574 lines
19 KiB
Python
574 lines
19 KiB
Python
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# Copyright 2013-2014 Red Hat, Inc.
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#
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# This work is licensed under the GNU GPLv2 or later.
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# See the COPYING file in the top-level directory.
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import os
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import sys
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import libvirt
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from . import cli
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from .cli import fail, fail_conflicting, print_stdout, print_stderr
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from .devices import DeviceConsole
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from .guest import Guest
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from .logger import log
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from . import xmlutil
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###################
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# Utility helpers #
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###################
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def prompt_yes_or_no(msg):
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while 1:
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printmsg = msg + " (y/n): "
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sys.stdout.write(printmsg)
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sys.stdout.flush()
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inp = sys.stdin.readline().lower().strip()
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if inp in ["y", "yes"]:
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return True
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elif inp in ["n", "no"]:
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return False
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else:
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print_stdout(_("Please enter 'yes' or 'no'."))
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def get_diff(origxml, newxml):
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diff = xmlutil.diff(origxml, newxml, "Original XML", "Altered XML")
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if diff:
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log.debug("XML diff:\n%s", diff)
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else:
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log.debug("No XML diff, didn't generate any change.")
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return diff
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def set_os_variant(options, guest):
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if options.os_variant is None:
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return
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osdata = cli.parse_os_variant(options.os_variant)
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if osdata.get_name():
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guest.set_os_name(osdata.get_name())
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def defined_xml_is_unchanged(conn, domain, original_xml):
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rawxml = cli.get_xmldesc(domain, inactive=True)
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new_xml = Guest(conn, parsexml=rawxml).get_xml()
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return new_xml == original_xml
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################
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# Change logic #
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################
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def _find_objects_to_edit(guest, action_name, editval, parserclass):
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objlist = xmlutil.listify(parserclass.lookup_prop(guest))
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idx = None
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if editval is None:
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idx = 1
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elif (editval.isdigit() or
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editval.startswith("-") and editval[1:].isdigit()):
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idx = int(editval)
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if idx is not None:
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# Edit device by index
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if idx == 0:
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fail(_("Invalid --edit option '%s'") % editval)
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if not objlist:
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fail(_("No --%s objects found in the XML") %
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parserclass.cli_arg_name)
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if len(objlist) < abs(idx):
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fail(ngettext("'--edit %(number)s' requested but there's only "
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"%(max)s --%(type)s object in the XML",
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"'--edit %(number)s' requested but there are only "
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"%(max)s --%(type)s objects in the XML",
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len(objlist)) %
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{"number": idx, "max": len(objlist),
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"type": parserclass.cli_arg_name})
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if idx > 0:
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idx -= 1
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inst = objlist[idx]
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elif editval == "all":
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# Edit 'all' devices
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inst = objlist[:]
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else:
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# Lookup device by the passed prop string
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parserobj = parserclass(editval, guest=guest)
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inst = parserobj.lookup_child_from_option_string()
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if not inst:
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fail(_("No matching objects found for %s") %
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("--%s %s" % (action_name, editval)))
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return inst
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def check_action_collision(options):
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actions = ["edit", "add-device", "remove-device", "build-xml"]
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collisions = []
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for cliname in actions:
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optname = cliname.replace("-", "_")
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if getattr(options, optname) not in [False, -1]:
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collisions.append(cliname)
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if len(collisions) == 0:
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fail(_("One of %s must be specified.") %
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", ".join(["--" + c for c in actions]))
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if len(collisions) > 1:
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fail(_("Conflicting options %s") %
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", ".join(["--" + c for c in collisions]))
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def check_xmlopt_collision(options):
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collisions = []
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for parserclass in cli.VIRT_PARSERS + [cli.ParserXML]:
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if getattr(options, parserclass.cli_arg_name):
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collisions.append(parserclass)
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if len(collisions) == 0:
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fail(_("No change specified."))
