Rearanged the playbook to use ansible roles:

http://docs.ansible.com/ansible/playbooks_roles.html

also made keystone run

roles/mariadb/files/mysql.service

@@ -0,0 +1,16 @@
+[Unit]
+Description=Mariadb Container
+After=docker.service
+Requires=docker.service
+ 
+[Service]
+TimeoutStartSec=0
+Restart=always
+ExecStartPre=-/usr/bin/docker stop %n
+ExecStartPre=-/usr/bin/docker rm %n
+ExecStartPre=/usr/bin/docker pull mariadb:10.1.22
+ExecStart=/usr/bin/docker run  -p 3306:3306 --name %n -v /srv/lib/mysql:/var/lib/mysql \
+ -e MYSQL_ROOT_PASSWORD=geheim mariadb:10.1.22
+ 
+[Install]
+WantedBy=multi-user.target