561 lines
19 KiB
Python
561 lines
19 KiB
Python
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# Copyright (C) 2006, 2013-2014 Red Hat, Inc.
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# Copyright (C) 2006 Daniel P. Berrange <berrange@redhat.com>
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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 queue
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import threading
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import time
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from gi.repository import Gio
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from gi.repository import GLib
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from gi.repository import Gtk
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from virtinst import log
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from .baseclass import vmmGObject
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from .createconn import vmmCreateConn
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from .connmanager import vmmConnectionManager
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from .lib.inspection import vmmInspection
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from .systray import vmmSystray
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(PRIO_HIGH,
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PRIO_LOW) = range(1, 3)
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def _show_startup_error(fn):
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"""
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Decorator to show a modal error dialog if an exception is raised
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from a startup routine
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"""
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# pylint: disable=protected-access
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def newfn(self, *args, **kwargs):
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try:
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return fn(self, *args, **kwargs)
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except Exception as e:
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modal = self._can_exit()
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self.err.show_err(str(e), modal=modal)
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self._exit_app_if_no_windows()
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return newfn
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class vmmEngine(vmmGObject):
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CLI_SHOW_MANAGER = "manager"
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CLI_SHOW_DOMAIN_CREATOR = "creator"
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CLI_SHOW_DOMAIN_EDITOR = "editor"
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CLI_SHOW_DOMAIN_PERFORMANCE = "performance"
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CLI_SHOW_DOMAIN_CONSOLE = "console"
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CLI_SHOW_DOMAIN_DELETE = "delete"
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CLI_SHOW_HOST_SUMMARY = "summary"
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@classmethod
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def get_instance(cls):
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if not cls._instance:
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cls._instance = vmmEngine()
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return cls._instance
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__gsignals__ = {
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"app-closing": (vmmGObject.RUN_FIRST, None, []),
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}
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def __init__(self):
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vmmGObject.__init__(self)
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self._exiting = False
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self._window_count = 0
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self._gtkapplication = None
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self._init_gtk_application()
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self._timer = None
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self._tick_counter = 0
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self._tick_thread_slow = False
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self._tick_thread = threading.Thread(name="Tick thread",
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target=self._handle_tick_queue,
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args=())
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self._tick_thread.daemon = True
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self._tick_queue = queue.PriorityQueue(100)
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@property
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def _connobjs(self):
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return vmmConnectionManager.get_instance().conns
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def _cleanup(self):
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if self._timer is not None:
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GLib.source_remove(self._timer)
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#################
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# init handling #
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#################
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def _default_startup(self, skip_autostart, cliuri):
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"""
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Actual startup routines if we are running a new instance of the app
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"""
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vmmSystray.get_instance()
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vmmInspection.get_instance()
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self.add_gsettings_handle(
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self.config.on_stats_update_interval_changed(
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self._timer_changed_cb))
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self._schedule_timer()
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self._tick_thread.start()
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self._tick()
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uris = list(self._connobjs.keys())
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if not uris:
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log.debug("No stored URIs found.")
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else:
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log.debug("Loading stored URIs:\n%s",
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" \n".join(sorted(uris)))
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if not skip_autostart:
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self.idle_add(self._autostart_conns)
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if not self.config.get_conn_uris() and not cliuri:
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# Only add default if no connections are currently known
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manager = self._get_manager()
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manager.set_startup_error(
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_("Checking for virtualization packages..."))
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self.timeout_add(1000, self._add_default_conn)
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def _add_default_conn(self):
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"""
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If there's no cached connections, or any requested on the command
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line, try to determine a default URI and open it, first checking
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if libvirt is running
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"""
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manager = self._get_manager()
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log.debug("Trying to start libvirtd through systemd")
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unitname = "libvirtd.service"
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libvirtd_installed = False
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libvirtd_active = False
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unitpath = None
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# Fetch all units from systemd
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try:
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bus = Gio.bus_get_sync(Gio.BusType.SYSTEM, None)
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systemd = Gio.DBusProxy.new_sync(bus, 0, None,
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"org.freedesktop.systemd1",
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"/org/freedesktop/systemd1",
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"org.freedesktop.systemd1.Manager", None)
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units = systemd.ListUnits()
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log.debug("Successfully listed units via systemd")
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except Exception:
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units = []
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log.exception("Couldn't connect to systemd")
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libvirtd_installed = os.path.exists("/var/run/libvirt")
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libvirtd_active = os.path.exists("/var/run/libvirt/libvirt-sock")
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# Check if libvirtd is installed and running
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for unitinfo in units:
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if unitinfo[0] != unitname:
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continue
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libvirtd_installed = True
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libvirtd_active = unitinfo[3] == "active"
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unitpath = unitinfo[6]
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break
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log.debug("libvirtd_installed=%s libvirtd_active=%s unitpath=%s",
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libvirtd_installed, libvirtd_active, unitpath)
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# If it's not running, try to start it
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try:
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if unitpath and libvirtd_installed and not libvirtd_active:
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unit = Gio.DBusProxy.new_sync(
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bus, 0, None,
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"org.freedesktop.systemd1", unitpath,
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"org.freedesktop.systemd1.Unit", None)
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if not self.config.CLITestOptions.first_run:
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unit.Start("(s)", "fail")
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time.sleep(2)
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libvirtd_active = True
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except Exception:
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log.exception("Error starting libvirtd")
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if self.config.CLITestOptions.first_run:
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log.debug("--test-first-run, using uri=None to trigger error")
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tryuri = None
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else:
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tryuri = vmmCreateConn.default_uri()
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log.debug("Probed default URI=%s", tryuri)
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# Manager fail message
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msg = ""
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if not libvirtd_installed:
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msg += _("The libvirtd service does not appear to be installed. "
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"Install and run the libvirtd service to manage "
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"virtualization on this host.")
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elif not libvirtd_active:
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msg += _("libvirtd is installed but not running. Start the "
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"libvirtd service to manage virtualization on this host.")
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if not tryuri or "qemu" not in tryuri:
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if msg:
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msg += "\n\n"
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msg += _("Could not detect a default hypervisor. Make "
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"sure the appropriate qemu/kvm virtualization "
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"packages are installed to manage virtualization "
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"on this host.")
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if msg:
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msg += "\n\n"
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msg += _("A virtualization connection can be manually "
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"added via File->Add Connection")
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if (tryuri is None or
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not libvirtd_installed or
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not libvirtd_active):
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manager.set_startup_error(msg)
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return
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# Launch idle callback to connect to default URI
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def idle_connect():
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def _open_completed(c, ConnectError):
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if ConnectError:
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self._handle_conn_error(c, ConnectError)
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conn = vmmConnectionManager.get_instance().add_conn(tryuri)
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conn.set_autoconnect(True)
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conn.connect_once("open-completed", _open_completed)
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conn.open()
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self.idle_add(idle_connect)
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def _autostart_conns(self):
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"""
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We serialize conn autostart, so polkit/ssh-askpass doesn't spam
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"""
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if self._exiting:
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return
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connections_queue = queue.Queue()
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auto_conns = [conn.get_uri() for conn in self._connobjs.values() if
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conn.get_autoconnect()]
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def add_next_to_queue():
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if not auto_conns:
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connections_queue.put(None)
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else:
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connections_queue.put(auto_conns.pop(0))
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def conn_open_completed(_conn, ConnectError):
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# Explicitly ignore connection errors, we've done that
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# for a while and it can be noisy
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if ConnectError is not None:
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log.debug("Autostart connection error: %s",
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ConnectError.details)
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add_next_to_queue()
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def handle_queue():
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while True:
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uri = connections_queue.get()
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if uri is None:
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return
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if self._exiting:
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return
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if uri not in self._connobjs:
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add_next_to_queue()
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continue
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conn = self._connobjs[uri]
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conn.connect_once("open-completed", conn_open_completed)
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self.idle_add(conn.open)
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add_next_to_queue()
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self._start_thread(handle_queue, "Conn autostart thread")
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############################
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# Gtk Application handling #
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############################
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def _on_gtk_application_activated(self, ignore):
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"""
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Invoked after application.run()
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"""
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if not self._application.get_windows():
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log.debug("Initial gtkapplication activated")
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self._application.add_window(Gtk.Window())
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def _init_gtk_application(self):
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self._application = Gtk.Application(
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application_id="org.virt-manager.virt-manager", flags=0)
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self._application.register(None)
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self._application.connect("activate",
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self._on_gtk_application_activated)
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action = Gio.SimpleAction.new("cli_command",
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GLib.VariantType.new("(sss)"))
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action.connect("activate", self._handle_cli_command)
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self._application.add_action(action)
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def start(self, uri, show_window, domain, skip_autostart):
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"""
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Public entrypoint from virt-manager cli. If app is already
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running, connect to it and exit, otherwise run our functional
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default startup.
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"""
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# Dispatch dbus CLI command
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if uri and not show_window:
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show_window = self.CLI_SHOW_MANAGER
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data = GLib.Variant("(sss)",
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(uri or "", show_window or "", domain or ""))
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is_remote = self._application.get_is_remote()
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if not is_remote:
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self._default_startup(skip_autostart, uri)
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self._application.activate_action("cli_command", data)
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if is_remote:
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log.debug("Connected to remote app instance.")
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return
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self._application.run(None)
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###########################
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# timer and tick handling #
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###########################
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def _timer_changed_cb(self, *args, **kwargs):
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ignore1 = args
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ignore2 = kwargs
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self._schedule_timer()
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def _schedule_timer(self):
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interval = self.config.get_stats_update_interval() * 1000
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if self._timer is not None:
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self.remove_gobject_timeout(self._timer)
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self._timer = None
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self._timer = self.timeout_add(interval, self._tick)
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def _add_obj_to_tick_queue(self, obj, isprio, **kwargs):
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if self._tick_queue.full():
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if not self._tick_thread_slow:
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log.debug("Tick is slow, not running at requested rate.")
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self._tick_thread_slow = True
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return
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self._tick_counter += 1
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self._tick_queue.put((isprio and PRIO_HIGH or PRIO_LOW,
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self._tick_counter,
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obj, kwargs))
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def schedule_priority_tick(self, conn, kwargs):
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# Called directly from connection
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self._add_obj_to_tick_queue(conn, True, **kwargs)
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def _tick(self):
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for conn in self._connobjs.values():
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self._add_obj_to_tick_queue(conn, False,
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stats_update=True, pollvm=True)
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return 1
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def _handle_tick_queue(self):
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while True:
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ignore1, ignore2, conn, kwargs = self._tick_queue.get()
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try:
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conn.tick_from_engine(**kwargs)
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except Exception:
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# Don't attempt to show any UI error here, since it
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# can cause dialogs to appear from nowhere if say
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# libvirtd is shut down
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log.debug("Error polling connection %s",
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conn.get_uri(), exc_info=True)
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# Need to clear reference to make leak check happy
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conn = None
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self._tick_queue.task_done()
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return 1
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#####################################
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# window counting and exit handling #
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#####################################
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def increment_window_counter(self):
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"""
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Public function, called by toplevel windows
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"""
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self._window_count += 1
|
||
|
|
log.debug("window counter incremented to %s", self._window_count)
|
||
|
|
|
||
|
|
def decrement_window_counter(self):
|
||
|
|
"""
|
||
|
|
Public function, called by toplevel windows
|
||
|
|
"""
|
||
|
|
self._window_count -= 1
|
||
|
|
log.debug("window counter decremented to %s", self._window_count)
|
||
|
|
|
||
|
|
self._exit_app_if_no_windows()
|
||
|
|
|
||
|
|
def _systray_is_embedded(self):
|
||
|
|
"""
|
||
|
|
We don't use window tracking here: systray isn't a window and even
|
||
|
|
when 'show' has been requested it may not be embedded in a visible
|
||
|
|
tray area, so we have to check it separately.
|
||
|
|
"""
|
||
|
|
return vmmSystray.get_instance().is_embedded()
|
||
|
|
|
||
|
|
def _can_exit(self):
|
||
|
|
return (self._window_count <= 0 and not
|
||
|
|
self._systray_is_embedded())
|
||
|
|
|
||
|
|
def _exit_app_if_no_windows(self):
|
||
|
|
if self._exiting:
|
||
|
|
return
|
||
|
|
if self._can_exit():
|
||
|
|
log.debug("No windows found, requesting app exit")
|
||
|
|
self.exit_app()
|
||
|
|
|
||
|
|
def exit_app(self):
|
||
|
|
"""
|
||
|
|
Public call, manager/details/... use this to force exit the app
|
||
|
|
"""
|
||
|
|
if self._exiting:
|
||
|
|
return
|
||
|
|
|
||
|
|
self._exiting = True
|
||
|
|
|
||
|
|
def _do_exit():
|
||
|
|
try:
|
||
|
|
vmmConnectionManager.get_instance().cleanup()
|
||
|
|
self.emit("app-closing")
|
||
|
|
self.cleanup()
|
||
|
|
|
||
|
|
if self.config.CLITestOptions.leak_debug:
|
||
|
|
objs = self.config.get_objects()
|
||
|
|
# Engine will always appear to leak
|
||
|
|
objs.remove(self.object_key)
|
||
|
|
|
||
|
|
for name in objs:
|
||
|
|
log.debug("LEAK: %s", name)
|
||
|
|
|
||
|
|
log.debug("Exiting app normally.")
|
||
|
|
finally:
|
||
|
|
self._application.quit()
|
||
|
|
|
||
|
|
# We stick this in an idle callback, so the exit_app() caller
|
||
|
|
# reference is dropped, and leak check debug doesn't give a
|
||
|
|
# false positive
|
||
|
|
self.idle_add(_do_exit)
|
||
|
|
|
||
|
|
|
||
|
|
##########################################
|
||
|
|
# Window launchers from virt-manager cli #
|
||
|
|
##########################################
|
||
|
|
|
||
|
|
def _find_vm_by_cli_str(self, uri, clistr):
|
||
|
|
"""
|
||
|
|
Lookup a VM by a string passed in on the CLI. Can be either
|
||
|
|
ID, domain name, or UUID
|
||
|
|
"""
|
||
|
|
if clistr.isdigit():
|
||
|
|
clistr = int(clistr)
|
||
|
|
|
||
|
|
for vm in self._connobjs[uri].list_vms():
|
||
|
|
if clistr == vm.get_id():
|
||
|
|
return vm
|
||
|
|
elif clistr == vm.get_name():
|
||
|
|
return vm
|
||
|
|
elif clistr == vm.get_uuid():
|
||
|
|
return vm
|
||
|
|
|
||
|
|
def _cli_show_vm_helper(self, uri, clistr, page):
|
||
|
|
vm = self._find_vm_by_cli_str(uri, clistr)
|
||
|
|
if not vm:
|
||
|
|
raise RuntimeError("%s does not have VM '%s'" %
|
||
|
|
(uri, clistr))
|
||
|
|
|
||
|
|
from .vmwindow import vmmVMWindow
|
||
|
|
details = vmmVMWindow.get_instance(None, vm)
|
||
|
|
|
||
|
|
if page == self.CLI_SHOW_DOMAIN_PERFORMANCE:
|
||
|
|
details.activate_performance_page()
|
||
|
|
elif (page in [self.CLI_SHOW_DOMAIN_EDITOR,
|
||
|
|
self.CLI_SHOW_DOMAIN_DELETE]):
|
||
|
|
details.activate_config_page()
|
||
|
|
elif page == self.CLI_SHOW_DOMAIN_CONSOLE:
|
||
|
|
details.activate_console_page()
|
||
|
|
|
||
|
|
details.show()
|
||
|
|
|
||
|
|
if page == self.CLI_SHOW_DOMAIN_DELETE:
|
||
|
|
from .delete import vmmDeleteDialog
|
||
|
|
vmmDeleteDialog.show_instance(details, vm)
|
||
|
|
|
||
|
|
def _get_manager(self):
|
||
|
|
from .manager import vmmManager
|
||
|
|
return vmmManager.get_instance(None)
|
||
|
|
|
||
|
|
@_show_startup_error
|
||
|
|
def _launch_cli_window(self, uri, show_window, clistr):
|
||
|
|
log.debug("Launching requested window '%s'", show_window)
|
||
|
|
if show_window == self.CLI_SHOW_MANAGER:
|
||
|
|
manager = self._get_manager()
|
||
|
|
manager.set_initial_selection(uri)
|
||
|
|
manager.show()
|
||
|
|
elif show_window == self.CLI_SHOW_DOMAIN_CREATOR:
|
||
|
|
from .createvm import vmmCreateVM
|
||
|
|
vmmCreateVM.show_instance(None, uri)
|
||
|
|
elif show_window == self.CLI_SHOW_HOST_SUMMARY:
|
||
|
|
from .host import vmmHost
|
||
|
|
vmmHost.show_instance(None, self._connobjs[uri])
|
||
|
|
elif (show_window in [self.CLI_SHOW_DOMAIN_EDITOR,
|
||
|
|
self.CLI_SHOW_DOMAIN_PERFORMANCE,
|
||
|
|
self.CLI_SHOW_DOMAIN_CONSOLE,
|
||
|
|
self.CLI_SHOW_DOMAIN_DELETE]):
|
||
|
|
self._cli_show_vm_helper(uri, clistr, show_window)
|
||
|
|
else:
|
||
|
|
raise RuntimeError("Unknown cli window command '%s'" %
|
||
|
|
show_window)
|
||
|
|
|
||
|
|
def _handle_conn_error(self, _conn, ConnectError):
|
||
|
|
msg, details, title = ConnectError
|
||
|
|
modal = self._can_exit()
|
||
|
|
self.err.show_err(msg, details, title, modal=modal)
|
||
|
|
self._exit_app_if_no_windows()
|
||
|
|
|
||
|
|
@_show_startup_error
|
||
|
|
def _handle_cli_command(self, actionobj, variant):
|
||
|
|
ignore = actionobj
|
||
|
|
uri = variant[0]
|
||
|
|
show_window = variant[1] or self.CLI_SHOW_MANAGER
|
||
|
|
domain = variant[2]
|
||
|
|
|
||
|
|
log.debug("processing cli command uri=%s show_window=%s domain=%s",
|
||
|
|
uri, show_window, domain)
|
||
|
|
if not uri:
|
||
|
|
log.debug("No cli action requested, launching default window")
|
||
|
|
self._get_manager().show()
|
||
|
|
return
|
||
|
|
|
||
|
|
conn_is_new = uri not in self._connobjs
|
||
|
|
conn = vmmConnectionManager.get_instance().add_conn(uri)
|
||
|
|
if conn.is_active():
|
||
|
|
self.idle_add(self._launch_cli_window,
|
||
|
|
uri, show_window, domain)
|
||
|
|
return
|
||
|
|
|
||
|
|
def _open_completed(_c, ConnectError):
|
||
|
|
if ConnectError:
|
||
|
|
if conn_is_new:
|
||
|
|
log.debug("Removing failed uri=%s", uri)
|
||
|
|
vmmConnectionManager.get_instance().remove_conn(uri)
|
||
|
|
self._handle_conn_error(conn, ConnectError)
|
||
|
|
else:
|
||
|
|
self._launch_cli_window(uri, show_window, domain)
|
||
|
|
|
||
|
|
conn.connect_once("open-completed", _open_completed)
|
||
|
|
conn.open()
|