二进制部署MySQL8

下载安装包:

wget https://downloads.mysql.com/archives/get/p/23/file/mysql-8.0.30-linux-glibc2.12-x86_64.tar.xz

下载依赖：

yum -y install libaio

解压安装：

tar -xvf mysql-8.0.30-linux-glibc2.12-x86_64.tar.xz -C /usr/local/
cd /usr/local
mv mysql-8.0.30-linux-glibc2.12-x86_64/  mysql

创建mysql用户及组:

groupadd mysql
useradd -g mysql mysql

创建数据及日志目录：

mkdir /var/lib/mysql
chown -R mysql:mysql /var/lib/mysql
mkdir /var/log/mysql
chown -R mysql:mysql /var/log/mysql
mkdir /var/run/mysql
chown -R mysql:mysql /var/run/mysql

创建MySQL配置文件：

vim /etc/my.cnf
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
symbolic-links=0
user=mysql
port=3306
[mysqld_safe]
log-error=/var/log/mysql/mysql.log
pid-file=/var/run/mysql/mysql.pid
!includedir /etc/my.cnf.d

配置MySQL环境变量：

vim /etc/profile
export PATH=$PATH:/usr/local/mysql/bin
source /etc/profile

初始化MySQL：

/usr/local/mysql/bin/mysqld  --defaults-file=/etc/my.cnf --initialize-insecure --user=mysql

启动MySQL：

/usr/local/mysql/bin/mysqld_safe --defaults-file=/etc/my.cnf &

使用system管理MySQL（推荐）：

vim /usr/lib/systemd/system/mysql.service
[Unit]
Description=mysql
After=network.target remote-fs.target nss-lookup.target
[Service]
Type=forking
ExecStart=/usr/local/mysql/support-files/mysql.server start
ExecReload=/usr/local/mysql/support-files/mysql.server restart
ExecStop=/usr/local/mysql/support-files/mysql.server stop
PrivateTmp=true
[Install]
WantedBy=multi-user.target

开机自启MySQL：
systemctl daemon-reload
systemctl enable --now mysql
登录MySQL并修改密码：

本地首次使用sock文件登录mysql是不需要密码的。

mysql -S /var/lib/mysql/mysql.sock

mysql> alter user 'root'@'localhost' identified by '123456';
mysql> flush privileges;

修改密码之后就不能用sock登录了

mysql -uroot -p
Enter password: 
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)

解决方法：

ln -s /var/lib/mysql/mysql.sock   /tmp/mysql.sock

授予用户权限. 必须先要创建用户, 才能授权!!

mysql> create user 'nagao'@'localhost' identified by '123456';
mysql> grant all privileges on *.*  to 'nagao'@'localhost' with grant option;