# # Common code for all guests # # Copyright 2006-2009, 2013 Red Hat, Inc. # Jeremy Katz # # 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 urlgrabber.progress as progress import libvirt from virtcli import cliconfig import virtinst from virtinst import util from virtinst import support from virtinst import OSXML from virtinst import VirtualDisk from virtinst import VirtualDevice from virtinst import Clock from virtinst import Seclabel from virtinst import CPU from virtinst import DomainNumatune from virtinst import DomainFeatures from virtinst.xmlbuilder import XMLBuilder, XMLProperty, XMLChildProperty from virtinst import osdict class Guest(XMLBuilder): @staticmethod def check_vm_collision(conn, name, do_remove): """ Remove the existing VM with the same name if requested, or error if there is a collision. """ vm = None try: vm = conn.lookupByName(name) except libvirt.libvirtError: pass if vm is None: return if not do_remove: raise RuntimeError(_("Domain named %s already exists!") % name) try: logging.debug("Explicitly replacing guest '%s'", name) if vm.ID() != -1: logging.info("Destroying guest '%s'", name) vm.destroy() logging.info("Undefining guest '%s'", name) vm.undefine() except libvirt.libvirtError, e: raise RuntimeError(_("Could not remove old vm '%s': %s") % (str(e))) @staticmethod def validate_name(conn, name, check_collision): util.validate_name(_("Guest"), name, lencheck=True) if not check_collision: return try: conn.lookupByName(name) except: return raise ValueError(_("Guest name '%s' is already in use.") % name) _XML_ROOT_NAME = "domain" _XML_PROP_ORDER = ["type", "name", "uuid", "title", "description", "maxmemory", "memory", "hugepage", "vcpus", "curvcpus", "numatune", "bootloader", "os", "features", "cpu", "clock", "on_poweroff", "on_reboot", "on_crash", "emulator", "_devices", "seclabel"] def __init__(self, *args, **kwargs): XMLBuilder.__init__(self, *args, **kwargs) self.autostart = False self.replace = False self.os_autodetect = False # Allow virt-manager to override the default graphics type self.default_graphics_type = cliconfig.default_graphics self._os_variant = None self._random_uuid = None self._install_devices = [] # The libvirt virDomain object we 'Create' self.domain = None self.installer = virtinst.DistroInstaller(self.conn) ###################### # Property accessors # ###################### def _validate_name(self, val): if val == self.name: return self.validate_name(self.conn, val, check_collision=not self.replace) name = XMLProperty("./name", validate_cb=_validate_name) def _set_memory(self, val): if val is None: return None if self.maxmemory is None or self.maxmemory < val: self.maxmemory = val return val memory = XMLProperty("./currentMemory", is_int=True, default_cb=lambda s: 1, set_converter=_set_memory) maxmemory = XMLProperty("./memory", is_int=True) def _set_vcpus(self, val): if val is None: return None # Don't force set curvcpus unless already specified if self.curvcpus is not None and self.curvcpus > val: self.curvcpus = val return val vcpus = XMLProperty("./vcpu", is_int=True, set_converter=_set_vcpus, default_cb=lambda s: 1) curvcpus = XMLProperty("./vcpu/@current", is_int=True) def _validate_cpuset(self, val): DomainNumatune.validate_cpuset(self.conn, val) cpuset = XMLProperty("./vcpu/@cpuset", validate_cb=_validate_cpuset) def _get_default_uuid(self): if self._random_uuid is None: self._random_uuid = util.generate_uuid(self.conn) return self._random_uuid uuid = XMLProperty("./uuid", validate_cb=lambda s, v: util.validate_uuid(v), default_cb=_get_default_uuid) id = XMLProperty("./@id", is_int=True) type = XMLProperty("./@type", default_cb=lambda s: "xen") hugepage = XMLProperty("./memoryBacking/hugepages", is_bool=True) bootloader = XMLProperty("./bootloader") description = XMLProperty("./description") title = XMLProperty("./title") emulator = XMLProperty("./devices/emulator") on_poweroff = XMLProperty("./on_poweroff", default_cb=lambda s: "destroy") on_reboot = XMLProperty("./on_reboot") on_crash = XMLProperty("./on_crash") os = XMLChildProperty(OSXML, is_single=True) features = XMLChildProperty(DomainFeatures, is_single=True) clock = XMLChildProperty(Clock, is_single=True) seclabel = XMLChildProperty(Seclabel, is_single=True) cpu = XMLChildProperty(CPU, is_single=True) numatune = XMLChildProperty(DomainNumatune, is_single=True) ############################### # Distro detection properties # ############################### def _get_os_variant(self): return self._os_variant def _set_os_variant(self, val): val = val.lower() if osdict.lookup_os(val) is None: raise ValueError(_("Distro '%s' does not exist in our dictionary") % val) self._os_variant = val os_variant = property(_get_os_variant, _set_os_variant) ######################################## # Device Add/Remove Public API methods # ######################################## def add_device(self, dev): """ Add the passed device to the guest's device list. @param dev: VirtualDevice instance to attach to guest @param set_defaults: Whether to set defaults for the device """ self._add_child(dev) def remove_device(self, dev): """ Remove the passed device from the guest's device list @param dev: VirtualDevice instance """ self._remove_child(dev) def get_devices(self, devtype): """ Return a list of devices of type 'devtype' that will installed on the guest. @param devtype: Device type to search for (one of VirtualDevice.virtual_device_types) """ newlist = [] for i in self._devices: if devtype == "all" or i.virtual_device_type == devtype: newlist.append(i) return newlist _devices = XMLChildProperty( [VirtualDevice.virtual_device_classes[_n] for _n in VirtualDevice.virtual_device_types], relative_xpath="./devices") def get_all_devices(self): """ Return a list of all devices being installed with the guest """ retlist = [] for devtype in VirtualDevice.virtual_device_types: retlist.extend(self.get_devices(devtype)) return retlist ############################ # Install Helper functions # ############################ def _prepare_install(self, meter, dry=False): for dev in self._install_devices: self.remove_device(dev) self._install_devices = [] ignore = dry # Fetch install media, prepare installer devices self.installer.prepare(self, meter, util.make_scratchdir(self.conn, self.type)) # Initialize install device list for dev in self.installer.install_devices: self.add_device(dev) self._install_devices.append(dev) ############## # Public API # ############## def _prepare_get_xml(self): # We do a shallow copy of the device list here, and set the defaults. # This way, default changes aren't persistent, and we don't need # to worry about when to call set_defaults # # XXX: this is hacky, we should find a way to use xmlbuilder.copy(), # but need to make sure it's not a massive performance hit data = (self._devices[:], self.features, self.os) try: self._propstore["_devices"] = [dev.copy() for dev in self._devices] self._propstore["features"] = self.features.copy() self._propstore["os"] = self.os.copy() except: self._finish_get_xml(data) raise return data def _finish_get_xml(self, data): (self._propstore["_devices"], self._propstore["features"], self._propstore["os"]) = data def get_install_xml(self, *args, **kwargs): data = self._prepare_get_xml() try: return self._do_get_install_xml(*args, **kwargs) finally: self._finish_get_xml(data) def _do_get_install_xml(self, install=True, disk_boot=False): """ Return the full Guest xml configuration. @param install: Whether we want the 'OS install' configuration or the 'post-install' configuration. (Some Installers, like the LiveCDInstaller may not have an 'install' config.) @type install: C{bool} @param disk_boot: Whether we should boot off the harddisk, regardless of our position in the install process (this is used for 2 stage installs, where the second stage boots off the disk. You probably don't need to touch this.) @type disk_boot: C{bool} """ osblob_install = install and not disk_boot if osblob_install and not self.installer.has_install_phase(): return None self.installer.alter_bootconfig(self, osblob_install, self.os) self._set_transient_device_defaults(install) action = install and "destroy" or "restart" self.on_reboot = action self.on_crash = action self._set_defaults() self.bootloader = None if (not install and self.os.is_xenpv() and not self.os.kernel): self.bootloader = "/usr/bin/pygrub" self.os.clear() return self.get_xml_config() def get_continue_inst(self): """ Return True if this guest requires a call to 'continue_install', which means the OS requires a 2 stage install (windows) """ # If we are doing an 'import' or 'liveCD' install, there is # no true install process, so continue install has no meaning if not self.installer.has_install_phase(): return False return self._lookup_osdict_key("three_stage_install", False) ########################## # Actual install methods # ########################## def start_install(self, meter=None, dry=False, return_xml=False, noboot=False): """ Begin the guest install (stage1). @param return_xml: Don't create the guest, just return generated XML """ if self.domain is not None: raise RuntimeError(_("Domain has already been started!")) is_initial = True self._prepare_install(meter, dry) try: # Create devices if required (disk images, etc.) if not dry: for dev in self.get_all_devices(): dev.setup(meter) start_xml, final_xml = self._build_xml(is_initial) if return_xml: return (start_xml, final_xml) if dry: return # Remove existing VM if requested self.check_vm_collision(self.conn, self.name, do_remove=self.replace) self.domain = self._create_guest(meter, start_xml, final_xml, is_initial, noboot) # Set domain autostart flag if requested self._flag_autostart() return self.domain finally: self.installer.cleanup() def continue_install(self, meter=None, dry=False, return_xml=False): """ Continue with stage 2 of a guest install. Only required for guests which have the 'continue' flag set (accessed via get_continue_inst) """ is_initial = False start_xml, final_xml = self._build_xml(is_initial) if return_xml: return (start_xml, final_xml) if dry: return return self._create_guest(meter, start_xml, final_xml, is_initial, False) def _build_meter(self, meter, is_initial): if is_initial: meter_label = _("Creating domain...") else: meter_label = _("Starting domain...") if meter is None: meter = progress.BaseMeter() meter.start(size=None, text=meter_label) return meter def _build_xml(self, is_initial): log_label = is_initial and "install" or "continue" disk_boot = not is_initial start_xml = self.get_install_xml(install=True, disk_boot=disk_boot) final_xml = self.get_install_xml(install=False) logging.debug("Generated %s XML: %s", log_label, (start_xml and ("\n" + start_xml) or "None required")) logging.debug("Generated boot XML: \n%s", final_xml) return start_xml, final_xml def _create_guest(self, meter, start_xml, final_xml, is_initial, noboot): """ Actually do the XML logging, guest defining/creating, console launching and waiting @param is_initial: If running initial guest creation, else we are continuing the install @param noboot: Don't boot guest if no install phase """ meter = self._build_meter(meter, is_initial) doboot = not noboot or self.installer.has_install_phase() if is_initial and doboot: dom = self.conn.createLinux(start_xml or final_xml, 0) else: dom = self.conn.defineXML(start_xml or final_xml) if doboot: dom.create() self.domain = dom meter.end(0) self.domain = self.conn.defineXML(final_xml) if is_initial: try: logging.debug("XML fetched from libvirt object:\n%s", dom.XMLDesc(0)) except Exception, e: logging.debug("Error fetching XML from libvirt object: %s", e) return self.domain def _flag_autostart(self): """ Set the autostart flag for self.domain if the user requested it """ if not self.autostart: return try: self.domain.setAutostart(True) except libvirt.libvirtError, e: if util.is_error_nosupport(e): logging.warn("Could not set autostart flag: libvirt " "connection does not support autostart.") else: raise e ################################### # Guest Dictionary Helper methods # ################################### def _lookup_osdict_key(self, key, default): """ Use self.os_variant to find key in OSTYPES @returns: dict value, or None if os_type/variant