Tweaks to make install run idempotent

roles/neutron-controller/tasks/main.yml

@@ -1,8 +1,11 @@
 # Build and install a docker image for neutron-controller.
 ---
+- set_fact:
+    docker_image: "webhost12.service.rug.nl/hpc/openstack-neutron-controller:latest"
+
 - name: pull docker image
   docker_image:
-  name: webhost12.service.rug.nl/hpc/openstack-neutron-controller:latest
+    name: "{{ docker_image }}"
   tags: pull
 
 - set_fact:
@@ -18,10 +21,10 @@
         -e "NOVA_PASSWORD=geheim"
         -e "NOVA_USER=nova"
         -e "MEMCACHED_HOST={{ hostvars[groups['memcached'][0]]['ansible_default_ipv4']['address'] }}"
-        -e "OVERLAY_INTERFACE_IP_ADDRESS={{ hostvars[groups['neutron-controller'][0]]['ansible_default_ipv4']['address'] }}"
         -e "PROVIDER_INTERFACE_NAME={{ hostvars[groups['neutron-controller'][0]]['ansible_default_ipv4']['interface'] }}"
         -e "RABBIT_PASSWORD=geheim"
         -e "RABBIT_USER=openstack"
+  tags: env
 
 - name: install service file.
   template:
@@ -40,7 +43,7 @@
     --add-host=mariadb:{{ hostvars[groups['databases'][0]]['ansible_default_ipv4']['address'] }}
     --add-host=keystone:{{ hostvars[groups['keystone'][0]]['ansible_default_ipv4']['address'] }}
     --network host
-    hpc/openstack-neutron-controller
+    {{ docker_image }}
     /etc/bootstrap.sh
   tags: bootstrap