Mysql部署MHA高可用

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于 2024-07-02 12:28:55 发布

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文章标签： mysql 数据库

本文链接：https://blog.youkuaiyun.com/w2304948626/article/details/140123569

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部署前准备：

　　mysql-8.0.27下载地址：https://cdn.mysql.com//Downloads/MySQL-8.0/mysql-8.0.27-1.el7.x86_64.rpm-bundle.tar

　　mha-manager下载地址：https://github.com/yoshinorim/mha4mysql-manager/releases/download/v0.58/mha4mysql-manager-0.58-0.el7.centos.noarch.rpm

　　mha-node下载地址：https://github.com/yoshinorim/mha4mysql-node/releases/download/v0.58/mha4mysql-node-0.58-0.el7.centos.noarch.rpm

部署架构：

基本配置

4个节点逐台配置hostname和/etc/hosts文件

安装mysql8

4个节点均创建/data目录，将mysql-8.0.27-1.el7.x86_64.rpm-bundle.tar上传到/data目录下，进行解压安装

我这里使用操作系统镜像制作了本地yum源，用来解决依赖问题，命令见下图

看到如下内容，代表安装完成

配置Mysql异步复制集群

启动hdp2、hdp3、hdp4上的mysql服务，并配置开机自启

1	`systemctl` `enable` `mysqld --now`

连接3个节点的mysql数据库，数据库默认root密码通过查看日志获取

1 2	`cat` `/var/log/mysqld.log \|grep` `password` `...... [Server] A temporary password is generated` `for` `root@localhost: euBcRQk+3tpa`

3个节点数据库修改root用户密码，命令及sql如下

[root@hdp2 data]# mysql -uroot -p

Enter password:

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

Your MySQL connection id is 20

Server version: 8.0.27

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> alter user 'root'@'localhost' identified by '1qaz@WSX123';

Query OK, 0 rows affected (0.01 sec)

mysql> flush privileges;

Query OK, 0 rows affected (0.01 sec)

mysql> exit;

Bye

3个节点配置数据库server_id，以root用户登录mysql进行临时配置，然后将server_id配置在/etc/my.cnf中，防止重启后失效

hdp2

mysql> set global server_id=1;

hdp3

mysql> set global server_id=2;

hdp4

mysql> set global server_id=3;

hdp2

]# echo "server_id=1" >> /etc/my.cnf

hdp3

]# echo "server_id=2" >> /etc/my.cnf

hdp4

]# echo "server_id=3" >> /etc/my.cnf

查看主库hdp2的二进制日志信息

[root@hdp2 data]# mysql -uroot -p

Enter password:

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

Your MySQL connection id is 23

Server version: 8.0.27 MySQL Community Server - GPL

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> show master status;

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

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

| binlog.000003 | 642 | | | |

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

1 row in set (0.00 sec)

mysql>　　

在主库hdp2上建立复制专用用户，并授权

mysql> create user 'repl'@'%' identified with mysql_native_password by '1qaz@WSX123';

Query OK, 0 rows affected (0.01 sec)

mysql> grant replication client,replication slave on *.* to 'repl'@'%';

Query OK, 0 rows affected (0.01 sec)

mysql>　

在从库hdp3和hdp4上创建主库信息

mysql> change master to

-> master_host='192.168.244.151',

-> master_port=3306,

-> master_user='repl',

-> master_password='1qaz@WSX123',

-> master_log_file='binlog.000003', #主库状态显示的File

-> master_log_pos=642; #主库状态显示的Position

Query OK, 0 rows affected, 9 warnings (0.02 sec)

mysql>

在从库启动复制并查看从库状态

mysql> start slave;

Query OK, 0 rows affected, 1 warning (0.01 sec)

mysql> show slave status\G

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

Slave_IO_State: Waiting for source to send event

Master_Host: 192.168.244.151

Master_User: repl

Master_Port: 3306

Connect_Retry: 60

Master_Log_File: binlog.000003

Read_Master_Log_Pos: 1165

Relay_Log_File: hdp3-relay-bin.000002

Relay_Log_Pos: 844

Relay_Master_Log_File: binlog.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: 1165

Relay_Log_Space: 1052

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: 7096d4eb-7378-11ec-8ec4-000c29f7d066

Master_Info_File: mysql.slave_master_info

SQL_Delay: 0

SQL_Remaining_Delay: NULL

Slave_SQL_Running_State: Replica has read all relay log; waiting for more updates

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

Replicate_Rewrite_DB:

Channel_Name:

Master_TLS_Version:

Master_public_key_path:

Get_master_public_key: 0

Network_Namespace:

1 row in set, 1 warning (0.00 sec)

mysql>

配置Mysql半同步复制

在主库加载插件semisync_master.so，从库加载插件semisync_slave.so

hda2

mysql> install plugin rpl_semi_sync_master soname 'semisync_master.so';

Query OK, 0 rows affected, 1 warning (0.01 sec)

hda3

mysql> install plugin rpl_semi_sync_slave soname 'semisync_slave.so';

Query OK, 0 rows affected, 1 warning (0.01 sec)

hda4

mysql> install plugin rpl_semi_sync_slave soname 'semisync_slave.so';

Query OK, 0 rows affected, 1 warning (0.01 sec)

启用半同步复制

hdp2

mysql> set global rpl_semi_sync_master_enabled=1;

Query OK, 0 rows affected (0.00 sec)

hdp3

mysql> set global rpl_semi_sync_slave_enabled=1;

Query OK, 0 rows affected (0.00 sec)

hdp4

mysql> set global rpl_semi_sync_slave_enabled=1;

Query OK, 0 rows affected (0.00 sec)

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