cinder-volume: to reuse loop dev

Every time cinder-volume is restarted with
"/etc/init.d/cinder-volume restart" a new loop dev
is created for lvm volume backing file instead of
reuse the existing loop dev

Signed-off-by: Vu Tran <vu.tran@windriver.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/meta-openstack/recipes-devtools/python/python-cinder/cinder-volume b/meta-openstack/recipes-devtools/python/python-cinder/cinder-volume
index cdad401..ad1d4de 100644
--- a/meta-openstack/recipes-devtools/python/python-cinder/cinder-volume
+++ b/meta-openstack/recipes-devtools/python/python-cinder/cinder-volume
@@ -30,7 +30,10 @@ start()
     fi
 
         #Load volume group
-        DEV=`losetup -f --show /etc/cinder/volumes-backing`
+        DEV=`losetup -j /etc/cinder/volumes-backing | cut -d ":" -f 1 | head -1`
+        if [ -z $DEV ]; then
+                DEV=`losetup -f --show /etc/cinder/volumes-backing`
+        fi
         if ! vgs cinder-volumes &> /dev/null ; then
             vgcreate cinder-volumes $DEV
         fi