## install mysql 5.7
yum update
yum install yum-utils -y
yum localinstall https://repo.mysql.com//mysql80-community-release-el7-3.noarch.rpm -y
yum-config-manager --disable mysql80-community
yum-config-manager --enable mysql57-community
yum install mysql-community-server -y
# edit /etc/my.cnf
# 1. change socket=/tmp/mysql.sock under [mysqld] section
# add [client] section if not exist
# 2. change or add socket=/tmp/mysql.sock under [client] section
# install selinux utils
yum install policycoreutils-python-2.5-34.el7.x86_64
# start mysql service to get fail audit log for next step
systemctl start mysqld.service # this will not work and report error at this time
# modify selinux by analyzing audit log automatically
ausearch -c 'mysqld' --raw | audit2allow -m my-mysqld
semodule -i my-mysqld.pp
# start mysql service
systemctl start mysqld.service # service should start up accordingly
# get mysql temporary password in /var/log/mysqld.log
grep 'temporary password' /var/log/mysqld.log
# test mysql client connection
mysql -p
# change mysql root password and secure installation
mysql_secure_installation