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if len(collisions) != 1:
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fail(_("Only one change operation may be specified "
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"(conflicting options %s)") %
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[c.cli_flag_name() for c in collisions])
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return collisions[0]
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def action_edit(guest, options, parserclass):
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if parserclass.guest_propname:
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inst = _find_objects_to_edit(guest, "edit", options.edit, parserclass)
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else:
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inst = guest
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if options.edit and options.edit != '1' and options.edit != 'all':
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fail(_("'--edit %(option)s' doesn't make sense with "
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"--%(objecttype)s, just use empty '--edit'") %
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{"option": options.edit,
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"objecttype": parserclass.cli_arg_name})
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if options.os_variant is not None:
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fail(_("--os-variant/--osinfo is not supported with --edit"))
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devs = []
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for editinst in xmlutil.listify(inst):
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devs += cli.run_parser(options, guest, parserclass, editinst=editinst)
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return devs
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def action_add_device(guest, options, parserclass, devs):
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if not parserclass.prop_is_list(guest):
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fail(_("Cannot use --add-device with --%s") % parserclass.cli_arg_name)
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set_os_variant(options, guest)
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if devs:
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for dev in devs:
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guest.add_device(dev)
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else:
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devs = cli.run_parser(options, guest, parserclass)
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for dev in devs:
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dev.set_defaults(guest)
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return devs
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def action_remove_device(guest, options, parserclass):
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if not parserclass.prop_is_list(guest):
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fail(_("Cannot use --remove-device with --%s") %
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parserclass.cli_arg_name)
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if options.os_variant is not None:
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fail(_("--os-variant/--osinfo is not supported with --remove-device"))
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devs = _find_objects_to_edit(guest, "remove-device",
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getattr(options, parserclass.cli_arg_name)[-1], parserclass)
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devs = xmlutil.listify(devs)
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# Check for console duplicate devices
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for dev in devs[:]:
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condup = DeviceConsole.get_console_duplicate(guest, dev)
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if condup:
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log.debug("Found duplicate console device:\n%s", condup.get_xml())
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devs.append(condup)
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for dev in devs:
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guest.remove_device(dev)
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return devs
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def action_build_xml(options, parserclass, guest):
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if not parserclass.guest_propname:
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fail(_("--build-xml not supported for --%s") %
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parserclass.cli_arg_name)
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if options.os_variant is not None:
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fail(_("--os-variant/--osinfo is not supported with --build-xml"))
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devs = cli.run_parser(options, guest, parserclass)
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for dev in devs:
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dev.set_defaults(guest)
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return devs
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def setup_device(dev):
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if getattr(dev, "DEVICE_TYPE", None) != "disk":
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return
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log.debug("Doing setup for disk=%s", dev)
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dev.build_storage(cli.get_meter())
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def define_changes(conn, inactive_xmlobj, devs, action, confirm):
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if confirm:
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if not prompt_yes_or_no(
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_("Define '%s' with the changed XML?") % inactive_xmlobj.name):
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return False
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if action == "hotplug":
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for dev in devs:
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setup_device(dev)
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dom = conn.defineXML(inactive_xmlobj.get_xml())
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print_stdout(_("Domain '%s' defined successfully.") % inactive_xmlobj.name)
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return dom
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def start_domain_transient(conn, xmlobj, devs, action, confirm):
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if confirm:
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if not prompt_yes_or_no(
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_("Start '%s' with the changed XML?") % xmlobj.name):
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return False
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if action == "hotplug":
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for dev in devs:
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setup_device(dev)
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try:
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dom = conn.createXML(xmlobj.get_xml())
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except libvirt.libvirtError as e:
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fail(_("Failed starting domain '%(domain)s': %(error)s") % {
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"domain": xmlobj.name,
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"error": e,
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})
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else:
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print_stdout(_("Domain '%s' started successfully.") % xmlobj.name)
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return dom
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def update_changes(domain, devs, action, confirm):
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if action == "hotplug":
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msg_confirm = _("%(xml)s\n\nHotplug this device to the guest "
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"'%(domain)s'?")
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msg_success = _("Device hotplug successful.")
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msg_fail = _("Error attempting device hotplug: %(error)s")
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elif action == "hotunplug":
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msg_confirm = _("%(xml)s\n\nHotunplug this device from the guest "
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"'%(domain)s'?")
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msg_success = _("Device hotunplug successful.")
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msg_fail = _("Error attempting device hotunplug: %(error)s")
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elif action == "update":
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msg_confirm = _("%(xml)s\n\nUpdate this device for the guest "
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"'%(domain)s'?")
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msg_success = _("Device update successful.")
