backend galera_cluster
      mode tcp
      balance leastconn
      option tcpka
      option mysql-check user haproxy_check
      server host1.domain.tld 172.16.0.201:3306 check weight 1
      server host1.domain.tld 172.16.0.202:3306 check weight 1
      server host1.domain.tld 172.16.0.203:3306 check weight 1