Move mkfs from libvirt.utils to utils

Related to blueprint xenapi-config-drive

Move mkfs function to nova.utils, so configdrive module does not depend
on the libvirt module. This way, the configdrive module could be used
by other virt modules.

Change-Id: Ibda2aacfa0b66bc087e397df1474b5dfbe86d923

1 files changed, 21 insertions, 0 deletions

diff --git a/nova/utils.py b/nova/utils.py
index 015ff915a..f49f3bc43 100644
--- a/nova/utils.py
+++ b/nova/utils.py
@@ -1328,3 +1328,24 @@ def ensure_tree(path):
                 raise
         else:
             raise
+
+
+def mkfs(fs, path, label=None):
+    """Format a file or block device
+
+    :param fs: Filesystem type (examples include 'swap', 'ext3', 'ext4'
+               'btrfs', etc.)
+    :param path: Path to file or block device to format
+    :param label: Volume label to use
+    """
+    if fs == 'swap':
+        execute('mkswap', path)
+    else:
+        args = ['mkfs', '-t', fs]
+        #add -F to force no interactive excute on non-block device.
+        if fs in ['ext3', 'ext4']:
+            args.extend(['-F'])
+        if label:
+            args.extend(['-n', label])
+        args.append(path)
+        execute(*args)