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msg_fail = _("Error attempting device update: %(error)s")
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for dev in devs:
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xml = dev.get_xml()
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if confirm:
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msg = msg_confirm % {
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"xml": xml,
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"domain": domain.name(),
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}
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if not prompt_yes_or_no(msg):
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continue
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if action == "hotplug":
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setup_device(dev)
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try:
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if action == "hotplug":
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domain.attachDeviceFlags(xml, libvirt.VIR_DOMAIN_AFFECT_LIVE)
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elif action == "hotunplug":
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domain.detachDeviceFlags(xml, libvirt.VIR_DOMAIN_AFFECT_LIVE)
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elif action == "update":
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domain.updateDeviceFlags(xml, libvirt.VIR_DOMAIN_AFFECT_LIVE)
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except libvirt.libvirtError as e:
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if "VIRTXML_TESTSUITE_UPDATE_IGNORE_FAIL" not in os.environ:
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fail(msg_fail % {"error": e})
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print_stdout(msg_success)
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if confirm:
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print_stdout("")
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def prepare_changes(orig_xmlobj, options, parserclass, devs=None):
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"""
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Parse the command line device/XML arguments, and apply the changes to
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a copy of the passed in xmlobj.
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:returns: (list of device objects, action string, altered xmlobj)
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"""
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origxml = orig_xmlobj.get_xml()
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xmlobj = orig_xmlobj.__class__(conn=orig_xmlobj.conn, parsexml=origxml)
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has_edit = options.edit != -1
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is_xmlcli = parserclass is cli.ParserXML
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if is_xmlcli and not has_edit:
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fail(_("--xml can only be used with --edit"))
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if has_edit:
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if is_xmlcli:
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devs = []
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cli.parse_xmlcli(xmlobj, options)
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else:
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devs = action_edit(xmlobj, options, parserclass)
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action = "update"
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elif options.add_device:
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devs = action_add_device(xmlobj, options, parserclass, devs)
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action = "hotplug"
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elif options.remove_device:
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devs = action_remove_device(xmlobj, options, parserclass)
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action = "hotunplug"
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newxml = xmlobj.get_xml()
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diff = get_diff(origxml, newxml)
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if not diff:
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log.warning(_("No XML diff was generated. The requested "
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"changes will have no effect."))
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if options.print_diff:
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if diff:
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print_stdout(diff)
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elif options.print_xml:
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print_stdout(newxml)
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return devs, action, xmlobj
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#######################
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# CLI option handling #
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#######################
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def parse_args():
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parser = cli.setupParser(
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"%(prog)s [options]",
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_("Edit libvirt XML using command line options."),
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introspection_epilog=True)
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cli.add_connect_option(parser, "virt-xml")
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parser.add_argument("domain", nargs='?',
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help=_("Domain name, id, or uuid"))
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actg = parser.add_argument_group(_("XML actions"))
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actg.add_argument("--edit", nargs='?', default=-1,
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help=_("Edit VM XML. Examples:\n"
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"--edit --disk ... (edit first disk device)\n"
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"--edit 2 --disk ... (edit second disk device)\n"
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"--edit all --disk ... (edit all disk devices)\n"
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"--edit target=hda --disk ... (edit disk 'hda')\n"))
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actg.add_argument("--remove-device", action="store_true",
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help=_("Remove specified device. Examples:\n"
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"--remove-device --disk 1 (remove first disk)\n"
|
||
|
|
"--remove-device --disk all (remove all disks)\n"
|
||
|
|
"--remove-device --disk /some/path"))
|
||
|
|
actg.add_argument("--add-device", action="store_true",
|
||
|
|
help=_("Add specified device. Example:\n"
|
||
|
|
"--add-device --disk ..."))
|
||
|
|
actg.add_argument("--build-xml", action="store_true",
|
||
|
|
help=_("Output built device XML. Domain is optional but "
|
||
|
|
"recommended to ensure optimal defaults."))
|
||
|
|
|
||
|
|
outg = parser.add_argument_group(_("Output options"))
|
||
|
|
outg.add_argument("--update", action="store_true",
|
||
|
|
help=_("Apply changes to the running VM.\n"
|
||
|
|
"With --add-device, this is a hotplug operation.\n"
|
||
|
|
"With --remove-device, this is a hotunplug operation.\n"
|
||
|
|
"With --edit, this is an update device operation."))
|
||
|
|
define_g = outg.add_mutually_exclusive_group()
|
||
|
|
define_g.add_argument("--define", action="store_true",
|
||
|
|
help=_("Force defining the domain. Only required if a --print "
|
||
|
|
"option was specified."))
