[PostgreSQL] PostgreSQL 13 Primary/standby 이중화(HA) 구성 OS 환경CentOS 7.9 IPPrimary : 192.168.136.187Standby : 192.168.136.188vip : 192.168.136.189 DML, 192.168.136.190 Select DB 환경PostgreSQL 13.12 사전작업 (both)방화벽 중지-- primary[root@pg-ha1 ~]# systemctl stop firewalld[root@pg-ha1 ~]# systemctl disable firewalld-- standby[root@pg-ha2 ~]# systemctl stop firewalld[root@pg-ha2 ~]# systemctl disable firewa..