目标：一台服务器开多个MySQL实例
1、编译安装MySQL服务
到官网下周mysql源码包，然后通过脚本安装
#!/bin/bash
yum install -y ncurses-devel cmake gcc perl-Data-Dumper gcc-c++
useradd -s /sbin/nologin -r -M mysql
tar -xzf mysql-boost-5.7.13.tar.gz
cd mysql-5.7.13
cp support-files/my-default.cnf /etc/my.cnf
make clean
cmake -DCMAKE_INSTALL_PREFIX=/usr/local/mysql -DMYSQL_DATADIR=/data/mysql -DSYSCONFDIR=/etc -DEXTRA_CHARSETS=all -DDEFAULT_CHARSET=utf8 -DDEFAULT_COLLATION=utf8_general_ci -DWITH_INNOBASE_STORAGE_ENGINE=1 -DWITH_ARCHIVE_STORAGE_ENGINE=1 -DWITH_BLACKHOLE_STORAGE_ENGINE=1 -DWITH_FEDERATED_STORAGE_ENGINE=1 -DWITH_PARTITION_STORAGE_ENGINE=1 -DWITH_PERFSCHEMA_STORAGE_ENGINE=1 -DMYSQL_UNIX_ADDR=/tmp/mysqld.sock -DMYSQL_TCP_PORT=3306 -DWITH_DEBUG=0 -DENABLED_LOCAL_INFILE=1 -DDOWNLOAD_BOOST=1 -DWITH_BOOST=./boost/
make -j 2
make install
mkdir /data/mysql -p
chown mysql:mysql /data/mysql/
chown mysql:mysql -R /usr/local/mysql/
/usr/local/mysql/bin/mysqld --initialize --user=mysql
初始化完成之后，/data/mysql这里是一个实例
注意：初始化完成会提供一个初始root密码给你的，要记得改
添加mysql环境变量
[root@k8s mysql-5.7.13]# echo 'PATH=/usr/local/mysql/bin:$PATH' >> /etc/profile
[root@k8s mysql-5.7.13]# source /etc/profile
安装完成
2、修改my.cnf配置
[mysqld_multi]
mysqld = /usr/local/mysql/bin/mysqld
mysqladmin = /usr/local/mysql/bin/mysqladmin
log = /tmp/mysql_multi.log
#加入以上配置
#第一个实例，也就是刚安装完初始化的那个实例
[mysqld1]
basedir = /usr/local/mysql
datadir = /data/mysql
port = 3306
server_id = 101
socket = /tmp/mysqld.sock
user = mysql
#gtid配置，可选
gtid_mode=on
enforce_gtid_consistency=on
log-slave-updates=on
log-bin=mysql-bin
binlog_format=mixed
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
#第二个实例
[mysqld2]
basedir = /usr/local/mysql
datadir = /data/3307
port = 3307
server_id = 102
socket = /tmp/mysqld2.sock
user = mysql
#gtid配置，可选
gtid_mode=on
enforce_gtid_consistency=on
log-slave-updates=on
log-bin=mysql-bin
binlog_format=mixed
#从库设置只读
read-only
3、初始化另一个实例
指定data目录，执行命令初始化
/usr/local/mysql/bin/mysqld --initialize --user=mysql --datadir=/data/3307
初始化完成会提供一个初始root密码给你的，要记得改
4、启动实例
启动实例，通过mysqld_multi 启动
[root@k8s mysql-5.7.13]# mysqld_multi start
查看多实例状态
[root@k8s mysql-5.7.13]# mysqld_multi report
Reporting MySQL servers
MySQL server from group: mysqld1 is running
MySQL server from group: mysqld2 is running
启动完成
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