From f8842781cdc7a7a2a82333f3f728e0dfac30a501 Mon Sep 17 00:00:00 2001
From: John Griffith <john.griffith@solidfire.com>
Date: Mon, 4 Feb 2013 17:54:56 -0700
Subject: [PATCH] Copy glance_image_metadata when cloning volumes.

When cloning a volume we were not capturing/copying
the glance_image_metadata from the source volume.

This change implements a copy_image_metadata_from_vol_to_vol.
So now we can clone bootable volumes without going back to glance
or messing with them otherwise, they're just ready to be booted.

Fixes bug: 1115634

Change-Id: I859bb2550267c6a5142e85ec89f1c7ff885588ac
---
 cinder/db/api.py                            | 13 ++++++++++
 cinder/db/sqlalchemy/api.py                 | 27 +++++++++++++++++++++
 cinder/tests/test_volume_glance_metadata.py | 16 ++++++++++++
 cinder/volume/manager.py                    | 12 +++------
 4 files changed, 60 insertions(+), 8 deletions(-)

diff --git a/cinder/db/api.py b/cinder/db/api.py
index 0b2ab8d88..065083e17 100644
--- a/cinder/db/api.py
+++ b/cinder/db/api.py
@@ -441,6 +441,19 @@ def volume_glance_metadata_delete_by_snapshot(context, snapshot_id):
     return IMPL.volume_glance_metadata_delete_by_snapshot(context, snapshot_id)
 
 
+def volume_glance_metadata_copy_from_volume_to_volume(context,
+                                                      src_volume_id,
+                                                      volume_id):
+    """
+    Update the Glance metadata for a volume by copying all of the key:value
+    pairs from the originating volume. This is so that a volume created from
+    the volume (clone) will retain the original metadata.
+    """
+    return IMPL.volume_glance_metadata_copy_from_volume_to_volume(
+        context,
+        src_volume_id,
+        volume_id)
+
 ###################
 
 
diff --git a/cinder/db/sqlalchemy/api.py b/cinder/db/sqlalchemy/api.py
index ddce45db6..1818b96b4 100644
--- a/cinder/db/sqlalchemy/api.py
+++ b/cinder/db/sqlalchemy/api.py
@@ -1597,6 +1597,33 @@ def volume_glance_metadata_copy_to_snapshot(context, snapshot_id, volume_id,
             vol_glance_metadata.save(session=session)
 
 
+@require_context
+@require_volume_exists
+def volume_glance_metadata_copy_from_volume_to_volume(context,
+                                                      src_volume_id,
+                                                      volume_id,
+                                                      session=None):
+    """
+    Update the Glance metadata for a volume by copying all of the key:value
+    pairs from the originating volume. This is so that a volume created from
+    the volume (clone) will retain the original metadata.
+    """
+    if session is None:
+        session = get_session()
+
+    metadata = volume_glance_metadata_get(context,
+                                          src_volume_id,
+                                          session=session)
+    with session.begin():
+        for meta in metadata:
+            vol_glance_metadata = models.VolumeGlanceMetadata()
+            vol_glance_metadata.volume_id = volume_id
+            vol_glance_metadata.key = meta['key']
+            vol_glance_metadata.value = meta['value']
+
+            vol_glance_metadata.save(session=session)
+
+
 @require_context
 @require_volume_exists
 def volume_glance_metadata_copy_to_volume(context, volume_id, snapshot_id,
diff --git a/cinder/tests/test_volume_glance_metadata.py b/cinder/tests/test_volume_glance_metadata.py
index f1a36d2ac..5aa42d8b1 100644
--- a/cinder/tests/test_volume_glance_metadata.py
+++ b/cinder/tests/test_volume_glance_metadata.py
@@ -113,3 +113,19 @@ class VolumeGlanceMetadataTestCase(test.TestCase):
         for meta in db.volume_snapshot_glance_metadata_get(ctxt, 100):
             for (key, value) in expected_meta.items():
                 self.assertEquals(meta[key], value)
+
+    def test_vol_glance_metadata_copy_to_volume(self):
+        ctxt = context.get_admin_context()
+        db.volume_create(ctxt, {'id': 1})
+        db.volume_create(ctxt, {'id': 100, 'source_volid': 1})
+        vol_meta = db.volume_glance_metadata_create(ctxt, 1, 'key1',
+                                                    'value1')
+        db.volume_glance_metadata_copy_from_volume_to_volume(ctxt, 100, 1)
+
+        expected_meta = {'id': '100',
+                         'key': 'key1',
+                         'value': 'value1'}
+
+        for meta in db.volume_glance_metadata_get(ctxt, 100):
+            for (key, value) in expected_meta.items():
+                self.assertEquals(meta[key], value)
diff --git a/cinder/volume/manager.py b/cinder/volume/manager.py
index 40dfafe03..6ad70fb18 100644
--- a/cinder/volume/manager.py
+++ b/cinder/volume/manager.py
@@ -176,12 +176,12 @@ class VolumeManager(manager.SchedulerDependentManager):
                     snapshot_ref)
             elif source_volid is not None:
                 src_vref = self.db.volume_get(context, source_volid)
-                self.db.volume_update(context, src_vref['id'],
-                                      {'status': 'in use'})
                 model_update = self.driver.create_cloned_volume(volume_ref,
                                                                 src_vref)
-                self.db.volume_update(context, src_vref['id'],
-                                      {'status': src_vref['status']})
+                self.db.volume_glance_metadata_copy_from_volume_to_volume(
+                    context,
+                    source_volid,
+                    volume_id)
             else:
                 # create the volume from an image
                 image_service, image_id = \
@@ -221,10 +221,6 @@ class VolumeManager(manager.SchedulerDependentManager):
         self._reset_stats()
 
         if image_id and not cloned:
-            # NOTE(jdg): Our current ref hasn't been updated since
-            # the create, need to update ref to get provider_location
-            # before trying to perform the copy operation
-            volume_ref = self.db.volume_get(context, volume_id)
             if image_meta:
                 # Copy all of the Glance image properties to the
                 # volume_glance_metadata table for future reference.
-- 
2.45.2