MySQL8.0安装

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)