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news 来源：原创 2025/5/20 23:32:40

配置mysql8.0使用PXC实现高可用

1.构建3台服务器

node1 192.168.1.101
node2 192.168.1.102
node3 192.168.1.103

2.安装工具

dnf install -y wget vim yum-utils

3.添加软件源

wget https://repo.percona.com/yum/percona-release-latest.noarch.rpm
rpm -ivh percona-release-latest.noarch.rpm
percona-release setup pxc80

4.安装

dnf install -y percona-xtradb-cluster-80

5.编辑配置文件

[mysqld]

server-id = 1  
datadir = /var/lib/mysql
socket = /var/lib/mysql/mysql.sock
log-error = /var/log/mysqld.log
pid-file = /var/run/mysqld/mysqld.pid


wsrep_provider = /usr/lib64/galera-4/libgalera_smm.so
wsrep_cluster_name = "my_pxc_cluster"  
wsrep_cluster_address = "gcomm://192.168.1.101,192.168.1.102,192.168.1.103"  
wsrep_node_address = "192.168.1.101" 
wsrep_node_name = "node1"  
wsrep_sst_method = xtrabackup-v2
wsrep_sst_auth = "sstuser:sstpassword" 


binlog_format = ROW
default_storage_engine = InnoDB
innodb_autoinc_lock_mode = 2

6.创建用户

CREATE USER 'sstuser'@'%' IDENTIFIED BY 'sstpassword';
GRANT RELOAD, LOCK TABLES, REPLICATION CLIENT ON *.* TO 'sstuser'@'%';
FLUSH PRIVILEGES;

7.启动第一个节点

systemctl start mysql@bootstrap.service

8.登录用户

mysql -u root -p

9.添加其它节点

systemctl start mysqld

10.验证状态

SHOW STATUS LIKE 'wsrep_cluster_size';

11.安装ProxySQl

dnf install -y proxysql

12.配置

mysql_servers =
(
    { address = '192.168.1.101', port = 3306, hostgroup = 0 },
    { address = '192.168.1.102', port = 3306, hostgroup = 0 },
    { address = '192.168.1.103', port = 3306, hostgroup = 0 }
)

13.启动

systemctl start proxysql