+echo "show map" | socat stdio tcp4-connect:127.0.0.1:8401
+echo "show map /usr/local/etc/haproxy/sharding.map" | socat stdio tcp4-connect:127.0.0.1:8401
+echo "set map /usr/local/etc/haproxy/sharding.map 0 backend_3" | socat stdio tcp4-connect:127.0.0.1:8401