一、单实例安装mysql5.7.14

1.1、查看是否安装过mysql

[root@server136 ~]# ps -ef | grep mysql*

1.2、解压mysql软件包

[root@server136 ~]#tar zxvf mysql-5.7.14-linux-glibc2.5-x86_64.tar.gz

1.3、新建mysql用户名和组

[root@server136 ~]#groupadd mysql

[root@server136 ~]#useradd -g mysql -r mysql  #r代表新建系统用户不能登录

1.4、把mysql  copy到/usr/local并重命名为mysql

[root@server136 ~]# cp -R mysql-5.7.14-linux-glibc2.5-x86_64 /usr/local/

[root@server136 ~]#mv mysql-5.7.14-linux-glibc2.5-x86_64/ mysql

或

[root@server136 ~]# ln -sv mysql-5.7.14-linux-glibc2.5-x86_64 /usr/local/mysql/

1.5、建立数据文件夹，并更改属主和属组

[root@server136 ~]#mkdir -p /data/{3306,3307,3308}

[root@server136 ~]#chown -R mysql.mysql /usr/local/mysql/

[root@server136 ~]#chown -R mysql.mysql /data/

1.6、配置环境

[root@server136 ~]#echo "export PATH=$PATH:/usr/local/mysql/bin/" >>/etc/profile

[root@server136 ~]#source /etc/profile

1.7、初始化安装mysql；--initialize-insecure这个参数代表不设密码

[root@server136 ~]#/usr/local/mysql/bin/mysqld --initialize-insecure --user=mysql --basedir=/usr/local/mysql/ --datadir=/data/3306/

1.8、cp配置和启动文件，并编辑my.cnf

[root@server136 ~]# cp /usr/local/mysql/support-files/my-default.cnf /etc/my.cnf

[root@server136 ~]#cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld

[root@server136 ~]#vi /etc/my.cnf

[mysqld]

basedir = /usr/local/mysql

datadir = /data/3306

port = 3306

server_id = 1

socket =/data/3306/mysql.sock

symbolic-links = 0

character_set_server = utf8

sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

[client]

socket=/data/3306/mysql.sock

1.9、启动数据库并设置密码

[root@server136 ~]#/etc/init.d/mysqld start

[root@server136 ~]#mysql

mysql> update mysql.user set authentication_string=password('lila3306') where user='root';

mysql> flush privileges;

mysql> exit

二、多实例配置

2.1、cp多实例脚本服务到/etc/init.d,并重命名

[root@server136 ~]#cp /usr/local/mysql/support-files/mysqld_multi.server /etc/init.d/mysqld_multi

2.2、初始化安装另外两个数据库

[root@server136 ~]#/usr/local/mysql/bin/mysqld --initialize-insecure --user=mysql --basedir=/usr/local/mysql/ --datadir=/data/3307/

[root@server136 ~]#/usr/local/mysql/bin/mysqld --initialize-insecure --user=mysql --basedir=/usr/local/mysql/ --datadir=/data/3308/

2.3、配置多实例数据库配置文件

[root@server136 ~]# vi /etc/my.cnf

[mysqld_multi]

mysqld=/usr/local/mysql/bin/mysqld_safe

mysqladmin=/usr/local/mysql/bin/mysqladmin

log=/data/mysql_multi.log

user = root

password = redhat

[mysqld3306]

basedir=/usr/local/mysql

datadir=/data/3306

port=3306

server_id=1

socket=/data/3306/mysql.sock

symbolic-links=0

character_set_server=utf8

pid-file=/data/3306/mysql.pid

log_error=/data/3306/3306.err

[mysqld3307]

datadir=/data/3307

port=3307

socket=/data/3307/mysql.sock

symbolic-links=0

character_set_server=utf8

pid-file=/data/3307/mysql.pid

log_error=/data/3307/3307.err

[mysqld3308]

datadir=/data/3308

port=3308

socket=/data/3308/mysql.sock

symbolic-links=0

character_set_server=utf8

pid-file=/data/3308/mysql.pid

sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

2.4、启动多实例，并查看服务是否启动

[root@server136 ~]# /etc/init.d/mysqld_multi start

[root@server136 ~]# /etc/init.d/mysqld_multi report

Reporting MySQL servers

MySQL server from group: mysqld3306 is running

MySQL server from group: mysqld3307 is running

MySQL server from group: mysqld3308 is running

[root@server136 ~]#

2.5、登录数据库（注意，必须跟端口号和主机地址，否则会报错）

[root@server136 ~]# mysql -uroot -P3307 -h127.0.0.1 -p