mysql多實例部署

這裏使用mysqld_multi來安裝多實例的方式 ，安裝mysql略，能夠採起yum直接安裝方式。 

因爲資源有限，環境需求單臺機器創建兩個mysql實例來做爲測試使用：

路徑分別爲

/var/lib/mysql3306

/var/lib/mysql3307

更改屬主、組權限

[root@dev02 lib]#chown mysql.mysql /var/lib/mysql3306 -R

[root@dev02 lib]#chown mysql.mysql /var/lib/mysql3307 -R

初始化mysql：

[root@dev02 lib]#cd /var/lib/mysql3306/

[root@dev02 lib]#mysql_install_db --datadir=/var/lib/mysql3306 --user=mysql

[root@dev02 lib]#cd /var/lib/mysql3307/

[root@dev02 lib]#mysql_install_db --datadir=/var/lib/mysql3307 --user=mysql

建立多實例的配置文件，能夠在任何路徑下，只要後面啓動時指定此配置文件路徑便可。

注意兩實例的socket,port,datadir,pid的配置要區別開.

[root@dev02 lib]# more /var/lib/my_multi.cnf    

[mysqld_multi]

mysqld = /usr/bin/mysqld_safe

mysqladmin = /usr/bin/mysqladmin

user = root

[mysqld1]

socket = /tmp/mysql_3306.sock

port = 3306

pid-file = /var/lib/mysql3306/mysql3306.pid

datadir = /var/lib/mysql3306

log = /var/lib/mysql3306/mysql3306.log

user = mysql

#----------------parameter optimization----------  參數優化部分可忽略

symbolic-links=0

max_allowed_packet=50M

character-set-server = utf8

#lower_case_table_names=1

general_log=/var/log/codfei.log

skip-external-locking

#skip-name-resolve

tmp_table_size = 256M

sql-mode= STRICT_TRANS_TABLES

default-storage-engine=INNODB

#query_cache_size = 16M

sort_buffer_size = 16M

read_buffer_size = 16M

table_cache = 512

ignore_builtin_innodb

plugin_dir=/usr/lib64/mysql/plugin

plugin_load=innodb=ha_innodb_plugin.so

  ;innodb_trx=ha_innodb_plugin.so

  ;innodb_locks=ha_innodb_plugin.so

  ;innodb_lock_waits=ha_innodb_plugin.so

  ;innodb_cmp=ha_innodb_plugin.so

  ;innodb_cmp_reset=ha_innodb_plugin.so

  ;innodb_cmpmem=ha_innodb_plugin.so

  ;innodb_cmpmem_reset=ha_innodb_plugin.so

max_connections = 1024

slow_query_log = /var/log/mysqlslowqueries.log

long_query_time = 4

skip-host-cache

max_allowed_packet = 160M

[mysqld2]

socket = /tmp/mysql_3307.sock

port = 3307

pid-file = /var/lib/mysql3306/mysql3307.pid

datadir = /var/lib/mysql3307

log = /var/lib/mysql3306/mysql3307.log

user = mysql

#----------------parameter optimization----------  參數優化部分可忽略

symbolic-links=0

max_allowed_packet=50M

character-set-server = utf8

#lower_case_table_names=1

general_log=/var/log/codfei.log

skip-external-locking

#skip-name-resolve

tmp_table_size = 256M

sql-mode= STRICT_TRANS_TABLES

default-storage-engine=INNODB

#query_cache_size = 16M

sort_buffer_size = 16M

read_buffer_size = 16M

table_cache = 512

ignore_builtin_innodb

plugin_dir=/usr/lib64/mysql/plugin

plugin_load=innodb=ha_innodb_plugin.so

  ;innodb_trx=ha_innodb_plugin.so

  ;innodb_locks=ha_innodb_plugin.so

  ;innodb_lock_waits=ha_innodb_plugin.so

  ;innodb_cmp=ha_innodb_plugin.so

  ;innodb_cmp_reset=ha_innodb_plugin.so

  ;innodb_cmpmem=ha_innodb_plugin.so

  ;innodb_cmpmem_reset=ha_innodb_plugin.so

max_connections = 1024

slow_query_log = /var/log/mysqlslowqueries.log

long_query_time = 4

skip-host-cache

max_allowed_packet = 160M

[root@dev02 lib]#chown mysql.mysql /var/lib/my_multi.cnf -R

[root@dev02 lib]#/usr/bin/mysqld_multi --defaults-extra-file=/var/lib/my_multi.cnf start 1,2   啓動多實例,建議加入到開機自啓動中

