> service haproxy restart
...
May 08 17:47:16 FRA2C-MEDOS04 systemd[1]: Starting haproxy.service - HAProxy Load Balancer...
May 08 17:47:16 FRA2C-MEDOS04 haproxy[1219172]: [NOTICE]   (1219172) : New worker (1219177) forked
May 08 17:47:16 FRA2C-MEDOS04 haproxy[1219172]: [NOTICE]   (1219172) : Loading success.
May 08 17:47:16 FRA2C-MEDOS04 systemd[1]: Started haproxy.service - HAProxy Load Balancer.
May 08 17:47:16 FRA2C-MEDOS04 haproxy[1219177]: [WARNING]  (1219177) : Server pg_patroni_knoten/pg1 is DOWN, reason: Layer4 connection problem, info: "Connection refused", check duration: 0ms. 2 ac>
May 08 17:47:17 FRA2C-MEDOS04 haproxy[1219177]: [WARNING]  (1219177) : Server pg_patroni_knoten/pg2 is DOWN, reason: Layer4 connection problem, info: "Connection refused", check duration: 0ms. 1 ac>

> ss -antp | grep -F LISTEN | grep -F haproxy
LISTEN    0      4096                 0.0.0.0:8404                0.0.0.0:*     users:(("haproxy",pid=2513697,fd=9))
LISTEN    0      4096                 0.0.0.0:5443                0.0.0.0:*     users:(("haproxy",pid=2513697,fd=11))
LISTEN    0      4096                 0.0.0.0:5433                0.0.0.0:*     users:(("haproxy",pid=2513697,fd=10))