### Mysql 高可用

Mysql 高可用采用雙主方案；

1. 兩個 mysql節點，分別安裝在 192.168.1.247, 192.168.1.248；

2. 準備\_Mysql01節點 修改配置文件，添加授權用戶

2.1 修改mysql的配置文件，并重啟mysql

```bash

...

[mysqld]

...

#bind-address = 127.0.0.1

log-bin=mysql-bin

log-bin-index=mysql-bin.index

server-id = 1

...

```

2.2 添加遠程復制用戶

```mysql

mysql> grant replication slave on *.* to ‘slave‘@‘%‘ identified by ‘boxfish‘;

Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

mysql> exit

```

3. 準備\_Mysql02節點 修改配置文件，添加授權用戶

3.1 修改mysql的配置文件，并重啟mysql

```bash

...

[mysqld]

...

#bind-address = 127.0.0.1

log-bin=mysql-bin

log-bin-index=mysql-bin.index

server-id = 2

...

```

3.2 添加遠程復制用戶

```mysql

mysql> grant replication slave on *.* to ‘slave‘@‘%‘ identified by ‘boxfish‘;

Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

mysql> exit

```

4. 操作\_Mysql01節點

4.1 查看master status

```bash

mysql> show master status;

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

| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |

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

| mysql-bin.000013 | 1648933 | | | |

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

1 row in set (0.00 sec)

```

！！！請記住 “File” 和 “Position” 內容稍后會用到！！！

4.2 鎖表

```bash

FLUSH TABLES WITH READ LOCK;

```

4.3 數據導出

```bash

root@ubuntu-server03:~# mysqldump -uroot -pxxx gitlabhq_production > gitlabhq_production.dump

```

4.4 解鎖

```bash

UNLOCK TABLES;

```

4.5 拷貝導出文件到Mysql02

```bash

scp gitlabhq_production.dump 192.168.1.248:/tmp/

```

5. 操作\_Mysql02節點

5.1 還原數據

```bash

mysql -uroot -p gitlabhq_production < /tmp/gitlabhq_production.dump

```

5.2 配置Mysql01 節點為主節點

```bash

mysql> change master to master_host=‘192.168.1.247’,

master_user=‘slave‘,

master_password=‘boxfish‘,

master_log_file=‘mysql-bin.000013‘,

master_log_pos=1648933;

Query OK, 0 rows affected, 2 warnings (0.01 sec)

mysql>start slave;

```

5.3 查看狀態

```bash

mysql> show slave status \G

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

Slave_IO_State: Waiting for master to send event

Master_Host: 192.168.1.247

Master_User: slave

Master_Port: 3306

Connect_Retry: 60

Master_Log_File: mysql-bin.000013

Read_Master_Log_Pos: 1866414

Relay_Log_File: mysql-relay-bin.000018

Relay_Log_Pos: 1866577

Relay_Master_Log_File: mysql-bin.000013

Slave_IO_Running: Yes

Slave_SQL_Running: Yes

Replicate_Do_DB:

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: 1866414

Relay_Log_Space: 1866797

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: 2

Master_UUID: 0386913e-c1ce-11e6-82a0-3ca82a1de578

Master_Info_File: /var/lib/mysql/master.info

SQL_Delay: 0

SQL_Remaining_Delay: NULL

Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it

Master_Retry_Count: 86400

Master_Bind:

Last_IO_Error_Timestamp:

Last_SQL_Error_Timestamp:

Master_SSL_Crl:

Master_SSL_Crlpath:

Retrieved_Gtid_Set:

Executed_Gtid_Set:

Auto_Position: 0

1 row in set (0.00 sec)

mysql>

```

Slave\_IO\_Running: Yes

Slave\_SQL\_Running: Yes

這兩個參數都是Yes 代表成功！

5.4 查看自己的 master status !

```bash

mysql> show master status\g

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

| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |

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

| mysql-bin.000010 | c | | | |

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

1 row in set (0.00 sec)

```

！！！記住“File”，“Position” 內容！！！

6. 操作Mysql01節點

6.1 配置連接到 mysql01 為 master

```bash

mysql> change master to master_host=‘192.168.1.248‘,

master_user=‘slave‘,

master_password=‘boxfish‘,

master_log_file=‘mysql-bin.000010‘,

master_log_pos=1958047;

Query OK, 0 rows affected, 2 warnings (0.01 sec)

mysql> start slave;

```

6.2 查看鏈接狀態

```bash

mysql> SHOW SLAVE STATUS\G

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

Slave_IO_State: Waiting for master to send event

Master_Host: 192.168.1.248

Master_User: slave

Master_Port: 3306

Connect_Retry: 60

Master_Log_File: mysql-bin.000010

Read_Master_Log_Pos: 1958047

Relay_Log_File: mysql-relay-bin.000011

Relay_Log_Pos: 236

Relay_Master_Log_File: mysql-bin.000010

Slave_IO_Running: Yes

Slave_SQL_Running: Yes

Replicate_Do_DB:

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: 1958047

Relay_Log_Space: 155297

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: 1

Master_UUID: 44b90af8-41c7-11e6-bfc9-5cb901fe49a4

Master_Info_File: /var/lib/mysql/master.info

SQL_Delay: 0

SQL_Remaining_Delay: NULL

Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it

Master_Retry_Count: 86400

Master_Bind:

Last_IO_Error_Timestamp:

Last_SQL_Error_Timestamp:

Master_SSL_Crl:

Master_SSL_Crlpath:

Retrieved_Gtid_Set:

Executed_Gtid_Set:

Auto_Position: 0

1 row in set (0.00 sec)

```

Slave\_IO\_Running: Yes

Slave\_SQL\_Running: Yes

這兩個參數都是Yes 代表成功！

7. 一個錯誤

```bash

Last_IO_Error: Got fatal error 1236 from master when reading data from binary log: ‘Could not find first log file name in binary log index file‘

```

重新在主上面查看maste status ，然后鎖表，導出數據，將數據拷貝到slave并導入，修改slave參數，解鎖master 表，在次啟動slave；

gitlab-mysql_高可用

標簽：row???until???參數???res???添加???內容???lock???配置連接???user

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本文系統來源：https://www.cnblogs.com/jin-yuana/p/9791896.html

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