MariaDB主主複製測試

時間 2019-11-08

標籤 mariadb 複製測試简体版

原文原文鏈接

環境：

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：

測試主主複製，兩個主機互爲主，爲了解決記錄衝突，能夠將主鍵設成起始設置爲不一樣（如1，3，5，另外一個2，4，6），增加設置爲相同爲2，這樣主鍵不衝突就能夠實現複製，但仍是沒法實現建表建庫相同的衝突。mysql

步驟：

1. 配置主服務器
2. 配置第二個主服務器
3. 測試

裝服務器

安裝兩臺服務器

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

master1服務器配置

修改master1服務，並啓動服務

[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

初始化數據，測試使用，並建立複製賬號

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

備份數據庫，並複製文件到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服務器配置

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

修改備份數據，添加change master to 信息，位置是備份的，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

啓動線程並查看複製狀態

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記錄複製的位置信息，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, 查起動slave，查看狀態

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

測試如下操做同時在兩臺服務器上

兩個服務器中同時執行以下命令

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")

能夠看到兩個服務器都能插入成功，複製沒有出錯，一個id爲1一個id爲2
MariaDB [hellodb]> select * from test;
+----+------+
| id | name |
+----+------+
| 1 | leo |
| 2 | leo |
+----+------+
2 rows in set (0.00 sec)

同時插入兩條記錄，顯示成功，同步狀態無錯誤

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)

咱們來個新表試試，同時執行建立表，顯示成功，但查看複製狀態

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)'

設置跳過錯誤，中止再啓動slave，成功複製

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

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