defaults: refact package dependencies installation.

Because 5c98e361df could be seen as a non
backward compatible change this commit reverts it and bring back package
dependencies installation support.
Let's just modify the default value instead.

Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>
(cherry picked from commit edfa4310d3)

group_vars/all.yml.sample

@@ -76,10 +76,14 @@ dummy:
 ############
 # PACKAGES #
 ############
+#debian_package_dependencies: []
+
 #centos_package_dependencies:
 #  - epel-release
 #  - libselinux-python
 
+#redhat_package_dependencies: []
+
 #suse_package_dependencies:
 #  - python-xml
 

group_vars/rhcs.yml.sample

@@ -76,10 +76,14 @@ fetch_directory: ~/ceph-ansible-keys
 ############
 # PACKAGES #
 ############
+#debian_package_dependencies: []
+
 #centos_package_dependencies:
 #  - epel-release
 #  - libselinux-python
 
+#redhat_package_dependencies: []
+
 #suse_package_dependencies:
 #  - python-xml
 

roles/ceph-common/tasks/installs/install_on_debian.yml

@@ -11,6 +11,15 @@
   register: result
   until: result is succeeded
 
+- name: install dependencies
+  apt:
+    name: "{{ debian_package_dependencies }}"
+    state: present
+    update_cache: yes
+    cache_valid_time: 3600
+  register: result
+  until: result is succeeded
+
 - name: include install_debian_packages.yml
   include_tasks: install_debian_packages.yml
   when:

roles/ceph-common/tasks/installs/install_redhat_packages.yml

@@ -1,4 +1,13 @@
 ---
+- name: install redhat dependencies
+  package:
+    name: "{{ redhat_package_dependencies }}"
+    state: present
+  register: result
+  until: result is succeeded
+  when:
+    - ansible_distribution == 'RedHat'
+
 - name: install centos dependencies
   yum:
     name: "{{ centos_package_dependencies }}"

roles/ceph-defaults/defaults/main.yml

@@ -68,10 +68,14 @@ ceph_conf_local: false
 ############
 # PACKAGES #
 ############
+debian_package_dependencies: []
+
 centos_package_dependencies:
   - epel-release
   - libselinux-python
 
+redhat_package_dependencies: []
+
 suse_package_dependencies:
   - python-xml