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since 4.11.3, haproxy is always restarted when add/delete a lb rule. When haproxy is started, the processes are ``` root@r-854-VM:~# ps aux |grep haproxy root 22272 0.0 0.2 4036 668 ? Ss 07:52 0:00 /usr/sbin/haproxy-systemd-wrapper -f /etc/haproxy/haproxy.cfg -p /run/haproxy.pid haproxy 22274 0.0 2.3 38444 5856 ? S 07:52 0:00 /usr/sbin/haproxy-master haproxy 22275 0.0 0.3 38444 880 ? Ss 07:52 0:00 /usr/sbin/haproxy -f /etc/haproxy/haproxy.cfg -p /run/haproxy.pid -Ds ``` When haproxy is reload, the processes are ``` root@r-854-VM:~# ps aux |grep haproxy root 22272 0.0 0.2 4168 632 ? Ss 07:52 0:00 /usr/sbin/haproxy-systemd-wrapper -f /etc/haproxy/haproxy.cfg -p /run/haproxy.pid haproxy 22283 0.0 2.3 38444 5884 ? S 07:53 0:00 /usr/sbin/haproxy-master haproxy 22286 0.0 0.3 38444 880 ? Ss 07:53 0:00 /usr/sbin/haproxy -f /etc/haproxy/haproxy.cfg -p /run/haproxy.pid -Ds -sf 22275 ``` We need to change the pid file from /var/run/haproxy.pid to /run/haproxy.pid, so the haproxy will be reloaded instead of restarted.