centos如何升级mysql

mysqldump -u root -p --all-databases > /path/to/backup.sql

sudo systemctl stop mysqld

sudo yum remove mysql-server mysql

sudo dnf remove mysql-server mysql

[mysql57-community]
name=MySQL 5.7 Community Server
baseurl=http://repo.mysql.com/yum/mysql-5.7-community/el/7/$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/7/$basearch/
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

sudo yum install mysql-community-server

sudo dnf install mysql-community-server

sudo systemctl start mysqld
sudo systemctl status mysqld

mysql --version

sudo mysql_secure_installation

mysql -u root -p < /path/to/backup.sql

sudo yum remove mysql-server mysql
sudo yum clean all
sudo yum install mysql-community-server

sudo chown -R mysql:mysql /var/lib/mysql
sudo systemctl start mysqld