centos 7系统安装mysql 8.0

一、关闭防火墙
[root@node01 ~]# systemctl disable firewalld
[root@node01 ~]# systemctl stop firewalld
[root@node01 ~]# systemctl status firewalld
● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
   Active: inactive (dead)
     Docs: man:firewalld(1)

二、关闭selinux
[root@node01 ~]# vi /etc/selinux/config
SELINUX=disabled
[root@node01 ~]# getenforce
Disabled

临时关闭selinux
[root@node01 ~]# setenforce 0
setenforce: SELinux is disabled

三、卸载centos自带数据库
[root@node01 ~]# rpm -qa | grep mariadb | xargs -i yum remove -y {}
Loaded plugins: fastestmirror
Resolving Dependencies
--> Running transaction check
---> Package mariadb-libs.x86_64 1:5.5.56-2.el7 will be erased
--> Processing Dependency: libmysqlclient.so.18()(64bit) for package: 2:postfix-2.10.1-6.el7.x86_64
--> Processing Dependency: libmysqlclient.so.18(libmysqlclient_18)(64bit) for package: 2:postfix-2.10.1-6.el7.x86_64
--> Running transaction check
---> Package postfix.x86_64 2:2.10.1-6.el7 will be erased
--> Finished Dependency Resolution

Dependencies Resolved

=======================================================================================
 Package              Arch           Version                   Repository         Size
=======================================================================================
Removing:
 mariadb-libs         x86_64         1:5.5.56-2.el7            @anaconda         4.4 M
Removing for dependencies:
 postfix              x86_64         2:2.10.1-6.el7            @anaconda          12 M

Transaction Summary
=======================================================================================
Remove  1 Package (+1 Dependent package)

Installed size: 17 M
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Erasing    : 2:postfix-2.10.1-6.el7.x86_64                                       1/2
  Erasing    : 1:mariadb-libs-5.5.56-2.el7.x86_64                                  2/2
  Verifying  : 1:mariadb-libs-5.5.56-2.el7.x86_64                                  1/2
  Verifying  : 2:postfix-2.10.1-6.el7.x86_64                                       2/2

Removed:
  mariadb-libs.x86_64 1:5.5.56-2.el7

Dependency Removed:
  postfix.x86_64 2:2.10.1-6.el7

Complete!
[root@node01 ~]# rpm -qa | grep mariadb
[root@node01 ~]#

四、添加用户组及用户
[root@node01 ~]# groupadd mysql
[root@node01 ~]# useradd -g mysql mysql
[root@node01 ~]# id mysql
uid=1000(mysql) gid=1000(mysql) groups=1000(mysql)
[root@node01 ~]# passwd mysql
Changing password for user mysql.
New password:
BAD PASSWORD: The password is shorter than 8 characters
Retype new password:
passwd: all authentication tokens updated successfully.
[root@node01 ~]#

五、创建mysql相关目录
[root@node01 ~]# mkdir -p /data/mysql3306/data
[root@node01 ~]# mkdir -p /data/mysql3306/binlog
[root@node01 ~]# chown -R mysql.mysql /data*

六、下载mysql8.0安装包，上传并解压

下载地址：
https://downloads.mysql.com/archives/get/p/23/file/mysql-8.0.18-linux-glibc2.12-x86_64.tar

解压mysql安装包:
[mysql@node01 ~]$ tar -xvf mysql-8.0.18-linux-glibc2.12-x86_64.tar.xz

七、创建mysql安装包软连接
[root@node01 data]# ln -s /data/mysql-8.0.18-linux-glibc2.12-x86_64 /usr/local/mysql
[root@node01 data]# chown -R mysql.mysql /usr/local/mysql*

八、创建my.cnf参数文件
[root@node01 data]# vi /etc/my.cnf
[client]
port=3306
socket=/tmp/mysql.sock

[mysqld]
port=3306
user=mysql
server_id=1
socket=/tmp/mysql.sock
basedir=/usr/local/mysql
datadir=/data/mysql3306/data
log-error=/data/mysql3306/data/error.log
log_bin=/data/mysql3306/binlog/mysql-bin

九、配置用户环境变量
[mysql@node01 ~]$ vi .bash_profile
# .bash_profile

# Get the aliases and functions
if [ -f ~/.bashrc ]; then
        . ~/.bashrc
fi

# User specific environment and startup programs

PATH=$PATH:$HOME/.local/bin:$HOME/bin

export PATH
export MYSQL_HOME=/usr/local/mysql
export PATH=$PATH:$MYSQL_HOME/bin

[root@node02 ~]# vi /etc/profile
export MYSQL_HOME=/usr/local/mysql
export PATH=$PATH:$MYSQL_HOME/bin

十、初始化mysql数据库
[mysql@node01 ~]$ mysqld --initialize-insecure --user=mysql --basedir=/usr/local/mysql --datadir=/data/mysql3306/data

十一、添加mysql服务
[root@node01 data]# cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld

十二、启动mysql数据库、登录数据库
[mysql@node01 ~]$ /etc/init.d/mysqld start
Starting MySQL.. SUCCESS!
[mysql@node01 ~]$ mysql -uroot -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 8.0.18 MySQL Community Server - GPL

Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
4 rows in set (0.00 sec)

mysql>

十三、配置mysql数据库自动启动
[root@node01 data]# chkconfig --add mysqld
[root@node01 data]# chkconfig --list

Note: This output shows SysV services only and does not include native
      systemd services. SysV configuration data might be overridden by native
      systemd configuration.

      If you want to list systemd services use 'systemctl list-unit-files'.
      To see services enabled on particular target use
      'systemctl list-dependencies [target]'.

mysqld          0:off   1:off   2:on    3:on    4:on    5:on    6:off
netconsole      0:off   1:off   2:off   3:off   4:off   5:off   6:off
network         0:off   1:off   2:on    3:on    4:on    5:on    6:off