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This article is about how to build a high-availability MySQL-HA in keepalived. The editor thinks it is very practical, so I share it with you to learn. I hope you can get something after reading this article.

The environment topology is as follows

MySQL-VIP:192.168.1.200 MySQL-master1:192.168.1.201 MySQL-master2:192.168.1.202 OS version: CentOS 5.4 MySQL version: 5.0.89 Keepalived version: 1.1.20

I. MySQL master-master configuration

1. Modify MySQL configuration file

If you want to enable the binlog log feature for both MySQL, add the log-bin=MySQL-bin option in the [MySQLd] section of the MySQL configuration file.

The server-ID of two MySQL cannot be the same. By default, the serverID of both MySQL is 1. You need to modify one of them to 2.

2. Set 192.168.1.201 as the primary server of 192.168.1.202

Create a new authorized user on 192.168.1.201

MySQL > grant replication slave on *. * to replication@% identified by replication; Query OK, 0 rows affected (0.00 sec) MySQL > show master status +-+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | +- -- + | MySQL-bin.000003 | 374 | +- -+ 1 row in set (0.00 sec)

Set 192.168.1.201 as your primary server on 192.168.1.202

MySQL > change master to master_host=192.168.1.201,master_user=replication,master_password=replication,master_log_file=MySQL-bin.000003,master_log_pos=374

Query OK, 0 rows affected (0.05 sec)

MySQL > start slave

Query OK, 0 rows affected (0.00 sec)

MySQL > show slave statusG

* * 1. Row *

Slave_IO_State: Waiting for master to send event

Master_Host: 192.168.1.201

Master_User: replication

Master_Port: 3306

Connect_Retry: 60

Master_Log_File: MySQL-bin.000003

Read_Master_Log_Pos: 374

Relay_Log_File: MySQL-master2-relay-bin.000002

Relay_Log_Pos: 235

Relay_Master_Log_File: MySQL-bin.000003

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: 374

& nbsp

The above is how to build a high-availability MySQL-HA in keepalived. The editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.

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