mirror of
https://github.com/virt-manager/virt-manager.git
synced 2024-10-27 10:25:25 +03:00
275 lines
9.5 KiB
Python
275 lines
9.5 KiB
Python
#
|
|
# Copyright (C) 2011, 2013 Red Hat, Inc.
|
|
#
|
|
# 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.
|
|
#
|
|
|
|
from Queue import Queue
|
|
from threading import Thread
|
|
import logging
|
|
|
|
from guestfs import GuestFS # pylint: disable=import-error
|
|
|
|
from .baseclass import vmmGObject
|
|
from .domain import vmmInspectionData
|
|
|
|
|
|
class vmmInspection(vmmGObject):
|
|
# Can't find a way to make Thread release our reference
|
|
_leak_check = False
|
|
|
|
def __init__(self):
|
|
vmmGObject.__init__(self)
|
|
|
|
self._thread = Thread(name="inspection thread", target=self._run)
|
|
self._thread.daemon = True
|
|
self._wait = 5 * 1000 # 5 seconds
|
|
|
|
self._q = Queue()
|
|
self._conns = {}
|
|
self._vmseen = {}
|
|
self._cached_data = {}
|
|
|
|
def _cleanup(self):
|
|
self._thread = None
|
|
self._q = Queue()
|
|
self._conns = {}
|
|
self._vmseen = {}
|
|
self._cached_data = {}
|
|
|
|
# Called by the main thread whenever a connection is added or
|
|
# removed. We tell the inspection thread, so it can track
|
|
# connections.
|
|
def conn_added(self, engine_ignore, conn):
|
|
obj = ("conn_added", conn)
|
|
self._q.put(obj)
|
|
|
|
def conn_removed(self, engine_ignore, uri):
|
|
obj = ("conn_removed", uri)
|
|
self._q.put(obj)
|
|
|
|
# Called by the main thread whenever a VM is added to vmlist.
|
|
def vm_added(self, conn, connkey):
|
|
if connkey.startswith("guestfs-"):
|
|
logging.debug("ignore libvirt/guestfs temporary VM %s",
|
|
connkey)
|
|
return
|
|
|
|
obj = ("vm_added", conn.get_uri(), connkey)
|
|
self._q.put(obj)
|
|
|
|
def vm_refresh(self, vm):
|
|
obj = ("vm_refresh", vm.conn.get_uri(), vm.get_name(), vm.get_uuid())
|
|
self._q.put(obj)
|
|
|
|
def start(self):
|
|
# Wait a few seconds before we do anything. This prevents
|
|
# inspection from being a burden for initial virt-manager
|
|
# interactivity (although it shouldn't affect interactivity at
|
|
# all).
|
|
def cb():
|
|
self._thread.start()
|
|
return 0
|
|
|
|
logging.debug("waiting")
|
|
self.timeout_add(self._wait, cb)
|
|
|
|
def _run(self):
|
|
# Process everything on the queue. If the queue is empty when
|
|
# called, block.
|
|
while True:
|
|
obj = self._q.get()
|
|
self._process_queue_item(obj)
|
|
self._q.task_done()
|
|
|
|
def _process_queue_item(self, obj):
|
|
if obj[0] == "conn_added":
|
|
conn = obj[1]
|
|
uri = conn.get_uri()
|
|
if conn and not (conn.is_remote()) and not (uri in self._conns):
|
|
self._conns[uri] = conn
|
|
conn.connect("vm-added", self.vm_added)
|
|
# No need to push the VMs of the newly added
|
|
# connection manually into the queue, as the above
|
|
# connect() will emit vm-added signals for all of
|
|
# its VMs.
|
|
elif obj[0] == "conn_removed":
|
|
uri = obj[1]
|
|
del self._conns[uri]
|
|
elif obj[0] == "vm_added" or obj[0] == "vm_refresh":
|
|
uri = obj[1]
|
|
if not (uri in self._conns):
|
|
# This connection disappeared in the meanwhile.
|
|
return
|
|
conn = self._conns[uri]
|
|
if not conn.is_active():
|
|
return
|
|
connkey = obj[2]
|
|
vm = conn.get_vm(connkey)
|
|
if not vm:
|
|
# The VM was removed in the meanwhile.
|
|
return
|
|
if obj[0] == "vm_refresh":
|
|
vmuuid = obj[3]
|
|
# When refreshing the inspection data of a VM,
|
|
# all we need is to remove it from the "seen" cache,
|
|
# as the data itself will be replaced once the new
|
|
# results are available.
|
|
del self._vmseen[vmuuid]
|
|
self._process_vm(conn, vm)
