check
server app2 127.0.0.1:5002 check
server app3 127.0.0.1:5003 check
server app4 127.0.0.1:5004 check