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virt-manager/virtManager/connection.py
Cole Robinson bea5e56c26 virtinst: connection: Add is_privileged 
Replace the is_session and is_system distinction with variants
of is_privileged. This matches what libvirt uses internally, and
will help with supporting qemu:///embed at some point

Signed-off-by: Cole Robinson <crobinso@redhat.com>
2020-02-03 07:05:11 -05:00

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# Copyright (C) 2006, 2013, 2014, 2015 Red Hat, Inc.
# Copyright (C) 2006 Daniel P. Berrange <berrange@redhat.com>
#
# This work is licensed under the GNU GPLv2 or later.
# See the COPYING file in the top-level directory.
import os
import threading
import time
import traceback
import libvirt
import virtinst
from virtinst import log
from virtinst import pollhelpers
from .lib import connectauth
from .baseclass import vmmGObject
from .lib.libvirtenummap import LibvirtEnumMap
from .object.domain import vmmDomain
from .object.network import vmmNetwork
from .object.nodedev import vmmNodeDevice
from .object.storagepool import vmmStoragePool
from .lib.statsmanager import vmmStatsManager
class _ObjectList(vmmGObject):
"""
Class that wraps our internal list of libvirt objects
"""
# pylint: disable=not-context-manager
# pylint doesn't know that lock() has 'with' support
BLACKLIST_COUNT = 3
def __init__(self):
vmmGObject.__init__(self)
self._objects = []
self._blacklist = {}
self._lock = threading.Lock()
def _cleanup(self):
self._objects = []
def _blacklist_key(self, obj):
return str(obj.__class__) + obj.get_connkey()
def add_blacklist(self, obj):
"""
Add an object to the blacklist. Basically a list of objects we
choose not to poll, because they threw an error at init time
:param obj: vmmLibvirtObject to blacklist
:returns: number of added object to list
"""
key = self._blacklist_key(obj)
if self.in_blacklist(obj):
self._blacklist[key] += 1
self._blacklist[key] = 1
return self._blacklist[key]
def remove_blacklist(self, obj):
"""
:param obj: vmmLibvirtObject to remove from blacklist
:returns: True if object was blacklisted or False otherwise.
"""
return bool(self._blacklist.pop(self._blacklist_key(obj), 0))
def in_blacklist(self, obj):
"""
If an object is in list only once don't consider it blacklisted,
give it one more chance.
:param obj: vmmLibvirtObject to check
:returns: True if object is blacklisted
"""
return self._blacklist.get(self._blacklist_key(obj), 0) > _ObjectList.BLACKLIST_COUNT
def remove(self, obj):
"""
Remove an object from the list.
:param obj: vmmLibvirtObject to remove
:returns: True if object removed, False if object was not found
"""
with self._lock:
# Identity check is sufficient here, since we should never be
# asked to remove an object that wasn't at one point in the list.
if obj not in self._objects:
return self.remove_blacklist(obj)
self._objects.remove(obj)
return True
def add(self, obj):
"""
Add an object to the list.
:param obj: vmmLibvirtObject to add
:returns: True if object added, False if object already in the list
"""
with self._lock:
# We don't look up based on identity here, to prevent tick()
# races from adding the same domain twice
#
# We don't use lookup_object here since we need to hold the
# lock the whole time to prevent a 'time of check' issue
for checkobj in self._objects:
if (checkobj.__class__ == obj.__class__ and
checkobj.get_connkey() == obj.get_connkey()):
return False
if obj in self._objects:
return False
self._objects.append(obj)
return True
def get_objects_for_class(self, classobj):
"""
Return all objects over the passed vmmLibvirtObject class
"""
with self._lock:
return [o for o in self._objects if o.__class__ is classobj]
def lookup_object(self, classobj, connkey):
"""
Lookup an object with the passed classobj + connkey
"""
# Doesn't require locking, since get_objects_for_class covers us
for obj in self.get_objects_for_class(classobj):
if obj.get_connkey() == connkey:
return obj
return None
def all_objects(self):
with self._lock:
return self._objects[:]
class vmmConnection(vmmGObject):
__gsignals__ = {
"vm-added": (vmmGObject.RUN_FIRST, None, [str]),
"vm-removed": (vmmGObject.RUN_FIRST, None, [str]),
"vm-renamed": (vmmGObject.RUN_FIRST, None, [str, str]),
"net-added": (vmmGObject.RUN_FIRST, None, [str]),
"net-removed": (vmmGObject.RUN_FIRST, None, [str]),
"pool-added": (vmmGObject.RUN_FIRST, None, [str]),
"pool-removed": (vmmGObject.RUN_FIRST, None, [str]),
"nodedev-added": (vmmGObject.RUN_FIRST, None, [str]),
"nodedev-removed": (vmmGObject.RUN_FIRST, None, [str]),
"resources-sampled": (vmmGObject.RUN_FIRST, None, []),
"state-changed": (vmmGObject.RUN_FIRST, None, []),
"open-completed": (vmmGObject.RUN_FIRST, None, [object]),
}
(_STATE_DISCONNECTED,
_STATE_CONNECTING,
_STATE_ACTIVE) = range(1, 4)
def __init__(self, uri):
self._uri = uri
if self._uri is None or self._uri.lower() == "xen":
self._uri = "xen:///"
vmmGObject.__init__(self)
self._state = self._STATE_DISCONNECTED
self._backend = virtinst.VirtinstConnection(self._uri)
self._closing = False
# Error strings are stored here if open() fails
self.connect_error = None
self._init_object_count = None
self._init_object_event = None
self.using_domain_events = False
self._domain_cb_ids = []
self.using_network_events = False
self._network_cb_ids = []
self.using_storage_pool_events = False
self._storage_pool_cb_ids = []
self.using_node_device_events = False
self._node_device_cb_ids = []
self._xml_flags = {}
self._objects = _ObjectList()
self.statsmanager = vmmStatsManager()
self._stats = []
self._hostinfo = None
self.add_gsettings_handle(
self._on_config_pretty_name_changed(
self._config_pretty_name_changed_cb))
self._init_virtconn()
@staticmethod
def pretty_hv(gtype, domtype):
"""
Convert XML <domain type='foo'> and <os><type>bar</type>
into a more human relevant string.
