centos7.6 安装MySQL8.0（转载）（二）

创建mysql用户、用户组

groupadd mysql
useradd -g mysql mysql
passwd mysql

卸载系统自带的mariadb

#查询 
rpm -qa|grep mariadb

返回 mariadb-libs-5.5.60-1.el7_5.x86_64

#卸载
rpm -e mariadb-libs-5.5.60-1.el7_5.x86_64

返回

error: Failed dependencies:
        libmysqlclient.so.18()(64bit) is needed by (installed) postfix-2:2.10.1-7.el7.x86_64
        libmysqlclient.so.18(libmysqlclient_18)(64bit) is needed by (installed) postfix-2:2.10.1-7.el7.x86_64

#强行卸载
rpm -e --nodeps mariadb-libs-5.5.60-1.el7_5.x86_64

下载mysql rpm

下载mysql rpm
选择
Red Hat Enterprise Linux / Oracle Linux
Red Hat Enterprise Linux 7 / Oracle Linux 7 (x86, 64-bit)
RPM Bundle
取得下载地址
https://cdn.mysql.com//Downlo...

wget "https://cdn.mysql.com//Downloads/MySQL-8.0/mysql-8.0.13-1.el7.x86_64.rpm-bundle.tar"

tar -xvf mysql-8.0.13-1.el7.x86_64.rpm-bundle.tar

安装

安装依赖

yum install -y libaio.x86_64 libaio-devel.x86_64 
yum install -y openssl-devel.x86_64 openssl.x86_64 
yum install -y perl.x86_64 perl-devel.x86_64 
yum install -y perl-JSON.noarch 
yum install -y autoconf

必要安装，注意顺序，有依赖关系

rpm -ivh mysql-community-common-8.0.13-1.el7.x86_64.rpm
rpm -ivh mysql-community-libs-8.0.13-1.el7.x86_64.rpm
rpm -ivh mysql-community-client-8.0.13-1.el7.x86_64.rpm
rpm -ivh mysql-community-server-8.0.13-1.el7.x86_64.rpm

非必要安装，注意顺序，有依赖关系

rpm -ivh mysql-community-libs-compat-8.0.13-1.el7.x86_64.rpm
rpm -ivh mysql-community-embedded-compat-8.0.13-1.el7.x86_64.rpm
rpm -ivh mysql-community-devel-8.0.13-1.el7.x86_64.rpm
rpm -ivh mysql-community-test-8.0.13-1.el7.x86_64.rpm

初始化数据库

mysqld --initialize --console

修改目录权限

此步骤必须在初始化数据库之后！！！
安装完默认是mysql 用户、用户组的权限，如果没有，则更改

chown -R mysql:mysql /var/lib/mysql/

用root用户启动

systemctl start mysqld

若启动失败,查看日志

tail -n 100 /var/log/mysqld.log

查看初始化时的密码

启动成功后可以查看初始化密码随机生成的

cat /var/log/mysqld.log | grep password

登录MySQL修改mysql用户密码

mysql -u root -p

#修改密码
alter user 'root'@'localhost' identified by  'yourpassword';

#远程设置
use mysql;
update user set host='%' where user='root';

#授权用户名的权限，赋予任何主机访问数据的权限
grant all privileges ON *.* to 'root'@'%' with grant option;
flush privileges;

新增mysql用户,创建数据库,授权

create user 'flame'@'%' identified by 'password';
create database flame;
grant all privileges on flame.* to 'flame'@'%';
flush privileges;

centos7防火墙开放端口

# 开放3306端口
firewall-cmd --zone=public --add-port=3306/tcp --permanent
#重载
firewall-cmd --reload
#查看状态
firewall-cmd --list-all

阿里云端口安全组设置

安全组说明
新增3306端口的新增【入方向】规则

生产环境

mysql_secure_installation

会做以下操作

• 为root用户设置密码
• 删除匿名账号
• 取消root用户远程登录
• 删除test库和对test库的访问权限
• 刷新授权表使修改生效

相关管理命令

#启动mysql
systemctl start mysqld.service
#结束
systemctl stop mysqld.service
#重启
systemctl restart mysqld.service
#开机自启
systemctl enable mysqld.service