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mkdir -p /mysql/330{7,8,9}/data

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cat > /mysql/3307/my.cnf <<EOF
[mysqld]
basedir=/application/mysql   #mysql安装路径
datadir=/mysql/3307/data     #mysql数据存放目录
socket=/mysql/3307/mysql.sock  #mysql的socket
log_error=/mysql/3307/mysql.log
port=3307
server_id=7
log_bin=/mysql/3307/mysql-bin
EOF

cat > /mysql/3308/my.cnf <<EOF
[mysqld]
basedir=/application/mysql
datadir=/mysql/3308/data
socket=/mysql/3308/mysql.sock
log_error=/mysql/3308/mysql.log
port=3308
server_id=8
log_bin=/mysql/3308/mysql-bin
EOF

cat > /mysql/3309/my.cnf <<EOF
[mysqld]
basedir=/application/mysql
datadir=/mysql/3309/data
socket=/mysql/3309/mysql.sock
log_error=/mysql/3309/mysql.log
port=3309
server_id=9
log_bin=/mysql/3309/mysql-bin
EOF

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mysqld --initialize-insecure  --user=mysql --datadir=/mysql/3307/data --basedir=/application/mysql
mysqld --initialize-insecure  --user=mysql --datadir=/mysql/3308/data --basedir=/application/mysql
mysqld --initialize-insecure  --user=mysql --datadir=/mysql/3309/data --basedir=/application/mysql

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cd /etc/systemd/system
cp mysqld.service mysqld3307.service
cp mysqld.service mysqld3308.service
cp mysqld.service mysqld3309.service

vim mysqld3307.service
ExecStart=/app/mysql/bin/mysqld  --defaults-file=/mysql/3307/my.cnf
vim mysqld3308.service
ExecStart=/app/mysql/bin/mysqld  --defaults-file=/mysql/3308/my.cnf
vim mysqld3309.service
ExecStart=/app/mysql/bin/mysqld  --defaults-file=/mysql/3309/my.cnf

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chown -R mysql.mysql /mysql/*

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systemctl start mysqld3307.service
systemctl start mysqld3308.service
systemctl start mysqld3309.service

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netstat -lnp|grep 330
mysql -S /mysql/3307/mysql.sock -e "select @@server_id"
mysql -S /mysql/3308/mysql.sock -e "select @@server_id"
mysql -S /mysql/3309/mysql.sock -e "select @@server_id"