Percona Server for MySQL In-Place Upgrading Guide: From 5.7 to 8.0¶
An in-place upgrade is performed by using existing data on the server and involves the following actions:
Stopping the MySQL 5.7 server
Replacing the old binaries with MySQL 8.0 binaries
Starting the MySQL 8.0 server with the same data files.
While an in-place upgrade may not be suitable for all environments, especially those environments with many variables to consider, the upgrade should work in most cases.
The following list summarizes a number of the changes in the 8.0 series and has useful guides that can help you perform a smooth upgrade. We strongly recommend reading this information:
Review other Percona blogs that contain upgrade information.
Implemented in release Percona Server for MySQL 8.0.15-5, Percona Server for MySQL uses the upstream implementation of binary log file encryption and relay log file encryption.
The encrypt-binlog variable is removed, and the related command-line option –encrypt-binlog is not supported. It is important to remove the encrypt-binlog variable from your configuration file before you attempt to upgrade either from another release in the Percona Server for MySQL 8.0 series or from Percona Server for MySQL 5.7. Otherwise, a server boot error is generated and reports an unknown variable.
The implemented binary log file encryption is compatible with the older format. The encrypted binary log file used in a previous version of MySQL 8.0 series or Percona Server for MySQL series is supported.
Before you start the upgrade process, it is recommended to make a full backup of your database.
Copy the database configuration file, for example,
my.cnf, to another directory to save it.
Do not upgrade from 5.7 to 8.0 on a crashed instance. If the server instance has crashed, run the crash recovery before proceeding with the upgrade.
You can select one of the following ways to upgrade Percona Server for MySQL from 5.7 to 8.0:
Upgrading using the Percona repositories
Upgrading from Systems that Use the MyRocks or TokuDB Storage Engine and Partitioned Tables
Upgrading using Standalone Packages