"""
gtype = gtype.lower()
domtype = domtype.lower()
label = domtype
if domtype == "xen":
if gtype == "xen":
label = "xen (paravirt)"
elif gtype == "hvm":
label = "xen (fullvirt)"
elif domtype == "test":
if gtype == "xen":
label = "test (xen)"
elif gtype == "hvm":
label = "test (hvm)"
elif domtype == "qemu":
label = "QEMU TCG"
elif domtype == "kvm":
label = "KVM"
return label
def __repr__(self):
return "<%s uri=%s id=%s>" % (
self.__class__.__name__, self.get_uri(), hex(id(self)))
#################
# Init routines #
#################
def _wait_for_condition(self, compare_cb, timeout=3):
"""
Wait for this object to emit the specified signal. Will not
block the mainloop.
"""
from gi.repository import Gtk
is_main_thread = (threading.current_thread().name == "MainThread")
start_time = time.time()
while True:
cur_time = time.time()
if compare_cb():
return
if (cur_time - start_time) >= timeout:
return
if is_main_thread:
if Gtk.events_pending():
Gtk.main_iteration_do(False)
continue
time.sleep(.1)
def _init_virtconn(self):
self._backend.cb_fetch_all_domains = (
lambda: [obj.get_xmlobj(refresh_if_nec=False)
for obj in self.list_vms()])
self._backend.cb_fetch_all_pools = (
lambda: [obj.get_xmlobj(refresh_if_nec=False)
for obj in self.list_pools()])
self._backend.cb_fetch_all_nodedevs = (
lambda: [obj.get_xmlobj(refresh_if_nec=False)
for obj in self.list_nodedevs()])
def fetch_all_vols():
ret = []
for pool in self.list_pools():
for vol in pool.get_volumes():
try:
ret.append(vol.get_xmlobj(refresh_if_nec=False))
except Exception as e:
log.debug("Fetching volume XML failed: %s", e)
return ret
self._backend.cb_fetch_all_vols = fetch_all_vols
def cache_new_pool(obj):
if not self.is_active():
return
name = obj.name()
self.schedule_priority_tick(pollpool=True)
def compare_cb():
return bool(self.get_pool(name))
self._wait_for_condition(compare_cb)
self._backend.cb_cache_new_pool = cache_new_pool
########################
# General data getters #
########################
def get_uri(self):
return self._uri
def get_backend(self):
return self._backend
def invalidate_caps(self):
return self._backend.invalidate_caps()
caps = property(lambda self: getattr(self, "_backend").caps)
def host_memory_size(self):
if not self._backend.is_open() or self._hostinfo is None:
return 0
return self._hostinfo[1] * 1024
def host_active_processor_count(self):
if not self._backend.is_open() or self._hostinfo is None:
return 0
return self._hostinfo[2]
##########################
# URI + hostname helpers #
##########################
def libvirt_gethostname(self):
return self._backend.getHostname()
get_uri_hostname = property(lambda s:
getattr(s, "_backend").get_uri_hostname)
get_uri_username = property(lambda s:
getattr(s, "_backend").get_uri_username)
get_uri_transport = property(lambda s:
getattr(s, "_backend").get_uri_transport)
get_uri_port = property(lambda s: getattr(s, "_backend").get_uri_port)
get_driver = property(lambda s: getattr(s, "_backend").get_uri_driver)
is_container = property(lambda s: getattr(s, "_backend").is_container)
is_lxc = property(lambda s: getattr(s, "_backend").is_lxc)
is_openvz = property(lambda s: getattr(s, "_backend").is_openvz)
is_vz = property(lambda s: getattr(s, "_backend").is_vz)
is_xen = property(lambda s: getattr(s, "_backend").is_xen)
is_remote = property(lambda s: getattr(s, "_backend").is_remote)
is_qemu = property(lambda s: getattr(s, "_backend").is_qemu)
is_qemu_privileged = property(lambda s: getattr(s, "_backend").is_qemu_privileged)
is_qemu_unprivileged = property(lambda s:
getattr(s, "_backend").is_qemu_unprivileged)
is_test = property(lambda s: getattr(s, "_backend").is_test)
is_unprivileged = property(lambda s: getattr(s, "_backend").is_unprivileged)
def get_cache_dir(self):
uri = self.get_uri().replace("/", "_")
ret = os.path.join(self._backend.get_app_cache_dir(), uri)
if not os.path.exists(ret):
os.makedirs(ret, 0o755)
return ret
def get_default_storage_format(self):
raw = self.config.get_default_storage_format(raw=True)
if raw != "default":
return raw
fmt = self.config.get_default_storage_format()
if fmt != "qcow2":
return fmt
if self.support.conn_default_qcow2():
return fmt
return None
####################################
# Connection pretty print routines #
####################################
def get_pretty_desc(self):
"""
Return a pretty label for use in the manager view, and various
connection lists.
