CentOS7.4安装配置mysql8 TAR免安装版

下载mysql:
https://dev.mysql.com/downloads/mysql/

解压tar.xz文件：xz -d mysql-8.0.17-linux-glibc2.12-x86_64.tar.xz

1.解压包
tar -xvf mysql-8.0.17-linux-glibc2.12-x86_64.tar

mv mysql-8.0.17-linux-glibc2.12-x86_64 /usr/local/mysql

yum install -y cmake bison bison-devel libaio-devel gcc gcc-c++ git  ncurses-devel

useradd -s /sbin/nologin mysql

4.初始化数据和指定安装目录和数据目录
/usr/local/mysql/bin/mysqld --initialize --console --skip-grant-tables --user=mysql --basedir=/usr/local/mysql/ --datadir=/mnt/mysql_data/

5.检查目录，并配置权限
mkdir /mnt/mysql_data
mkdir /var/log/mysql
mkdir /var/lib/mysql
touch /mnt/mysql_data/mysql.pid
touch /var/lib/mysql/mysql.sock

chown -R mysql:mysql /var/lib/mysql/
chown -R mysql:mysql /var/log/mysql
chown -R mysql:mysql /mnt/mysql_data
chmod 777 /var/lib/mysql/mysql.sock
chmod 777 /mnt/mysql_data/mysql.pid

6复制启动文件
cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld
chmod +x /etc/init.d/mysqld

7.修改启动路径
vi /etc/init.d/mysqld

basedir=/usr/local/mysql
datadir=/mnt/mysql_data

8.增加环境变量 （最下面添加）
vi /etc/profile
export PATH=$PATH:/usr/local/mysql/bin

9.刷新配置文件
source /etc/profile

修改配置文件

vi /etc/my.cnf

[client]
port = 3306
default-character-set = utf8
socket = /var/lib/mysql/mysql.sock

[mysqld]
basedir = /usr/local/mysql
datadir = /mnt/mysql_data
socket = /var/lib/mysql/mysql.sock
log-error = /var/log/mysql/error.log
pid-file = /mnt/mysql_data/mysql.pid
max_connections = 300
character-set-server = utf8
default-storage-engine = INNODB
lower_case_table_names = 1
max_allowed_packet = 16M
user = mysql
tmpdir = /tmp
default_authentication_plugin = mysql_native_password

[mysql]
default-character-set = utf8
socket = /var/lib/mysql/mysql.sock

11.添加开启自启
chkconfig --add mysqld
chkconfig mysqld on

/etc/init.d/mysqld start

netstat -anpt

13.修改root默认密码并授权远程访问:
在/etc/my.cnf 最后增加:  skip-grant-tables = 1
重启MySQL: /etc/rc.d/init.d/mysqld restart

mysql -uroot -p
use mysql;
update user set host = '%', authentication_string = '' where user='root';
flush privileges;

select host, user, authentication_string, plugin from user;

删除/etc/my.cnf文件中的 skip-grant-tables = 1
重启MySQL: /etc/rc.d/init.d/mysqld restart

ALTER USER USER() IDENTIFIED BY 'Tmp123456';

暂时关闭防火墙测试远程连接：

systemctl stop firewalld.service #停止firewall
systemctl disable firewalld.service #禁止firewall开机启动
systemctl status iptables