Install required packages for NFS/CephFS mounts

Currently it's deployer resposibility to install required binaries for
mounts to succeed, which is not really convenient. Instead of this
we can try to provide at least some basic binaries installation in case
supported type is set.

Depends-On: https://review.opendev.org/755484
Change-Id: I680359ca655d0f69a40e9d29dbf1694cd0aa4ca2

tasks/main.yml

@@ -13,5 +13,22 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+- name: Gather variables for each operating system
+  include_vars: "{{ item }}"
+  with_first_found:
+    - "{{ ansible_distribution | lower }}-{{ ansible_distribution_version | lower }}.yml"
+    - "{{ ansible_distribution | lower }}-{{ ansible_distribution_major_version | lower }}.yml"
+    - "{{ ansible_os_family | lower }}-{{ ansible_distribution_major_version | lower }}.yml"
+    - "{{ ansible_distribution | lower }}.yml"
+    - "{{ ansible_os_family | lower }}-{{ ansible_distribution_version.split('.')[0] }}.yml"
+    - "{{ ansible_os_family | lower }}.yml"
+  tags:
+    - always
+
+- name: Install required distro packages for mounts
+  package:
+    name: "{{ systemd_mount_packages }}"
+    state: present
+
 - include_tasks: systemd_mounts.yml
   with_items: "{{ systemd_mounts }}"

vars/debian.yml

@@ -0,0 +1,5 @@
+systemd_nfs_packages:
+  - nfs-common
+
+systemd_ceph_packages:
+  - ceph-fuse

vars/main.yml

@@ -19,3 +19,14 @@ systemd_mount_states:
   started: reload-or-restart
   stopped: stopped
   absent: stopped
+
+systemd_mount_packages: |-
+  {% set packages = [] %}
+  {% set mount_types = systemd_mounts | map(attribute='type') | list %}
+  {% if 'nfs' in mount_types %}
+  {%   set _ = packages.extend(systemd_nfs_packages) %}
+  {% endif %}
+  {% if 'ceph' in mount_types %}
+  {%   set _ = packages.extend(systemd_ceph_packages) %}
+  {% endif %}
+  {{ packages }}

vars/redhat.yml

@@ -0,0 +1,5 @@
+systemd_nfs_packages:
+  - nfs-utils
+
+systemd_ceph_packages:
+  - ceph-fuse