postgresql 高可用 repmgr 的使用之八常用的几个命令

stop pgsql

$ pg_ctl -D /var/lib/postgresql/9.6/main -m fast stop
或者
$ sudo pg_ctlcluster 9.6 main stop

clone standby

$ repmgr -h 192.168.56.101 -U repmgr -d repmgr -f /etc/repmgr.conf standby clone --dry-run  --verbose

$ repmgr -h 192.168.56.101 -U repmgr -d repmgr -f /etc/repmgr.conf standby clone  --verbose

start pgsql

$ sudo pg_ctlcluster 9.6 main start

$ repmgr -f /etc/repmgr.conf primary register --upstream-node-id=1 --verbose
	  
$ repmgr -f /etc/repmgr.conf standby register --upstream-node-id=1 --verbose

$ repmgr -f /etc/repmgr.conf primary register --upstream-node-id=1 --force --verbose
	  
$ repmgr -f /etc/repmgr.conf standby register --upstream-node-id=1 --force --verbose

switchover

$ repmgr -f /etc/repmgr.conf standby switchover --dry-run --force-rewind --siblings-follow  --verbose

$ repmgr -f /etc/repmgr.conf standby switchover --force-rewind  --siblings-follow --verbose

–siblings-follow 表示所有备份节点的 upstream 变更为新的master

promote

$ repmgr -f /etc/repmgr.conf standby promote --verbose

node rejoin

$ repmgr -f /etc/repmgr.conf node rejoin -d 'host=10.101.70.90 user=repmgr dbname=repmgr connect_timeout=2' --force-rewind --dry-run --verbose

$ repmgr -f /etc/repmgr.conf node rejoin -d 'host=10.101.70.90 user=repmgr dbname=repmgr connect_timeout=2' --force-rewind --verbose

cluster

$ repmgr -f /etc/repmgr.conf cluster show

$ repmgr -f /etc/repmgr.conf cluster crosscheck

$ repmgr -f /etc/repmgr.conf cluster event

$ repmgr -f /etc/repmgr.conf cluster event --event=repmgrd_start