yum -y install epel-release
yum clean all
yum makecache
yum -y update

yum install -y lrzsz ntpdate sysstat  wget vim net-tools

wget http://dev.mysql.com/get/mysql57-community-release-el7-9.noarch.rpm

sudo yum -y localinstall mysql57-community-release-el7-9.noarch.rpm 
sudo yum -y install mysql-community-server 
sudo systemctl restart mysqld
sudo grep ‘temporary password‘ /var/log/mysqld.log

sudo systemctl stop mysqld
sudo mkdir -p /home/mydata/mysql
sudo chown mysql:mysql -R /home/mydata/mysql
sudo mv /var/lib/mysql/* /home/mydata/mysql
sudo ln -s /home/mydata/mysql/mysql.sock /var/lib/mysql/mysql.sock

sudo vim /etc/my.cnf
#调整配置如下
datadir=/home/mydata/mysql/
socket=/home/mydata/mysql/mysql.sock

sudo systemctl restart mysqld