Make sure to cleanup swift on unstack/relaunch.

- Fixes bug 1049553.

Change-Id: I9fef93d25512c014dfb882adf0e169487bf877d8

lib/swift

@@ -107,16 +107,17 @@ function configure_swift() {
     if [[ -e ${SWIFT_DATA_DIR}/drives/images/swift.img ]]; then
         if egrep -q ${SWIFT_DATA_DIR}/drives/sdb1 /proc/mounts; then
             sudo umount ${SWIFT_DATA_DIR}/drives/sdb1
+            sudo rm -f ${SWIFT_DATA_DIR}/drives/images/swift.img
         fi
-    else
-        mkdir -p  ${SWIFT_DATA_DIR}/drives/images
-        sudo touch  ${SWIFT_DATA_DIR}/drives/images/swift.img
-        sudo chown $USER: ${SWIFT_DATA_DIR}/drives/images/swift.img
-
-        dd if=/dev/zero of=${SWIFT_DATA_DIR}/drives/images/swift.img \
-            bs=1024 count=0 seek=${SWIFT_LOOPBACK_DISK_SIZE}
     fi
 
+    mkdir -p  ${SWIFT_DATA_DIR}/drives/images
+    sudo touch  ${SWIFT_DATA_DIR}/drives/images/swift.img
+    sudo chown $USER: ${SWIFT_DATA_DIR}/drives/images/swift.img
+
+    dd if=/dev/zero of=${SWIFT_DATA_DIR}/drives/images/swift.img \
+        bs=1024 count=0 seek=${SWIFT_LOOPBACK_DISK_SIZE}
+
     # Make a fresh XFS filesystem
     mkfs.xfs -f -i size=1024  ${SWIFT_DATA_DIR}/drives/images/swift.img
 

unstack.sh

@@ -65,6 +65,7 @@ fi
 # Swift runs daemons
 if is_service_enabled swift; then
     stop_swift
+    cleanup_swift
 fi
 
 # Apache has the WSGI processes