MySQL一主一从搭建详细讲解(附图文)

systemctl stop firewalld
systemctl disable firewalld

firewall-cmd --zone=public --add-port=3306/tcp-permanent
firewall-cmd --reload

#mysql 服务ID，保证整个集群环境中唯一，取值范围：1 – 232-1，默认为1
server-id=1
#是否只读,1 代表只读, 0 代表读写
read-only=0
#忽略的数据, 指不需要同步的数据库
#binlog-ignore-db=mysql
#指定同步的数据库
#binlog-do-db=db01

systemctl restart mysqld

#创建itcast用户，并设置密码，该用户可在任意主机连接该MySQL服务
create user 'itcast'@'%' IDENTIFIED WITH mysql_native_password BY 'Itcast@123456';
#为 'itcast'@'%' 用户分配主从复制权限
GRANT REPLICATION SLAVE ON *.* TO 'itcast'@'%';

show master status;

#mysql 服务ID，保证整个集群环境中唯一，取值范围：1 – 2^32-1，和主库不一样即可
server-id=2
#是否只读,1 代表只读, 0 代表读写
read-only=1

systemctl restart mysqld

 CHANGE REPLICATION SOURCE TO SOURCE_HOST='192.168.116.129', SOURCE_USER='itcast', 
SOURCE_PASSWORD='Itcast@123456', SOURCE_LOG_FILE='binlog.000006', 
SOURCE_LOG_POS=370;

CHANGE MASTER TO MASTER_HOST='192.168.116.129', MASTER_USER='itcast', 
MASTER_PASSWORD='Itcast@123456', MASTER_LOG_FILE='binlog.000006', 
MASTER_LOG_POS=370;

start replica ; #8.0.22之后
start  slave ;  #8.0.22之前

show replica  status ;  #8.0.22之后
show  slave  status ;   #8.0.22之前

 create database itdemo3;
 use itdemo3;
 create table tb_user(
 id int(11) primary key not null auto_increment,
 name varchar(50) not null,
 sex varchar(1)
 );
  insert into tb_user(id,name,sex) values(null,'Tom', '1'),(null,'Trigger','0'),
 (null,'Dawn','1');

STOP SLAVE;
RESET SLAVE ALL;