"""
if self._get_config_pretty_name():
return self._get_config_pretty_name()
pretty_map = {
"esx": "ESX",
"gsx": "GSX",
"libxl": "libxl",
"lxc": "LXC",
"openvz": "OpenVZ",
"phyp": "phyp",
"qemu": "QEMU/KVM",
"test": "test",
"uml": "UML",
"vbox": "VBox",
"vmware": "VMWare",
"xen": "Xen",
"xenapi": "XenAPI",
}
hv = pretty_map.get(self.get_driver(), self.get_driver())
hostname = self.get_uri_hostname()
path = self.get_backend().get_uri_path()
ret = hv
if path == "/session":
ret += " " + _("User session")
elif path == "/embed":
ret += " " + _("Embedded session")
elif (path and path != "/system" and os.path.basename(path)):
# Used by test URIs to report what XML file they are using
ret += " %s" % os.path.basename(path)
if hostname:
ret += ": %s" % hostname
return ret
#######################
# API support helpers #
#######################
@property
def support(self):
return self._backend.support
def _get_flags_helper(self, obj, key, check_func):
ignore = obj
flags_dict = self._xml_flags.get(key)
if flags_dict is None:
# Flags already set
inact, act = check_func()
flags_dict = {}
flags_dict["active"] = act
flags_dict["inactive"] = inact
self._xml_flags[key] = flags_dict
active_flags = flags_dict["active"]
inactive_flags = flags_dict["inactive"]
return (inactive_flags, active_flags)
def get_dom_flags(self, vm):
key = "domain"
def check_func():
act = 0
inact = 0
if self.support.domain_xml_inactive(vm):
inact = libvirt.VIR_DOMAIN_XML_INACTIVE
else:
log.debug("Domain XML inactive flag not supported.")
if self.support.domain_xml_secure(vm):
inact |= libvirt.VIR_DOMAIN_XML_SECURE
act = libvirt.VIR_DOMAIN_XML_SECURE
else:
log.debug("Domain XML secure flag not supported.")
return inact, act
return self._get_flags_helper(vm, key, check_func)
def get_default_pool(self):
poolxml = virtinst.StoragePool.lookup_default_pool(self.get_backend())
if poolxml:
for p in self.list_pools():
if p.get_name() == poolxml.name:
return p
return None
def get_vol_by_path(self, path):
for pool in self.list_pools():
for vol in pool.get_volumes():
try:
if vol.get_target_path() == path:
return vol
except Exception as e:
# Errors can happen if the volume disappeared, bug 1092739
log.debug("Error looking up volume from path=%s: %s",
path, e)
return None
###################################
# Connection state getter/setters #
###################################
def _change_state(self, newstate):
if self._state != newstate:
self._state = newstate
log.debug("conn=%s changed to state=%s",
self.get_uri(), self.get_state_text())
self.emit("state-changed")
def is_active(self):
return self._state == self._STATE_ACTIVE
def is_disconnected(self):
return self._state == self._STATE_DISCONNECTED
def is_connecting(self):
return self._state == self._STATE_CONNECTING
def get_state_text(self):
if self.is_disconnected():
return _("Disconnected")
elif self.is_connecting():
return _("Connecting")
elif self.is_active():
return _("Active")
else:
return _("Unknown")
#################################
# Libvirt object lookup methods #
#################################
def get_vm(self, connkey):
return self._objects.lookup_object(vmmDomain, connkey)
def list_vms(self):
return self._objects.get_objects_for_class(vmmDomain)
def get_net(self, connkey):
return self._objects.lookup_object(vmmNetwork, connkey)
def list_nets(self):
return self._objects.get_objects_for_class(vmmNetwork)
def get_pool(self, connkey):
return self._objects.lookup_object(vmmStoragePool, connkey)
def list_pools(self):
return self._objects.get_objects_for_class(vmmStoragePool)
def get_nodedev(self, connkey):
return self._objects.lookup_object(vmmNodeDevice, connkey)
def list_nodedevs(self):
return self._objects.get_objects_for_class(vmmNodeDevice)
############################
# nodedev helper functions #
############################
def filter_nodedevs(self, devtype):
retdevs = []
for dev in self.list_nodedevs():
try:
xmlobj = dev.get_xmlobj()
except libvirt.libvirtError as e:
# Libvirt nodedev XML fetching can be busted
# https://bugzilla.redhat.com/show_bug.cgi?id=1225771
if e.get_error_code() != libvirt.VIR_ERR_NO_NODE_DEVICE:
log.debug("Error fetching nodedev XML", exc_info=True)
continue
if devtype and xmlobj.device_type != devtype:
continue
retdevs.append(dev)
return retdevs
###################################
