How to install mysql 8 in Centos 7

Install mysql yum repo

# yum install -y https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm

Install mysql-community-server

# yum install -y mysql-community-server

Start mysql server

# systemctl start mysqld

Get the default mysql root password from mysqld.log

# grep 'temporary password' /var/log/mysqld.log

Login to the mysql console, and change the root password

# mysql -u root -p

mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewP@ssword!123';

mysql> exit

If you are using centos internal firewall, allow access to mysql port

# firewall-cmd --add-service mysql

# firewall-cmd --add-service mysql --permanent

Reference: https://dev.mysql.com/doc/mysql-yum-repo-quick-guide/en/