简单来说就是在一台机器上开启多个不同的服务端口（3306,3307）运行多个MySQL服务进程，共用一套安装程序，这些服务进程通过不同的socket监听不同的服务端口来提供各自的服务。
环境设置
1 关闭防火墙
systemctl stop firewalld.service && systemctl disable firewalld.service
2 关闭selinux
sed -i ‘s/SELINUX=enforcing/SELINUX=disabled/‘ /etc/selinux/config
grep SELINUX=disabled /etc/selinux/config
3 设置计算机名
hostnamectl set-hostname MySQLmu.test.com
4 删除mariadb数据库
rpm -qa mariadb
rpm -e --nodeps mariadb-libs-5.5.60-1.el7_5.x86_64
5 重新启动系统
reboot
编译安装MySQL
1 安装依赖
yum -y install gcc-c++ ncurses-devel cmake make perl gcc autoconf automake zlib libxml libgcrypt libtool bison lrzsz
2 下载源码
https://dev.MySQL.com/downloads/MySQL/
Select Operating System: Source Code
Select OS Version:Generic Linux
3 下载带boost库的源码
wget --no-check-certificate http://sourceforge.net/projects/boost/files/boost/1.59.0/boost_1_59_0.tar.gz
wget https://dev.MySQL.com/get/Downloads/MySQL-5.7/MySQL-5.7.26.tar
添加用户和组
groupadd -r MySQL && useradd -r -g MySQL -s /sbin/nologin -M MySQL
解压
tar -zxvf boost_1_59_0
tar -zxvf MySQL-5.7.26
1 添加文件夹并赋予权限
mkdir -p /usr/local/MySQL/tmp
chown -R MySQL:MySQL /usr/local/MySQL
2 创建文件夹可以批量创建
mkdir -pv /data/MySQL/{3306,3307}/{pid,cnf,data,sockt,tmp,log,log-bin}
chown -R MySQL:MySQL /data/MySQL
find /data/ -type f -name "MySQL" |xargs chmod +x
find /data/ -type f -name "MySQL" |xargs ls -l
3 解压文件包
tar -zxvf MySQL-5.7.26.tar.gz && tar -zxvf boost_1_59_0.tar.gz
cd MySQL-5.7.26/
cmake . -DCMAKE_INSTALL_PREFIX=/usr/local/MySQL \
-DMYSQL_DATADIR=/data/MySQL \
-DWITH_BOOST=../boost_1_59_0 \
-DSYSCONFDIR=/etc \
-DMYSQL_UNIX_ADDR=/usr/local/MySQL/tmp/MySQL.sock \
-DWITH_INNOBASE_STORAGE_ENGINE=1 \
-DWITH_PARTITION_STORAGE_ENGINE=1 \
-DWITH_FEDERATED_STORAGE_ENGINE=1 \
-DWITH_BLACKHOLE_STORAGE_ENGINE=1 \
-DWITH_MYISAM_STORAGE_ENGINE=1 \
-DENABLED_LOCAL_INFILE=1 \
-DENABLE_DTRACE=0 \
-DDEFAULT_CHARSET=utf8mb4 \
-DDEFAULT_COLLATION=utf8mb4_general_ci \
-DWITH_EMBEDDED_SERVER=1
4 编译安装
make -j$(cat /proc/cpuinfo| grep "processor"| wc -l) && make install
ls -lrt /usr/local/MySQL
cp /usr/local/MySQL/support-files/MySQL.server /etc/init.d/MySQLd
chmod +x /etc/init.d/MySQLd
echo -e ‘\n\nexport PATH=/usr/local/MySQL/bin:$PATH\n‘ >> /etc/profile && source /etc/profile
2.2.7.4设置配置文件1
3306实例配置文件
vim /MySQLdata/3306/cnf/my3306.cnf
[MySQLd]
#innodb_buffer_pool_size = 128M
#join_buffer_size = 128M
#sort_buffer_size = 2M
#read_rnd_buffer_size = 2M
user=MySQL
port=3306
datadir=/data/MySQL/3306/data
socket=/data/MySQL/3306/sockt/MySQL.sock3306
symbolic-links=0
pid-file=/data/MySQL/3306/pid/MySQLd.pid
log-error=/data/MySQL/3306/log/MySQLd.log
[MySQLd_safe]
log-error=/data/MySQL/3306/log/MySQLd.log
3307实例配置文件
vim /MySQLdata/3307/cnf/my3307.cnf
[MySQLd]
#innodb_buffer_pool_size = 128M
#join_buffer_size = 128M
#sort_buffer_size = 2M
#read_rnd_buffer_size = 2M
user=MySQL
port=3307
datadir=/data/MySQL/3307/data
socket=/data/MySQL/3307/sockt/MySQL.sock3307
symbolic-links=0
pid-file=/data/MySQL/3307/pid/MySQLd.pid
log-error=/data/MySQL/3307/log/MySQLd.log
[MySQLd_safe]
log-error=/data/MySQL/3307/log/MySQLd.log
chown -R MySQL:MySQL /usr/local/MySQL
chown -R MySQL:MySQL /data/MySQL
实列初始化
MySQLd --defaults-file=/data/MySQL/3306/cnf/my3306.cnf --initialize --basedir=/usr/local/MySQL/ --datadir=/data/MySQL/3306/data/
