post_install(){
  groupadd -g 89 mysql &>/dev/null
  useradd -u 89 -g mysql -d "/var/lib/mysql" -s /bin/false mysql &>/dev/null

  if [[ ! -e "/var/lib/mysql" ]]; then
    install -dm700 "/var/lib/mysql"
    chown -R mysql:mysql "/var/lib/mysql" &>/dev/null
  fi

  echo ":: You need to initialize the MySQL data directory prior to starting"
  echo "   the service. This can be done with mysql_install_db command, e.g.:"
  echo "   mysql_install_db --user=mysql --basedir=/usr --datadir=/var/lib/mysql"
  echo ":: Additionally you should secure your MySQL installation using"
  echo "   mysql_secure_installation command after starting the mysqld service"
}

post_remove(){
  if getent passwd mysql >/dev/null 2>&1; then
    userdel mysql
  fi
  if getent group mysql >/dev/null 2>&1; then
    groupdel mysql
  fi
}