CentOS 6.9 yum安装MySQL 5.7

本篇笔记记录了在CentOS 6.9中使用yum安装MySQL 5.7的过程

官网下载yum资源库rpm

wget -c https://dev.mysql.com/get/mysql80-community-release-el6-2.noarch.rpm

安装yum资源库

rpm -Uvh mysql80-community-release-el6-2.noarch.rpm

修改库配置

vim /etc/yum.repos.d/mysql-community.repo

启用MySQL 5.7 Community Server，禁用MySQL 8.0 Community Server

[mysql57-community]
name=MySQL 5.7 Community Server
baseurl=http://repo.mysql.com/yum/mysql-5.7-community/el/6/$basearch/
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

[mysql80-community]
name=MySQL 8.0 Community Server
baseurl=http://repo.mysql.com/yum/mysql-8.0-community/el/6/$basearch/
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

安装mysql

yum install mysql-community-server

启动并初始化mysql

service mysqld start
初始化 MySQL 数据库：                                      [确定]
正在启动 mysqld：                                          [确定]

查看root默认密码

grep 'temporary password' /var/log/mysqld.log
2019-03-03T17:22:33.353738Z 1 [Note] A temporary password is generated for root@localhost: 1QPe_VwJNj6z

1QPe_VwJNj6z便是要找的密码
登录mysql

mysql -uroot -p
......
mysql> show databases;
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.

报错：ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.提示要先修改默认密码

#测试环境的话密码不需要那么复杂，可以降低级别
set global validate_password_policy=0;
set global validate_password_length=1;
#修改密码
alter user 'root'@'localhost' identified by 'vagrant'

ok，安装完毕！
提示：
如果在执行service mysqld restart或service mysqld stop时无响应，请查看logtail -f /var/log/mysqld.log
如果一直提示如下信息
InnoDB: Waiting for page_cleaner to finish flushing of buffer pool
说明服务器时区有问题，可以修改时区或ps aux | grep mysqld查看进程ID，然后kill -9 进程ID将其杀掉就ok了