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virt-manager/virtManager/migrate.py
Cole Robinson cad809fe80 Make all dialogs clean up when vm/conn disappears 
Moves all the window cleanup handling to each class and audit for
all --test-leak-debug errors and fix
2018-03-15 21:24:48 -04:00

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Python
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#
# Copyright (C) 2009, 2013 Red Hat, Inc.
# Copyright (C) 2009 Cole Robinson <crobinso@redhat.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301 USA.
#
import logging
import traceback
from gi.repository import Gdk
from gi.repository import Gtk
from gi.repository import Pango
from virtinst import util
from . import uiutil
from .asyncjob import vmmAsyncJob
from .baseclass import vmmGObjectUI
from .connmanager import vmmConnectionManager
from .domain import vmmDomain
NUM_COLS = 3
(COL_LABEL,
COL_URI,
COL_CAN_MIGRATE) = range(NUM_COLS)
class vmmMigrateDialog(vmmGObjectUI):
@classmethod
def show_instance(cls, parentobj, vm):
try:
if not cls._instance:
cls._instance = cls()
cls._instance.show(parentobj.topwin, vm)
except Exception as e:
parentobj.err.show_err(
_("Error launching migrate dialog: %s") % str(e))
def __init__(self):
vmmGObjectUI.__init__(self, "migrate.ui", "vmm-migrate")
self.vm = None
self.builder.connect_signals({
"on_vmm_migrate_delete_event": self._delete_event,
"on_migrate_cancel_clicked": self._cancel_clicked,
"on_migrate_finish_clicked": self._finish_clicked,
"on_migrate_dest_changed": self._destconn_changed,
"on_migrate_set_address_toggled": self._set_address_toggled,
"on_migrate_set_port_toggled": self._set_port_toggled,
"on_migrate_mode_changed": self._mode_changed,
})
self.bind_escape_key_close()
self._cleanup_on_app_close()
self._init_state()
def _cleanup(self):
self.vm = None
@property
def _connobjs(self):
return vmmConnectionManager.get_instance().conns
@property
def conn(self):
return self.vm and self.vm.conn or None
##############
# Public API #
##############
def show(self, parent, vm):
logging.debug("Showing migrate wizard")
self.vm = vm
self._reset_state()
self.topwin.set_transient_for(parent)
self.topwin.present()
def close(self, ignore1=None, ignore2=None):
logging.debug("Closing migrate wizard")
self.topwin.hide()
self.vm = None
return 1
################
# Init helpers #
################
def _init_state(self):
blue = Gdk.color_parse("#0072A8")
self.widget("header").modify_bg(Gtk.StateType.NORMAL, blue)
# Connection combo
cols = [None] * NUM_COLS
cols[COL_LABEL] = str
cols[COL_URI] = str
cols[COL_CAN_MIGRATE] = bool
model = Gtk.ListStore(*cols)
combo = self.widget("migrate-dest")
combo.set_model(model)
text = uiutil.init_combo_text_column(combo, COL_LABEL)
text.set_property("ellipsize", Pango.EllipsizeMode.MIDDLE)
text.set_property("width-chars", 30)
combo.add_attribute(text, 'sensitive', COL_CAN_MIGRATE)
model.set_sort_column_id(COL_LABEL, Gtk.SortType.ASCENDING)
def _sorter(model, iter1, iter2, ignore):
def _cmp(a, b):
return ((a > b) - (a < b))
row1 = model[iter1]
row2 = model[iter2]
if row1[COL_URI] is None:
return -1
if row2[COL_URI] is None:
return 1
return _cmp(row1[COL_LABEL], row2[COL_LABEL])
model.set_sort_func(COL_LABEL, _sorter)
# Mode combo
combo = self.widget("migrate-mode")
# label, is_tunnel
model = Gtk.ListStore(str, bool)
model.append([_("Direct"), False])
model.append([_("Tunnelled"), True])
combo.set_model(model)
uiutil.init_combo_text_column(combo, 0)
self.widget("migrate-dest").emit("changed")
self.widget("migrate-mode").set_tooltip_text(
self.widget("migrate-mode-label").get_tooltip_text())
self.widget("migrate-unsafe").set_tooltip_text(
self.widget("migrate-unsafe-label").get_tooltip_text())
self.widget("migrate-temporary").set_tooltip_text(
self.widget("migrate-temporary-label").get_tooltip_text())
def _reset_state(self):
title_str = ("<span size='large' color='white'>%s '%s'</span>" %
(_("Migrate"), util.xml_escape(self.vm.get_name())))
self.widget("header-label").set_markup(title_str)
self.widget("migrate-advanced-expander").set_expanded(False)
self.widget("migrate-cancel").grab_focus()
self.widget("config-box").set_visible(True)
hostname = self.conn.libvirt_gethostname()
srctext = "%s (%s)" % (hostname, self.conn.get_pretty_desc())
self.widget("migrate-label-name").set_text(self.vm.get_name_or_title())
self.widget("migrate-label-src").set_text(srctext)
self.widget("migrate-label-src").set_tooltip_text(self.conn.get_uri())
self.widget("migrate-set-address").set_active(True)
self.widget("migrate-set-address").emit("toggled")
self.widget("migrate-set-port").set_active(True)
self.widget("migrate-mode").set_active(0)
self.widget("migrate-unsafe").set_active(False)
self.widget("migrate-temporary").set_active(False)
if self.conn.is_xen():
# Default xen port is 8002
self.widget("migrate-port").set_value(8002)
else:
# QEMU migrate port range is 49152+64
self.widget("migrate-port").set_value(49152)
self._populate_destconn()
#############
# Listeners #
#############
def _delete_event(self, ignore1, ignore2):
self.close()
return 1
def _cancel_clicked(self, src):
ignore = src
self.close()
def _finish_clicked(self, src):
ignore = src
self._finish()
def _destconn_changed(self, src):
row = uiutil.get_list_selected_row(src)
if not row:
return
can_migrate = row and row[COL_CAN_MIGRATE] or False
uri = row[COL_URI]
tooltip = ""
if not can_migrate:
tooltip = _("A valid destination connection must be selected.")
self.widget("config-box").set_visible(can_migrate)
self.widget("migrate-finish").set_sensitive(can_migrate)
self.widget("migrate-finish").set_tooltip_text(tooltip)
address = ""
address_warning = ""
tunnel_warning = ""
tunnel_uri = ""
if can_migrate and uri in self._connobjs:
destconn = self._connobjs[uri]
tunnel_uri = destconn.get_uri()
if not destconn.is_remote():
tunnel_warning = _("A remotely accessible libvirt URI "
"is required for tunneled migration, but the "
"selected connection is a local URI. Libvirt will "
"reject this unless you add a transport.")
tunnel_warning = ("<span size='small'>%s</span>" %
tunnel_warning)
address = destconn.libvirt_gethostname()
if self._is_localhost(address):
address_warning = _("The destination's hostname is "
"'localhost', which will be rejected by libvirt. "
"You must configure the destination to have a valid "
"publicly accessible hostname.")
address_warning = ("<span size='small'>%s</span>" %
address_warning)
self.widget("migrate-address").set_text(address)
uiutil.set_grid_row_visible(
self.widget("migrate-address-warning-box"), bool(address_warning))
self.widget("migrate-address-warning-label").set_markup(address_warning)
self.widget("migrate-tunnel-uri").set_text(tunnel_uri)
uiutil.set_grid_row_visible(
self.widget("migrate-tunnel-warning-box"), bool(tunnel_warning))
self.widget("migrate-tunnel-warning-label").set_markup(tunnel_warning)
def _set_address_toggled(self, src):
enable = src.get_active()
self.widget("migrate-address").set_visible(enable)
self.widget("migrate-address-label").set_visible(not enable)
port_enable = self.widget("migrate-set-port").get_active()
self.widget("migrate-set-port").set_active(enable and port_enable)
self.widget("migrate-set-port").emit("toggled")
def _set_port_toggled(self, src):
enable = src.get_active()
self.widget("migrate-port").set_visible(enable)
self.widget("migrate-port-label").set_visible(not enable)
def _is_tunnel_selected(self):
return uiutil.get_list_selection(self.widget("migrate-mode"), column=1)
def _mode_changed(self, src):
ignore = src
is_tunnel = self._is_tunnel_selected()
self.widget("migrate-direct-box").set_visible(not is_tunnel)
self.widget("migrate-tunnel-box").set_visible(is_tunnel)
###########################
# destconn combo handling #
###########################
def _is_localhost(self, addr):
return not addr or addr.startswith("localhost")
def _build_dest_row(self, destconn):
driver = self.conn.get_driver()
origuri = self.conn.get_uri()
can_migrate = False
desc = destconn.get_pretty_desc()
reason = ""
desturi = destconn.get_uri()
if destconn.get_driver() != driver:
reason = _("Hypervisors do not match")
elif destconn.is_disconnected():
reason = _("Disconnected")
elif destconn.get_uri() == origuri:
reason = _("Same connection")
elif destconn.is_active():
can_migrate = True
if reason:
desc = "%s (%s)" % (desc, reason)
return [desc, desturi, can_migrate]
def _populate_destconn(self):
combo = self.widget("migrate-dest")
model = combo.get_model()
model.clear()
rows = []
for conn in list(self._connobjs.values()):
rows.append(self._build_dest_row(conn))
if not any([row[COL_CAN_MIGRATE] for row in rows]):
rows.insert(0,
[_("No usable connections available."), None, False])
for row in rows:
model.append(row)
combo.set_active(0)
for idx, row in enumerate(model):
if row[COL_CAN_MIGRATE]:
combo.set_active(idx)
break
####################
# migrate handling #
####################
def _build_regular_migrate_uri(self):
address = None
if self.widget("migrate-address").get_visible():
address = self.widget("migrate-address").get_text()
port = None
if self.widget("migrate-port").get_visible():
port = int(self.widget("migrate-port").get_value())
if not address:
return
if self.conn.is_xen():
uri = "%s" % address
else:
uri = "tcp:%s" % address
if port:
uri += ":%s" % port
return uri
def _finish_cb(self, error, details, destconn):
self.reset_finish_cursor()
if error:
error = _("Unable to migrate guest: %s") % error
self.err.show_err(error, details=details)
else:
destconn.schedule_priority_tick(pollvm=True)
self.conn.schedule_priority_tick(pollvm=True)
self.close()
def _finish(self):
try:
row = uiutil.get_list_selected_row(self.widget("migrate-dest"))
destlabel = row[COL_LABEL]
destconn = self._connobjs.get(row[COL_URI])
tunnel = self._is_tunnel_selected()
unsafe = self.widget("migrate-unsafe").get_active()
temporary = self.widget("migrate-temporary").get_active()
if tunnel:
uri = self.widget("migrate-tunnel-uri").get_text()
else:
uri = self._build_regular_migrate_uri()
except Exception as e:
details = "".join(traceback.format_exc())
self.err.show_err((_("Uncaught error validating input: %s") %
str(e)),
details=details)
return
self.set_finish_cursor()
cancel_cb = None
if self.vm.getjobinfo_supported:
cancel_cb = (self._cancel_migration, self.vm)
if uri:
destlabel += " " + uri
progWin = vmmAsyncJob(
self._async_migrate,
[self.vm, destconn, uri, tunnel, unsafe, temporary],
self._finish_cb, [destconn],
_("Migrating VM '%s'") % self.vm.get_name(),
(_("Migrating VM '%s' to %s. This may take a while.") %
(self.vm.get_name(), destlabel)),
self.topwin, cancel_cb=cancel_cb)
progWin.run()
def _cancel_migration(self, asyncjob, vm):
logging.debug("Cancelling migrate job")
if not vm:
return
try:
vm.abort_job()
except Exception as e:
logging.exception("Error cancelling migrate job")
asyncjob.show_warning(_("Error cancelling migrate job: %s") % e)
return
asyncjob.job_canceled = True
return
def _async_migrate(self, asyncjob,
origvm, origdconn, migrate_uri, tunnel, unsafe, temporary):
meter = asyncjob.get_meter()
srcconn = origvm.conn
dstconn = origdconn
vminst = srcconn.get_backend().lookupByName(origvm.get_name())
vm = vmmDomain(srcconn, vminst, vminst.UUID())
logging.debug("Migrating vm=%s from %s to %s", vm.get_name(),
srcconn.get_uri(), dstconn.get_uri())
vm.migrate(dstconn, migrate_uri, tunnel, unsafe, temporary,
meter=meter)
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