|
|
|
|
# Try processing a single VM, keeping into account whether it was
|
|
# visited already, and whether there are cached data for it.
|
|
def _process_vm(self, conn, vm):
|
|
def set_inspection_error(vm):
|
|
data = vmmInspectionData()
|
|
data.error = True
|
|
self._set_vm_inspection_data(vm, data)
|
|
|
|
vmuuid = vm.get_uuid()
|
|
prettyvm = vmuuid
|
|
try:
|
|
prettyvm = conn.get_uri() + ":" + vm.get_name()
|
|
|
|
if vmuuid in self._vmseen:
|
|
data = self._cached_data.get(vmuuid)
|
|
if not data:
|
|
return
|
|
|
|
if vm.inspection != data:
|
|
logging.debug("Found cached data for %s", prettyvm)
|
|
self._set_vm_inspection_data(vm, data)
|
|
return
|
|
|
|
# Whether success or failure, we've "seen" this VM now.
|
|
self._vmseen[vmuuid] = True
|
|
try:
|
|
data = self._inspect_vm(conn, vm)
|
|
if data:
|
|
self._set_vm_inspection_data(vm, data)
|
|
else:
|
|
set_inspection_error(vm)
|
|
except:
|
|
set_inspection_error(vm)
|
|
raise
|
|
except:
|
|
logging.exception("%s: exception while processing", prettyvm)
|
|
|
|
def _inspect_vm(self, conn, vm):
|
|
g = GuestFS(close_on_exit=False)
|
|
prettyvm = conn.get_uri() + ":" + vm.get_name()
|
|
|
|
g.add_libvirt_dom(vm.get_backend(), readonly=1)
|
|
|
|
g.launch()
|
|
|
|
# Inspect the operating system.
|
|
roots = g.inspect_os()
|
|
if len(roots) == 0:
|
|
logging.debug("%s: no operating systems found", prettyvm)
|
|
return None
|
|
|
|
# Arbitrarily pick the first root device.
|
|
root = roots[0]
|
|
|
|
# Inspection results.
|
|
os_type = g.inspect_get_type(root) # eg. "linux"
|
|
distro = g.inspect_get_distro(root) # eg. "fedora"
|
|
major_version = g.inspect_get_major_version(root) # eg. 14
|
|
minor_version = g.inspect_get_minor_version(root) # eg. 0
|
|
hostname = g.inspect_get_hostname(root) # string
|
|
product_name = g.inspect_get_product_name(root) # string
|
|
product_variant = g.inspect_get_product_variant(root) # string
|
|
|
|
# For inspect_list_applications and inspect_get_icon we
|
|
# require that the guest filesystems are mounted. However
|
|
# don't fail if this is not possible (I'm looking at you,
|
|
# FreeBSD).
|
|
filesystems_mounted = False
|
|
try:
|
|
# Mount up the disks, like guestfish --ro -i.
|
|
|
|
# Sort keys by length, shortest first, so that we end up
|
|
# mounting the filesystems in the correct order.
|
|
mps = list(g.inspect_get_mountpoints(root))
|
|
def compare(a, b):
|
|
if len(a[0]) > len(b[0]):
|
|
return 1
|
|
elif len(a[0]) == len(b[0]):
|
|
return 0
|
|
else:
|
|
return -1
|
|
mps.sort(compare)
|
|
|
|
for mp_dev in mps:
|
|
try:
|
|
g.mount_ro(mp_dev[1], mp_dev[0])
|
|
except:
|
|
logging.exception("%s: exception mounting %s on %s "
|
|
"(ignored)",
|
|
prettyvm, mp_dev[1], mp_dev[0])
|
|
|
|
filesystems_mounted = True
|
|
except:
|
|
logging.exception("%s: exception while mounting disks (ignored)",
|
|
prettyvm)
|
|
|
|
icon = None
|
|
apps = None
|
|
if filesystems_mounted:
|
|
# string containing PNG data
|
|
icon = g.inspect_get_icon(root, favicon=0, highquality=1)
|
|
if icon == "" or icon is None:
|
|
# no high quality icon, try a low quality one
|
|
icon = g.inspect_get_icon(root, favicon=0, highquality=0)
|
|
if icon == "":
|
|
icon = None
|
|
|
|
# Inspection applications.
|
|
apps = g.inspect_list_applications(root)
|
|
|
|
# Force the libguestfs handle to close right now.
|
|
del g
|
|
|
|
# Log what we found.
|
|
logging.debug("%s: detected operating system: %s %s %d.%d (%s)",
|
|
prettyvm, os_type, distro, major_version, minor_version,
|
|
product_name)
|
|
logging.debug("hostname: %s", hostname)
|
|
if icon:
|
|
logging.debug("icon: %d bytes", len(icon))
|
|
if apps:
|
|
logging.debug("# apps: %d", len(apps))
|
|
|
|
data = vmmInspectionData()
|
|
data.os_type = str(os_type)
|
|
data.distro = str(distro)
|
|
data.major_version = int(major_version)
|
|
data.minor_version = int(minor_version)
|
|
data.hostname = str(hostname)
|
|
data.product_name = str(product_name)
|
|
data.product_variant = str(product_variant)
|
|
data.icon = icon
|
|
data.applications = list(apps)
|
|
data.error = False
|
|
|
|
return data
|
|
|
|
def _set_vm_inspection_data(self, vm, data):
|
|
vm.inspection = data
|
|
vm.inspection_data_updated()
|
|
self._cached_data[vm.get_uuid()] = data
|