Downgrade MySQL 8.0.20 to 8.0.19 on Ubuntu for using XtraBackup

Question

With MySQL 8.0.20 currently installed on Ubuntu, I am unable to use Percona XtraBackup 2.3.7 due to breaking changes introduced in MySQL 8.0.20.

How can we downgrade MySQL 8.0.20 to 8.0.19 on Ubuntu, which I believe is the latest MySQL version currently supported by XtraBackup? dpkg-reconfigure mysql-apt-config does not allow us to select a minor version.

Must the current data be backup using mysqldump before the downgrade, and restored using the dump after the downgrade?

Answer 1

Xtrabackup 8.0.12 should work with MySQL 8.0.20

Percona xtrabackup 8.0.12 release

Percona XtraBackup 8.0.12 now supports backup and restore processing for all versions of MySQL up to and including 8.0.20; previous versions of Percona XtraBackup will not work with MySQL 8.0.20 and higher.