haproxy: use APT preferences to install haproxy from backports

haproxy-backports-preferences/README.md

@@ -0,0 +1,5 @@
+# haproxy-backports-preferences
+
+Configure APT to prefer haproxy package from jessie-backports.
+
+There is no variable, just a files copied to `/etc/apt/preferences.d/`.

haproxy-backports-preferences/files/haproxy_preferences

@@ -0,0 +1,3 @@
+Package: haproxy
+Pin: release a=jessie-backports
+Pin-Priority: 999

haproxy-backports-preferences/handlers/main.yml

@@ -0,0 +1,4 @@
+---
+- name: apt update
+  apt:
+    update_cache: yes

haproxy-backports-preferences/meta/main.yml

@@ -0,0 +1,19 @@
+galaxy_info:
+  author: Evolix
+  description: Configure APT to prefer haproxy package from jessie-backports
+
+  issue_tracker_url: https://forge.evolix.org/projects/ansible-roles/issues
+
+  license: GPLv2
+
+  min_ansible_version: 2.2
+
+  platforms:
+  - name: Debian
+    versions:
+    - jessie
+
+dependencies: []
+  # List your role dependencies here, one per line.
+  # Be sure to remove the '[]' above if you add dependencies
+  # to this list.

haproxy-backports-preferences/tasks/main.yml

@@ -0,0 +1,10 @@
+---
+- name: Prefer HAProxy package from jessie-backports
+  copy:
+    src: haproxy_preferences
+    dest: /etc/apt/preferences.d/999-haproxy
+    force: yes
+    mode: "0640"
+  notify: apt update
+
+- meta: flush_handlers

haproxy/README.md

@@ -8,10 +8,7 @@ Everything is in the `tasks/main.yml` file.
 
 ## Available variables
 
-* `general_package_release`: which Debian release to use generally (default: `stable`).
-* `haproxy_package_release`: which Debian release to use for HAProxy (default: `general_package_release`).
-
-The full list of variables (with default values) can be found in `defaults/main.yml`.
+There is no variable.
 
 ## Configuration templates
 

haproxy/defaults/main.yml

@@ -1,2 +0,0 @@
----
-general_package_release: stable

haproxy/tasks/main.yml

@@ -8,9 +8,7 @@
 - name: Install HAProxy package
   apt:
     name: haproxy
-    default_release: "{{ haproxy_package_release or general_package_release | mandatory }}"
-    update_cache: True
-    state: present
+    state: installed
 
 - name: Copy HAProxy configuration
   template: