yum 安装的mysql8多实例

1. 初始化的时候，不需要指定basedir。yum安装的默认会去/usr/share/mysql-8.0/，指定basedir后会报错Can't find error-message file。
   初始化命令：

# /usr/sbin/mysqld --defaults-file=/etc/sitmy.cnf --user=mysql  --datadir=/var/lib/mysql3307/data --initialize-insecure

2. mysql8的配置需要增加mysqlx插件配置：
   mysqlx_port = 33070 和 mysqlx_socket=mysqlx.sock路径

# grep -v "#" /etc/sitmy.cnf 
[client]
port=3307
[mysqld]
port=3307
mysqlx_port = 33070
lower_case_table_names = 1
datadir=/var/lib/mysql3307/data
socket=/var/lib/mysql3307/mysql.sock
mysqlx_socket=/var/lib/mysql3307/mysqlx.sock

log-error=/var/log/mysqld3307.log
pid-file=/var/run/mysqld/mysqld3307.pid
[root@vonedao1 data]# pwd
/var/lib/mysql3307/data

3 . 启动命令：

# /usr/sbin/mysqld --defaults-file=/etc/sitmy.cnf --user=mysql&

4. 检查
   

5. 登录

# mysql -uroot -S /var/lib/mysql3307/mysql.sock
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 9
Server version: 8.0.19 MySQL Community Server - GPL

Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
4 rows in set (0.01 sec)

mysql> 

6. 添加用户并授权

mysql> use mysql;
mysql> create user 'sit'@'%' identified by '密码';
mysql> ALTER USER 'sit'@'%' IDENTIFIED BY '密码' PASSWORD EXPIRE NEVER;
mysql> ALTER USER 'sit'@'%' IDENTIFIED WITH mysql_native_password BY '密码';
mysql> grant all privileges on *.* to 'sit'@'%';
mysql> flush privileges;