MySQL8.0安装与配置

一、下载MySQL

进入官网：https://downloads.mysql.com/archives/community/选择合适的版本：

通过wget进行下载：

[root@iZwz9ba9y5k8ij7xf2boohZ software]# wget https://downloads.mysql.com/archives/get/p/23/file/  
mysql-8.0.13-linux-glibc2.12-x86_64.tar.xz

二、安装与配置

1、创建mysql用户和组

# 创建MySQL用户
[root@iZwz9ba9y5k8ij7xf2boohZ software]#useradd mysql -s /sbin/nologin -M -g mysql

# 创建MySQL组
[root@iZwz9ba9y5k8ij7xf2boohZ software]#groupadd mysql

2、解压

[root@iZwz9ba9y5k8ij7xf2boohZ software]# tar-xf mysql-8.0.13-linux-glibc2.12-x86_64.tar.xz 

3、安装

# 1、重命名
[root@iZwz9ba9y5k8ij7xf2boohZ software]# mv mysql-8.0.13-linux-glibc2.12-x86_64 mysql

# 2、拷贝到/usr/local下
[root@iZwz9ba9y5k8ij7xf2boohZ software]# mv mysql /usr/local/

#3、 进入到/usr/local/mysql目录下，进行授权
[root@iZwz9ba9y5k8ij7xf2boohZ mysql]# chown -R mysql:mysql ./

# 4、初始化
[root@iZwz9ba9y5k8ij7xf2boohZ mysql]# ./bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql 
--datadir=/usr/local/mysql/data

注意：

• 不需要提前创建好data目录，否则会出现[ERROR] [MY-010457] [Server] --initialize specified but the data directory has files in it. Aborting问题
• 会生成临时密码，记得保存

4、配置

• my.cnf

进入到/usr/local/mysql/support-files目录中：

# 1、创建my-default.cnf文件
[root@iZwz9ba9y5k8ij7xf2boohZ support-files]# touch my-default.cnf

# 2、赋予文件权限
[root@iZwz9ba9y5k8ij7xf2boohZ support-files]# chmod 777 my-default.cnf 

# 3、将其覆盖/etc/my.cnf
[root@iZwz9ba9y5k8ij7xf2boohZ support-files]# cp my-default.cnf /etc/my.cnf 

# 4、写入对应配置
[root@iZwz9ba9y5k8ij7xf2boohZ support-files]# vim /etc/my.cnf 

vim /etc/my.cnf

[mysqld]
 
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
 
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
 
# These are commonly set, remove the # and set as required.
basedir = /usr/local/mysql
datadir = /usr/local/mysql/data
socket = /tmp/mysql.sock
log-error = /usr/local/mysql/data/error.log
pid-file = /usr/local/mysql/data/mysql.pid
tmpdir = /tmp
port = 5186
#lower_case_table_names = 1
# server_id = .....
# socket = .....
#lower_case_table_names = 1
max_allowed_packet=32M
default-authentication-plugin = mysql_native_password
#lower_case_file_system = on
#lower_case_table_names = 1
log_bin_trust_function_creators = ON
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M 
 
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

• 启动配置

# 启动文件拷贝
[root@iZwz9ba9y5k8ij7xf2boohZ support-files]# cp mysql.server /etc/init.d/mysql
# 服务可执行权限
[root@iZwz9ba9y5k8ij7xf2boohZ support-files]# chmod +x /etc/init.d/mysql

5、启动MySQL

# 启动MySQL
[root@iZwz9ba9y5k8ij7xf2boohZ support-files]# /etc/init.d/mysql start
Starting MySQL.Logging to '/usr/local/mysql/data/error.log'.
.                                                          [  OK  ]

# 查看
[root@iZwz9ba9y5k8ij7xf2boohZ ~]# netstat -tunlp|grep 5186
tcp6       0      0 :::5186                 :::*                    LISTEN      7249/mysqld         

6、客户端环境变量配置

[root@iZwz9ba9y5k8ij7xf2boohZ bin]# echo 'export PATH=/usr/local/mysql/bin:$PATH' >> /etc/profile
[root@iZwz9ba9y5k8ij7xf2boohZ bin]# source /etc/profile

7、修改密码

 首先使用临时生成的密码进行登录，然后修改密码：

# 登录
[root@iZwz9ba9y5k8ij7xf2boohZ bin]# mysql -uroot -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 8
Server version: 8.0.13

# 修改密码
mysql> alter user 'root'@'localhost' identified by '********';
Query OK, 0 rows affected (0.08 sec)

此时，可以退出，再使用新密码进行登录了。

8、远程登录

mysql> select host,user from mysql.user;
+-----------+------------------+
| host      | user             |
+-----------+------------------+
| localhost | mysql.infoschema |
| localhost | mysql.session    |
| localhost | mysql.sys        |
| localhost | root             |
+-----------+------------------+
4 rows in set (0.00 sec)

mysql> update mysql.user set host='%' where user='root';
Query OK, 1 row affected (0.01 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

参考：https://blog.csdn.net/atongmu2017/article/details/90610444