Add support of image format conversion on importing

Optinally enable conversion of images to raw format when uploading
images to Glance. Only supported when "image_conversion" is enabled in
Glance.

This is an equivalent change to the one in simplestreams:
https://git.launchpad.net/simplestreams/commit/?id=cbc0ac9

Closes-Bug: #1889729
Change-Id: Id15fab364c27242347c520b959065c490e4da6b6

config.yaml

@@ -138,3 +138,9 @@ options:
       OpenStack mostly defaults to using public endpoints for internal
       communication between services. If set to True this option will
       configure services to use internal endpoints where possible.
+  image_import_conversion:
+    type: boolean
+    default: False
+    description: |
+      Enable conversion of images to raw format when uploading images to Glance.
+      Only supported when "image_conversion" is enabled in Glance.

files/glance_simplestreams_sync.py

@@ -299,6 +299,10 @@ def do_sync(ksc, charm_conf):
                         '--custom-property',
                         custom_property
                     ]
+            if charm_conf.get('image_import_conversion', False):
+                sync_command += [
+                    '--image-import-conversion'
+                ]
 
             if charm_conf.get('set_latest_property', False):
                 sync_command += [

hooks/hooks.py

@@ -183,7 +183,8 @@ class MirrorsConfigServiceContext(OSContextGenerator):
                     user_agent=config['user_agent'],
                     custom_properties=config['custom_properties'],
                     hypervisor_mapping=config['hypervisor_mapping'],
-                    set_latest_property=config['set_latest_property'])
+                    set_latest_property=config['set_latest_property'],
+                    image_import_conversion=config['image_import_conversion'])
 
 
 def ensure_perms():

templates/mirrors.yaml

@@ -9,6 +9,7 @@ region: {{ region }}
 cloud_name: {{ cloud_name }}
 content_id_template: {{ content_id_template }}
 hypervisor_mapping: {{ hypervisor_mapping }}
+image_import_conversion: {{ image_import_conversion }}
 {% if custom_properties %}
 custom_properties: {{ custom_properties }}
 {% endif %}