1. 转自https://www.jianshu.com/p/5e0062f6cf62
1. MyCAT基础架构图
image.png
2. MyCAT基础架构准备
2.1 环境准备：
两台虚拟机 db01 db02
每台创建四个mysql实例：3307 3308 3309 3310
2.2 删除历史环境：
pkill mysqld
rm -rf /data/330*
mv /etc/my.cnf /etc/my.cnf.bak
2.3 创建相关目录初始化数据
mkdir /data/33{07..10}/data -p
mysqld --initialize-insecure --user=mysql --datadir=/data/3307/data --basedir=/app/mysql
mysqld --initialize-insecure --user=mysql --datadir=/data/3308/data --basedir=/app/mysql
mysqld --initialize-insecure --user=mysql --datadir=/data/3309/data --basedir=/app/mysql
mysqld --initialize-insecure --user=mysql --datadir=/data/3310/data --basedir=/app/mysql
2.4 准备配置文件和启动脚本
========db01==============
cat >/data/3307/my.cnf<<EOF
[mysqld]
basedir=/app/mysql
datadir=/data/3307/data
socket=/data/3307/mysql.sock
port=3307
log-error=/data/3307/mysql.log
log_bin=/data/3307/mysql-bin
binlog_format=row
skip-name-resolve
server-id=7
gtid-mode=on
enforce-gtid-consistency=true
log-slave-updates=1
EOF
cat >/data/3308/my.cnf<<EOF
[mysqld]
basedir=/app/mysql
datadir=/data/3308/data
port=3308
socket=/data/3308/mysql.sock
log-error=/data/3308/mysql.log
log_bin=/data/3308/mysql-bin
binlog_format=row
skip-name-resolve
server-id=8
gtid-mode=on
enforce-gtid-consistency=true
log-slave-updates=1
EOF
cat >/data/3309/my.cnf<<EOF
[mysqld]
basedir=/app/mysql
datadir=/data/3309/data
socket=/data/3309/mysql.sock
port=3309
log-error=/data/3309/mysql.log
log_bin=/data/3309/mysql-bin
binlog_format=row
skip-name-resolve
server-id=9
gtid-mode=on
enforce-gtid-consistency=true
log-slave-updates=1
EOF
cat >/data/3310/my.cnf<<EOF
[mysqld]
basedir=/app/mysql
datadir=/data/3310/data
socket=/data/3310/mysql.sock
port=3310
log-error=/data/3310/mysql.log
log_bin=/data/3310/mysql-bin
binlog_format=row
skip-name-resolve
server-id=10
gtid-mode=on
enforce-gtid-consistency=true
log-slave-updates=1
EOF
cat >/etc/systemd/system/mysqld3307.service<<EOF