[root@dev02 lib]# ps aux|grep mysqld  查看兩實例已啓動

root      3893  0.0  0.0 110272  1380 pts/0    S    07:05   0:00 /bin/sh /usr/bin/mysqld_safe --socket=/tmp/mysql_3306.sock --port=3306 --pid-file=/var/lib/mysql3306/mysql3306.pid --datadir=/var/lib/mysql3306 --log=/var/lib/mysql3306/mysql3306.log --user=mysql

root      3900  0.0  0.0 110272  1384 pts/0    S    07:05   0:00 /bin/sh /usr/bin/mysqld_safe --socket=/tmp/mysql_3307.sock --port=3307 --pid-file=/var/lib/mysql3306/mysql3307.pid --datadir=/var/lib/mysql3307 --log=/var/lib/mysql3306/mysql3307.log --user=mysql

mysql     4041  0.0  0.6 185856 25544 pts/0    Sl   07:05   0:01 /usr/sbin/mysqld --basedir=/ --datadir=/var/lib/mysql3306 --user=mysql --log=/var/lib/mysql3306/mysql3306.log --log-error=/var/lib/mysql3306/dev02.err --pid-file=/var/lib/mysql3306/mysql3306.pid --socket=/tmp/mysql_3306.sock --port=3306

mysql     4047  0.0  0.7 186100 30996 pts/0    Sl   07:05   0:01 /usr/sbin/mysqld --basedir=/ --datadir=/var/lib/mysql3307 --user=mysql --log=/var/lib/mysql3306/mysql3307.log --log-error=/var/lib/mysql3307/dev02.err --pid-file=/var/lib/mysql3306/mysql3307.pid --socket=/tmp/mysql_3307.sock --port=3307

root      4226  0.0  0.0 107428   896 pts/0    S+   07:52   0:00 grep mysqld

分別鏈接實例更改密碼：

[root@dev02 lib]#mysql -uroot -p -S /tmp/mysql_3306.sock  登陸第一個mysql，空密碼直接回車

mysql> set password=password("olymtech1");

Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

mysql> grant all on *.* to user1@"%" Identified by "123456";  建立普通用戶並賦予權限

[root@dev02 lib]#mysql -uroot -p -S /tmp/mysql_3307.sock  登陸第二個mysql，同上設置密碼

中止各實例（試了下未成功，只能手動kill掉）：

/usr/bin/mysqld_multi --defaults-extra-file=/var/lib/my_multi.cnf stop 1

/usr/bin/mysqld_multi --defaults-extra-file=/var/lib/my_multi.cnf stop 2

啓動各實例：

/usr/bin/mysqld_multi --defaults-extra-file=/var/lib/my_multi.cnf start 1

/usr/bin/mysqld_multi --defaults-extra-file=/var/lib/my_multi.cnf start 2

補充多實例下mysql配置文件查找的順序:

1. 首先讀取/etc/my.cnf。

2. $datadir/my.cnf，在數據庫目錄下尋找此配置文件。

3. defaultfile=/path/my.cnf 一般寫在命令行上，mysqld_safe defaultfile=/tmp/my.cnf &等執行。

4，~/my.cnf 當前用戶下的配置文件。

參考文檔：

http://sharkyan.blog.51cto.com/536264/271144/

http://www.cnblogs.com/acpp/archive/2010/08/09/1795466.html

http://www.linuxidc.com/Linux/2012-11/73615.htm