# Libvirt object creation methods #
###################################
def define_domain(self, xml):
return self._backend.defineXML(xml)
def define_network(self, xml):
return self._backend.networkDefineXML(xml)
def define_pool(self, xml):
return self._backend.storagePoolDefineXML(xml, 0)
def rename_object(self, obj, origxml, newxml, oldconnkey):
if obj.is_domain():
define_cb = self.define_domain
elif obj.is_pool():
define_cb = self.define_pool
elif obj.is_network():
define_cb = self.define_network
else:
raise RuntimeError("programming error: rename_object "
"helper doesn't support object class %s" % obj.__class__)
# Undefine the original object
obj.delete(force=False)
newobj = None
try:
# Redefine new domain
newobj = define_cb(newxml)
except Exception as renameerr:
try:
log.debug("Error defining new name %s XML",
obj.class_name(), exc_info=True)
newobj = define_cb(origxml)
except Exception as fixerr:
log.debug("Failed to redefine original %s!",
obj.class_name(), exc_info=True)
raise RuntimeError(
_("%s rename failed. Attempting to recover also "
"failed.\n\n"
"Original error: %s\n\n"
"Recover error: %s" %
(obj.class_name(), str(renameerr), str(fixerr))))
raise
finally:
if newobj:
# Reinsert handle into new obj
obj.change_name_backend(newobj)
if newobj and obj.is_domain():
self.emit("vm-renamed", oldconnkey, obj.get_connkey())
#########################
# Domain event handling #
#########################
# Our strategy here isn't the most efficient: since we need to keep the
# poll helpers around for compat with old libvirt, switching to a fully
# event driven setup is hard, so we end up doing more polling than
# necessary on most events.
def _domain_xml_misc_event(self, conn, domain, *args):
# Just trigger a domain XML refresh for hotplug type events
ignore = conn
args = list(args)
eventstr = args.pop(-1)
name = domain.name()
log.debug("domain xmlmisc event: domain=%s event=%s args=%s",
name, eventstr, args)
obj = self.get_vm(name)
if not obj:
return
self.idle_add(obj.recache_from_event_loop)
def _domain_lifecycle_event(self, conn, domain, state, reason, userdata):
ignore = conn
ignore = userdata
name = domain.name()
log.debug("domain lifecycle event: domain=%s %s", name,
LibvirtEnumMap.domain_lifecycle_str(state, reason))
obj = self.get_vm(name)
if obj:
self.idle_add(obj.recache_from_event_loop)
else:
self.schedule_priority_tick(pollvm=True, force=True)
def _domain_agent_lifecycle_event(self, conn, domain, state, reason, userdata):
ignore = conn
ignore = userdata
name = domain.name()
log.debug("domain agent lifecycle event: domain=%s %s", name,
LibvirtEnumMap.domain_agent_lifecycle_str(state, reason))
obj = self.get_vm(name)
if obj:
self.idle_add(obj.recache_from_event_loop)
else:
self.schedule_priority_tick(pollvm=True, force=True)
def _network_lifecycle_event(self, conn, network, state, reason, userdata):
ignore = conn
ignore = userdata
name = network.name()
log.debug("network lifecycle event: network=%s %s",
name, LibvirtEnumMap.network_lifecycle_str(state, reason))
obj = self.get_net(name)
if obj:
self.idle_add(obj.recache_from_event_loop)
else:
self.schedule_priority_tick(pollnet=True, force=True)
def _storage_pool_lifecycle_event(self, conn, pool,
state, reason, userdata):
ignore = conn
ignore = userdata
name = pool.name()
log.debug("storage pool lifecycle event: pool=%s %s",
name, LibvirtEnumMap.storage_lifecycle_str(state, reason))
obj = self.get_pool(name)
if obj:
self.idle_add(obj.recache_from_event_loop)
else:
self.schedule_priority_tick(pollpool=True, force=True)
def _storage_pool_refresh_event(self, conn, pool, userdata):
ignore = conn
ignore = userdata
name = pool.name()
log.debug("storage pool refresh event: pool=%s", name)
obj = self.get_pool(name)
if not obj:
return
self.idle_add(obj.refresh_pool_cache_from_event_loop)
def _node_device_lifecycle_event(self, conn, dev,
state, reason, userdata):
ignore = conn
ignore = userdata
name = dev.name()
log.debug("node device lifecycle event: nodedev=%s %s",
name, LibvirtEnumMap.nodedev_lifecycle_str(state, reason))
self.schedule_priority_tick(pollnodedev=True, force=True)
def _node_device_update_event(self, conn, dev, userdata):
ignore = conn
ignore = userdata
name = dev.name()
log.debug("node device update event: nodedev=%s", name)
obj = self.get_nodedev(name)
if obj:
self.idle_add(obj.recache_from_event_loop)
