使用实例管理器轻松管理多个MySQL实例

  • 来源: 赛迪网 作者: 若水   2008-05-10/17:03
  •    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. #p#分页标题#e#
    [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 'root@localhost.localdomain' 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.
    4、连接IM
    [root@localhost ~]# MySQL -uuser_all -p -S/tmp/manager.sock -P1999
    三、用IM来管理MySQL数据库
    1、显示实例的状态和版本信息
    [root@localhost ~]# mysql -uuser_all -p -S/tmp/manager.sock -P1999
    Enter password:
    Welcome to the MySQL monitor. Commands end with ; or \g.
    Your MySQL connection id is 1
    Server version: 1.0-beta
    Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
    mysql> show instances;
    +---------------+--------+
    | instance_name | state |
    +---------------+--------+
    | mysqld1 | online |
    | mysqld2 | online |
    +---------------+--------+
    2 rows in set (0.00 sec)
    关闭实例1
    mysql> stop instance mysqld1;
    Query OK, 0 rows affected (0.30 sec)
    mysql> show instances;
    +---------------+---------+
    | instance_name | state |
    +---------------+---------+
    | mysqld1 | offline |
    | mysqld2 | online |
    +---------------+---------+
    2 rows in set (0.00 sec)
    开启实例1
    mysql> start instance mysqld1;
    Query OK, 0 rows affected (0.00 sec)
    Instance started
    mysql> show instances;
    +---------------+--------+
    | instance_name | state |
    +---------------+--------+
    | mysqld1 | online |
    | mysqld2 | online |
    +---------------+--------+
    2 rows in set (0.00 sec)
    查看实例的版本信息
    mysql> show instance status mysqld2;
    +---------------+--------+----------------+
    | instance_name | state | version_number | version | mysqld_compatible |
    +---------------+--------+----------------+
    | mysqld2 | online | 5.1.23 | 5.1.23a-maria-alpha for redhat-Linux-gnu on i686 (MySQL Community Server [Maria] (GPL))
    | no |
    +---------------+--------+----------------+
    1 row in set (0.00 sec)
    也可以显示实例的选项信息
    mysql> show instance options mysqld1;
    +-----------------------+-----------------------------------+
    | option_name | value |
    +-----------------------+-----------------------------------+ #p#分页标题#e#
    | instance_name | mysqld1 |
    | basedir | /usr/local/mysql |
    | datadir | /usr/local/mysql/data |
    | user | mysql |
    | default-character-set | utf8 |
    | port | 3306 |
    | socket | /tmp/mysql1.sock |
    | skip-locking | |
    | skip-name-resolve | |
    | key_buffer | 126M |
    | max_allowed_packet | 2M |
    | table_cache | 512 |
    | sort_buffer_size | 2M |
    | read_buffer_size | 2M |
    | read_rnd_buffer_size | 4M |
    | net_buffer_length | 2K |
    | thread_stack | 64K |
    | log-bin | mysql.log |
    | expire_logs_days | 5 |
    | wait_timeout | 20 |
    | pid-file | mysqld1-localhost.localdomain.pid |
    +-----------------------+-----------------------------------+
    21 rows in set (0.00 sec)
    也可以查询实例的日志相关信,不再赘述。
    我们可以发现,管理实例其实非常方便。
    2、管理用户
    (1)、添加管理用户
    [root@localhost ~]# /usr/local/mysql/bin/mysqlmanager --add-user
    WARNING: This program is deprecated and will be removed in 6.0.
    [3046/3086816960] [08/04/24 14:33:13] [INFO] IM: started.
    [3046/3086816960] [08/04/24 14:33:13] [INFO] Loading config file 'my.cnf'...
    Enter user name: shit_all
    [3046/3086816960] [08/04/24 14:33:18] [INFO] Loading the password database...
    [3046/3086816960] [08/04/24 14:33:18] [INFO] Loaded user 'user_all'.
