mariadb
cluster
Three Ubuntu 16.04 servers
install on each node
apt-key adv --recv-keys --keyserver hkp://keyserver.ubuntu.com:80 0xF1656F24C74CD1D8 add-apt-repository 'deb [arch=amd64] http://nyc2.mirrors.digitalocean.com/mariadb/repo/10.1/ubuntu xenial main' apt update apt install mariadb-server rsync