Streamline configure-mirrors and Ubuntu repository setup

- Improve the structure to support multiple distributions
- Use one task to set up the different repository files
- Use handler to update the apt cache

Change-Id: I90933164cbca9d230cebeb3e2e1263c7806db840

roles/configure-mirrors/defaults/main.yaml

@@ -1 +1,2 @@
 pypi_mirror: "http://{{ mirror_fqdn }}/pypi/simple"
+wheel_mirror: "http://{{ mirror_fqdn }}/wheel/{{ ansible_distribution | lower }}-{{ ansible_distribution_version }}-{{ ansible_architecture | lower }}"

roles/configure-mirrors/files/etc/apt/apt.conf.d/99unauthenticated

@@ -1,4 +0,0 @@
-# This file is generated by Ansible
-#  DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
-#
-APT::Get::AllowUnauthenticated "true";

roles/configure-mirrors/handlers/main.yaml

@@ -0,0 +1,5 @@
+# The apt module can not be used for this since it installs python-apt
+# which can not work until this command fixes the cache.
+- name: Update apt cache
+  become: yes
+  command: apt-get update

roles/configure-mirrors/tasks/main.yaml

@@ -1,2 +1,4 @@
-- include: mirror.yaml
+- name: Set up infrastructure mirrors
+  include: mirror.yaml
   when: mirror_fqdn is defined
+  static: no

roles/configure-mirrors/tasks/mirror.yaml

@@ -1,6 +1,3 @@
-- name: Include OS-specific variables
-  include_vars: "{{ ansible_distribution | lower }}.yaml"
-
 - name: Install /etc/pip.conf configuration
   become: yes
   template:
@@ -16,11 +13,17 @@
     mode: 0644
     src: .pydistutils.cfg.j2
 
-- name: Setup distro specific packaging mirrors.
-  include: "packages/{{ ansible_distribution | lower }}.yaml"
+- name: Include OS-specific variables
+  include_vars: "{{ item }}"
+  with_first_found:
+    - "{{ ansible_distribution }}.yaml"
+    - "{{ ansible_os_family }}.yaml"
+    - "default.yaml"
 
-# Make sure OS does not have a stale package cache.
-- name: Update apt cache
-  become: yes
-  command: apt-get update
-  when: ansible_os_family == 'Debian'
+- name: Setup distribution specific packaging mirrors
+  include: "{{ item }}"
+  static: no
+  with_first_found:
+    - "mirror/{{ ansible_distribution }}.yaml"
+    - "mirror/{{ ansible_os_family }}.yaml"
+    - "mirror/default.yaml"

roles/configure-mirrors/tasks/mirror/Ubuntu.yaml

@@ -0,0 +1,13 @@
+- name: Install Ubuntu repository files
+  become: yes
+  template:
+    dest: "/{{ item }}"
+    group: root
+    mode: 0644
+    owner: root
+    src: "{{ item }}.j2"
+  with_items:
+    - etc/apt/sources.list
+    - etc/apt/apt.conf.d/99unauthenticated
+  notify:
+    - Update apt cache

roles/configure-mirrors/tasks/mirror/default.yaml

@@ -0,0 +1,6 @@
+- name: Warn about unsupported distribution
+  debug:
+    msg: >
+      WARNING: {{ ansible_distribution }} mirrors are not supported either
+      by this role yet. The execution of the job will continue without setting
+      up cached mirrors.

roles/configure-mirrors/tasks/packages/ubuntu.yaml

@@ -1,17 +0,0 @@
-- name: Install /etc/apt/sources.list
-  become: yes
-  template:
-    dest: /etc/apt/sources.list
-    group: root
-    mode: 0644
-    owner: root
-    src: etc/apt/sources.list.j2
-
-- name: Install /etc/apt/apt.conf.d/99unauthenticated
-  become: yes
-  copy:
-    dest: /etc/apt/apt.conf.d/99unauthenticated
-    group: root
-    mode: 0644
-    owner: root
-    src: etc/apt/apt.conf.d/99unauthenticated

roles/configure-mirrors/templates/etc/apt/apt.conf.d/99unauthenticated.j2

@@ -0,0 +1,2 @@
+# {{ ansible_managed }}
+APT::Get::AllowUnauthenticated "true";

roles/configure-mirrors/vars/Ubuntu.yaml

@@ -0,0 +1 @@
+package_mirror: "http://{{ mirror_fqdn }}/{{ ansible_distribution | lower }}"

roles/configure-mirrors/vars/default.yaml

@@ -0,0 +1 @@
+package_mirror:

roles/configure-mirrors/vars/ubuntu.yaml

@@ -1,2 +0,0 @@
-wheel_mirror: "http://{{ mirror_fqdn }}/wheel/{{ ansible_distribution | lower }}-{{ ansible_distribution_version }}-{{ ansible_architecture | lower }}"
-package_mirror: "http://{{ mirror_fqdn }}/ubuntu"