Remove needless variable re-declaration

Those variables are already defined in our group_vars, let's re-use
them.

Change-Id: I94065c1442dc061ff621e5ce0d861bbcc2e269c8

roles/host-preparation/defaults/main.yml

@@ -14,10 +14,6 @@
 #   under the License.
 #
 
-host_preparation_domain: registry.rdoproject.org
-host_preparation_registry: trunk.registry.rdoproject.org
-host_preparation_console: console.registry.rdoproject.org
-
 host_preparation_packages:
   - wget
   - git
@@ -29,10 +25,6 @@ host_preparation_packages:
   - docker
   - pyOpenSSL
 
-# OpenStack (TripleO) clouds have a default MTU of 1450, we need to override
-# the 1500 default
-host_preparation_docker_mtu: 1400
-
 # It is expected that the host has an additional cinder volume/disk for the
 # storage of containers and images.
 # host_preparation_docker_disk: "/dev/vdb"

roles/host-preparation/tasks/main.yml

@@ -25,16 +25,16 @@
     line: "127.0.0.1 {{ item }}"
     insertafter: EOF
   with_items:
-    - "{{ host_preparation_domain }}"
-    - "{{ host_preparation_registry }}"
-    - "{{ host_preparation_console }}"
+    - "{{ openshift_master_cluster_public_hostname }}"
+    - "{{ openshift_hosted_registry_routehost }}"
+    - "{{ openshift_hosted_registry_console_routehost }}"
     - "{{ ansible_fqdn }}"
 
 - name: Configure Docker insecure registry for internal OpenShift subnet
   lineinfile:
     dest: "/etc/sysconfig/docker"
     regexp: "^INSECURE_REGISTRY="
-    line: "INSECURE_REGISTRY='--insecure-registry 172.30.0.0/16'"
+    line: "INSECURE_REGISTRY='--insecure-registry {{ openshift_docker_insecure_registries }}'"
   notify:
     - Restart docker
 
@@ -50,7 +50,7 @@
   lineinfile:
     dest: "/etc/sysconfig/docker-network"
     regexp: "^DOCKER_NETWORK_OPTIONS="
-    line: "DOCKER_NETWORK_OPTIONS='--mtu {{ host_preparation_docker_mtu }}'"
+    line: "DOCKER_NETWORK_OPTIONS='--mtu {{ openshift_node_sdn_mtu }}'"
   notify:
     - Restart docker