========================================================================================
Package 架构 版本 源 大小
========================================================================================
正在删除:
mariadb-libs x86_64 1:5.5.56-2.el7 @anaconda 4.4 M
为依赖而移除:
postfix x86_64 2:2.10.1-6.el7 @anaconda 12 M
事务概要
========================================================================================
移除 1 软件包 (+1 依赖软件包)
安装大小：17 M
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
正在删除 : 2:postfix-2.10.1-6.el7.x86_64 1/2
正在删除 : 1:mariadb-libs-5.5.56-2.el7.x86_64 2/2
验证中 : 1:mariadb-libs-5.5.56-2.el7.x86_64 1/2
验证中 : 2:postfix-2.10.1-6.el7.x86_64 2/2
删除:
mariadb-libs.x86_64 1:5.5.56-2.el7
作为依赖被删除:
postfix.x86_64 2:2.10.1-6.el7
完毕！
[root@xuegodslave ~]# yum -y install mysql-community-common-5.7.20-1.el7.x86_64.rpm
已加载插件：fastestmirror, langpacks
正在检查 mysql-community-common-5.7.20-1.el7.x86_64.rpm: mysql-community-common-5.7.20-1.el7.x86_64
mysql-community-common-5.7.20-1.el7.x86_64.rpm 将被安装
正在解决依赖关系
--> 正在检查事务
---> 软件包 mysql-community-common.x86_64.0.5.7.20-1.el7 将被 安装
--> 解决依赖关系完成
依赖关系解决
========================================================================================
Package 架构 版本 源 大小
========================================================================================
正在安装:
mysql-community-common
x86_64 5.7.20-1.el7 /mysql-community-common-5.7.20-1.el7.x86_64 2.5 M
事务概要
========================================================================================
安装 1 软件包
总计：2.5 M
安装大小：2.5 M
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
正在安装 : mysql-community-common-5.7.20-1.el7.x86_64 1/1
验证中 : mysql-community-common-5.7.20-1.el7.x86_64 1/1
已安装:
mysql-community-common.x86_64 0:5.7.20-1.el7
完毕！
如上所示已经安装成功第一个包，同样的操作把剩下的三个包安装完毕！（主从服务器均进行同样操作）
步骤三，启动MySQL服务，并进行MySQL服务初始化（主从服务器均进行同样操作）
[root@mysqlmaster ~]# systemctl start mysqld
[root@mysqlmaster ~]# grep "password" /var/log/mysqld.log 查询mysql初始密码，
2018-05-12T14:50:13.167604Z 1 [Note] A temporary password is generated for root@localhost: Lil=#:VjS8*Z （初始密码）
[root@mysqlmaster ~]# mysql_secure_installation
Securing the MySQL server deployment.
Enter password for user root: 这里输入：Lil=#:VjS8*Z
The existing password for the user account root has expired. Please set a new password.
New password: 输入新密码 zX@987Weqqrd1
Re-enter new password: 重复一遍确认 zX@987Weqqrd1
The 'validate_password' plugin is installed on the server.
The subsequent steps will run with the existing configuration
of the plugin.
Using existing password for root.
Estimated strength of the password: 100
Change the password for root ? ((Press y|Y for Yes, any other key for No) : y 修改密码确认
New password: 再次输入 zX@987Weqqrd1
Re-enter new password: 再次输入 zX@987Weqqrd1