MySQL主主配置

在虛擬機器192.168.1.181和192.168.1.182上的兩套zabbix環境，根據搭建的兩個環境在上面進行資料庫主主配置，為keepalive做準備。

一、目標端drop庫

# 目標端drop庫

[email protected]g-slave:~$ mysql -uzabbix -p

Enter password:

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 303

Server version:5.5.47-0ubuntu0.14.04.1 (Ubuntu)

Copyright (c) 2000, 2015, Oracleand/or its affiliates. All rights reserved.

Oracle is a registered trademarkof Oracle Corporation and/or its

affiliates. Other names may betrademarks of their respective

owners.

Type 'help;' or '\h'forhelp. Type '\c' to clearthe current input statement.

mysql> showdatabases

;

+--------------------+

|Database           |

+--------------------+

|information_schema |

| zabbix             |

+--------------------+

2 rows inset (0.00sec)

mysql> dropzabbix

   ->;

ERROR 1064 (42000): You have anerror in your SQL syntax; check themanual that corresponds to your MySQL server version

for the rightsyntax to use near 'zabbix' at line 1

mysql> dropdatabase zabbix

   ->;

Query OK, 113 rows affected (5.57sec)

mysql> showdatabases;

+--------------------+

|Database           |

+--------------------+

|information_schema |

+--------------------+

1 row inset (0.00sec)

# 然後新建一個同名字的庫

mysql> createdatabase zabbix character set utf8 collateutf8_bin;

二、跨主機備份

將192.168.1.181上的庫複製到192.168.1.182上。

# 授權

[email protected]:~$ grantall privileges on zabbix.* to [email protected] by 'zabbix';

#庫和庫之間的複製，目標端庫必須先建立，源端有向目標端讀寫的許可權

[email protected]:~$ mysqldump--host=localhost -uzabbix -pzabbix --opt zabbix | mysql--host=192.168.1.182 -uzabbix -pzabbix -C zabbix

三、修改MySQL配置

#檢視預設配置檔案

mysql --verbose --help  | grep -A 1 "Defaultoptions"

#

#修改配置在[mysqld]配置區中加入如下配置。

#

#########################181

[mysqld]

server-id = 11

log-bin = mysql-bin

auto-increment-increment = 2

auto-increment-offset = 1

relay-log=mysql-relay           

relay-log-index=mysql-relay.index

binlog-do-db=zabbix

replicate-do-db=zabbix

#建立複製使用者

mysql> CREATEUSER 'repluser'@'192.168.1.182'IDENTIFIED BY 'zabbix';

Query OK, 0 rows affected (0.06sec)

mysql> GRANTREPLICATION SLAVE,REPLICATION CLIENT ON *.* TO 'repluser'@'192.168.1.182'IDENTIFIED BY 'zabbix';

Query OK, 0 rows affected (0.01sec)

mysql> flushprivileges;

Query OK, 0 rows affected (0.02sec)

################182

server-id = 12

log-bin = mysql-bin

auto-increment-increment = 2

auto-increment-offset = 2

relay-log=mysql-relay           

relay-log-index=mysql-relay.index

#建立複製使用者

[email protected]:/etc$mysql -uroot -p

Enter password:

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 2842

Server version:5.5.47-0ubuntu0.14.04.1 (Ubuntu)

Copyright (c) 2000, 2015, Oracleand/or its affiliates. All rights reserved.

Oracle is a registered trademarkof Oracle Corporation and/or its

affiliates. Other names may betrademarks of their respective

owners.

Type 'help;' or '\h'forhelp. Type '\c' to clearthe current input statement.

mysql> CREATEUSER 'repluser'@'192.168.1.181'IDENTIFIED BY 'zabbix';

Query OK, 0 rows affected (0.07sec)

mysql> GRANTREPLICATION SLAVE, REPLICATION CLIENT ON *.* TO 'repluser'@'192.168.1.181'IDENTIFIED BY 'zabbix';

Query OK, 0 rows affected (0.01sec)

mysql> flushprivileges;

Query OK, 0 rows affected (0.01sec)

mysql>

四、重啟mysql(雙機都操作)，使修改的配置生效

cd /etc/init.d

./mysql restart

五、配置雙主

# 在192.168.1.181檢視mater status

mysql> showmaster status;

+--------------+----------+--------------+------------------+

| File         | Position |Binlog_Do_DB | Binlog_Ignore_DB |

+--------------+----------+--------------+------------------+

| mysql.000001|     107 |||

+--------------+----------+--------------+------------------+

1 row inset (0.00sec)

mysql>

#在192.168.1.182上配置

mysql> changemaster to \

   -> master_host='192.168.1.181',

   -> master_user='repluser',

   -> master_password='zabbix',

   -> master_log_file='mysql.000001',

   -> master_log_pos=107;

Query OK, 0 rows affected (0.27sec)

mysql> commit;

Query OK, 0 rows affected (0.00sec)

mysql>

同理在181上進行配置。步驟省略...