MySQLd --defaults-file=/data/MySQL/3307/cnf/my3307.cnf --initialize --basedir=/usr/local/MySQL/ --datadir=/data/MySQL/3307/data/
查找零时密码
cat /data/MySQL/3306/log/MySQLd.log |grep password =LoLOQmp1Nx
cat /data/MySQL/3307/log/MySQLd.log |grep password ht,F:IWo3GX
使用配置文件启动MySQL
MySQLd_safe --defaults-file=/data/MySQL/3306/cnf/my3306.cnf&
MySQLd_safe --defaults-file=/data/MySQL/3307/cnf/my3307.cnf&
查看MySQL启动
ps -ef|grep MySQLd
netstat -lntup |grep 330
使用MySQL.sock链接实例，输入之前前的零时密码登录MySQL
MySQL -uroot -p -S /data/MySQL/3306/sockt/MySQL.sock3306
修改密码
set password for root@localhost = password(‘P@ssw0rd‘);
use MySQL;
update user set host=‘%‘ where user=‘root‘;
flush privileges;
查看MySQL账号状态
select user,host from MySQL.user;
使用MySQL.sock链接实例，输入之前前的零时密码登录MySQL
MySQL -uroot -p -S /data/MySQL/3307/sockt/MySQL.sock3307
set password for root@localhost = password(‘P@ssw0rd‘);
use MySQL;
update user set host=‘%‘ where user=‘root‘;
flush privileges;
select user,host from MySQL.user;
停止服务
MySQLadmin -uroot -p -S /data/MySQL/3306/sockt/MySQL.sock3306 shutdown
停止3306实例:
MySQLadmin -uroot -p -S /data/MySQL/3306/sockt/MySQL.sock3306 shutdown
启动MySQL服务
启动3306实例:
MySQLd_safe --defaults-file=/data/MySQL/3306/cnf/my3306.cnf&
链接MySQL
连接3306实例:
MySQL -uroot -p -S /data/MySQL/3306/sockt/MySQL.sock3306
设置配置文件2
配置文件
vi /etc/my.cnf
[mysqld_multi]
mysqld = /usr/local/mysql/bin/mysqld
mysqladmin = /usr/local/mysql/bin/mysqladmin
log = /tmp/mysql_multi.log
[mysqld1]
datadir = /data/mysql_data1
socket = /tmp/mysql.sock1
log_error = /data/mysql/mysql_data1/mysql1-error.log
port = 3306
user = mysql
performance_schema = off
innodb_buffer_pool_size = 32M
bind_address = 0.0.0.0
skip-name-resolve = 0
[mysqld2]
datadir = /data/mysql_data2
socket = /tmp/mysql.sock2
log_error = /data/mysql/mysql_data2/mysq2-error.log
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
log_error = /data/mysql/mysql_data3/mysq3-error.log
port = 3308
user = mysql
performance_schema = off
innodb_buffer_pool_size = 32M
bind_address = 0.0.0.0
skip-name-resolve = 0
实列初始化
/usr/local/mysql/bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/data/mysql_data1 出现随机密码 6FhFI7d&A;di
/usr/local/mysql/bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/data/mysql_data2 出现随机密码 ysDafadvC9%=
/usr/local/mysql/bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/data/mysql_data3 出现随机密码 dSrk*yDDy4/:
修改密码
mysql -uroot -p -S /data/mysql/3307/sockt/mysql.sock3307
set password for root@localhost = password(‘P@ssw0rd‘);
use mysql;
update user set host=‘%‘ where user=‘root‘;
flush privileges;
select user,host from mysql.user;
向启动项添加启动文件
cp /usr/local/mysql/support-files/mysqld_multi.server /etc/init.d/mysqld_multi
chmod +x /etc/init.d/mysqld_multi
chkconfig --add mysqld_multi
mysqld_multi start
mysqld_multi report
启动实例
mysqld_multi start 3306
mysqld_multi start 3307
mysqld_multi start 3308
连接实例
mysql -uroot -S /tmp/mysql.sock1 -p
mysql -uroot -S /tmp/mysql.sock2 -p
mysql -uroot -S /tmp/mysql.sock3 -p
set password for 用户名@localhost = password(‘新密码‘);
set password for root@local = password(‘P@ssw0rd‘);
停止实例
mysqladmin -u root -pP@ssw0rd -S /tmp/mysql.sock1 shutdown
mysqladmin -u root -pP@ssw0rd -S /tmp/mysql.sock2 shutdown
mysqladmin -u root -pP@ssw0rd -S /tmp/mysql.sock3 shutdown
netstat -lntup |grep 330
grep log-error mysq3-error.log | tail -100