haproxy.cnf

frontend isb3dprinters
  bind :80

  # route to a backend based on path's prefix
  use_backend octo1 if { path /printer1 } || { path_beg /printer1/ }
  use_backend octo2 if { path /printer2 } || { path_beg /printer2/ }
  use_backend octo3 if { path /printer3 } || { path_beg /printer3/ }
  use_backend octo4 if { path /printer4 } || { path_beg /printer4/ }

defaults
  retries           3
  maxconn           2000
  timeout connect   50s
  timeout client    50s
  timeout server    50s
  resolvers docker_resolver
  nameserver dns 127.0.0.11:53

backend octo1
  # strip the prefix off of the path
  http-request replace-path /printer1(/)?(.*) /\2
  server server1 127.0.0.1:8081 check maxconn 5
backend octo2
  # strip the prefix off of the path
  http-request replace-path /printer2(/)?(.*) /\2
  server server1 127.0.0.1:8002 check maxconn 5
backend octo3
  # strip the prefix off of the path
  http-request replace-path /printer3(/)?(.*) /\2
  server server1 127.0.0.1:8003 check maxconn 5
backend octo4
  # strip the prefix off of the path
  http-request replace-path /printer4(/)?(.*) /\2
  server server1 127.0.0.1:8004 check maxconn 5