Mysql 5.7.21单机多实例安装

下载MySQL 5.7 二制包
[root@MySQL ~]# wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.21-linux-glibc2.5-x86_64.tar.gz

解压 MySQL 5.7 二进制包到指定目录
[root@MySQL ~]# tar zxvf mysql-5.7.21-linux-glibc2.5-x86_64.tar.gz -C /usr/local/

创建 MySQL 软链接
[root@MySQL ~]# ln -s /usr/local/mysql-5.7.21-linux-glibc2.5-x86_64 /usr/local/mysql

创建 MySQL 用户
[root@MySQL ~]# useradd -r -s /sbin/nologin 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‘ 
mkdir: created directory `/data/mysql_data1‘ 
mkdir: created directory `/data/mysql_data2‘ 
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
[root@MySQL ~]# chown root.mysql -R /usr/local/mysql-5.7.21-linux-glibc2.5-x86_64

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_data2
socket = /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_data3
socket = /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_data4
socket = /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

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