在CentOS系统上实现MySQL的读写分离,通常需要以下几个步骤:
安装MySQL主从复制:
配置主服务器:
/etc/my.cnf
或/etc/mysql/my.cnf
),添加以下内容:[mysqld]
server-id = 1
log_bin = /var/log/mysql/mysql-bin.log
binlog_do_db = your_database_name # 替换为你要复制的数据库名称
sudo systemctl restart mysqld
CREATE USER 'replicator'@'%' IDENTIFIED BY 'password'; # 替换为你的密码
GRANT REPLICATION SLAVE ON *.* TO 'replicator'@'%';
FLUSH PRIVILEGES;
配置从服务器:
[mysqld]
server-id = 2
relay_log = /var/log/mysql/mysql-relay-bin.log
log_bin = /var/log/mysql/mysql-bin.log
replicate_do_db = your_database_name # 替换为你要复制的数据库名称
sudo systemctl restart mysqld
CHANGE MASTER TO
MASTER_HOST='master_ip', # 替换为主服务器的IP地址
MASTER_USER='replicator',
MASTER_PASSWORD='password', # 替换为你的密码
MASTER_LOG_FILE='mysql-bin.000001', # 替换为主服务器的binlog文件名
MASTER_LOG_POS=123; # 替换为主服务器的binlog位置
START SLAVE;
验证复制状态:
SHOW MASTER STATUS;
SHOW SLAVE STATUS\G
Slave_IO_Running
和Slave_SQL_Running
都是Yes
。配置读写分离:
sudo yum install proxysql
/etc/proxysql.cnf
),配置主从服务器和读写分离规则:[mysqld]
bind_address = 0.0.0.0
[mysql_servers]
server=master_ip,hostname=master,weight=1
server=slave_ip,hostname=slave,weight=1
[mysql_query_rules]
rule=1, name="read-only", active=1
match_pattern=^SELECT, GROUP BY, ORDER BY, LIMIT
destination_hostgroup=slave_group
rule=2, name="read-write", active=1
match_pattern=^INSERT, UPDATE, DELETE, CREATE, DROP, ALTER
destination_hostgroup=master_group
[mysql_hostgroups]
hostgroup=master_group, hostname=master_ip
hostgroup=slave_group, hostname=slave_ip
sudo systemctl start proxysql
测试读写分离:
通过以上步骤,你可以在CentOS系统上实现MySQL的读写分离。根据实际需求,你可能需要进一步调整配置和优化性能。