Make systemd unit file install

.. without running other tasks

cinder-controller.yml

@@ -2,6 +2,8 @@
 - hosts: all
   name: Dummy to gather facts
   tasks: []
+  tags:
+     - facts
 
 - hosts: cinder-controller
   become: True

roles/cinder-controller/tasks/main.yml

@@ -4,6 +4,8 @@
   include_vars:
     file: ../../secrets.yml
     name: secrets
+  tags:
+    - facts
 
 - set_fact:
     docker_image: registry.webhosting.rug.nl/hpc/openstack-cinder-controller:latest
@@ -21,6 +23,8 @@
         -e "RABBIT_PASSWORD={{ secrets['RABBIT_PASSWORD'] }}"
         -e "RABBIT_USER=openstack"
         -e "RBD_SECRET_UUID={{ secrets['CINDER_RBD_SECRET_UUID']}}"
+  tags:
+    - facts
 
 - name: pull docker image
   docker_image:
@@ -43,11 +47,17 @@
     mode: 644
     owner: root
     group: root
+  tags:
+    - systemd
 
 - name: start service at boot.
   command: systemctl reenable cinder-controller.service
+  tags:
+    - systemd
 
 - command: systemctl daemon-reload
+  tags:
+    - systemd
 
 - name: Initialize database.
   command: >