centos7.6 安裝MySQL8.0（轉載）（二）

創建mysql用戶、用戶組

groupadd mysql
useradd -g mysql mysql
passwd mysql

卸載系統自帶的mariadb

#查詢 
rpm -qa|grep mariadb

返回 mariadb-libs-5.5.60-1.el7_5.x86_64

#卸載
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

#強行卸載
rpm -e --nodeps mariadb-libs-5.5.60-1.el7_5.x86_64

下載mysql rpm

下載mysql rpm
選擇
Red Hat Enterprise Linux / Oracle Linux
Red Hat Enterprise Linux 7 / Oracle Linux 7 (x86, 64-bit)
RPM Bundle
取得下載地址
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

安裝

安裝依賴

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

必要安裝，注意順序，有依賴關係

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

非必要安裝，注意順序，有依賴關係

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

初始化數據庫

mysqld --initialize --console

修改目錄權限

此步驟必須在初始化數據庫之後！！！
安裝完默認是mysql 用戶、用戶組的權限，如果沒有，則更改

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

用root用戶啓動

systemctl start mysqld

若啓動失敗,查看日誌

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

查看初始化時的密碼

啓動成功後可以查看初始化密碼隨機生成的

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

登錄MySQL修改mysql用戶密碼

mysql -u root -p

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

#遠程設置
use mysql;
update user set host='%' where user='root';

#授權用戶名的權限，賦予任何主機訪問數據的權限
grant all privileges ON *.* to 'root'@'%' with grant option;
flush privileges;

新增mysql用戶,創建數據庫,授權

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

centos7防火牆開放端口

# 開放3306端口
firewall-cmd --zone=public --add-port=3306/tcp --permanent
#重載
firewall-cmd --reload
#查看狀態
firewall-cmd --list-all

阿里雲端口安全組設置

安全組說明
新增3306端口的新增【入方向】規則

生產環境

mysql_secure_installation

會做以下操作

• 爲root用戶設置密碼
• 刪除匿名賬號
• 取消root用戶遠程登錄
• 刪除test庫和對test庫的訪問權限
• 刷新授權表使修改生效

相關管理命令

#啓動mysql
systemctl start mysqld.service
#結束
systemctl stop mysqld.service
#重啓
systemctl restart mysqld.service
#開機自啓
systemctl enable mysqld.service