准备三台主机
| IP | 角色名 |
| 192.168.1.51 | PXC1 |
| 192.168.1.52 | PXC2 |
| 192.168.1.53 | PXC3 |
三台主机配置主机名
[root@localhost ~]# hostnamectl set-hostname pxc1
[root@localhost ~]# hostnamectl set-hostname pxc2
[root@localhost ~]# hostnamectl set-hostname pxc3
停止mysql服务
[root@localhost ~]# yum module disable mysql
安装Percona XtraDB Cluster（三台主机均进行此操作）
#添加 Percona 存储库
[root@localhost ~]# yum install https://repo.percona.com/yum/percona-release-latest.noarch.rpm
[root@localhost ~]# percona-release setup pxc-80
#安装pxc
[root@localhost ~]# yum install percona-xtradb-cluster
配置文件
pxc1(192.168.1.51)
[root@localhost ~]# /etc/my.cnf
[mysqld]
server-id=51
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
wsrep_cluster_address=gcomm://192.168.1.51,192.168.1.52,192.168.1.53
wsrep_node_address=192.168.1.51
wsrep_node_name=pxc1
pxc2(192.168.1.52)
[root@localhost ~]# /etc/my.cnf
[mysqld]
server-id=52
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
wsrep_cluster_address=gcomm://192.168.1.51,192.168.1.52,192.168.1.53
wsrep_node_address=192.168.1.52
wsrep_node_name=pxc2
pxc3(192.168.1.53)
[root@localhost ~]# /etc/my.cnf
[mysqld]
server-id=53
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
wsrep_cluster_address=gcomm://192.168.1.51,192.168.1.52,192.168.1.53
wsrep_node_address=192.168.1.53
wsrep_node_name=pxc3
启动之前确保三台主机用同一套 密钥和证书
[root@localhost ~]# scp /var/lib/mysql/*.pem pxc2:/var/lib/mysql/
[root@localhost ~]# scp /var/lib/mysql/*.pem pxc3:/var/lib/mysql/
修改权限
pxc2(192.168.1.52)
[root@localhost ~]# chown -R mysql.mysql /var/lib/mysql/
pxc3(192.168.1.53)
[root@localhost ~]# chown -R mysql.mysql /var/lib/mysql/
启动服务
pxc1(192.168.1.51)
[root@localhost ~]# systemctl start mysql@bootstrap.service
pxc2(192.168.1.52)
[root@localhost ~]# systemctl start mysql.service
pxc3(192.168.1.53)
[root@localhost ~]# systemctl start mysql.service
进入MySQL服务（修改密码之后）
[root@localhost mysql]# mysql -u root -p'123456'
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 31
Server version: 8.0.41-32.1 Percona XtraDB Cluster (GPL), Release rel32, Revision 9cd31bf, WSREP version 26.1.4.3
Copyright (c) 2009-2025 Percona LLC and/or its affiliates
Copyright (c) 2000, 2025, Oracle and/or its affiliates.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
查询 Percona XtraDB Cluster (PXC) 集群的视图信息
mysql> select * from performance_schema.pxc_cluster_view;
+-----------+--------------------------------------+--------+-------------+---------+
| HOST_NAME | UUID | STATUS | LOCAL_INDEX | SEGMENT |
+-----------+--------------------------------------+--------+-------------+---------+
| pxc1 | 04e534f3-0333-11f0-b3eb-636663cd336a | SYNCED | 0 | 0 |
| pxc3 | af3108bc-0334-11f0-be46-9bcd0d0e82c0 | SYNCED | 1 | 0 |
| pxc2 | bee7cc62-0334-11f0-a0c9-5f47d1b228fe | SYNCED | 2 | 0 |
+-----------+--------------------------------------+--------+-------------+---------+
3 rows in set (0.01 sec)
查看 Percona XtraDB Cluster (PXC) 相关状态（可以在任意一个节点执行以下命令）
mysql> show status where Variable_name in ('wsrep_cluster_size','wsrep_cluster_status','wsrep_connected','wsrep_ready') ;
+----------------------+---------+
| Variable_name | Value |
+----------------------+---------+
| wsrep_cluster_size | 3 |
| wsrep_cluster_status | Primary |
| wsrep_connected | ON |
| wsrep_ready | ON |
+----------------------+---------+
4 rows in set (0.00 sec)
