From https://mariadb.com/portal_file/60898
sudo apt-get install software-properties-common sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 8167EE24 sudo add-apt-repository 'deb [arch=amd64] http://downloads.mariadb.com/software/MaxScale/maxscale-1.0.4/DEB trusty main'