def copy_image(src, dest, host=None, receive=False):
"""Copy a disk image to an existing directory
:param src: Source image
:param dest: Destination path
:param host: Remote host
:param receive: Reverse the rsync direction
"""
if not host:
# We shell out to cp because that will intelligently copy
# sparse files. I.E. holes will not be written to DEST,
# rather recreated efficiently. In addition, since
# coreutils 8.11, holes can be read efficiently too.
execute('cp', src, dest)
else:
if receive:
src = "%s:%s" % (utils.safe_ip_format(host), src)
else:
dest = "%s:%s" % (utils.safe_ip_format(host), dest)
# Try rsync first as that can compress and create sparse dest files.
# Note however that rsync currently doesn't read sparse files
# efficiently: https://bugzilla.samba.org/show_bug.cgi?id=8918
# At least network traffic is mitigated with compression.
try:
# Do a relatively light weight test first, so that we
# can fall back to scp, without having run out of space
# on the destination for example.
execute('rsync', '--sparse', '--compress', '--dry-run', src, dest)
except processutils.ProcessExecutionError:
execute('scp', src, dest)
else:
execute('rsync', '--sparse', '--compress', src, dest)
def copy_image(src, dest, host=None, receive=False):
"""Copy a disk image to an existing directory
:param src: Source image
:param dest: Destination path
:param host: Remote host
:param receive: Reverse the rsync direction
"""
if not host:
# We shell out to cp because that will intelligently copy
# sparse files. I.E. holes will not be written to DEST,
# rather recreated efficiently. In addition, since
# coreutils 8.11, holes can be read efficiently too.
execute('cp', src, dest)
else:
if receive:
src = "%s:%s" % (utils.safe_ip_format(host), src)
else:
dest = "%s:%s" % (utils.safe_ip_format(host), dest)
# Try rsync first as that can compress and create sparse dest files.
# Note however that rsync currently doesn't read sparse files
# efficiently: https://bugzilla.samba.org/show_bug.cgi?id=8918
# At least network traffic is mitigated with compression.
try:
# Do a relatively light weight test first, so that we
# can fall back to scp, without having run out of space
# on the destination for example.
execute('rsync', '--sparse', '--compress', '--dry-run', src, dest)
except processutils.ProcessExecutionError:
execute('scp', src, dest)
else:
execute('rsync', '--sparse', '--compress', src, dest)
def test_safe_ip_format(self):
self.assertEqual("[::1]", utils.safe_ip_format("::1"))
self.assertEqual("127.0.0.1", utils.safe_ip_format("127.0.0.1"))
self.assertEqual("[::ffff:127.0.0.1]",
utils.safe_ip_format("::ffff:127.0.0.1"))
self.assertEqual("localhost", utils.safe_ip_format("localhost"))
def test_safe_ip_format(self):
self.assertEqual("[::1]", utils.safe_ip_format("::1"))
self.assertEqual("127.0.0.1", utils.safe_ip_format("127.0.0.1"))
self.assertEqual("[::ffff:127.0.0.1]", utils.safe_ip_format(
"::ffff:127.0.0.1"))
self.assertEqual("localhost", utils.safe_ip_format("localhost"))