Move UCA repo URL var to role defaults

In order to expose the var in role documentation and to allow the use
of dynamically set facts to override the value in CI environments the
variables are moved from the role vars to the role defaults.

The test preparation implements an override of the URL for OpenStack-CI
to make use of the local mirrors.

The variable to enable/disable the use of UCA has been standardised
to the same as the os_nova role.

Change-Id: I442f6dca8345f78848536f2fc923b72be8a6d092

defaults/main.yml

@@ -38,8 +38,6 @@ neutron_developer_constraints:
   - "git+{{ neutron_lbaas_git_repo }}@{{ neutron_lbaas_git_install_branch }}#egg=neutron-lbaas"
   - "git+{{ neutron_vpnaas_git_repo }}@{{ neutron_vpnaas_git_install_branch }}#egg=neutron-vpnaas"
 
-neutron_use_uca: True
-
 # Name of the virtual env to deploy into
 neutron_venv_tag: untagged
 neutron_bin: "/openstack/venvs/neutron-{{ neutron_venv_tag }}/bin"
@@ -384,6 +382,11 @@ neutron_service_in_ldap: false
 # neutron_local_ip is used for the VXLAN local tunnel endpoint
 neutron_local_ip: 127.0.0.1
 
+# Toggle the use of Ubuntu Cloud Archive
+neutron_uca_enable: True
+# Ubuntu Cloud Archive mirror URL
+uca_apt_repo_url: "http://ubuntu-cloud.archive.canonical.com/ubuntu"
+
 # When running in an AIO, we need to implement an iptables rule in any
 # neutron_agent containers to that ensure instances can communicate with
 # the neutron metadata service. This is necessary because in an AIO

releasenotes/notes/use-uca-by-default-070751b0b388fcbe.yaml

@@ -1,6 +1,4 @@
 ---
-other:
-  - Neutron now makes use of ubuntu cloud archive by
-    default. This can be disabled by setting
-    ``neutron_use_uca`` to ``False`` in your user
-    variables.
+upgrade:
+  - Neutron now makes use of Ubuntu Cloud Archive by default. This can be
+    disabled by setting ``neutron_uca_enable`` to ``False``.

tasks/neutron_install-apt.yml

@@ -18,14 +18,14 @@
     pkg: ubuntu-cloud-keyring
     state: latest
   register: add_uca_keys
-  when: neutron_use_uca | bool
+  when: neutron_uca_enable | bool
 
 - name: Add Ubuntu Cloud Archive Repository
   apt_repository:
     repo: "{{ uca_repo }}"
     state: present
   register: add_uca_repo
-  when: neutron_use_uca | bool
+  when: neutron_uca_enable | bool
 
 #TODO(evrardjp): Replace the next 2 tasks by a standard apt with cache
 #when https://github.com/ansible/ansible-modules-core/pull/1517 is merged

tests/test-install-neutron.yml

@@ -91,6 +91,21 @@
       when: inventory_hostname == groups['neutron_all'][0]
       tags:
         - mysql-db-setup
+    - name: Check if this is an OpenStack-CI nodepool instance
+      stat:
+        path: /etc/nodepool/provider
+      register: nodepool
+      delegate_to: localhost
+    - name: Determine the existing Ubuntu repo URL (only on OpenStack-CI)
+      shell: 'awk "/^deb .*ubuntu\/? {{ ansible_distribution_release }} main/ {print \$2; exit}" /etc/apt/sources.list'
+      register: ubuntu_repo_url
+      changed_when: false
+      when: nodepool.stat.exists | bool
+      delegate_to: localhost
+    - name: Set Ubuntu Cloud Archive repo URL based on discovered information
+      set_fact:
+        uca_apt_repo_url: "{{ ubuntu_repo_url.stdout | netorigin }}/ubuntu-cloud-archive"
+      when: nodepool.stat.exists | bool
   roles:
     - role: "{{ rolename | basename }}"
   post_tasks:

vars/ubuntu-14.04.yml

@@ -13,10 +13,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# Ubuntu Cloud Archive variables
 # There are no UCA packages for Trusty beyond Mitaka, so the selected
 # release here has to remain at Mitaka.
 uca_openstack_release: mitaka
-uca_apt_repo_url: "http://ubuntu-cloud.archive.canonical.com/ubuntu"
 uca_repo_dist: "{{ ansible_lsb.codename }}-updates/{{ uca_openstack_release }}"
 uca_repo: "deb {{ uca_apt_repo_url }} {{ uca_repo_dist }} main"
 

vars/ubuntu-16.04.yml

@@ -13,8 +13,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# Ubuntu Cloud Archive variables
 uca_openstack_release: newton
-uca_apt_repo_url: "http://ubuntu-cloud.archive.canonical.com/ubuntu"
 uca_repo_dist: "{{ ansible_lsb.codename }}-updates/{{ uca_openstack_release }}"
 uca_repo: "deb {{ uca_apt_repo_url }} {{ uca_repo_dist }} main"