mysql 主从配置 linux环境

参考：

https://blog.csdn.net/D1179869625/article/details/120773725

[root@localhost ~]# vi /etc/my.cnf

[mysqld]
bind-address=0.0.0.0
port=3306
user=mysql
basedir=/usr/local/mysql
datadir=/data/mysql
socket=/tmp/mysql.sock
log-error=/data/mysql/mysql.err
pid-file=/data/mysql/mysql.pid
#character config
character_set_server=utf8mb4
symbolic-links=0
explicit_defaults_for_timestamp=true

log-bin=mysql-bin
server-id=12
log-slave-updates=true
innodb_flush_log_at_trx_commit=1
sync_binlog=1

重启数据库，并查看以下配置是否生效

mysql> show variables like 'server_id';
mysql> show variables like 'log_bin';
#skip_networking默认是OFF关闭状态，启用后主从将无法通信
mysql> show variables like '%skip_networking%';

在主库上建立用于主从复制的账号

mysql> CREATE USER 'rep1'@'%';
mysql> GRANT REPLICATION SLAVE ON *.*  TO  'rep1'@'%'  identified by 'password';

mysql> show master status\G

slave从库配置

在从库上面测试之前建立的复制账号是否可以连接主库

 编辑配置文件my.cnf

[mysqld]
bind-address=0.0.0.0
port=3306
user=mysql
basedir=/usr/local/mysql
datadir=/data/mysql
socket=/tmp/mysql.sock
log-error=/data/mysql/mysql.err
pid-file=/data/mysql/mysql.pid
#character config
character_set_server=utf8mb4
symbolic-links=0
explicit_defaults_for_timestamp=true



server-id=15
relay-log=relay-log-bin
relay-log-index=slave-relay-bin.index

配置复制参数

# 配置同步，注意 master_log_file 和 master_log_pos 的值要与Master的一致
mysql> CHANGE MASTER TO MASTER_HOST='192.168.169.131',MASTER_USER='rep1',MASTER_PASSWORD='password',MASTER_LOG_FILE='mysql-bin.000002',MASTER_LOG_POS=682;

# 启动同步，如有报错执行 reset slave;
mysql> start slave;

查看slave的状态

mysql> show slave status\G