MySQL主从复制（实操）

一主一从模式

配置文件路径 /etc/my.cnf

1. 主服务器（ /etc/my.cnf ）

基础配置
skip_name_resolve=ON
innodb_file_per_table=ON
server-id=1
log-bin=master-bin
log-bin-index=master-bin.index

登录bash，创建用户并授权

• mysql -uroot -p
• grant replication slave ,replication client on *.* to 'slave'@'%' identified by '123456';
• flush privileges;

查看主服务器的状态信息，在从服务器中会用到
show master status\G

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2. 从服务器

基础配置（ /etc/my.cnf ）
skip_name_resolve=ON
innodb_file_per_table=ON
server-id=2
relay_log=slave_relay_bin

登录bash，配置master并开启slave

• mysql -uroot -p
• stop slave;
• change master to master_host='192.168.43.56',master_port=3306,master_user='slave',master_password='123456',master_log_file='master-bin.000001',master_log_pos=245;
• start slave;
• show slave status\G;

查看从服务器的状态信息，检车slave状态

image.png

主主复制模式

在主从复制的基础上继续处理，即：在主服务器（master）上开启relay_log，在从服务器（slave）上开启log-bin，并且把步进值改为n

master

skip_name_resolve = ON
innodb_file_per_table = ON
server-id = 21
auto_increment_offset = 1
auto_increment_increment = 2
relay_log = slave_relay_bin
log-bin = master-bin
log-bin-index = master-bin.index

slave

skip_name_resolve = ON
innodb_file_per_table = ON
server-id = 22
relay_log = slave_relay_bin
auto_increment_offset = 2
auto_increment_increment = 2
log-bin = master-bin
log-bin-index = master-bin.index

• change master to master_host='192.168.43.45',master_port=33066,master_user='slave',master_password='123456',master_log_file='master-bin.000001',master_log_pos=669;