image_template: allow to setup template version name

Allow to create templates with the same name but with
different version by setting up the `template_version_name`
variable. Creating a new version requires the base template
to exist. If not specified the value of the variable is
`base version` which is the default value for base templates.

Signed-off-by: Miguel Martín <mmartinv@redhat.com>

roles/image_template/README.md

@@ -49,6 +49,7 @@ Role Variables
 | glance_image_provider        | UNDEF (mandatory if qcow_url is not used)            | Name of the glance image provider.                    |
 | glance_image            | UNDEF (mandatory if qcow_url is not used)               | This parameter specifies the name of disk in glance provider to be imported as template. |
 | template_prerequisites_tasks | UNDEF | Works only with qcow image. Specify a path to Ansible tasks file, which should be executed on virtual machine before creating a template from it. Note that qcow image must contain guest agent which reports IP address. |
+| template_version_name      | "base version" | Version name of the template. Allows to create different versions of a template.  |
 
 The `template_disks` List of dictionaries can contain following attributes:
 

roles/image_template/defaults/main.yml

@@ -16,6 +16,7 @@ template_nics:
     profile_name: ovirtmgmt
     interface: virtio
 template_seal: true
+template_version_name: '\"base version\"'
 
 disk_resize_timeout: 60
 disk_storage_domain: null

roles/image_template/tasks/qcow2_image.yml

@@ -83,7 +83,8 @@
     - name: Check if template already exists
       ovirt_template_info:
         auth: "{{ ovirt_auth }}"
-        pattern: "name={{ template_name }} and datacenter={{ dc_info.ovirt_datacenters[0].name }}"
+        pattern: "name={{ template_name }} and datacenter={{ dc_info.ovirt_datacenters[0].name }}
+          and version_name={{ template_version_name }}"
       register: template_info
       tags:
         - ovirt-template-image
@@ -230,6 +231,10 @@
         cluster: "{{ template_cluster }}"
         timeout: "{{ template_timeout }}"
         seal: "{{ template_seal }}"
+        version:
+          name: "{{ template_version_name }}"
+        description: "{{ template_description | default(omit)}}"
+        operating_system: "{{ template_operating_system | default(omit)}}"
       when: template_info.ovirt_templates | length == 0
       tags:
         - ovirt-template-image