def detect_fs_type(self, path):
try:
for line in open("/etc/mtab"):
fields = line.split(' ')
if (len(fields) >= 3) and (fields[1] == path):
return fields[2]
except Exception, e:
log.warning("Could not detect filesystem type for %s\n%s" % (path, e))
def _snapshot_system(self, start_fresh=False, verbose=False, clean=False):
exists = self.image_exists()
if clean:
log.info("Cleaning existing snapshot first.")
start_fresh=True
elif not exists:
log.info("No existing image found, creating a new one")
start_fresh=True
elif exists:
log.info("Existing image found, attempting to use.")
image_stats = self.stat(self.imagepath)
log.debug("Image stats:\n%s" % (image_stats))
if self.imagesize:
# requested size does not match current size
if self.imagesize != image_stats['size']:
log.warning("Requested size (%d) does not match current file (%d). Starting from scratch." % (self.imagesize, image_stats['size']))
start_fresh = True
else:
# image size does not match partition size
if image_stats['size'] != self.statvfs()['size']:
log.warning("Root partition size does not match image size. Starting from scratch")
start_fresh = True
if start_fresh:
# makesure image is unmounted, then destroy and recreate image.
log.info("Unmounting Image")
self.umount_image()
log.info("Destroying old files")
self.destroy_files(self.imagepath, self.mountpoint)
log.info("Creating new image")
self.create_image(self.imagepath, self.imagesize)
try:
log.info("Syncing file system")
self.mount_image()
self.sync_fs(verbose)
self.umount_image()
except ImageUtilError, e:
# Cleanup after failed sync
self.umount_image()
self.destroy_files(self.imagepath, self.mountpoint)
raise e