def _add_conn_events(self):
if not self.support.conn_working_xen_events():
return
def _check_events_disabled():
if self.config.CLITestOptions.no_events:
raise RuntimeError("events disabled via cli")
try:
_check_events_disabled()
self._domain_cb_ids.append(
self.get_backend().domainEventRegisterAny(
None, libvirt.VIR_DOMAIN_EVENT_ID_LIFECYCLE,
self._domain_lifecycle_event, None))
self.using_domain_events = True
log.debug("Using domain events")
except Exception as e:
self.using_domain_events = False
log.debug("Error registering domain events: %s", e)
def _add_domain_xml_event(eventname, eventval, cb=None):
if not self.using_domain_events:
return
if not cb:
cb = self._domain_xml_misc_event
try:
eventid = getattr(libvirt, eventname, eventval)
self._domain_cb_ids.append(
self.get_backend().domainEventRegisterAny(
None, eventid, cb, eventname))
except Exception as e:
log.debug("Error registering %s event: %s",
eventname, e)
_add_domain_xml_event("VIR_DOMAIN_EVENT_ID_BALLOON_CHANGE", 13)
_add_domain_xml_event("VIR_DOMAIN_EVENT_ID_TRAY_CHANGE", 10)
_add_domain_xml_event("VIR_DOMAIN_EVENT_ID_DEVICE_REMOVED", 15)
_add_domain_xml_event("VIR_DOMAIN_EVENT_ID_DEVICE_ADDED", 19)
_add_domain_xml_event("VIR_DOMAIN_EVENT_ID_AGENT_LIFECYCLE", 18,
self._domain_agent_lifecycle_event)
try:
_check_events_disabled()
eventid = getattr(libvirt, "VIR_NETWORK_EVENT_ID_LIFECYCLE", 0)
self._network_cb_ids.append(
self.get_backend().networkEventRegisterAny(
None, eventid, self._network_lifecycle_event, None))
self.using_network_events = True
log.debug("Using network events")
except Exception as e:
self.using_network_events = False
log.debug("Error registering network events: %s", e)
try:
_check_events_disabled()
eventid = getattr(libvirt,
"VIR_STORAGE_POOL_EVENT_ID_LIFECYCLE", 0)
refreshid = getattr(libvirt,
"VIR_STORAGE_POOL_EVENT_ID_REFRESH", 1)
self._storage_pool_cb_ids.append(
self.get_backend().storagePoolEventRegisterAny(
None, eventid, self._storage_pool_lifecycle_event, None))
self._storage_pool_cb_ids.append(
self.get_backend().storagePoolEventRegisterAny(
None, refreshid, self._storage_pool_refresh_event, None))
self.using_storage_pool_events = True
log.debug("Using storage pool events")
except Exception as e:
self.using_storage_pool_events = False
log.debug("Error registering storage pool events: %s", e)
try:
_check_events_disabled()
eventid = getattr(libvirt, "VIR_NODE_DEVICE_EVENT_ID_LIFECYCLE", 0)
updateid = getattr(libvirt, "VIR_NODE_DEVICE_EVENT_ID_UPDATE", 1)
self._node_device_cb_ids.append(
self.get_backend().nodeDeviceEventRegisterAny(
None, eventid, self._node_device_lifecycle_event, None))
self._node_device_cb_ids.append(
self.get_backend().nodeDeviceEventRegisterAny(
None, updateid, self._node_device_update_event, None))
self.using_node_device_events = True
log.debug("Using node device events")
except Exception as e:
self.using_network_events = False
log.debug("Error registering node device events: %s", e)
######################################
# Connection closing/opening methods #
######################################
def _schedule_close(self):
self._closing = True
self.idle_add(self.close)
def close(self):
if not self.is_disconnected():
log.debug("conn.close() uri=%s", self.get_uri())
self._closing = True
try:
if self._backend.is_open():
for eid in self._domain_cb_ids:
self._backend.domainEventDeregisterAny(eid)
for eid in self._network_cb_ids:
self._backend.networkEventDeregisterAny(eid)
for eid in self._storage_pool_cb_ids:
self._backend.storagePoolEventDeregisterAny(eid)
for eid in self._node_device_cb_ids:
self._backend.nodeDeviceEventDeregisterAny(eid)
except Exception:
log.debug("Failed to deregister events in conn cleanup",
exc_info=True)
finally:
self._domain_cb_ids = []
self._network_cb_ids = []
self._storage_pool_cb_ids = []
self._node_device_cb_ids = []
self._stats = []
if self._init_object_event:
self._init_object_event.clear()
for obj in self._objects.all_objects():
self._objects.remove(obj)
try:
self._remove_object_signal(obj)
obj.cleanup()
except Exception as e:
log.debug("Failed to cleanup %s: %s", obj, e)
self._objects.cleanup()
self._objects = _ObjectList()
closeret = self._backend.close()
if closeret == 1 and self.config.CLITestOptions.leak_debug:
log.debug("LEAK: conn close() returned 1, "
"meaning refs may have leaked.")
