• 解压 MySQL 5.7 二进制包到指定目录

  [root@MySQL ~]# tar zxvf mysql-5.7.18-linux-glibc2.5-x86_64.tar.gz -C /usr/local/

• 创建 MySQL 软链接

  [root@MySQL ~]#mv /usr/local/mysql-5.7.18-linux-glibc2.5-x86_64 /usr/local/mysql

• 创建 MySQL 用户

  [root@MySQL ~]#groupadd -r mysql
  [root@MySQL ~]# useradd -r -g mysql -s /bin/false -M mysql

• 在 MySQL 二进制包目录中创建 mysql-files 目录 [MySQL 数据导入/导出数据专放目录]

  [root@MySQL ~]# mkdir -v /usr/local/mysql/mysql-files
  mkdir: created directory `/usr/local/mysql/mysql-files'

• 创建多实例数据目录

  [root@MySQL ~]# mkdir -vp /data/mysql_data{1..4}
  mkdir: created directory /data' <br/>mkdir: created directory/data/mysql_data1'
  mkdir: created directory /data/mysql_data2' <br/>mkdir: created directory/data/mysql_data3'
  mkdir: created directory `/data/mysql_data4'

• 修改 MySQL 二进制包目录的所属用户与所属组

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

• 修改 MySQL 多实例数据目录与 数据导入/导出专放目录的所属用户与所属组

  [root@MySQL ~]# chown mysql.mysql -R /usr/local/mysql/mysql-files /data/mysql_data{1..4}

• 配置 MySQL 配置文件 /etc/my.cnf
  [mysqld_multi]
  mysqld = /usr/local/mysql/bin/mysqld
  mysqladmin = /usr/local/mysql/bin/mysqladmin
  log = /tmp/mysql_multi.log

[mysqld1]

# 设置数据目录　[多实例中一定要不同]

datadir = /data/mysql_data1

# 设置sock存放文件名　[多实例中一定要不同] socket = /tmp/mysql.sock1 # 设置监听开放端口　[多实例中一定要不同]

port = 3306

# 设置运行用户 user = mysql # 关闭监控

performance_schema = off

# 设置innodb 缓存大小 innodb_buffer_pool_size = 32M # 设置监听IP地址

bind_address = 0.0.0.0

# 关闭DNS 反向解析 skip-name-resolve = 0 **

[mysqld2]

datadir = /data/mysql_data2socket = /tmp/mysql.sock2 port = 3307 user = mysql performance_schema = off innodb_buffer_pool_size = 32M bind_address = 0.0.0.0 skip-name-resolve = 0

[mysqld3]

datadir = /data/mysql_data3socket = /tmp/mysql.sock3 port = 3308 user = mysql performance_schema = off innodb_buffer_pool_size = 32M bind_address = 0.0.0.0 skip-name-resolve = 0

[mysqld4]

datadir = /data/mysql_data4socket = /tmp/mysql.sock4 port = 3309 user = mysql performance_schema = off innodb_buffer_pool_size = 32M bind_address = 0.0.0.0 skip-name-resolve = 0

• 初始化各个实例 [ 初始化完成后会自带随机密码在输出日志中 ]

  [root@MySQL ~]# /usr/local/mysql/bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/data/mysql_data1
  [root@MySQL ~]# /usr/local/mysql/bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/data/mysql_data2
  [root@MySQL ~]# /usr/local/mysql/bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/data/mysql_data3
  [root@MySQL ~]# /usr/local/mysql/bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/data/mysql_data4

• 各实例开启 SSL 连接
  [root@MySQL ~]# /usr/local/mysql/bin/mysql_ssl_rsa_setup --user=mysql --basedir=/usr/local/mysql --datadir=/data/mysql_data1
  [root@MySQL ~]# /usr/local/mysql/bin/mysql_ssl_rsa_setup --user=mysql --basedir=/usr/local/mysql --datadir=/data/mysql_data2
  [root@MySQL ~]# /usr/local/mysql/bin/mysql_ssl_rsa_setup --user=mysql --basedir=/usr/local/mysql --datadir=/data/mysql_data3
  [root@MySQL ~]# /usr/local/mysql/bin/mysql_ssl_rsa_setup --user=mysql --basedir=/usr/local/mysql --datadir=/data/mysql_data4

*修改环境变量

echo "export PATH=$PATH:/usr/local/mysql/bin" >> /etc/profilesource /etc/profile

• 复制多实例脚本到服务管理目录下 [ /etc/init.d/ ]

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

• 添加脚本执行权限

  [root@MySQL ~]# chmod +x /etc/init.d/mysqld_multi

• 添加进service服务管理
  [root@MySQL ~]# chkconfig --add mysqld_multi

5. 启动测试
   • 查个多实例状态
     [root@MySQL ~]# /etc/init.d/mysqld_multi report
     Reporting MySQL servers
     MySQL server from group: mysqld1 is not running
     MySQL server from group: mysqld2 is not running
     MySQL server from group: mysqld3 is not running
     MySQL server from group: mysqld4 is not running

• 启动多实例

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

• 查看多实例状态

  Reporting MySQL servers
  MySQL server from group: mysqld1 is running
  MySQL server from group: mysqld2 is running
  MySQL server from group: mysqld3 is running
  MySQL server from group: mysqld4 is running

• 查看实例监听端口
  [root@MySQL ~]# netstat -lntp | grep mysqld
  tcp 0 0 0.0.0.0:3306 0.0.0.0: LISTEN 2673/mysqld
  tcp 0 0 0.0.0.0:3307 0.0.0.0: LISTEN 2676/mysqld
  tcp 0 0 0.0.0.0:3308 0.0.0.0: LISTEN 2679/mysqld
  tcp 0 0 0.0.0.0:3309 0.0.0.0: LISTEN 2682/mysqld

6. 连接测试