mysql router使用配置

mysql router使用配置

参考资料：

https://www.jianshu.com/p/7fc8d77bea59

一、架构图

介绍：

• MySQL Router是处于应用client和dbserver之间的轻量级代理程序，它能检测，分析和转发查询到后端数据库实例，并把结果返回给client。是mysql-proxy的一个替代品。
• Router实现读写分离，程序不是直接连接数据库IP，而是固定连接到mysql router。MySQL Router对前端应用是透明的。应用程序把MySQL Router当作是普通的mysql实例，把查询发给MySQL Router,而MySQL Router会把查询结果返回给前端的应用程序。
• 从数据库服务器故障，业务可以正常运行。由MySQL Router来进行自动下线不可用服务器。程序配置不需要任何修改。
• 主数据库故障，由MySQL Router来决定主从自动切换，业务可以正常访问。程序配置不需要做任何修改。

二、读写分离原理

MySQL Router接受前端应用程序请求后，根据不同的端口来区分读写，把连接读写端口的所有查询发往主库，把连接只读端口的select查询以轮询方式发往多个从库，从而实现读写分离的目的。读写返回的结果会交给MySQL Router,由MySQL Router返回给客户端的应用程序。

三、实验环境

编号	主机名	IP	角色
1	db_shenji	10.10.81.134	mysql router
2	dba_test_001	10.10.50.60	主库
3	dba_test_002	10.10.117.231	从库

    

 

 

 

 

 

 

 

四、MySQL-Router安装配置

1、主从搭建，此处省略

2、MySQL-Router配置

2.1、下载

[root@db_shenji ~]# cd /data/
[root@db_shenji data]# wget https://dev.mysql.com/get/Downloads/MySQL-Router/mysql-router-8.0.18-linux-glibc2.12-x86_64.tar.xz
[root@db_shenji data]# tar -Jxvf mysql-router-8.0.-linux-glibc2.-x86_64.tar.xz
[root@db_shenji data]# ln -s /data/mysql-router-8.0.-linux-glibc2.-x86_64 /usr/local/mysql-router

2.2、配置

[root@db_shenji data]# mkdir /etc/mysql-route/
[root@db_shenji data]# cp /usr/local/mysql-router/share/doc/mysqlrouter/sample_mysqlrouter.conf /etc/mysql-route/mysqlrouter.conf

修改后完整的内容

[DEFAULT]
# 日志存放目录
logging_folder = /data/log/mysql-route
# 插件存放目录
plugin_folder = /usr/local/mysql-router/lib/mysqlrouter
# 配置文件存放目录
config_folder = /etc/mysql-route
# 运行目录
runtime_folder = /var/run

[logger]
# 日志运行级别
level = debug

# 主节点故障转移配置
[routing:basic_failover]
# 写节点地址
bind_address=10.10.81.134
# 写节点端口
bind_port =
# 模式，读写
mode = read-write
# 主节点地址：默认情况下第一台主数据库为写主库，当第一台主数据库DOWN机后，第二台数据库被提升为主库
destinations = 10.10.50.60:,10.10.117.231:

# 从节点负载均衡配置
[routing:balancing]
# 绑定的IP地址
bind_address=10.10.81.134
# 监听的端口
bind_port =
# 连接超时时间
connect_timeout =
# 最大连接数
max_connections =
# 后端服务器地址
destinations = 10.10.117.231:
# 模式:读还是写
mode = read-only

[keepalive]
interval = 

创建目录

mkdir -p /data/log/mysql-route
chown root:root /data/log/mysql-route/

启动方式

/usr/local/mysql-router/bin/mysqlrouter -c /etc/mysql-route/mysqlrouter.conf &

查看日志

[root@db_shenji ~]# tail -f /data/log/mysql-route/mysqlrouter.log
-- :: main DEBUG [7f48cf782720] Starting all plugins.
-- :: main DEBUG [7f48cc30e700]   plugin 'keepalive:' starting
-- :: main DEBUG [7f48cf782720]   plugin 'logger:' doesn't implement start()
-- :: keepalive INFO [7f48cc30e700] keepalive started with interval
-- :: keepalive INFO [7f48cc30e700] keepalive
-- :: main DEBUG [7f48cb90d700]   plugin 'routing:balancing' starting
-- :: main DEBUG [7f48caf0c700]   plugin 'routing:basic_failover' starting
-- :: main DEBUG [7f48cf782720] Running.
-- :: routing INFO [7f48cb90d700] [routing:balancing] started: listening on 10.10.81.134:, routing strategy = round-robin
-- :: routing INFO [7f48caf0c700] [routing:basic_failover] started: listening on 10.10.81.134:, routing strategy = first-available

登录验证

[root@db_shenji ~]# mysql -h 10.10.81.134 -uw -p'w' -P7001
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is
Server version: 5.6.-84.1-log Source distribution

Copyright (c) , , Oracle and/or its affiliates. All rights reserved.

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 slave status\G;
Empty set (0.00 sec)

ERROR:
No query specified

mysql> 

[root@db_shenji ~]# mysql -h 10.10.81.134 -uw -p'w' -P7002
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 5.6.41-84.1-log Source distribution

Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.

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 slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 10.10.50.60
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000021
          Read_Master_Log_Pos: 3512
               Relay_Log_File: relay-bin.000053
                Relay_Log_Pos: 354
        Relay_Master_Log_File: mysql-bin.000021
             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: 3512
              Relay_Log_Space: 521
              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: 1574144089
                  Master_UUID: 0501f340-0a94-11ea-ad2b-5254007dcbb3
             Master_Info_File: mysql.slave_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: 0501f340-0a94-11ea-ad2b-5254007dcbb3:10-5440876
            Executed_Gtid_Set: 0501f340-0a94-11ea-ad2b-5254007dcbb3:1-5440876,
137347eb-0a94-11ea-ad2b-525400dd43f8:1-531071
                Auto_Position: 0
1 row in set (0.00 sec)

ERROR: 
No query specified

mysql>