二、安装配置MYSQL5.6多实例-共享配置文件方法

二、安装配置MYSQL5.6多实例-共享配置文件方法1、如果之前已经运行了单实例的数据库请先停库
[root@mysql ~]# mysqladmin shutdown -u root-p
Enter password:

2、创建各实例的数据目录
[root@mysql ~]# mkdir /home/mysql/data3307
[root@mysql ~]# mkdir /home/mysql/data3308

3、修改各实例数据目录的属主
[root@mysql ~]# chown -R mysql.mysql/home/mysql/data3307
[root@mysql ~]# chown -R mysql.mysql/home/mysql/data3308

4、校验数据目录
[root@mysql ~]# cd /home/mysql/
[root@mysql mysql]# ll
total 12
drwxr-xr-x 5 mysql mysql 4096 Nov 5 23:44 data
drwxr-xr-x 2 mysql mysql 4096 Nov 5 23:58 data3307
drwxr-xr-x 2 mysql mysql 4096 Nov 5 23:58 data3308
[root@mysql mysql]#

5.修改my.cnf主配置文件
[root@mysql mysql]#cp /etc/my.cnf/etc/my.cnf.bak
[root@mysql mysql]#vim /etc/my.cnf
[mysqld]
#basedir=/usr/local/mysql
#datadir=/home/mysql/data
#socket = /usr/local/mysql/mysqld.sock
#port =3306
#server_id =100
user = mysql
join_buffer_size = 128M
sort_buffer_size = 2M
read_rnd_buffer_size = 2M
default_storage_engine = InnoDB
join_buffer_size = 128M
max_allowed_packet= 1M
net_buffer_length= 8K

[mysqld_multi]
mysqld =/usr/local/mysql/bin/mysqld_safe
mysqladmin=/usr/local/mysql/bin/mysqladmin

[mysqld3306]
port =3306
basedir =/usr/local/mysql
datadir =/home/mysql/data
socket =/home/mysql/data/mysqld.sock
server_id =1

[mysqld3307]
port =3307
basedir =/usr/local/mysql
datadir =/home/mysql/data3307
socket =/home/mysql/data3307/mysql.sock3307
server_id=2

[mysqld3308]
port =3308
basedir =/usr/local/mysql
datadir =/home/mysql/data3308
socket =/home/mysql/data3308/mysql.sock3308
server_id=3

6、初始化数据库实例
[root@mysql mysql]#/usr/local/mysql/scripts/mysql_install_db --basedir=/usr/local/mysql--datadir=/home/mysql/data3307 --user=mysql
[root@mysql mysql]#/usr/local/mysql/scripts/mysql_install_db --basedir=/usr/local/mysql--datadir=/home/mysql/data3308 --user=mysql

7、启动数据库
[root@mysql ~]# ps -ef|grep mysql|grep -vgrep
[root@mysql ~]# mysqld_multi start 3306
[root@mysql ~]# mysqld_multi start 3307
[root@mysql ~]# mysqld_multi start 3308

8、验证实例进程
[root@mysql ~]# ps -ef|grep mysql|grep -vgrep
root 60854 1 0 00:31 pts/0 00:00:00 /bin/sh/usr/local/mysql/bin/mysqld_safe --port=3306 --basedir=/usr/local/mysql--datadir=/home/mysql/data --socket=/home/mysql/data/mysqld.sock --server_id=1
mysql 61316 60854 0 00:31 pts/0 00:00:00 /usr/local/mysql/bin/mysqld--basedir=/usr/local/mysql --datadir=/home/mysql/data --plugin-dir=/usr/local/mysql/lib/plugin--user=mysql --server-id=1 --log-error=/home/mysql/data/mysql-error.log--open-files-limit=65535 --pid-file=/home/mysql/data/mysql.pid--socket=/home/mysql/data/mysqld.sock --port=3306
root 61348 1 0 00:31 pts/0 00:00:00 /bin/sh/usr/local/mysql/bin/mysqld_safe --port=3307 --basedir=/usr/local/mysql--datadir=/home/mysql/data3307 --socket=/home/mysql/data3307/mysql.sock3307--server_id=2
mysql 61810 61348 0 00:31 pts/0 00:00:00 /usr/local/mysql/bin/mysqld--basedir=/usr/local/mysql --datadir=/home/mysql/data3307 --plugin-dir=/usr/local/mysql/lib/plugin--user=mysql --server-id=2 --log-error=/home/mysql/data/mysql-error.log--open-files-limit=65535 --pid-file=/home/mysql/data3307/mysql.pid--socket=/home/mysql/data3307/mysql.sock3307 --port=3307
root 61841 1 0 00:31 pts/0 00:00:00 /bin/sh/usr/local/mysql/bin/mysqld_safe --port=3308 --basedir=/usr/local/mysql--datadir=/home/mysql/data3308 --socket=/home/mysql/data3308/mysql.sock3308--server_id=3
mysql 62303 61841 0 00:31 pts/0 00:00:00 /usr/local/mysql/bin/mysqld--basedir=/usr/local/mysql --datadir=/home/mysql/data3308--plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --server-id=3--log-error=/home/mysql/data/mysql-error.log --open-files-limit=65535--pid-file=/home/mysql/data3308/mysql.pid --socket=/home/mysql/data3308/mysql.sock3308--port=3308
[root@mysql ~]#

9.验证端口
[root@mysql ~]# netstat -tunlp|grep 330
tcp 0 0 :::3307 :::* LISTEN 61810/mysqld
tcp 0 0 :::3308 :::* LISTEN 62303/mysqld
tcp 0 0 :::3306 :::* LISTEN 61316/mysqld
[root@mysql ~]# ss -tunlp|grep 330
tcp LISTEN 0 128 :::3307 :::* users:(("mysqld",61810,12))
tcp LISTEN 0 128 :::3308 :::* users:(("mysqld",62303,12))
tcp LISTEN 0 128 :::3306 :::* users:(("mysqld",61316,12))
[root@mysql ~]#

9、登录3306、3307、3308实例
mysql -uroot -p -S/home/mysql/data/mysqld.sock
mysql -S/home/mysql/data3307/mysql.sock3307
mysql -S /home/mysql/data3307/mysql.sock3308
mysql> status;

8.停止数据库
[root@mysql ~]# mysqld_multi stop 3306
[root@mysql ~]# mysqld_multi stop 3307
[root@mysql ~]# mysqld_multi stop 3308
[root@mysql ~]# ps -ef|grep mysql|grep -vgrep
root 57734 1 0 00:23 pts/0 00:00:00 /bin/sh/usr/local/mysql/bin/mysqld_safe --port=3306 --basedir=/usr/local/mysql --datadir=/home/mysql/data--socket=/usr/local/mysql/mysqld.sock --server_id=100
mysql 58196 57734 0 00:23 pts/0 00:00:00 /usr/local/mysql/bin/mysqld--basedir=/usr/local/mysql --datadir=/home/mysql/data --plugin-dir=/usr/local/mysql/lib/plugin--user=mysql --server-id=100 --log-error=/home/mysql/data/mysql-error.log--open-files-limit=65535 --pid-file=/home/mysql/data/mysql.pid--socket=/usr/local/mysql/mysqld.sock --port=3306
[root@mysql ~]#
我们发现3306的实例还没有停止，这个是因为3306数据库配置了root@localhost的密码为123456，必须使用root用户及密码才能停
[root@mysql ~]# mysqld_multi stop 3306--user=root --password=123456
注意：3307，3308的实例没有配置密码登录，且空密码账户没有删除，不安全，要配置密码登录并删除掉空密码账户

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