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#!/usr/bin/python3
#
# Copyright (C) 2014 SUSE LINUX Products GmbH, Nuernberg, Germany.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library. If not, see
# <http://www.gnu.org/licenses/>.
#
# Authors:
# Jim Fehlig <jfehlig@suse.com>
#
# Read native Xen configuration format, convert to libvirt domXML, and
# import (virsh define <xml>) into libvirt.
import sys
import os
import argparse
import re
from xml.etree import ElementTree
try:
import libvirt
except ImportError:
print('Unable to import the libvirt module. Is libvirt-python installed?')
sys.exit(1)
parser = argparse.ArgumentParser(description='Import Xen domain configuration into libvirt')
parser.add_argument('-c', '--convert-only', help='Convert Xen domain configuration into libvirt domXML, but do not import into libvirt', action='store_true', dest='convert_only')
parser.add_argument('-r', '--recursive', help='Operate recursivelly on all Xen domain configuration rooted at path', action='store_true')
parser.add_argument('-f', '--format', help='Format of Xen domain configuration. Supported formats are xm and sexpr', choices=['xm', 'sexpr'], default=None)
parser.add_argument('-v', '--verbose', help='Print information about the import process', action='store_true')
parser.add_argument('path', help='Path to Xen domain configuration')
def print_verbose(msg):
if args.verbose:
print(msg)
def check_config(path, config):
isbinary = os.system('file -b ' + path + ' | grep text > /dev/null')
if isbinary:
print('Skipping %s (not a valid Xen configuration file)' % path)
return 'unknown'
for line in config.splitlines():
if len(line) == 0 or line.startswith('#'):
continue
if line.startswith('<domain'):
# XML is not a supported conversion format
break
if line.startswith('(domain'):
print('Found sexpr formatted file %s' % path)
return 'sexpr'
if '=' in line:
print('Found xm formatted file %s' % path)
return 'xm'
break
print('Skipping %s (not a valid Xen configuration file)' % path)
return 'unknown'
def import_domain(conn, path, format=None, convert_only=False):
f = open(path, 'r')
config = f.read()
print_verbose('Xen domain configuration read from %s:\n %s' % (path, config))
if format is None:
format = check_config(path, config)
if format == 'sexpr':
print_verbose('scrubbing domid from configuration')
config = re.sub("\(domid [0-9]*\)", "", config)
print_verbose('scrubbed sexpr:\n %s' % config)
xml = conn.domainXMLFromNative('xen-sxpr', config, 0)
elif format == 'xm':
xml = conn.domainXMLFromNative('xen-xm', config, 0)
else:
# Return to continue on to next file (if recursive)
return
f.close()
# domUloader is no longer available in SLES12, replace with pygrub
tree = ElementTree.fromstring(xml)
bl = tree.find('.//bootloader')
if bl is not None and bl.text is not None and 'domUloader' in bl.text:
bl.text = 'pygrub'
xml = ElementTree.tostring(tree)
print_verbose('Successfully converted Xen domain configuration to '
'libvirt domXML:\n %s' % xml)
if convert_only:
print(xml)
else:
print_verbose('Importing converted libvirt domXML into libvirt...')
dom = conn.defineXML(xml.decode("utf-8"))
if dom is None:
print('Failed to define domain from converted domXML')
sys.exit(1)
print_verbose('domXML successfully imported into libvirt')
args = parser.parse_args()
path = args.path
# Connect to libvirt
conn = libvirt.open(None)
if conn is None:
print('Failed to open connection to the hypervisor')
sys.exit(1)
if args.recursive:
try:
for root, dirs, files in os.walk(path):
for name in files:
abs_name = os.path.join(root, name)
print_verbose('Processing file %s' % abs_name)
import_domain(conn, abs_name, args.format, args.convert_only)
except IOError:
print('Failed to open/read path %s' % path)
sys.exit(1)
else:
import_domain(conn, args.path, args.format, args.convert_only)
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