self._change_state(self._STATE_DISCONNECTED)
self._closing = False
def _cleanup(self):
self.close()
self._objects = None
self._backend.cb_fetch_all_domains = None
self._backend.cb_fetch_all_pools = None
self._backend.cb_fetch_all_nodedevs = None
self._backend.cb_fetch_all_vols = None
self._backend.cb_cache_new_pool = None
def open(self):
if not self.is_disconnected():
return
self._change_state(self._STATE_CONNECTING)
log.debug("Scheduling background open thread for %s",
self.get_uri())
self._start_thread(self._open_thread, "Connect %s" % self.get_uri())
def _do_open(self):
warnconsole = False
libvirt_error_code = None
libvirt_error_message = None
exc = None
try:
self._backend.open(connectauth.creds_dialog, self)
return True, None
except Exception as e:
exc = e
tb = "".join(traceback.format_exc())
if isinstance(exc, libvirt.libvirtError):
# pylint: disable=no-member
libvirt_error_code = exc.get_error_code()
libvirt_error_message = exc.get_error_message()
if (libvirt_error_code ==
getattr(libvirt, "VIR_ERR_AUTH_CANCELLED", None)):
log.debug("User cancelled auth, not raising any error.")
return False, None
if (libvirt_error_code == libvirt.VIR_ERR_AUTH_FAILED and
"not authorized" in libvirt_error_message.lower()):
log.debug("Looks like we might have failed policykit "
"auth. Checking to see if we have a valid "
"console session")
if (not self.is_remote() and
not connectauth.do_we_have_session()):
warnconsole = True
ConnectError = connectauth.connect_error(
self, str(exc), tb, warnconsole)
return False, ConnectError
def _populate_initial_state(self):
log.debug("libvirt version=%s", self._backend.local_libvirt_version())
log.debug("daemon version=%s", self._backend.daemon_version())
log.debug("conn version=%s", self._backend.conn_version())
log.debug("%s capabilities:\n%s", self.get_uri(), self.caps.get_xml())
if not self.support.conn_domain():
raise RuntimeError("Connection does not support required "
"domain listing APIs")
if not self.support.conn_storage():
log.debug("Connection doesn't seem to support storage APIs.")
if not self.support.conn_network():
log.debug("Connection doesn't seem to support network APIs.")
if not self.support.conn_nodedev():
log.debug("Connection doesn't seem to support nodedev APIs.")
self._add_conn_events()
try:
self._backend.setKeepAlive(20, 1)
except Exception as e:
log.debug("Failed to setKeepAlive: %s", str(e))
# The initial tick will set up a threading event that will only
# trigger after all the polled libvirt objects are fully initialized.
# That way we only report the connection is open when everything is
# nicely setup for the rest of the app.
self._init_object_event = threading.Event()
self._init_object_count = 0
self.schedule_priority_tick(stats_update=True,
pollvm=True, pollnet=True,
pollpool=True, pollnodedev=True,
force=True, initial_poll=True)
self._init_object_event.wait()
self._init_object_event = None
self._init_object_count = None
# Try to create the default storage pool
# We need this after events setup so we can determine if the default
# pool already exists
try:
virtinst.StoragePool.build_default_pool(self.get_backend())
except Exception as e:
log.debug("Building default pool failed: %s", str(e))
def _open_thread(self):
ConnectError = None
try:
is_active, ConnectError = self._do_open()
if is_active:
self._populate_initial_state()
self.idle_add(self._change_state, is_active and
self._STATE_ACTIVE or self._STATE_DISCONNECTED)
except Exception as e:
is_active = False
self._schedule_close()
ConnectError = connectauth.connect_error(self, str(e),
"".join(traceback.format_exc()), False)
self.idle_emit("open-completed", ConnectError)
#######################
# Tick/Update methods #
#######################
def _remove_object_signal(self, obj):
if obj.is_domain():
self.emit("vm-removed", obj.get_connkey())
elif obj.is_network():
self.emit("net-removed", obj.get_connkey())
elif obj.is_pool():
self.emit("pool-removed", obj.get_connkey())
elif obj.is_nodedev():
self.emit("nodedev-removed", obj.get_connkey())
def _gone_object_signals(self, gone_objects):
"""
Responsible for signaling the UI for any updates. All possible UI
updates need to go here to enable threading that doesn't block the
app with long tick operations.
"""
if not self._backend.is_open():
return
for obj in gone_objects:
class_name = obj.class_name()
try:
name = obj.get_name()
except Exception:
name = str(obj)
if not self._objects.remove(obj):
log.debug("Requested removal of %s=%s, but it's "
"not in our object list.", class_name, name)
continue
log.debug("%s=%s removed", class_name, name)
self._remove_object_signal(obj)
obj.cleanup()
def _new_object_cb(self, obj, initialize_failed):
if not self._backend.is_open():
return
try:
class_name = obj.class_name()
if initialize_failed:
log.debug("Blacklisting %s=%s", class_name, obj.get_name())
count = self._objects.add_blacklist(obj)
if count <= _ObjectList.BLACKLIST_COUNT:
log.debug("Object added in blacklist, count=%d", count)
else:
log.debug("Object already blacklisted?")
