MariaDB主主复制测试

时间 2019-11-08

标签 mariadb 复制测试繁體版

原文原文链接

环境：

192.168.205.17: as master server
192.168.205.27: as middle server

版本：

OS: centos 7 1810 with mini install
mariadb-5.5.60

目地：

测试主主复制，两个主机互为主，为了解决记录冲突，能够将主键设成起始设置为不一样（如1，3，5，另外一个2，4，6），增加设置为相同为2，这样主键不冲突就能够实现复制，但仍是没法实现建表建库相同的冲突。mysql

步骤：

1. 配置主服务器
2. 配置第二个主服务器
3. 测试

装服务器

安装两台服务器

[root@master1 ~]#yum install mariadb-server
[root@master1 ~]#mkdir /data/{mysql,logs}   
[root@master1 ~]#chown mysql:mysql /data/{mysql,logs}

master1服务器配置

修改master1服务，并启动服务

[root@master1 ~]#vi /etc/my.cnf                                  
[mysqld]
server-id=17                                                                                                     
datadir=/data/mysql
log-bin=/data/logs/bin
auto_increment_offset=1
auto_increment_increment=2
[root@master1 ~]#systemctl start mariadb

初始化数据，测试使用，并建立复制账号

[root@master1 ~]#mysql < hellodb_innodb.sql
MariaDB [(none)]> grant replication slave on *.* to repluser@'192.168.205.%' identified by 'centos';

备份数据库，并复制文件到maseter2

[root@master1 ~]#mysqldump -A --single-transaction --master-data=1 > /data/all.sql
[root@master1 ~]#scp /data/all.sql 192.168.205.27:/data/

master2服务器配置

修改配置文件

[root@master2 ~]#vi /etc/my.cnf         
[mysqld]
server-id=27
datadir=/data/mysql
log-bin=/data/logs/bin
auto_increment_offset=2
auto_increment_increment=2     
[root@master2 ~]#systemctl start mariadb

修改备份数据，添加change master to 信息，位置是备份的，因此不用修改

[root@master2 ~]#vi /data/all.sql 
CHANGE MASTER TO
MASTER_HOST='192.168.205.17',
MASTER_USER='repluser',
MASTER_PASSWORD='centos',
MASTER_PORT=3306,
[root@master2 ~]#mysql < /data/all.sql

启动线程并查看复制状态

MariaDB [(none)]> start slave;
MariaDB [(none)]> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.205.17
                  Master_User: repluser
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: bin.000003
          Read_Master_Log_Pos: 8988
               Relay_Log_File: mariadb-relay-bin.000003
                Relay_Log_Pos: 523
        Relay_Master_Log_File: bin.000003
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes

在master2记录复制的位置信息，在master1上也要同步

MariaDB [(none)]> show master logs;  
+------------+-----------+
| Log_name   | File_size |
+------------+-----------+
| bin.000001 |     30833 |
| bin.000002 |   1069459 |
| bin.000003 |    522771 |
+------------+-----------+
3 rows in set (0.00 sec)

在master1配置同步master2

在master1中修改change master to, 查起动slave，查看状态

MariaDB [(none)]> CHANGE MASTER TO  MASTER_HOST='192.168.205.27',  MASTER_USER='repluser',  MASTER_PASSWORD='centos',  MASTER_PORT=3306, MASTER_LOG_FILE='bin.000003',  MASTER_LOG_POS=522771;
MariaDB [(none)]> start slave;
MariaDB [(none)]> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.205.27
                  Master_User: repluser
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: bin.000003
          Read_Master_Log_Pos: 523513
               Relay_Log_File: mariadb-relay-bin.000003
                Relay_Log_Pos: 523
        Relay_Master_Log_File: bin.000003
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes

测试如下操做同时在两台服务器上

两个服务器中同时执行以下命令

MariaDB [(none)]> user hellodb;
MariaDB [(none)]> create table test (id int auto_increment primary key, name char(10));
MariaDB [(none)]> desc test;
MariaDB [(none)]> insert test (name) values ("leo")

能够看到两个服务器都能插入成功，复制没有出错，一个id为1一个id为2
MariaDB [hellodb]> select * from test;
+----+------+
| id | name |
+----+------+
| 1 | leo |
| 2 | leo |
+----+------+
2 rows in set (0.00 sec)

同时插入两条记录，显示成功，同步状态无错误

MariaDB [hellodb]> insert test (name) values('zhao'),('song');
MariaDB [hellodb]> select * from test;
+----+------+
| id | name |
+----+------+
|  1 | leo  |
|  2 | leo  |
|  3 | zhao |
|  4 | zhao |
|  5 | song |
|  6 | song |
+----+------+
6 rows in set (0.00 sec)

咱们来个新表试试，同时执行建立表，显示成功，但查看复制状态

MariaDB [hellodb]> create bable test2(id int);
MariaDB [hellodb]> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.205.27
                  Master_User: repluser
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: bin.000003
          Read_Master_Log_Pos: 523513
               Relay_Log_File: mariadb-relay-bin.000002
                Relay_Log_Pos: 1168
        Relay_Master_Log_File: bin.000003
             Slave_IO_Running: Yes
            Slave_SQL_Running: No
                           Last_Errno: 1050
                   Last_Error: Error 'Table 'test2' already exists' on query. Default database: 'hellodb'. Query: 'create table test2(id int)'

设置跳过错误，中止再启动slave，成功复制

MariaDB [hellodb]> set global sql_slave_skip_counter=1;
MariaDB [hellodb]> stop slave;
MariaDB [hellodb]> start slave;
MariaDB [(none)]> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.205.27
                  Master_User: repluser
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: bin.000003
          Read_Master_Log_Pos: 523513
               Relay_Log_File: mariadb-relay-bin.000003
                Relay_Log_Pos: 523
        Relay_Master_Log_File: bin.000003
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes