mirror of
https://github.com/virt-manager/virt-manager.git
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8c8fec6cb1
Makes it more clear what the distinction is. Set this in the parser class so the cli infrastructure can access it
537 lines
17 KiB
Python
Executable File
537 lines
17 KiB
Python
Executable File
#!/usr/bin/env python3
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#
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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 difflib
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import logging
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import os
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import re
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import sys
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import libvirt
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import virtinst
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from virtinst import cli
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from virtinst import xmlutil
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from virtinst.cli import fail, print_stdout, print_stderr
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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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if "VIRTINST_TEST_SUITE" in os.environ:
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inp = "yes"
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else:
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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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ret = "".join(difflib.unified_diff(origxml.splitlines(1),
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newxml.splitlines(1),
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fromfile="Original XML",
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tofile="Altered XML"))
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if ret:
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logging.debug("XML diff:\n%s", ret)
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else:
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logging.debug("No XML diff, didn't generate any change.")
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return ret
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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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osdata.set_os_name(guest)
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def get_domain_and_guest(conn, domstr):
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try:
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int(domstr)
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isint = True
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except ValueError:
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isint = False
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uuidre = "[a-fA-F0-9]{8}[-]([a-fA-F0-9]{4}[-]){3}[a-fA-F0-9]{12}$"
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isuuid = bool(re.match(uuidre, domstr))
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try:
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domain = None
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try:
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domain = conn.lookupByName(domstr)
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except Exception:
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# In case the VM has a UUID or ID for a name
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logging.debug("Error looking up domain by name", exc_info=True)
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if isint:
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domain = conn.lookupByID(int(domstr))
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elif isuuid:
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domain = conn.lookupByUUIDString(domstr)
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else:
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raise
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except libvirt.libvirtError as e:
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fail(_("Could not find domain '%s': %s") % (domstr, e))
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state = domain.info()[0]
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active_xmlobj = None
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inactive_xmlobj = virtinst.Guest(conn, parsexml=domain.XMLDesc(0))
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if state != libvirt.VIR_DOMAIN_SHUTOFF:
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active_xmlobj = inactive_xmlobj
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inactive_xmlobj = virtinst.Guest(conn,
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parsexml=domain.XMLDesc(libvirt.VIR_DOMAIN_XML_INACTIVE))
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return (domain, inactive_xmlobj, active_xmlobj)
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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(_("--edit %s requested but there's only %s "
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"--%s object in the XML") %
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(idx, len(objlist), 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 %s") %
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(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:
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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 %s' doesn't make sense with --%s, "
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"just use empty '--edit'") %
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(options.edit, parserclass.cli_arg_name))
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if options.os_variant is not None:
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fail(_("--os-variant is not supported with --edit"))
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return cli.parse_option_strings(options, guest, inst, editing=True)
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def action_add_device(guest, options, parserclass):
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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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devs = cli.parse_option_strings(options, guest, None)
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devs = xmlutil.listify(devs)
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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 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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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(conn, options, parserclass):
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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 is not supported with --build-xml"))
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guest = virtinst.Guest(conn)
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inst = parserclass.lookup_prop(guest)
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if parserclass.prop_is_list(guest):
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inst = inst.new()
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else:
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inst = inst.__class__(conn)
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devs = cli.parse_option_strings(options, guest, inst)
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devs = xmlutil.listify(devs)
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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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if getattr(dev, "virt_xml_setup", None) is True:
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return
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logging.debug("Doing setup for disk=%s", dev)
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dev.build_storage(cli.get_meter())
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dev.virt_xml_setup = True
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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 '%s': %s") % (xmlobj.name, e))
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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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for dev in devs:
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xml = dev.get_xml()
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if confirm:
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if action == "hotplug":
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prep = "to"
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elif action == "hotunplug":
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prep = "from"
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else:
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prep = "for"
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msg = ("%s\n\n%s this device %s guest '%s'?" %
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(xml, action.capitalize(), prep, domain.name()))
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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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fail(_("Error attempting device %s: %s") % (action, e))
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print_stdout(_("Device %s successful.") % action)
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if confirm:
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print_stdout("")
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def prepare_changes(xmlobj, options, parserclass):
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origxml = xmlobj.get_xml()
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if options.edit != -1:
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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)
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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 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
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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"
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"--remove-device --disk all (remove all disks)\n"
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"--remove-device --disk /some/path"))
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actg.add_argument("--add-device", action="store_true",
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help=_("Add specified device. Example:\n"
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"--add-device --disk ..."))
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actg.add_argument("--build-xml", action="store_true",
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help=_("Just output the built device XML, no domain required."))
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outg = parser.add_argument_group(_("Output options"))
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outg.add_argument("--update", action="store_true",
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help=_("Apply changes to the running VM.\n"
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"With --add-device, this is a hotplug operation.\n"
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"With --remove-device, this is a hotunplug operation.\n"
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"With --edit, this is an update device operation."))
