MySQL8.0.18配置多主一从

[mysqld]
# 服务器标识符, 确保每台服务器标识符都不一样
server-id = 1000

# master 机必须开启 log_bin
# mysql-bin 为自定义名字，会生成诸如 mysql-bin.index、mysql-bin.000001 等文件
log_bin=mysql-bin

# 二进制日志过期时间（单位：天），默认值为 0，即不过期
expire_logs_days = 0

# 错误日志
log-error=/var/lib/mysql/mysql-error.log

# 单个 log_bin 文件最大值，达到最大值之后新建文件后缀自增，如 mysql-bin.000002
max_binlog_size = 100M

# mysql 安装路径
basedir=/var/lib/mysql

# mysql 数据路径
datadir=/var/lib/mysql

# master 记录操作的数据库
binlog_do_db=replication

# master 忽略的数据库
binlog_ignore_db=information_schema
binlog_ignore_db=performance_schema
binlog_ignore_db=sys
binlog_ignore_db=mysql

# 二进制日志保存模式
binlog_format=MIXED

# blob 类型的最大存储值（单位：字节、B）
# 1048576 B = 1MB
max_allowed_packet=1048576


# 密码复杂度配置，需要插件
# 密码长度至少为 0
# validate_password_length=8

# 大小写同时存在的最少数目
# validate_password_mixed_case_count=1

# 密码至少存在的数字数目
# validate_password_number_count=1

# 密码至少存在的特殊字符数目
# validate_password_special_char_count=1

innodb_flush_log_at_trx_commit=0

[mysql]
default-character-set=utf8mb4

[client]
default-character-set=utf8mb4

create user 'replication'@'%' identified with mysql_native_password by 'JINGhuaSHUIyue123,.';

drop user 'replication'@'%';

alter user 'replication'@'%' identified with mysql_native_password by 'JINGhuaSHUIyue123,.';

grant replication slave on *.* to 'replication'@'%';

flush privileges;

[mysqld]
# 服务器标识符, 确保每台服务器标识符都不一样
server-id = 2000

# mysql 安装路径
basedir=D:\mysql

# mysql 数据路径
datadir=D:\mysql\data

# slave 复制的数据库
replicate_do_db=test

# slave 忽略的数据库
replicate_ignore_db=information_schema
replicate_ignore_db=performance_schema
replicate_ignore_db=mysql
replicate_ignore_db=sys

# slave 网络超时重连间隔（单位：秒）
slave_net_timeout=60

[mysql]

default-character-set=utf8

[client]

default-character-set=utf8

show master status;

+------------------+----------+--------------+-------------------------------------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB                                | Executed_Gtid_Set |
+------------------+----------+--------------+-------------------------------------------------+-------------------+
| mysql-bin.000006 |      155 | test         | information_schema,performance_schema,sys,mysql |                   |
+------------------+----------+--------------+-------------------------------------------------+-------------------+

show master status;

+------------------+----------+--------------+-------------------------------------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB                                | Executed_Gtid_Set |
+------------------+----------+--------------+-------------------------------------------------+-------------------+
| mysql-bin.000005 |      155 | test         | information_schema,performance_schema,sys,mysql |                   |
+------------------+----------+--------------+-------------------------------------------------+-------------------+

show slave status\G;

stop slave;

reset slave all;

change master to
master_host = '112.124.1.100',
master_user = 'replication',
master_port = 3306,
master_password = 'replication',
master_log_file = 'mysql-bin.000006',
master_log_pos = 155,
master_connect_retry = 15,
master_retry_count = 0
for channel 'master1';

change master to
master_host = '192.168.1.139',
master_user = 'replication',
master_port = 3306,
master_password = 'JINGhuaSHUIyue123,.',
master_log_file = 'mysql-bin.000005',
master_log_pos = 155,
master_connect_retry = 15,
master_retry_count = 0
for channel 'master2';

start slave for channel 'master1';
start slave for channel 'master2';

show slave status\G;