mv /etc/haproxy/config /etc/haproxy/config.old

  mv /var/run/haproxy.pid /var/run/haproxy.pid.old   mv /etc/haproxy/config.new /etc/haproxy/config   kill -TTOU $(cat /var/run/haproxy.pid.old)   if haproxy -p /var/run/haproxy.pid -f /etc/haproxy/config; then     echo "New instance successfully loaded, stopping previous one."     kill -USR1 $(cat /var/run/haproxy.pid.old)     rm -f /var/run/haproxy.pid.old     exit 1   else     echo "New instance failed to start, resuming previous one."     kill -TTIN $(cat /var/run/haproxy.pid.old)     rm -f /var/run/haproxy.pid     mv /var/run/haproxy.pid.old /var/run/haproxy.pid     mv /etc/haproxy/config /etc/haproxy/config.new     mv /etc/haproxy/config.old /etc/haproxy/config     exit 0   fi