|
||
|
|
define_g.add_argument("--no-define", dest='define', action="store_false",
|
||
|
|
help=_("Force not defining the domain."))
|
||
|
|
define_g.set_defaults(define=None)
|
||
|
|
outg.add_argument("--start", action="store_true",
|
||
|
|
help=_("Start the domain."))
|
||
|
|
outg.add_argument("--print-diff", action="store_true",
|
||
|
|
help=_("Only print the requested change, in diff format"))
|
||
|
|
outg.add_argument("--print-xml", action="store_true",
|
||
|
|
help=_("Only print the requested change, in full XML format"))
|
||
|
|
outg.add_argument("--confirm", action="store_true",
|
||
|
|
help=_("Require confirmation before saving any results."))
|
||
|
|
|
||
|
|
cli.add_os_variant_option(parser, virtinstall=False)
|
||
|
|
|
||
|
|
g = parser.add_argument_group(_("XML options"))
|
||
|
|
cli.add_disk_option(g, editexample=True)
|
||
|
|
cli.add_net_option(g)
|
||
|
|
cli.add_gfx_option(g)
|
||
|
|
cli.add_metadata_option(g)
|
||
|
|
cli.add_memory_option(g)
|
||
|
|
cli.vcpu_cli_options(g, editexample=True)
|
||
|
|
cli.add_xml_option(g)
|
||
|
|
cli.add_guest_xml_options(g)
|
||
|
|
cli.add_boot_options(g)
|
||
|
|
cli.add_device_options(g)
|
||
|
|
|
||
|
|
misc = parser.add_argument_group(_("Miscellaneous Options"))
|
||
|
|
cli.add_misc_options(misc, prompt=False, printxml=False, dryrun=False)
|
||
|
|
|
||
|
|
cli.autocomplete(parser)
|
||
|
|
|
||
|
|
return parser.parse_args()
|
||
|
|
|
||
|
|
|
||
|
|
###################
|
||
|
|
# main() handling #
|
||
|
|
###################
|
||
|
|
|
||
|
|
def main(conn=None):
|
||
|
|
cli.earlyLogging()
|
||
|
|
options = parse_args()
|
||
|
|
|
||
|
|
if (options.confirm or options.print_xml or
|
||
|
|
options.print_diff or options.build_xml):
|
||
|
|
options.quiet = False
|
||
|
|
cli.setupLogging("virt-xml", options.debug, options.quiet)
|
||
|
|
|
||
|
|
if cli.check_option_introspection(options):
|
||
|
|
return 0
|
||
|
|
if cli.check_osinfo_list(options):
|
||
|
|
return 0
|
||
|
|
|
||
|
|
options.stdinxml = None
|
||
|
|
if not options.domain and not options.build_xml:
|
||
|
|
if not sys.stdin.closed and not sys.stdin.isatty():
|
||
|
|
if options.confirm:
|
||
|
|
fail(_("Can't use --confirm with stdin input."))
|
||
|
|
if options.update:
|
||
|
|
fail(_("Can't use --update with stdin input."))
