发现问题，
[root@registry ~]# systemctl status haproxy
● haproxy.service - HAProxy Load Balancer
Loaded: loaded (/usr/lib/systemd/system/haproxy.service; enabled; vendor preset: disabled)
Active: failed (Result: exit-code) since 三 2021-06-16 08:41:15 CST; 7s ago
Process: 44290 ExecStart=/usr/sbin/haproxy-systemd-wrapper -f /etc/haproxy/haproxy.cfg -p /run/haproxy.pid $OPTIONS (code=exited, status=1/FAILURE)
Main PID: 44290 (code=exited, status=1/FAILURE)
6月 16 08:41:15 registry.openshit4.example.com haproxy-systemd-wrapper[44290]: [ALERT] 166/084112 (44291) : Error(s) found in configuration file : /etc/haproxy/haproxy.cfg
6月 16 08:41:15 registry.openshit4.example.com haproxy-systemd-wrapper[44290]: [WARNING] 166/084115 (44291) : config : 'option forwardfor' ignored for frontend 'openshift-api-server' as it requires HTTP mode.
6月 16 08:41:15 registry.openshit4.example.com haproxy-systemd-wrapper[44290]: [WARNING] 166/084115 (44291) : config : 'option forwardfor' ignored for backend 'openshift-api-server' as it requires HTTP mode.
6月 16 08:41:15 registry.openshit4.example.com haproxy-systemd-wrapper[44290]: [WARNING] 166/084115 (44291) : config : 'option forwardfor' ignored for frontend 'machine-config-server' as it requires HTTP mode.
6月 16 08:41:15 registry.openshit4.example.com haproxy-systemd-wrapper[44290]: [WARNING] 166/084115 (44291) : config : 'option forwardfor' ignored for backend 'machine-config-server' as it requires HTTP mode.
6月 16 08:41:15 registry.openshit4.example.com haproxy-systemd-wrapper[44290]: [ALERT] 166/084115 (44291) : Fatal errors found in configuration.
6月 16 08:41:15 registry.openshit4.example.com haproxy-systemd-wrapper[44290]: haproxy-systemd-wrapper: exit, haproxy RC=1
6月 16 08:41:15 registry.openshit4.example.com systemd[1]: haproxy.service: main process exited, code=exited, status=1/FAILURE
6月 16 08:41:15 registry.openshit4.example.com systemd[1]: Unit haproxy.service entered failed state.
6月 16 08:41:15 registry.openshit4.example.com systemd[1]: haproxy.service failed.
原来是ip 配置错误：
我擦， 这错误提示 不靠谱！