0.环境：

os : CentOS release 6.10 (Final)

Msyql: mysql8.0.14

1.下载官方打包好的二进制安装包：

#wget https://dev.mysql.com/get/Downloads/MySQL-8.0/mysql-8.0.14-linux-glibc2.12-x86_64.tar.xz

8.0采用了新的.xz压缩方式，文件很小，只有350M左右

2.解压：

tar -xJvf mysql-8.0.14-linux-glibc2.12-x86_64.tar.xz

3.放到/usr/local下

[root@iceman local]# ln -s mysql-8.0.14-linux-glibc2.12-x86_64 mysql

4.配置参数文件 /etc/my.cnf

[mysqld]

server-id = 1

port = 3306

datadir= /data/mysql

socket= /tmp/mysql.sock

pid-file = /tmp/mysqld.pid

log-error = error.log

slow-query-log= 1

slow-query-log-file= slow.log

long_query_time= 0.2

log-bin= bin.log

binlog_format=ROW

character-set-client-handshake = FALSE

character-set-server = utf8mb4

collation-server = utf8mb4_unicode_ci

init_connect ='SET NAMES utf8mb4'

innodb_buffer_pool_size= 200M

join_buffer_size = 10M

sort_buffer_size = 2M

read_rnd_buffer_size = 2M

log_timestamps= SYSTEM

5.创建用户和目录

[root@iceman ~]# groupadd mysql

[root@iceman ~]# useradd -r -g mysql -s /bin/false mysql ### /bin/false的意思是，禁止一起登录行为

[root@iceman ~]# mkdir -p /data/mysql

[root@iceman ~]# chown -R mysql:mysql /data/mysql/

[root@iceman ~]# chmod -R 775 /data/mysql/

6.初始化数据库：可以用--initialize-insecure不生成密码

[root@iceman bin]# pwd

/usr/local/mysql/bin

[root@iceman bin]# ./mysqld --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/data/mysql

初始化的时候遇到如下两个问题，用Yum 安装上即可。

./mysqld: error while loading shared libraries: libaio.so.1: cannot open shared object file: No such file or directory

yum -y install libaio

./mysqld: error while loading shared libraries: libnuma.so.1: cannot open shared object file: No such file or directory

yum -y install numactl

7.设置启动文件：

#cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql

--启动数据库：

# /etc/init.d/mysql start

Starting MySQL.Logging to '/data/mysql/error.log'.

SUCCESS!

8.修改环境变量

# vim /etc/profile.d/mysql.sh

export PATH=$PATH:/usr/local/mysql/bin

# source /etc/profile.d/mysql.sh

9.修改密码

mysql> show databases;

ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.

mysql>

mysql>

mysql> alter user root@localhost identified by 'Hellxxxeiyun!@#$';

Query OK, 0 rows affected (0.01 sec)