|
||
|
|
options.stdinxml = sys.stdin.read()
|
||
|
|
else:
|
||
|
|
fail(_("A domain must be specified"))
|
||
|
|
|
||
|
|
# Default to --define, unless:
|
||
|
|
# --no-define explicitly specified
|
||
|
|
# --print-* option is used
|
||
|
|
# XML input came from stdin
|
||
|
|
if not options.print_xml and not options.print_diff:
|
||
|
|
if options.stdinxml:
|
||
|
|
if not options.define:
|
||
|
|
options.print_xml = True
|
||
|
|
else:
|
||
|
|
if options.define is None:
|
||
|
|
options.define = True
|
||
|
|
if options.confirm and not options.print_xml:
|
||
|
|
options.print_diff = True
|
||
|
|
|
||
|
|
# Ensure only one of these actions wash specified
|
||
|
|
# --edit
|
||
|
|
# --remove-device
|
||
|
|
# --add-device
|
||
|
|
# --build-xml
|
||
|
|
check_action_collision(options)
|
||
|
|
|
||
|
|
# Ensure there wasn't more than one device/xml config option
|
||
|
|
# specified. So reject '--disk X --network X'
|
||
|
|
parserclass = check_xmlopt_collision(options)
|
||
|
|
|
||
|
|
if options.update and not parserclass.guest_propname:
|
||
|
|
fail(_("Don't know how to --update for --%s") %
|
||
|
|
(parserclass.cli_arg_name))
|
||
|
|
|
||
|
|
conn = cli.getConnection(options.connect, conn)
|
||
|
|
|
||
|
|
domain = None
|
||
|
|
active_xmlobj = None
|
||
|
|
inactive_xmlobj = None
|
||
|
|
if options.domain:
|
||
|
|
domain, inactive_xmlobj, active_xmlobj = cli.get_domain_and_guest(
|
||
|
|
conn, options.domain)
|
||
|
|
else:
|
||
|
|
inactive_xmlobj = Guest(conn, parsexml=options.stdinxml)
|
||
|
|
vm_is_running = bool(active_xmlobj)
|
||
|
|
|
||
|
|
if options.build_xml:
|
||
|
|
devs = action_build_xml(options, parserclass, inactive_xmlobj)
|
||
|
|
for dev in devs:
|
||
|
|
# pylint: disable=no-member
|
||
|
|
print_stdout(xmlutil.unindent_device_xml(dev.get_xml()))
|
||
|
|
return 0
|
||
|
|
|
||
|
|
devs = None
|
||
|
|
performed_update = False
|
||
|
|
if options.update:
|
||
|
|
if options.update and options.start:
|
||
|
|
fail_conflicting("--update", "--start")
|
||
|
|
if vm_is_running:
|
||
|
|
devs, action, dummy = prepare_changes(
|
||
|
|
active_xmlobj, options, parserclass)
|
||
|
|
update_changes(domain, devs, action, options.confirm)
|
||
|
|
performed_update = True
|
||
|
|
else:
|
||
|
|
log.warning(
|
||
|
|
_("The VM is not running, --update is inapplicable."))
|
||
|
|
if not options.define:
|
||
|
|
# --update and --no-define passed, so we are done
|
||
|
|
return 0
|
||
|
|
|
||
|
|
original_xml = inactive_xmlobj.get_xml()
|
||
|
|
devs, action, xmlobj_to_define = prepare_changes(
|
||
|
|
inactive_xmlobj, options, parserclass, devs=devs)
|
||
|
|
if not options.define:
|
||
|
|
if options.start:
|
||
|
|
start_domain_transient(conn, xmlobj_to_define, devs,
|
||
|
|
action, options.confirm)
|
||
|
|
return 0
|
||
|
|
|
||
|
|
dom = define_changes(conn, xmlobj_to_define,
|
||
|
|
devs, action, options.confirm)
|
||
|
|
if not dom:
|
||
|
|
# --confirm user said 'no'
|
||
|
|
return 0
|
||
|
|
|
||
|
|
if options.start:
|
||
|
|
try:
|
||
|
|
dom.create()
|
||
|
|
except libvirt.libvirtError as e: # pragma: no cover
|
||
|
|
fail(_("Failed starting domain '%(domain)s': %(error)s") % {
|
||
|
|
"domain": inactive_xmlobj.name,
|
||
|
|
"error": e,
|
||
|
|
})
|
||
|
|
print_stdout(_("Domain '%s' started successfully.") %
|
||
|
|
inactive_xmlobj.name)
|
||
|
|
|
||
|
|
elif vm_is_running and not performed_update:
|
||
|
|
print_stdout(
|
||
|
|
_("Changes will take effect after the domain is fully powered off."))
|
||
|
|
elif defined_xml_is_unchanged(conn, domain, original_xml):
|
||
|
|
log.warning(_("XML did not change after domain define. You may "
|
||
|
|
"have changed a value that libvirt is setting by default."))
|
||
|
|
|
||
|
|
return 0
|
||
|
|
|
||
|
|
|
||
|
|
def runcli(): # pragma: no cover
|
||
|
|
try:
|
||
|
|
sys.exit(main())
|
||
|
|
except SystemExit as sys_e:
|
||
|
|
sys.exit(sys_e.code)
|
||
|
|
except KeyboardInterrupt:
|
||
|
|
log.debug("", exc_info=True)
|
||
|
|
print_stderr(_("Aborted at user request"))
|
||
|
|
except Exception as main_e:
|
||
|
|
fail(main_e)
|