return
else:
self._objects.remove_blacklist(obj)
if not self._objects.add(obj):
log.debug("New %s=%s requested, but it's already tracked.",
class_name, obj.get_name())
return
if not obj.is_nodedev():
# Skip nodedev logging since it's noisy and not interesting
log.debug("%s=%s status=%s added", class_name,
obj.get_name(), obj.run_status())
if obj.is_domain():
self.emit("vm-added", obj.get_connkey())
elif obj.is_network():
self.emit("net-added", obj.get_connkey())
elif obj.is_pool():
self.emit("pool-added", obj.get_connkey())
elif obj.is_nodedev():
self.emit("nodedev-added", obj.get_connkey())
finally:
if self._init_object_event:
self._init_object_count -= 1
if self._init_object_count <= 0:
self._init_object_event.set()
def _poll(self, initial_poll,
pollvm, pollnet, pollpool, pollnodedev):
"""
Helper called from tick() to do necessary polling and return
the relevant object lists
"""
gone_objects = []
preexisting_objects = []
def _process_objects(ptype):
if ptype == "nets":
dopoll = pollnet
objs = self.list_nets()
cls = vmmNetwork
pollcb = pollhelpers.fetch_nets
elif ptype == "pools":
dopoll = pollpool
objs = self.list_pools()
cls = vmmStoragePool
pollcb = pollhelpers.fetch_pools
elif ptype == "nodedevs":
dopoll = pollnodedev
objs = self.list_nodedevs()
cls = vmmNodeDevice
pollcb = pollhelpers.fetch_nodedevs
else:
dopoll = pollvm
objs = self.list_vms()
cls = vmmDomain
pollcb = pollhelpers.fetch_vms
keymap = dict((o.get_connkey(), o) for o in objs)
def cb(obj, key):
return cls(self, obj, key)
if dopoll:
gone, new, master = pollcb(self._backend, keymap, cb)
else:
gone, new, master = [], [], list(keymap.values())
if initial_poll:
self._init_object_count += len(new)
gone_objects.extend(gone)
preexisting_objects.extend([o for o in master if o not in new])
new = [n for n in new if not self._objects.in_blacklist(n)]
return new
new_vms = _process_objects("vms")
new_nets = _process_objects("nets")
new_pools = _process_objects("pools")
new_nodedevs = _process_objects("nodedevs")
# Kick off one thread per object type to handle the initial
# XML fetching. Going any more fine grained then this probably
# won't be that useful due to libvirt's locking structure.
#
# Would prefer to start refreshing some objects before all polling
# is complete, but we need init_object_count to be fully accurate
# before we start initializing objects
if initial_poll and self._init_object_count == 0:
# If the connection doesn't have any objects, new_object_cb
# is never called and the event is never set, so let's do it here
self._init_object_event.set()
for newlist in [new_vms, new_nets, new_pools, new_nodedevs]:
if not newlist:
continue
def cb(lst):
for obj in lst:
obj.connect_once("initialized", self._new_object_cb)
obj.init_libvirt_state()
self._start_thread(cb,
"refreshing xml for new %s" % newlist[0].class_name(),
args=(newlist,))
return gone_objects, preexisting_objects
def _tick(self, stats_update=False,
pollvm=False, pollnet=False,
pollpool=False, pollnodedev=False,
force=False, initial_poll=False):
"""
main update function: polls for new objects, updates stats, ...
:param force: Perform the requested polling even if async events
are in use.
"""
if self._closing:
return
if self.is_disconnected():
return
if self.is_connecting() and not force:
return
# We need to set this before the event check, since stats polling
# is independent of events
if not pollvm:
stats_update = False
if self.using_domain_events and not force:
pollvm = False
if self.using_network_events and not force:
pollnet = False
if self.using_storage_pool_events and not force:
pollpool = False
if self.using_node_device_events and not force:
pollnodedev = False
self._hostinfo = self._backend.getInfo()
if stats_update:
self.statsmanager.cache_all_stats(self)
gone_objects, preexisting_objects = self._poll(
initial_poll, pollvm, pollnet, pollpool, pollnodedev)
self.idle_add(self._gone_object_signals, gone_objects)
# Only tick() pre-existing objects, since new objects will be
# initialized asynchronously and tick() would be redundant
for obj in preexisting_objects:
try:
if obj.reports_stats() and stats_update:
pass
elif obj.is_domain() and not pollvm:
continue
elif obj.is_network() and not pollnet:
continue
elif obj.is_pool() and not pollpool:
continue
elif obj.is_nodedev() and not pollnodedev:
continue
obj.tick(stats_update=stats_update)
except Exception as e:
log.exception("Tick for %s failed", obj)
if (isinstance(e, libvirt.libvirtError) and
(getattr(e, "get_error_code")() ==
libvirt.VIR_ERR_SYSTEM_ERROR)):
# Try a simple getInfo call to see if conn was dropped
self._backend.getInfo()
log.debug("vm tick raised system error but "
"connection doesn't seem to have dropped. "
"Ignoring.")
