好久沒有寫文章了，今天來看看MYSQL的實(shí)例管理器（MYSQLMANAGER）。
一、簡單介紹：
1、MySQL實(shí)例管理器(IM)是通過TCP/IP端口運(yùn)行的后臺程序，用來監(jiān)視和管理MySQL數(shù)據(jù)庫服務(wù)器實(shí)例。（如果你之前用過MYSQLD_MULTI就很清楚了。）
2、如果IM掛了，則所有的實(shí)例就掛掉了；如果實(shí)例掛了，IM會嘗試重新啟動它。
3、IM讀取配置文件比如MY.CNF的[manager]段。
4、此例是在LINUX下試驗(yàn)的，其他的系統(tǒng)手冊上有詳細(xì)介紹。
二、一些詳細(xì)配置。
1、
以下是我的配置文件
[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]
...
這個有兩個配置實(shí)例，具體就不說了。見我的安裝多個實(shí)例的文章。

具體含義查看mysqlmanager --help

2、密碼文件。
IM將用戶信息保存到密碼文件中。密碼文件的默認(rèn)位置為/etc/mysqlmanager.passwd。

密碼應(yīng)類似于：

petr:*35110DC9B4D8140F5DE667E28C72DD2597B5C848

我的mysqlmanager.passwd內(nèi)容
user_all:*6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9
3、啟動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 '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、連接IM。
[root@localhost ~]# mysql -uuser_all -p -S/tmp/manager.sock -P1999
三、用IM來管理MYSQL。

1、顯示實(shí)例的狀態(tài)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)
關(guān)閉實(shí)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)
開啟實(shí)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)

查看實(shí)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)

也可以顯示實(shí)例的選項(xiàng)信息。
mysql> show instance options mysqld1;
+-----------------------+-----------------------------------+
| option_name?????????? | value???????????????????????????? |
+-----------------------+-----------------------------------+
| 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)

也可以查詢實(shí)例的日志相關(guān)信息，這里我就不寫了。

可以看出，管理實(shí)例非常方便。

2、管理用戶。

1）、添加管理用戶
[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
不過注意必須重新啟動IM才可以生效。
[root@localhost ~]# mysql -ushit_all -p -S/tmp/manager.sock -P1999
Enter password:
ERROR 1045 (28000): Access denied. Bad username/password pair

2）、修改用戶密碼
[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）、刪除用戶。
[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）、列出當(dāng)前管理用戶。


[root@localhost ~]# /usr/local/mysql/bin/mysqlmanager --list-user

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、遠(yuǎn)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
Bye

總結(jié)：MYSQL的實(shí)例管理器對于多個MYSQL實(shí)例的管理還是很方便的。
不過有兩個缺點(diǎn)
1、不能直接進(jìn)行數(shù)據(jù)庫的SQL管理命令。
2、一定要保證IM進(jìn)程不掛掉。

轉(zhuǎn)載于:https://www.cnblogs.com/secbook/archive/2008/05/05/2655302.html

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