MySQL多实例部署

MySQL多实例部署

下载二进制格式的mysql软件包

[root@liu ~]# wget https://downloads.mysql.com/archives/get/p/23/file/mysql-5.7.38-linux-glibc2.12-x86_64.tar.gz
[root@liu ~]# ls
anaconda-ks.cfg  bao  mysql-5.7.38-linux-glibc2.12-x86_64.tar.gz

添加mysql用户和组

[root@liu ~]# useradd -M -s /sbin/nologin -r mysql 

解压二进制软件包至/usr/local下

[root@liu ~]# tar xf mysql-5.7.38-linux-glibc2.12-x86_64.tar.gz -C /usr/local/
[root@liu ~]# ls /usr/local/mysql-5.7.38-linux-glibc2.12-x86_64/
bin  docs  include  lib  LICENSE  man  README  share  support-files

设置mysql软链接

[root@liu ~]# cd /usr/local/

[root@liu local]# ln -sv /usr/local/mysql-5.7.38-linux-glibc2.12-x86_64/ mysql
'mysql' -> '/usr/local/mysql-5.7.38-linux-glibc2.12-x86_64/'

修改目录/usr/local/mysql的属主属组

[root@liu local]# chown -R mysql.mysql /usr/local/mysql
[root@liu local]# chown -R mysql.mysql /usr/local/mysql-5.7.38-linux-glibc2.12-x86_64

配置环境变量

[root@liu ~]# echo 'export PATH=$PATH:/usr/local/mysql/bin' > /etc/profile.d/mysql.sh
[root@liu ~]# source /etc/profile.d/mysql.sh

配置头文件路径和lib库文件

[root@liu ~]# ln -s /usr/local/mysql/include/ /usr/include/mysql
[root@liu ~]# echo '/usr/local/mysql/lib/' > /etc/ld.so.conf.d/mysql.conf

配置man手册

[root@liu mysql]# vim /etc/man_db.conf 
MANDATORY_MANPATH                       /usr/local/mysql/man

创建各实例数据存放的目录

[root@liu ~]# mkdir -p /opt/data/{3306,3307,3308}
[root@liu ~]# chown -R mysql.mysql /opt/data/
[root@liu ~]# ll /opt/data/
total 0
drwxr-xr-x. 2 mysql mysql 6 Jul 29 08:28 3306
drwxr-xr-x. 2 mysql mysql 6 Jul 29 08:28 3307
drwxr-xr-x. 2 mysql mysql 6 Jul 29 08:28 3308

初始化各实例

[root@liu ~]# mysqld --initialize --datadir=/opt/data/3306 --user=mysql
***省略部分输出***
2022-07-29T00:35:52.574812Z 1 [Note] A temporary password is generated for root@localhost: OCCu?hMNt63u
[root@liu ~]# echo 'OCCu?hMNt63u' > 3306pass
#其它实例同样操作

安装perl

[root@liu ~]#yum -y install perl

配置mysql配置文件

[root@liu ~]# vim /etc/my.cnf
[mysqld_multi]
mysqld = /usr/local/mysql/bin/mysqld_safe
mysqladmin = /usr/local/mysql/bin/mysqladmin

[mysqld3306]
datadir = /opt/data/3306
port = 3306
socket = /tmp/mysql3306.sock
pid-file = /opt/data/3306/mysql_3306.pid
log-error=/var/log/3306.log

[mysqld3307]
datadir = /opt/data/3307
port = 3307
socket = /tmp/mysql3307.sock
pid-file = /opt/data/3307/mysql_3307.pid
log-error=/var/log/3307.log

[mysqld3308]
datadir = /opt/data/3308
port = 3308
socket = /tmp/mysql3308.sock
pid-file = /opt/data/3308/mysql_3308.pid
log-error=/var/log/3308.log

启动各实例

[root@liu ~]# mysqld_multi start 3306
[root@liu ~]# mysqld_multi start 3307
[root@liu ~]# mysqld_multi start 3308
#各端口成功开启
[root@liu ~]# ss -tanl
State      Recv-Q     Send-Q         Local Address:Port         Peer Address:Port    Process     
LISTEN     0          128                  0.0.0.0:22                0.0.0.0:*                   
LISTEN     0          80                         *:3306                    *:*                   
LISTEN     0          80                         *:3307                    *:*                   
LISTEN     0          80                         *:3308                    *:*                   
LISTEN     0          128                        *:80                      *:*                   
LISTEN     0          128                     [::]:22                   [::]:*       

初始化密码

[root@liu ~]# ls
3306pass  3307pass  3308pass 
[root@liu ~]# cat 3306pass 
OCCu?hMNt63u
[root@liu ~]# mysql -uroot -p'OCCu?hMNt63u' -S /tmp/mysql3306.sock
#进入数据库报错，缺少依赖库文件
mysql: error while loading shared libraries: libncurses.so.5: cannot open shared object file: No such file or directory
#搜索该依赖库文件
[root@liu ~]# yum whatprovides libncurses.so.5
Last metadata expiration check: 0:11:38 ago on Fri 29 Jul 2022 08:39:45 AM CST.
ncurses-compat-libs-6.1-9.20180224.el8.i686 : Ncurses compatibility libraries
Repo        : BaseOS
Matched from:
Provide    : libncurses.so.5
#安装该包
[root@liu ~]# dnf -y install ncurses-compat-libs
#再次进入
[root@liu ~]# mysql -uroot -p'OCCu?hMNt63u' -S /tmp/mysql3306.sock
mysql> set password = password('3306');
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> exit
Bye
[root@liu ~]# cat 3307pass 
L.ioS-JL8LA-
[root@liu ~]# mysql -uroot -p'L.ioS-JL8LA-' -S /tmp/mysql3307.sock
mysql> set password = password('3307');
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> exit
Bye
[root@liu ~]# cat 3308pass 
uljeEN.!0i)d
[root@liu ~]# mysql -uroot -p'uljeEN.!0i)d' -S /tmp/mysql3308.sock
mysql> set password = password('3308');
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> exit
Bye