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define_g = outg.add_mutually_exclusive_group()
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define_g.add_argument("--define", action="store_true",
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help=_("Force defining the domain. Only required if a --print "
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"option was specified."))
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define_g.add_argument("--no-define", dest='define', action="store_false",
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help=_("Force not defining the domain."))
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define_g.set_defaults(define=None)
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outg.add_argument("--start", action="store_true",
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help=_("Start the domain."))
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outg.add_argument("--print-diff", action="store_true",
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help=_("Only print the requested change, in diff format"))
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outg.add_argument("--print-xml", action="store_true",
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help=_("Only print the requested change, in full XML format"))
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outg.add_argument("--confirm", action="store_true",
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help=_("Require confirmation before saving any results."))
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cli.add_os_variant_option(parser, virtinstall=False)
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g = parser.add_argument_group(_("XML options"))
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cli.add_disk_option(g, editexample=True)
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cli.add_net_option(g)
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cli.add_gfx_option(g)
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cli.add_metadata_option(g)
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cli.add_memory_option(g)
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cli.vcpu_cli_options(g, editexample=True)
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cli.add_guest_xml_options(g)
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cli.add_boot_options(g)
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cli.add_device_options(g)
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misc = parser.add_argument_group(_("Miscellaneous Options"))
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cli.add_misc_options(misc, prompt=False, printxml=False, dryrun=False)
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cli.autocomplete(parser)
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return parser.parse_args()
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###################
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# main() handling #
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###################
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def main(conn=None):
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cli.earlyLogging()
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options = parse_args()
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if (options.confirm or options.print_xml or
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options.print_diff or options.build_xml):
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options.quiet = False
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cli.setupLogging("virt-xml", options.debug, options.quiet)
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if options.update and options.start:
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fail(_("Either update or start a domain"))
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if cli.check_option_introspection(options):
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return 0
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options.stdinxml = None
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if not options.domain and not options.build_xml:
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if not sys.stdin.closed and not sys.stdin.isatty():
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if options.confirm:
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fail(_("Can't use --confirm with stdin input."))
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if options.update:
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fail(_("Can't use --update with stdin input."))
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options.stdinxml = sys.stdin.read()
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else:
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fail(_("A domain must be specified"))
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if not options.print_xml and not options.print_diff:
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if options.stdinxml:
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if not options.define:
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options.print_xml = True
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else:
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if options.define is None:
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options.define = True
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if options.confirm and not options.print_xml:
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options.print_diff = True
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conn = cli.getConnection(options.connect, conn)
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domain = None
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active_xmlobj = None
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inactive_xmlobj = None
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if options.domain:
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domain, inactive_xmlobj, active_xmlobj = get_domain_and_guest(
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conn, options.domain)
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elif not options.build_xml:
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inactive_xmlobj = virtinst.Guest(conn, options.stdinxml)
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check_action_collision(options)
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parserclass = check_xmlopt_collision(options)
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if options.update and not parserclass.guest_propname:
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fail(_("Don't know how to --update for --%s") %
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(parserclass.cli_arg_name))
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if options.build_xml:
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devs = action_build_xml(conn, options, parserclass)
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for dev in devs:
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# pylint: disable=no-member
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print_stdout(dev.get_xml())
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return 0
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if options.update:
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if active_xmlobj:
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devs, action = prepare_changes(active_xmlobj, options, parserclass)
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update_changes(domain, devs, action, options.confirm)
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else:
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logging.warning(
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_("The VM is not running, --update is inapplicable."))
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if options.define or options.start:
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devs, action = prepare_changes(inactive_xmlobj, options, parserclass)
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if options.define:
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dom = define_changes(conn, inactive_xmlobj,
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devs, action, options.confirm)
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if dom and options.start:
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try:
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dom.create()
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except libvirt.libvirtError as e:
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fail(_("Failed starting domain '%s': %s") % (inactive_xmlobj.name, e))
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print_stdout(_("Domain '%s' started successfully.") %
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inactive_xmlobj.name)
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elif not options.update and active_xmlobj and dom:
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print_stdout(
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_("Changes will take effect after the domain is fully powered off."))
|
|
else:
|
|
dom = start_domain_transient(conn, inactive_xmlobj, devs,
|
|
action, options.confirm)
|
|
|
|
if not options.update and not options.define and not options.start:
|
|
prepare_changes(inactive_xmlobj, options, parserclass)
|
|
|
|
return 0
|
|
|
|
|
|
if __name__ == "__main__": # pragma: no cover
|
|
try:
|
|
sys.exit(main())
|
|
except SystemExit as sys_e:
|
|
sys.exit(sys_e.code)
|
|
except KeyboardInterrupt:
|
|
logging.debug("", exc_info=True)
|
|
print_stderr(_("Aborted at user request"))
|
|
except Exception as main_e:
|
|
fail(main_e)
|