Prepare two machines:
Main: 172.19.59.50
From: 172.19.59.47
Both the master and the slave have installed the mysql server, and the version numbers are the same.
Let's operate the master node first:
1. Log in to the root account of the master node, and then grant permissions to the slave node (if there are multiple plex machines, execute multiple times)
mysql>GRANT REPLICATION SLAVE ON *.* TO 'backup'@'172.19.59.47' IDENTIFIED BY '123456’;
2. Modify the master node configuration file:
vi /etc/my.cnf
[mysqld]
#Add the following configuration after [mysqld]
server-id=1 #represents the master node id, guaranteed to be unique
log-bin=mysql-bin #Open binary log file
binlog-do-db=test #Database nodes that need to be synchronized, write multiple lines if there are multiple
binlog-ignore-db=mysql #Do not need to synchronize database nodes, write multiple lines if there are multiple
Then operate the slave node:
1. Log in to the slave node root account and add the master node information:
change master to master_host='172.19.59.50',master_user='test',master_password='123456',master_log_file='mysql-bin.000005',master_log_pos=120;
2. Modify the mysql configuration file
vi /etc/my.cnf
[mysqld]
#Add the following configuration after [mysqld]
server-id=2 #represents the slave node id, guaranteed to be unique
log-bin=mysql-bin #Open binary log file
replicate-do-db=test #Database nodes that need to be synchronized, write multiple rows if there are multiple
replicate-ignore-db=mysql #Do not need to synchronize database nodes, write multiple rows if there are multiple
#Note the difference between the last two lines and the master node.
#In addition, in order to prevent errors during master-slave synchronization, the following configuration can be added:
slave-skip-errors=1062,1053 #1062 error refers to some primary key duplicate errors
slave-skip-errors=all #忽略所有错误
slave-skip-errors=ddl_exist_errors #忽略DDL错吴
#注意 slave-skip-errors 的配置一定要放在[mysqld] 下面。
以上配置操作完成之后，分别执行以下命令重启主节点和从节点。
service mysqld restart
重启完成之后，查看主从节点的状态：
在主机中，mysql>show master status;
在从机中，mysql>show slave status\G;
如果以下显示YES，
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
并且下面这2项和主节点的一致，表示主从配置正确
Master_Log_File: mysql-bin.000003
Read_Master_Log_Pos: 460
以上表示mysql主从配置成功，下面可以验证一下。
在主节点上创建一个测试表test，然后添加一条数据，看从节点上是否能收到。