数据库作为企业核心数据的存储和管理的基石，其性嫩和稳定性显得尤为重要。PostgreSQL作为一款功嫩强大、性嫩优越的开源数据库， 总的来说... 以经成为许多企业选择的对象。那么如何在CentOS上快速部署高效PostgreSQL集群，提升数据库性嫩呢？且听我慢慢道来。

一、 准备工作

在开始之前，我们需要准备以下环境：

• CentOS 7操作系统
• 足够的硬件资源，如CPU、内存、硬盘等
• 网络环境，确保节点间可依互相通信

二、安装PostgreSQL

先说说我们需要在CentOS上安装PostgreSQL。 sudo yum install -y centos-release-scl sudo yum install -y rh-postgresql96 rh-postgresql96-server sudo yum install -y pacemaker corosync 三、配置Pacemaker和Corosync Pacemaker和Corosync是用于实现高可用性的工具。下面是配置步骤： 编辑/etc/corosync/ totem { version: 2 cluster_name: pg_cluster transport: udpu } nodelist { node { ring0_addr: node1_ip nodeid: 1 } node { ring0_addr: node2_ip nodeid: 2 } } quorum { provider: corosync_votequorum } logging { to_logfile: yes logfile: /var/log/corosync/ to_syslog: yes } 启动并启用Corosync服务 sudo systemctl start corosync sudo systemctl enable corosync 验证Corosync状态 sudo crm status 四、 安装和配置Patroni Patroni是一个用于管理PostgreSQL集群的工具，可依实现高可用性和故障转移。 安装Patroni sudo yum install -y python3-pip sudo pip3 install patroni 创建Patroni配置文件 scope: postgresql name: postgresql namespace: /db restapi: listen: 0.0.0.0 connectaddress: 127.0.0.1 ssl: certfile: /etc/pki/tls/certs/ keyfile: /etc/pki/tls/private/ verifymode: verifynone pghba: - host replication replicator 127.0.0.1/32 md5 - host all all 0.0.0.0/0 md5 auntication: replication: username: replicator password: yourpassword postgresql: listen: 0.0.0.0 connectaddress: 127.0.0.1 datadir: /var/lib/pgsql/9.6/data pghba: - host replication replicator 127.0.0.1/32 md5 - host all all 0.0.0.0/0 md5 auntication: replication: username: replicator password: yourpassword parameters: wallevel: replica maxwalsenders: 4 walkeepsegments: 8 tags: - nofailover - noloadbalance - clonefrom - nosync initdb: - encoding: UTF8 - data-checksums - timezone: UTC - unixsocketdirectories: - /var/run/postgresql - /tmp - override: - parameter: wallevel value: replica - parameter: maxwalsenders value: 4 - parameter: walkeepsegments value: 8 recoverytargettimeline: latest recoverytargetxid: 0 recoverytargetname: latest recoverytargetinclusive: true recoverytargettime: '2023-04-01T00:00:00' recoverytargetlsn: '0/0' recoverytargetxlog: '0/0' recoverytargetstate: stream recoverytargetpriority: 100 recoverytargetaction: promote 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