I tested quickly running upgrade on a Trusty machine with ppa:mysql-ubuntu/mariadb enabled and everything went fine. This is the most critical use case. I have unfortunately not time nor an automatic system to more extensive testing for now.
$ sudo add-apt-repository ppa:mysql-ubuntu/mariadb
$ apt-get update
$ apt-get upgrade
$ service mysql status
* /usr/bin/mysqladmin Ver 9.0 Distrib 5.5.44-MariaDB, for debian-linux-gnu on x86_64
Copyright (c) 2000, 2015, Oracle, MariaDB Corporation Ab and others.
Server version 5.5.44-MariaDB-1ubuntu0.14.04.2~trusty1~1434224940
Protocol version 10
Connection Localhost via UNIX socket
UNIX socket /var/run/mysqld/mysqld.sock
Uptime: 55 sec
I tested quickly running upgrade on a Trusty machine with ppa:mysql- ubuntu/ mariadb enabled and everything went fine. This is the most critical use case. I have unfortunately not time nor an automatic system to more extensive testing for now.
$ sudo add-apt-repository ppa:mysql- ubuntu/ mariadb
$ apt-get update
$ apt-get upgrade
$ service mysql status
* /usr/bin/mysqladmin Ver 9.0 Distrib 5.5.44-MariaDB, for debian-linux-gnu on x86_64
Copyright (c) 2000, 2015, Oracle, MariaDB Corporation Ab and others.
Server version 5.5.44- MariaDB- 1ubuntu0. 14.04.2~ trusty1~ 1434224940 mysqld/ mysqld. sock
Protocol version 10
Connection Localhost via UNIX socket
UNIX socket /var/run/
Uptime: 55 sec