if stats_update:
self._recalculate_stats(
[o for o in preexisting_objects if o.reports_stats()])
self.idle_emit("resources-sampled")
def _recalculate_stats(self, vms):
if not self._backend.is_open():
return
now = time.time()
expected = self.config.get_stats_history_length()
current = len(self._stats)
if current > expected:
del self._stats[expected:current]
mem = 0
cpuTime = 0
rdRate = 0
wrRate = 0
rxRate = 0
txRate = 0
diskMaxRate = self.disk_io_max_rate() or 10.0
netMaxRate = self.network_traffic_max_rate() or 10.0
for vm in vms:
if not vm.is_active():
continue
cpuTime += vm.cpu_time()
mem += vm.stats_memory()
rdRate += vm.disk_read_rate()
wrRate += vm.disk_write_rate()
rxRate += vm.network_rx_rate()
txRate += vm.network_tx_rate()
netMaxRate = max(netMaxRate, vm.network_traffic_max_rate())
diskMaxRate = max(diskMaxRate, vm.disk_io_max_rate())
pcentHostCpu = 0
pcentMem = mem * 100.0 / self.host_memory_size()
if len(self._stats) > 0:
prevTimestamp = self._stats[0]["timestamp"]
host_cpus = self.host_active_processor_count()
pcentHostCpu = ((cpuTime) * 100.0 /
((now - prevTimestamp) *
1000.0 * 1000.0 * 1000.0 * host_cpus))
pcentHostCpu = max(0.0, min(100.0, pcentHostCpu))
pcentMem = max(0.0, min(100.0, pcentMem))
newStats = {
"timestamp": now,
"memory": mem,
"memoryPercent": pcentMem,
"cpuTime": cpuTime,
"cpuHostPercent": pcentHostCpu,
"diskRdRate": rdRate,
"diskWrRate": wrRate,
"netRxRate": rxRate,
"netTxRate": txRate,
"diskMaxRate": diskMaxRate,
"netMaxRate": netMaxRate,
}
self._stats.insert(0, newStats)
def schedule_priority_tick(self, **kwargs):
from .engine import vmmEngine
vmmEngine.get_instance().schedule_priority_tick(self, kwargs)
def tick_from_engine(self, *args, **kwargs):
e = None
try:
self._tick(*args, **kwargs)
except Exception as err:
e = err
if e is None:
return
from_remote = getattr(libvirt, "VIR_FROM_REMOTE", None)
from_rpc = getattr(libvirt, "VIR_FROM_RPC", None)
sys_error = getattr(libvirt, "VIR_ERR_SYSTEM_ERROR", None)
internal_error = getattr(libvirt, "VIR_ERR_INTERNAL_ERROR", None)
dom = -1
code = -1
if isinstance(e, libvirt.libvirtError):
# pylint: disable=no-member
dom = e.get_error_domain()
code = e.get_error_code()
log.debug("Error polling connection %s",
self.get_uri(), exc_info=True)
if (dom in [from_remote, from_rpc] and
code in [sys_error, internal_error]):
e = None
log.debug("Not showing user error since libvirtd "
"appears to have stopped.")
self._schedule_close()
if e:
raise e # pylint: disable=raising-bad-type
########################
# Stats getter methods #
########################
def _get_record_helper(self, record_name):
if len(self._stats) == 0:
return 0
return self._stats[0][record_name]
def _vector_helper(self, record_name, limit, ceil=100.0):
vector = []
statslen = self.config.get_stats_history_length() + 1
if limit is not None:
statslen = min(statslen, limit)
for i in range(statslen):
if i < len(self._stats):
vector.append(self._stats[i][record_name] / ceil)
else:
vector.append(0)
return vector
def stats_memory_vector(self, limit=None):
return self._vector_helper("memoryPercent", limit)
def host_cpu_time_vector(self, limit=None):
return self._vector_helper("cpuHostPercent", limit)
def stats_memory(self):
return self._get_record_helper("memory")
def host_cpu_time_percentage(self):
return self._get_record_helper("cpuHostPercent")
def guest_cpu_time_percentage(self):
return self.host_cpu_time_percentage()
def network_traffic_rate(self):
return (self._get_record_helper("netRxRate") +
self._get_record_helper("netTxRate"))
def disk_io_rate(self):
return (self._get_record_helper("diskRdRate") +
self._get_record_helper("diskWrRate"))
def network_traffic_max_rate(self):
return self._get_record_helper("netMaxRate")
def disk_io_max_rate(self):
return self._get_record_helper("diskMaxRate")
###########################
# Per-conn config helpers #
###########################
def get_autoconnect(self):
return self.config.get_conn_autoconnect(self.get_uri())
def set_autoconnect(self, val):
self.config.set_conn_autoconnect(self.get_uri(), val)
def set_config_pretty_name(self, value):
cfgname = self._get_config_pretty_name()
if value == cfgname:
return
if not cfgname and value == self.get_pretty_desc():
# Don't encode the default connection value into gconf right
# away, require the user to edit it first
return
self.config.set_perconn(self.get_uri(), "/pretty-name", value)
def _get_config_pretty_name(self):
return self.config.get_perconn(self.get_uri(), "/pretty-name")
def _on_config_pretty_name_changed(self, *args, **kwargs):
return self.config.listen_perconn(self.get_uri(), "/pretty-name",
*args, **kwargs)
def _config_pretty_name_changed_cb(self):
self.emit("state-changed")
def set_details_window_size(self, w, h):
self.config.set_perconn(self.get_uri(), "/window-size", (w, h))
def get_details_window_size(self):
ret = self.config.get_perconn(self.get_uri(), "/window-size")
return ret
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