    [3046/3086816960] [08/04/24 14:33:18] [INFO] The password database loaded successfully.
    Enter password:
    Re-type password:
    [3046/3086816960] [08/04/24 14:33:23] [INFO] IM: finished.
    [root@localhost ~]# cat /etc/mysqlmanager.passwd
    user_all:*6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9
    shit_all:*6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9
    注意:必须重新启动IM才能生效。
    [root@localhost ~]# mysql -ushit_all -p -S/tmp/manager.sock -P1999
    Enter password:
    ERROR 1045 (28000): Access denied. Bad username/password pair
    (2)、修改用户密码
    [root@localhost ~]# /usr/local/mysql/bin/mysqlmanager --edit-user
    WARNING: This program is deprecated and will be removed in 6.0.
    [3214/3086845632] [08/04/24 14:35:15] [INFO] IM: started.
    [3214/3086845632] [08/04/24 14:35:15] [INFO] Loading config file 'my.cnf'...
    Enter user name: shit_all
    [3214/3086845632] [08/04/24 14:35:19] [INFO] Loading the password database...
    [3214/3086845632] [08/04/24 14:35:19] [INFO] Loaded user 'user_all'.
    [3214/3086845632] [08/04/24 14:35:19] [INFO] Loaded user 'shit_all'.
    [3214/3086845632] [08/04/24 14:35:19] [INFO] The password database loaded successfully.
    Enter password:
    Re-type password:
    [3214/3086845632] [08/04/24 14:35:24] [INFO] IM: finished.
    (3)、删除用户
    [root@localhost ~]# /usr/local/MySQL/bin/mysqlmanager --drop-user
    WARNING: This program is deprecated and will be removed in 6.0.
    [3338/3086501568] [08/04/24 14:36:42] [INFO] IM: started.
    [3338/3086501568] [08/04/24 14:36:42] [INFO] Loading config file 'my.cnf'...
    Enter user name: shit_all
    [3338/3086501568] [08/04/24 14:36:45] [INFO] Loading the password database...
    [3338/3086501568] [08/04/24 14:36:45] [INFO] Loaded user 'user_all'.
    [3338/3086501568] [08/04/24 14:36:45] [INFO] Loaded user 'shit_all'.
    [3338/3086501568] [08/04/24 14:36:45] [INFO] The password database loaded successfully.
    [3338/3086501568] [08/04/24 14:36:45] [INFO] IM: finished.
    (4)、列出当前管理用户
    [root@localhost ~]# /usr/local/mysql/bin/mysqlmanager --list-user #p#分页标题#e#
    WARNING: This program is deprecated and will be removed in 6.0.
    [3366/3086087872] [08/04/24 14:37:07] [INFO] IM: started.
    [3366/3086087872] [08/04/24 14:37:07] [INFO] Loading config file 'my.cnf'...
    [3366/3086087872] [08/04/24 14:37:07] [INFO] Loading the password database...
    [3366/3086087872] [08/04/24 14:37:07] [INFO] Loaded user 'user_all'.
    [3366/3086087872] [08/04/24 14:37:07] [INFO] The password database loaded successfully.
    user_all
    [3366/3086087872] [08/04/24 14:37:07] [INFO] IM: finished.
    [root@localhost ~]#
    四、远程管理
    C:\Documents and Settings\Administrator>mysql -uuser_all -p -P1999 -h192.168.0.2
    31
    Enter password: ******
    Welcome to the MySQL monitor. Commands end with ; or \g.
    Your MySQL connection id is 3
    Server version: 1.0-beta
    Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
    mysql> show instances;
    +---------------+--------+
    | instance_name | state |
    +---------------+--------+
    | mysqld1 | online |
    | mysqld2 | online |
    +---------------+--------+
    2 rows in set (0.00 sec)
    mysql> quit
    总结:
    MySQL数据库的实例管理器对于多个MySQL实例的管理是很方便的,但它本身存在两个不足:
    1、不能直接进行数据库的SQL管理命令。
    2、一定要确保IM进程不会突然挂掉。

    评论 {{userinfo.comments}}

    {{money}}

    {{question.question}}

    A {{question.A}}
    B {{question.B}}
    C {{question.C}}
    D {{question.D}}
    提交

    驱动号 更多