環境：vlnx107001.firstshare.cn      primaryvlnx107002.firstshare.cn      slavecentos7postresql9.6repmgr4.0.5開啟防火牆firewall-cmd --zone=public --add-port=5432/tcp --permanent    重新載入firewall-cmd --reload檢視firewall-cmd --zone=public --query-port=5432/tcp一、pg9.6 安裝 1、安裝儲存庫rpm包2、安裝客戶端軟體包yum install postgresql963、安裝伺服器軟體包yum install postgresql96-server

4、初始化資料庫啟用自動啟動/usr/pgsql-9.6/bin/postgresql96-setup initdbsystemctl enable postgresql-9.6
systemctl start postgresql-9.6安裝完畢後 預設資料目錄為 ：/var/lib/pgsql/9.6/data/bin二進位制檔案目錄：/usr/pgsql-9.6/bin
或者直接RPM下載如果您不能或不想使用基於yum的安裝方法，則yum儲存庫中的所有RPM都可用於直接下載和手動安裝。
[[email protected] zhaowzh]# rpm -i postgresql96-libs-9.6.8-1PGDG.rhel7.x86_64.rpm[[email protected] zhaowzh]# rpm -i postgresql96-9.6.8-1PGDG.rhel7.x86_64.rpm[[email protected] zhaowzh]# rpm -i postgresql96-contrib-9.6.8-1PGDG.rhel7.x86_64.rpm[[email protected] zhaowzh]# rpm -i postgresql96-server-9.6.8-1PGDG.rhel7.x86_64.rpm二、安裝repmgr[[email protected] zhaowzh]# rpm -i repmgr96-4.0.5-1.rhel7.x86_64.rpm[[email protected] zhaowzh]# rpm -i repmgr96-debuginfo-4.0.5-1.rhel7.x86_64.rpm 三、構建 ssh 免密互通(以 vlnx107001上操作為例）[[email protected] ~]$ ssh-keygen -t rsa注 不要指定密碼，即 空密碼即可

將金鑰傳遞到 slave伺服器上並驗證[[email protected] ~]$ ssh-copy-id -i .ssh/id_rsa.pub 

[email protected]
四、編輯 pg_hba.conf 並重新載入配置local   repmgr          repmgr                                  trusthost    repmgr          repmgr          127.0.0.1/32            trusthost    repmgr          repmgr          172.31.107.2/32         trusthost    repmgr          repmgr          172.31.107.1/32         trusthost    postgres        repmgr          172.31.107.2/32         trustlocal   replication     repmgr                                  trusthost    replication     repmgr          127.0.0.1/32            trusthost    replication     repmgr          172.31.107.2/32         trusthost    replication     repmgr          172.31.107.1/32         trust
[[email protected] data]$  pg_ctl -D $PGDATA reload五、建立 repmgr賬號用來管理 叢集維護等操作為repmgr元資料建立專用的PostgreSQL超級使用者帳戶和資料庫[[email protected] ~]$ createuser --login --superuser repmgr[[email protected] ~]$ createdb repmgr -O repmgr驗證是否互通[[email protected] ~]$ psql -h vlnx107001.firstshare.cn -U repmgr -d postgres -c "select version()"[[email protected] postgresql]$ psql -h  vlnx107001.firstshare.cn -U repmgr -d repmgr -c "select version()"
六、編輯 repmgr.conf 配置檔案[[email protected] ~]# vim /etc/repmgr/9.6/repmgr.conf#-----------------------------------------------------------------------------#zhaowenzhong#----------------------------------------------------------------------------log_file='/var/log/repmgr/repmgr.log'pg_bindir=/usr/pgsql-9.6/binpromote_command='/usr/pgsql-9.6/bin/repmgr standby promote -f /etc/repmgr/9.6/repmgr.conf'follow_command='/usr/pgsql-9.6/bin/repmgr standby follow -f /etc/repmgr/9.6/repmgr.conf'cluster=vpgs107001node_id=107001node_name=vlnx107001conninfo='host=172.31.107.1 dbname=repmgr user=repmgr'data_directory='/var/lib/pgsql/9.6/data/'service_start_command = 'sudo systemctl start postgresql-9.6'service_stop_command = 'sudo systemctl stop postgresql-9.6'service_restart_command = 'sudo systemctl restart postgresql-9.6'service_reload_command = 'sudo systemctl reload postgresql-9.6'ssh_options=-o "StrictHostKeyChecking no"
七、註冊主服務要啟用repmgr以支援複製群集，主節點必須註冊repmgr。這將安裝repmgr 擴充套件和元資料物件，併為主伺服器新增元資料記錄：[[email protected] ~]$ repmgr -f /etc/repmgr/9.6/repmgr.conf primary register

