Mysql 主主同步方案
第一台机器主
[root@master ~]# vim /etc/my.cnf
[mysqld]
server-id=1
log-bin=mysql-binlog
log-slave-updates=true
max_binlog_size=1024M
auto_increment_offset = 1
auto_increment_increment = 2
replicate-ignore-db = information_schema
replicate-ignore-db = performance_schema
replicate-ignore-db = test
replicate-ignore-db = mysql
max_connections = 3000
max_connect_errors = 30
skip-character-set-client-handshake
init-connect='SET NAMES utf8'
character-set-server=utf8
wait_timeout=1800
interactive_timeout=1800
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
relay-log=relay-log-bin
relay-log-index=slave-relay-bin.index
[root@master ~]# systemctl restart mariadb
[root@master ~]# mysql
Welcome to the MariaDB monitor. Commands end with ; or g.
Your MariaDB connection id is 4
Server version: 5.5.56-MariaDB MariaDB Server
Copyright (c) 2000, 2017, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
MariaDB [(none)]> grant replication slave on *.* to 'repl'@'192.168.30.24'identified by '123456';
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> flush privileges;
Query OK, 0 rows affected (0.01 sec)
MariaDB [(none)]> show master status;
+---------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+---------------------+----------+--------------+------------------+
| mysql-binlog.000004 | 483 | | |
+---------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
第2台
[root@master1 ~]# vim /etc/my.cnf
[mysqld]
server-id=2
log-bin=mysql-binlog
log-slave-updates=true
max_binlog_size=1024M
auto_increment_offset = 2
auto_increment_increment = 2
replicate-ignore-db = information_schema
replicate-ignore-db = performance_schema
replicate-ignore-db = test
replicate-ignore-db = mysql
max_connections = 3000
max_connect_errors = 30
skip-character-set-client-handshake
init-connect='SET NAMES utf8'
character-set-server=utf8
wait_timeout=1800
interactive_timeout=1800
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
relay-log=relay-log-bin
relay-log-index=slave-relay-bin.index
[root@master1 ~]# systemctl restart mariadb
[root@master1 ~]# mysql
Welcome to the MariaDB monitor. Commands end with ; or g.
Your MariaDB connection id is 4
Server version: 5.5.56-MariaDB MariaDB Server
Copyright (c) 2000, 2017, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
MariaDB [(none)]> grant replication slave on *.* to 'repl'@'192.168.30.25'identified by '123456';
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> flush privileges;
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> show master status;
+---------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+---------------------+----------+--------------+------------------+
| mysql-binlog.000001 | 483 | | |
+---------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
测试环境，可以保证没数据写入，否则需要的步骤是：先masterA锁表-->masterA备份数据-->masterA数据表--> masterB 导入数据--> masterB设置主从-->查看主从
第1台机器
[root@master ~]# mysql -u root
MariaDB [(none)]> stop slave;
MariaDB [(none)]> change master to master_host='192.168.30.24',master_port=3306,master_user='repl',master_password='123456',master_log_file='mysql-binlog.000001',master_log_pos=483;
MariaDB [(none)]> start slave;
MariaDB [(none)]> show slave statusG;
第2台机器
[root@master1 ~]# mysql -u root
MariaDB [(none)]> stop slave;
MariaDB [(none)]> change master to
-> master_host='192.168.30.25',master_port=3306,master_user='repl',master_password='123456',master_log_file='mysql-binlog.000004',master_log_pos=483;
MariaDB [(none)]> start slave;
MariaDB [(none)]> show slave statusG;
第一台机器
MariaDB [(none)]> create database test01;
第二台机器查看是否同步
MariaDB [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sampdb |
| test |
| test01 |
+--------------------+
第二台机器
MariaDB [(none)]> create database test02;
查看第一台机器
MariaDB [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sampdb |
| test |
| test01 |
| test02 |
+--------------------+
7 rows in set (0.00 sec)