六、驗證

## 檢視181是否都全部同步182的

#檢視182的bin日誌

mysql> showmaster status \G

*************************** 1. row ***************************

            File: mysql.000008

        Position: 4929

   Binlog_Do_DB: zabbix

Binlog_Ignore_DB:

1 row inset (0.00sec)

mysql> showmaster status ;

+--------------+----------+--------------+------------------+

| File         | Position |Binlog_Do_DB | Binlog_Ignore_DB |

+--------------+----------+--------------+------------------+

| mysql.000008|    4929 | zabbix       ||

+--------------+----------+--------------+------------------+

1 row inset (0.00sec)

mysql>

#檢視181的slave 狀態，狀態正常

mysql> showslave status \G

*************************** 1. row ***************************

               Slave_IO_State: Waiting for master tosend event

                  Master_Host: 192.168.1.182

                  Master_User: repluser

                  Master_Port: 3306

                Connect_Retry: 60

              Master_Log_File: mysql.000008

          Read_Master_Log_Pos: 4929

               Relay_Log_File:mysql-relay.000009

                Relay_Log_Pos: 249

        Relay_Master_Log_File: mysql.000008

             Slave_IO_Running: Yes

            Slave_SQL_Running: Yes

              Replicate_Do_DB: zabbix

          Replicate_Ignore_DB:

           Replicate_Do_Table:

       Replicate_Ignore_Table:

      Replicate_Wild_Do_Table:

 Replicate_Wild_Ignore_Table:

                   Last_Errno: 0

                   Last_Error:

                 Skip_Counter: 1

          Exec_Master_Log_Pos: 4929

              Relay_Log_Space: 543

              Until_Condition: None

               Until_Log_File:

                Until_Log_Pos: 0

           Master_SSL_Allowed: No

           Master_SSL_CA_File:

           Master_SSL_CA_Path:

              Master_SSL_Cert:

            Master_SSL_Cipher:

               Master_SSL_Key:

        Seconds_Behind_Master: 0

Master_SSL_Verify_Server_Cert: No

                Last_IO_Errno: 0

                Last_IO_Error:

               Last_SQL_Errno: 0

               Last_SQL_Error:

 Replicate_Ignore_Server_Ids:

             Master_Server_Id: 12

1 row inset (0.00sec)

mysql>

## 檢視182是否都全部同步181的

#在181上看狀態

mysql> showmaster status;

+--------------+----------+--------------+------------------+

| File         | Position |Binlog_Do_DB | Binlog_Ignore_DB |

+--------------+----------+--------------+------------------+

| mysql.000003|     107 | zabbix       ||

+--------------+----------+--------------+------------------+

1 row inset (0.00sec)

mysql>

#看下182的slave

mysql> showslave status \G

*************************** 1. row ***************************

               Slave_IO_State: Waiting for master tosend event

                  Master_Host: 192.168.1.181

                  Master_User: repluser

                  Master_Port: 3306

                Connect_Retry: 60

              Master_Log_File: mysql.000003

          Read_Master_Log_Pos: 107

               Relay_Log_File:mysql-relay.000005

                Relay_Log_Pos: 249

        Relay_Master_Log_File: mysql.000003

             Slave_IO_Running: Yes

            Slave_SQL_Running: Yes

              Replicate_Do_DB: zabbix

          Replicate_Ignore_DB:

           Replicate_Do_Table:

       Replicate_Ignore_Table:

      Replicate_Wild_Do_Table:

 Replicate_Wild_Ignore_Table:

                   Last_Errno: 0

                   Last_Error:

                 Skip_Counter: 0

          Exec_Master_Log_Pos: 107

              Relay_Log_Space: 543

              Until_Condition: None

               Until_Log_File:

                Until_Log_Pos: 0

           Master_SSL_Allowed: No

           Master_SSL_CA_File:

           Master_SSL_CA_Path:

              Master_SSL_Cert:

            Master_SSL_Cipher:

               Master_SSL_Key:

        Seconds_Behind_Master: 0

Master_SSL_Verify_Server_Cert: No

                Last_IO_Errno: 0

                Last_IO_Error:

               Last_SQL_Errno: 0

               Last_SQL_Error:

 Replicate_Ignore_Server_Ids:

             Master_Server_Id: 11

1 row inset (0.00sec)

mysql>

以上狀態均正常

七、問題處理

（1）MySQL配置檔案繫結127.0.0.1導致3306埠無法對外暴漏

發現在181可以和182 的埠通訊，但是182不能telnet 到181，在181的mysql配置檔案裡面檢視是綁定了127.0.0.1 的地址，改成本機ip即可

#

# Instead of skip-networking thedefault is now to listen only on

# localhost which is morecompatible and is not less secure.

#bind-address           = 127.0.0.1

bind-address            = 192.168.1.181

（2）跳過複製錯誤問題

剛開始配置的時候182上有一個walle庫，因為181上沒有建立此庫導致同步錯誤，用如下sql命令跳過複製錯誤。

#遇到主從複製出錯誤的情況

stop slave;

set globalsql_slave_skip_counter=1 ;

start slave;

八、其他補充

#撤銷主從複製或者主主複製功能

stop slave;

reset slave all;