驗證叢集的狀態：[[email protected] ~]$ repmgr -f /etc/repmgr/9.6/repmgr.conf cluster show

repmgr元資料表中

複製群集中的每個伺服器都有自己的記錄。如果repmgrd 正在使用，則節點的狀態或角色更改時會更新欄位upstream_node_id，active和 type。啟動監控[[email protected] ~]$ repmgrd -f /etc/repmgr/9.6l/repmgr.conf --verbose --monitoring-history > /var/log/repmgr/repmgr.log 2>&1 &八、克隆備用伺服器vlnx107002 上安裝 repmgr 省略 （同上）配置 repmgr.conf#----------------------------------------------------------------------------#zhaowenzhong#----------------------------------------------------------------------------log_file='/var/log/repmgr/repmgr.log'pg_bindir=/usr/pgsql-9.6/binpromote_command='/usr/pgsql-9.6/bin/repmgr standby promote -f /etc/repmgr/9.6/repmgr.conf'follow_command='/usr/pgsql-9.6/bin/repmgr standby follow -f /etc/repmgr/9.6/repmgr.conf'cluster=vpgs107001node_id=107002node_name=vlnx107002conninfo='host=172.31.107.2 dbname=repmgr user=repmgr'data_directory='/var/lib/pgsql/9.6/data/'service_start_command = 'sudo systemctl start postgresql-9.6'service_stop_command = 'sudo systemctl stop postgresql-9.6'service_restart_command = 'sudo systemctl restart postgresql-9.6'service_reload_command = 'sudo systemctl reload postgresql-9.6'ssh_options=-o "StrictHostKeyChecking no"

使用--dry-run選項檢查可以克隆的待機狀態：[[email protected] ~]$ repmgr -h vlnx107001.firstshare.cn -U repmgr -d repmgr -f /etc/repmgr/9.6/repmgr.conf -F standby clone --dry-run
開始克隆[[email protected] ~]$ repmgr -h vlnx107001.firstshare.cn -U repmgr -d repmgr -f /etc/repmgr/9.6/repmgr.conf  standby clone

克隆從主PostgreSQL的資料目錄中的檔案節點 使用PostgreSQL的pg_basebackup效用。 將會自動建立一個recovery.conf檔案，其中包含從此主伺服器開始流式傳輸的正確引數。注意： 預設情況下，主資料目錄中的任何配置檔案都將被複制到備用資料庫。通常這些將是postgresql.conf， postgresql.auto.conf，pg_hba.conf和 pg_ident.conf。這些可能需要在待機啟動之前進行修改開啟slave[[email protected] data]$ /usr/pgsql-9.6/bin/pg_ctl -D $PGDATA -l /var/lib/pgsql/9.6/data/pg_log/logfile start在備用伺服器節點上啟動監控程序[[email protected] ~]$ repmgrd -f /etc/repmgr/9.6l/repmgr.conf --verbose --monitoring-history > /var/log/repmgr/repmgr.log 2>&1 &
九、驗證是否資料同步登入 primaryrepmgr=# SELECT * FROM pg_stat_replication;
註冊備用伺服器：[[email protected] pg_log]$ repmgr -f /etc/repmgr/9.6/repmgr.conf standby register通過在待機狀態下執行repmgr cluster show來檢查節點是否已註冊：[[email protected] pg_log]$ repmgr -f /etc/repmgr/9.6/repmgr.conf cluster show