Install MySQL 8 on CentOS 7

mysql8_centos7.txt

yum -y update
yum -y install yum-utils bc


# start from a clean install
# centos 7 may have some mariadb libs which cause clashes
yum remove -y maria*
yum clean

# install mysql
YUM_REPO_URL="https://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm "
yum -y install epel-release  && \
        rpm -ivh ${YUM_REPO_URL} && \
        yum-config-manager --disable mysql55-community && \
        yum-config-manager --disable mysql56-community && \
        yum-config-manager --disable mysql57-community && \
        yum-config-manager --enable mysql80-community && \
        yum clean all

yum -y update && yum -y install \
        mysql-community-server
        
# enable mysql on startup
systemctl enable mysqld

# start mysql
echo "starting MySQL..."
systemctl start mysqld

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

# run mysql_secure_installation --> follow the prompts
#        remove anonymouse users
#        disallow root remote login


# open the mysql port in the firewall - replace 10.0.0.1/8 with a more restrictive subnet
firewall-cmd --add-rich-rule 'rule family="ipv4" source address="10.0.0.1/8" service name="mysql" accept' --permanent
firewall-cmd --reload


# for performance lower the swappiness
echo 3 /proc/sys/vm/swappiness
sysctl vm.swappiness=3