使用实例管理器轻松管理多个MySQL实例 （1）

  来源：赛迪网    作者：Algernon

一、MySQL数据库的实例管理器概述：

1、MySQL数据库的实例管理器(IM)是通过TCP/IP端口运行的后台程序，用来监视和管理MySQL数据库服务器实例。

2、假如IM挂了，则所有的实例都会挂掉；假如实例挂了，IM会尝试重新来启动它。

3、IM读取配置文件比如MY.CNF的[manager]段。

4、本文中的示例依据LINUX环境下试验。

二、配置说明:

1、配置文件如下：

[manager]

user=mysql

default-mysqld-path = /usr/local/mysql/bin/mysqld

socket=/tmp/manager.sock

pid-file=/tmp/manager.pid

password-file = /etc/mysqlmanager.passwd

monitoring-interval = 2

port = 1999

bind-address = 192.168.0.231

log = /usr/local/mysql/bin/mysqlmanager.log

run-as-service = true

[mysqld1]

...

[mysqld2]

...

这个有两个配置实例，具体就不说了。见我的安装多个实例的文章。

具体含义查看mysqlmanager --help

2、密码文件

IM将用户信息保存到密码文件中。密码文件的默认位置为/etc/mysqlmanager.passwd。

密码应类似于：

petr:*35110DC9B4D8140F5DE667E28C72DD2597B5C848

我的mysqlmanager.passwd内容

user_all:*6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9

3、启动IM

[root@localhost tmp]# /usr/local/mysql/bin/mysqlmanager

WARNING: This program is deprecated and will be removed in 6.0.

[2483/3086632640] [08/04/24 14:24:50] [INFO] IM: started.

[2483/3086632640] [08/04/24 14:24:50] [INFO] Loading config file 'my.cnf'...

[2483/3086632640] [08/04/24 14:24:50] [INFO] Manager: initializing...

[2483/3086632640] [08/04/24 14:24:50] [INFO] Manager: detected threads model: POSIX threads.

[2483/3086632640] [08/04/24 14:24:50] [INFO] Loading the password database...

[2483/3086632640] [08/04/24 14:24:50] [INFO] Loaded user 'user_all'.

[2483/3086632640] [08/04/24 14:24:50] [INFO] The password database loaded successfully.

[2483/3086632640] [08/04/24 14:24:50] [INFO] Manager: pid file (/tmp/manager.pid) created.

[2483/3086632640] [08/04/24 14:24:50] [INFO] mysqld instance 'mysqld1' has been added successfully.

[2483/3086632640] [08/04/24 14:24:50] [INFO] mysqld instance 'mysqld2' has been added successfully.

[2483/3076139920] [08/04/24 14:24:50] [INFO] Guardian: started.

[2483/3076139920] [08/04/24 14:24:50] [INFO] Guardian: starting 'mysqld1'...

[2483/3076058000] [08/04/24 14:24:50] [INFO] Instance 'mysqld1': Monitor: started.

[2483/3076058000] [08/04/24 14:24:50] [INFO] Instance 'mysqld1': Monitor: starting mysqld...

[2483/3076139920] [08/04/24 14:24:50] [INFO] Guardian: starting 'mysqld2'...

[2483/3076058000] [08/04/24 14:24:50] [INFO] Instance 'mysqld1': Monitor: waiting for mysqld to stop...

[2483/3075894160] [08/04/24 14:24:50] [INFO] Instance 'mysqld2': Monitor: started.

[2483/3075894160] [08/04/24 14:24:50] [INFO] Instance 'mysqld2': Monitor: starting mysqld...

[2483/3075894160] [08/04/24 14:24:50] [INFO] Instance 'mysqld2': Monitor: waiting for mysqld to stop...

[2483/3086632640] [08/04/24 14:24:50] [INFO] Manager: started.

[2483/3075976080] [08/04/24 14:24:50] [INFO] Listener: started.

[2483/3075976080] [08/04/24 14:24:50] [INFO] Listener: accepting connections on ip socket (port: 1999)...

[2483/3075976080] [08/04/24 14:24:50] [INFO] Listener: accepting connections on unix socket '/tmp/manager.sock'...

...

InnoDB: than specified in the .cnf file 0 5242880 bytes!

080424 14:24:50 InnoDB: Started; log sequence number 0 46409

080424 14:24:50 [Note] Event Scheduler: Loaded 0 events

080424 14:24:50 [Note] /usr/local/mysql/bin/mysqld: ready for connections.

Version: '5.1.23a-maria-alpha-log' socket: '/tmp/mysql1.sock' port: 3306 MySQL Community Server [Maria] (GPL)

080424 14:24:50 [Warning] 'user' entry '[e-mail]' ignored in --skip-name-resolve mode.

080424 14:24:50 [Warning] 'user' entry '@localhost.localdomain' ignored in --skip-name-resolve mode.

080424 14:24:50 [Note] Event Scheduler: Loaded 0 events

080424 14:24:50 [Note] /usr/local/mysql/bin/mysqld: ready for connections.

Version: '5.1.23a-maria-alpha-log' socket: '/tmp/mysql2.sock' port: 3309 MySQL Community Server [Maria] (GPL)

[2483/3076139920] [08/04/24 14:24:52] [INFO] Guardian: 'mysqld1' is running, set state to STARTED.