// docker를 이용한 PostgreSQL replication // OS release : centos 7 (3.10.0-1127.el7.x86_64) // docker 설치 [root@test]$ yum install docker -y [root@test]$ systemctl enable docker [root@test]$ systemctl start docker // pgpool 설치 (failover 및 failback에 사용되는 패키지) [root@test]$ yum install -y https://www.pgpool.net/yum/rpms/4.2/redhat/rhel-7-x86_64/pgpool-II-pg10-4.2.1-1pgdg.rhel7.x86_64.rpm [root@test]$ yu..