MySQL 多实例配置管理

配置多实例my.cnf：

[root@open_source 3309]# cat /mysql/3307/my.cnf 
[mysqld]
user=mysql
basedir=/usr/local/mysql
datadir=/mysql/3307/data
socket=/tmp/mysql3307.sock
port=3307
server_id=7
[root@open_source 3309]# cat /mysql/3308/my.cnf 
[mysqld]
user=mysql
basedir=/usr/local/mysql
datadir=/mysql/3308/data
socket=/tmp/mysql3308.sock
port=3308
server_id=8
[root@open_source 3309]# cat /mysql/3309/my.cnf 
[mysqld]
user=mysql
basedir=/usr/local/mysql
datadir=/mysql/3309/data
socket=/tmp/mysql3309.sock
port=3309
server_id=9

初始化多实例

mysqld --initialize-insecure --user=mysql --basedir=/usr/local/mysql --datadir=/mysql/3307/data/
mysqld --initialize-insecure --user=mysql --basedir=/usr/local/mysql --datadir=/mysql/3308/data/
mysqld --initialize-insecure --user=mysql --basedir=/usr/local/mysql --datadir=/mysql/3309/data/

启动多实例：

[root@open_source 3309]# mysqld_safe  --defaults-file=/mysql/3307/my.cnf &
[root@open_source 3309]# mysqld_safe  --defaults-file=/mysql/3308/my.cnf &
[root@open_source 3309]# mysqld_safe  --defaults-file=/mysql/3309/my.cnf &
[root@open_source 3309]# ps -ef|grep mysql |grep -v grep
root      10251   7511  0 18:57 pts/1    00:00:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --defaults-file=/mysql/3307/my.cnf
mysql     10428  10251  0 18:57 pts/1    00:00:00 /usr/local/mysql/bin/mysqld --defaults-file=/mysql/3307/my.cnf --basedir=/usr/local/mysql --datadir=/mysql/3307/data --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=open_source.err --pid-file=open_source.pid --socket=/tmp/mysql3307.sock --port=3307
root      10464   7511  0 18:59 pts/1    00:00:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --defaults-file=/mysql/3308/my.cnf
mysql     10641  10464  0 18:59 pts/1    00:00:01 /usr/local/mysql/bin/mysqld --defaults-file=/mysql/3308/my.cnf --basedir=/usr/local/mysql --datadir=/mysql/3308/data --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=open_source.err --pid-file=open_source.pid --socket=/tmp/mysql3308.sock --port=3308
root      10672   7511  0 19:00 pts/1    00:00:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --defaults-file=/mysql/3309/my.cnf
mysql     10849  10672  0 19:00 pts/1    00:00:01 /usr/local/mysql/bin/mysqld --defaults-file=/mysql/3309/my.cnf --basedir=/usr/local/mysql --datadir=/mysql/3309/data --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=open_source.err --pid-file=open_source.pid --socket=/tmp/mysql3309.sock --port=3309
[root@open_source 3309]# netstat -anlt |grep 33
tcp6       0      0 :::3307                 :::*                    LISTEN     
tcp6       0      0 :::3308                 :::*                    LISTEN     
tcp6       0      0 :::3309                 :::*                    LISTEN

登录多实例server_id：

[root@open_source 3309]# mysql -S /tmp/mysql3307.sock -e "select @@server_id"
+-------------+
| @@server_id |
+-------------+
|           7 |
+-------------+
[root@open_source 3309]# mysql -S /tmp/mysql3308.sock -e "select @@server_id"
+-------------+
| @@server_id |
+-------------+
|           8 |
+-------------+
[root@open_source 3309]# mysql -S /tmp/mysql3309.sock -e "select @@server_id"
+-------------+
| @@server_id |
+-------------+
|           9 |
+-------------+

停止多实例:

[root@open_source ~]# mysqladmin -S /tmp/mysql3307.sock shutdown
2020-03-10T00:04:36.491980Z mysqld_safe mysqld from pid file /mysql/3307/data/open_source.pid ended
[1]   Done                    mysqld_safe --defaults-file=/mysql/3307/my.cnf  (wd: /mysql/3309)
(wd now: ~)
[root@open_source ~]# mysqladmin -S /tmp/mysql3308.sock shutdown
2020-03-10T00:04:45.304744Z mysqld_safe mysqld from pid file /mysql/3308/data/open_source.pid ended
[2]-  Done                    mysqld_safe --defaults-file=/mysql/3308/my.cnf  (wd: /mysql/3309)
(wd now: ~)
[root@open_source ~]# mysqladmin -S /tmp/mysql3309.sock shutdown
2020-03-10T00:04:54.383289Z mysqld_safe mysqld from pid file /mysql/3309/data/open_source.pid ended
[3]+  Done                    mysqld_safe --defaults-file=/mysql/3309/my.cnf  (wd: /mysql/3309)
(wd now: ~)