MaxScale/Documentation/Upgrading/Upgrading-To-MaxScale-2.4.md

Upgrading MariaDB MaxScale from 2.3 to 2.4

This document describes possible issues when upgrading MariaDB MaxScale from version 2.3 to 2.4.

For more information about MariaDB MaxScale 2.4, please refer to the ChangeLog.

Before starting the upgrade, we recommend you back up your current configuration file.

Section Names

Section and object names starting with @@ are now reserved for internal use by MaxScale.

In case such names have been used, they must manually be changed in all configuration files of MaxScale, before MaxScale 2.4 is started.

Those files are:

• The main configuration file; typically /etc/maxscale.cnf.
• All nested configuration files; typically /etc/maxscale.cnf.d/*.
• All dynamic configuration files; typically /var/lib/maxscale/maxscale.cnd.d/*.

Further, whitespace in section names that was deprecated in MaxScale 2.2 will now be rejected, which will cause the startup of MaxScale to fail.

To prevent that, section names like

[My Server]
...

[My Service]
...
servers=My Server

must be changed, for instance, to

[MyServer]
...

[MyService]
...
servers=MyServer

Durations

Durations can now be specified using one of the suffixes h, m, s and ms for specifying durations in hours, minutes, seconds and milliseconds, respectively.

Not providing an explicit unit has been deprecated in MaxScale 2.4, so it is adviseable to add suffixes to durations. For instance,

some_param=60s
some_param=60000ms