MySQL 多实例管理

根据配置文件创建目录

[root@localhost redis]# mkdir -pv /data/mysql/mysql_3307/{data,logs,tmp}
mkdir: created directory `/data/mysql/mysql_3307'
mkdir: created directory `/data/mysql/mysql_3307/data'
mkdir: created directory `/data/mysql/mysql_3307/logs'
mkdir: created directory `/data/mysql/mysql_3307/tmp'
[root@localhost redis]# mkdir -pv /data/mysql/mysql_3308/{data,logs,tmp}
mkdir: created directory `/data/mysql/mysql_3308'
mkdir: created directory `/data/mysql/mysql_3308/data'
mkdir: created directory `/data/mysql/mysql_3308/logs'
mkdir: created directory `/data/mysql/mysql_3308/tmp'

修改配置文件(注意sock datadir  server_id  pid port的修改)

[root@localhost redis]# cp /etc/my.cnf  /data/mysql/mysql_3307/
[root@localhost redis]# cp /etc/my.cnf  /data/mysql/mysql_3308/ 
[root@localhost redis]# sed -i 's/3376/3307/g' /data/mysql/mysql_3307/my.cnf 
[root@localhost redis]# sed -i 's/3376/3308/g' /data/mysql/mysql_3308/my.cnf 

创建多实例

# ./scripts/mysql_install_db  --user=mysql --defaults-file=/data/mysql/mysql_3307/my.cnf --datadir=/data/mysql/mysql_3307/data/

# ./scripts/mysql_install_db  --user=mysql --defaults-file=/data/mysql/mysql_3308/my.cnf --datadir=/data/mysql/mysql_3308/data/

多实例启动方式

多实例用一个配置文件可以用mysqld_multi启动

# mysqld_multi  start 3307

# mysqld_multi  start 3308

mysqld --defaults-file=/data/mysql/mysql_3307/my.cnf &

mysqld --defaults-file=/data/mysql/mysql_3308/my.cnf &

mysqld_safe  --defaults-file=/data/mysql/mysql_3307/my.cnf  &

mysqld_safe  --defaults-file=/data/mysql/mysql_3308/my.cnf  &

连续启动

#mysqld_mulit start 1-3

#mysqld_mulit start 1,3,4,6

# mysql -S /tmp/mysql3307.sock

# mysql -S /tmp/mysql3308.sock

多实例关闭

 

[root@localhost data]# mysqladmin  --defaults-file=/data/mysql/mysql_3307/my.cnf  shutdown
[1]-  Done                    mysqld --defaults-file=/data/mysql/mysql_3307/my.cnf
[root@localhost data]# netstat -nalp | grep 3307 

多实例共用一个配置文件可以用下面方法关闭

#mysqladmin  -S /tmp/mysql3308.sock  shutdown
#mysqladmin  -S /tmp/mysql3307.sock  shutdown

多实例使用一个配置文件

[mysqld_multi]
mysqld = /usr/local/mysql/bin/mysqld_safe
mysqladmin = /usr/local/mysql/bin/mysqladmin
user       = mt_user
password   = abcd123
             
[mysqld3307]
#tee=/data/mysql/mysql_3307/data/query.log
datadir = /data/mysql/mysql_3307/data
socket = /tmp/mysql3307.sock
tmpdir=/data/mysql/mysql_3307/tmp
server-id = 123307
log-bin = /data/mysql/mysql_3307/logs/mysql-bin
innodb_data_home_dir = /data/mysql/mysql_3307/data
innodb_log_group_home_dir = /data/mysql/mysql_3307/logs
    
[mysqld3308]
port            = 3308
#tee=/data/mysql/mysql_3308/data/query.log
datadir = /data/mysql/mysql_3308/data
socket = /tmp/mysql3308.sock
tmpdir=/data/mysql/mysql_3308/tmp
server-id = 123308
log-bin = /data/mysql/mysql_3308/logs/mysql-bin
innodb_data_home_dir = /data/mysql/mysql_3308/data
innodb_log_group_home_dir = /data/mysql/mysql_3308/logs
                                                          

[root@localhost mysql_3307]# pkill mysql
[root@localhost mysql_3307]# mysqld_multi  start 3307,3308
[root@localhost mysql_3307]# netstat -nalp | grep mysql
tcp        0      0 :::3308                     :::*                        LISTEN      9247/mysqld         
tcp        0      0 :::3376                     :::*                        LISTEN      9231/mysqld         
unix  2      [ ACC ]     STREAM     LISTENING     21545  9231/mysqld         /tmp/mysql3307.sock
unix  2      [ ACC ]     STREAM     LISTENING     21554  9247/mysqld         /tmp/mysql3308.sock

 创建关闭数据库用户

(product)root@localhost [(none)]> create user 'mt_user'@'localhost' identified by 'abc123';
Query OK, 0 rows affected (0.00 sec)

(product)root@localhost [(none)]> GRANT SHUTDOWN ON *.* TO 'mt_user'@'localhost'; 
Query OK, 0 rows affected (0.00 sec)

[root@localhost mysql_3307]# /usr/local/mysql/bin/mysqladmin -h localhost -S /tmp/mysql3307.sock -umt_user -pabc123 shutdown 
Warning: Using a password on the command line interface can be insecure.
[root@localhost mysql_3307]# netstat -nalp | grep 3307
[root@localhost mysql_3307]# /usr/local/mysql/bin/mysqladmin -h localhost -S /tmp/mysql3308.sock -umt_user -pabc123 shutdown 
Warning: Using a password on the command line interface can be insecure.
[root@localhost mysql_3307]#