postgresql 高可用 etcd + patroni 之八 haproxy + keepalived
os:ubuntu16.04postgresql:9.6.9etcd:3.2.18patroni:1.4.4haproxy:1.6.3keepalived:1.2.24ip规划192.168.56.101node1master192.168.56.102node2slave192.168.56.103node3slave192.168.56.104node4slave192.168.56.105n