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