wasn't set """ return osdict.lookup_osdict_key(self.os_variant, key, default) ################### # Device defaults # ################### def add_default_input_device(self): if self.os.is_container(): return if not self.os.is_x86(): return if self.get_devices("input"): return self.add_device(virtinst.VirtualInputDevice(self.conn)) def add_default_sound_device(self): if not self.os.is_hvm(): return if not self.os.is_x86(): return self.add_device(virtinst.VirtualAudio(self.conn)) def add_default_console_device(self): if self.os.is_xenpv(): return if self.get_devices("console") or self.get_devices("serial"): return dev = virtinst.VirtualConsoleDevice(self.conn) dev.type = dev.TYPE_PTY if (self.os.is_x86() and self._lookup_osdict_key("virtioconsole", False) and self.conn.check_conn_support( self.conn.SUPPORT_CONN_VIRTIO_CONSOLE)): dev.target_type = "virtio" self.add_device(dev) def add_default_video_device(self): if self.os.is_container(): return if self.get_devices("video"): return if not self.get_devices("graphics"): return self.add_device(virtinst.VirtualVideoDevice(self.conn)) def add_default_usb_controller(self): if self.os.is_container(): return if not self.os.is_x86(): return if any([d.type == "usb" for d in self.get_devices("controller")]): return if not self.conn.check_conn_support( self.conn.SUPPORT_CONN_DEFAULT_USB2): return for dev in virtinst.VirtualController.get_usb2_controllers(self.conn): self.add_device(dev) def add_default_channels(self): if self.get_devices("channel"): return if (self.conn.is_qemu() and self._lookup_osdict_key("qemu_ga", False) and self.conn.check_conn_support(self.conn.SUPPORT_CONN_AUTOSOCKET)): dev = virtinst.VirtualChannelDevice(self.conn) dev.type = "unix" dev.target_type = "virtio" dev.target_name = dev.CHANNEL_NAME_QEMUGA self.add_device(dev) def _set_transient_device_defaults(self, install): def do_remove_media(d): # Keep cdrom around, but with no media attached, # But only if we are a distro that doesn't have a multi # stage install (aka not Windows) return (d.is_cdrom() and d.transient and not install and not self.get_continue_inst()) def do_skip_disk(d): # Skip transient labeled non-media disks return (d.is_disk() and d.transient and not install) for dev in self.get_devices("disk"): if do_skip_disk(dev): self.remove_device(dev) elif do_remove_media(dev): dev.path = None def _set_defaults(self): self._set_osxml_defaults() self._set_clock_defaults() self._set_emulator_defaults() self._set_cpu_defaults() self._set_feature_defaults() for dev in self.get_all_devices(): dev.set_defaults() self._add_implied_controllers() self._check_address_multi() self._set_disk_defaults() self._set_net_defaults() self._set_input_defaults() self._set_sound_defaults() self._set_graphics_defaults() self._set_video_defaults() def _set_osxml_defaults(self): if self.os.is_container() and not self.os.init: for fs in self.get_devices("filesystem"): if fs.target == "/": self.os.init = "/sbin/init" break self.os.init = self.os.init or "/bin/sh" if not self.os.loader and self.os.is_hvm() and self.type == "xen": self.os.loader = "/usr/lib/xen/boot/hvmloader" if self.os.os_type == "xen" and self.type == "xen": # Use older libvirt 'linux' value for back compat self.os.os_type = "linux" if self.os.kernel or self.os.init: self.os.bootorder = [] if (self.os.machine is None and self.os.is_ppc64()): self.os.machine = "pseries" def _set_clock_defaults(self): if not self.os.is_hvm(): return if self.clock.offset is None: self.clock.offset = self._lookup_osdict_key("clock", "utc") if self.clock.timers: return if not self.os.is_x86(): return if not self.conn.check_conn_support( self.conn.SUPPORT_CONN_ADVANCED_CLOCK): return # Set clock policy that maps to qemu options: # -no-hpet -no-kvm-pit-reinjection -rtc driftfix=slew # # hpet: Is unneeded and has a performance penalty # pit: While it has no effect on windows, it doesn't hurt and # is beneficial for linux # # This is what has been recommended by the RH qemu guys :) rtc = self.clock.add_timer() rtc.name = "rtc" rtc.tickpolicy = "catchup" pit = self.clock.add_timer() pit.name = "pit" pit.tickpolicy = "delay" hpet = self.clock.add_timer() hpet.name = "hpet" hpet.present = False def _set_emulator_defaults(self): if self.os.is_xenpv(): self.emulator = None return if self.emulator: return if self.os.is_hvm() and self.type == "xen": if self.conn.caps.host.arch == "x86_64": self.emulator = "/usr/lib64/xen/bin/qemu-dm" else: self.emulator = "/usr/lib/xen/bin/qemu-dm" def _set_cpu_defaults(self): self.cpu.set_topology_defaults(self.vcpus) def _set_feature_defaults(self): if self.os.is_container(): self.features.acpi = None self.features.apic = None self.features.pae = None return if not self.os.is_hvm(): return default = True if (self._lookup_osdict_key("xen_disable_acpi", False) and self.conn.check_conn_support( support.SUPPORT_CONN_SKIP_DEFAULT_ACPI)): default = False if self.features.acpi == "default": self.features.acpi = self._lookup_osdict_key("acpi", default) if self.features.apic == "default": self.features.apic = self._lookup_osdict_key("apic", default) if self.features.pae == "default": self.features.pae = self.conn.caps.support_pae() def _add_implied_controllers(self): for dev in self.get_all_devices(): # Add spapr-vio controller if needed if (dev.address.type == "spapr-vio" and dev.virtual_device_type == "disk" and not any([cont.address.type == "spapr-vio" for cont in self.get_devices("controller")])): ctrl = virtinst.VirtualController(self.conn) ctrl.type = "scsi" ctrl.address.set_addrstr("spapr-vio") self.add_device(ctrl) def _check_address_multi(self): addresses = {} for d in self.get_all_devices(): if d.address.type != d.address.ADDRESS_TYPE_PCI: continue addr = d.address addrstr = "%d%d%d" % (d.address.domain, d.address.bus, d.address.slot) if addrstr not in addresses: addresses[addrstr] = {} if addr.function in addresses[addrstr]: raise ValueError(_("Duplicate address for devices %s and %s") % (str(d), str(addresses[addrstr][addr.function]))) addresses[addrstr][addr.function] = d for devs in addresses.values(): if len(devs) > 1 and 0 in devs: devs[0].address.multifunction = True def _can_virtio(self, key): if not self.conn.is_qemu(): return False if not self._lookup_osdict_key(key, False): return False if self.os.is_x86(): return True if (self.os.is_arm_vexpress() and self.os.dtb and self._lookup_osdict_key("virtiommio", False) and self.conn.check_conn_support(support.SUPPORT_CONN_VIRTIO_MMIO)): return True return False def _set_disk_defaults(self): os_disk_bus = self._lookup_osdict_key("diskbus", None) def set_disk_bus(d): if d.is_floppy(): d.bus = "fdc" return if self.os.is_xenpv(): d.bus = "xen" return if not self.os.is_hvm(): d.bus = "ide" return if self._can_virtio("virtiodisk") and d.is_disk(): d.bus = "virtio" elif os_disk_bus and d.is_disk(): d.bus = os_disk_bus elif self.os.is_pseries(): d.bus = "scsi" elif self.os.is_arm(): d.bus = "sd" else: d.bus = "ide" used_targets = [] for disk in self.get_devices("disk"): if not disk.bus: set_disk_bus(disk) # Default file backed PV guests to tap driver if (self.os.is_xenpv() and disk.type == VirtualDisk.TYPE_FILE and disk.driver_name is None and util.is_blktap_capable(self.conn)): disk.driver_name = VirtualDisk.DRIVER_TAP # Generate disk targets if disk.target: used_targets.append(disk.target) else: used_targets.append(disk.generate_target(used_targets)) def _set_net_defaults(self): if not self.os.is_hvm(): net_model = None elif self._can_virtio("virtionet"): net_model = "virtio" else: net_model = self._lookup_osdict_key("netmodel", None) for net in self.get_devices("interface"): if net_model and not net.model: net.model = net_model def _set_input_defaults(self): input_type = self._lookup_osdict_key("inputtype", "mouse") input_bus = self._lookup_osdict_key("inputbus", "ps2") if self.os.is_xenpv(): input_type = virtinst.VirtualInputDevice.TYPE_MOUSE input_bus = virtinst.VirtualInputDevice.BUS_XEN for inp in self.get_devices("input"): if (inp.type == inp.TYPE_DEFAULT and inp.bus == inp.BUS_DEFAULT): inp.type = input_type inp.bus = input_bus def _set_sound_defaults(self): if self.conn.check_conn_support( support.SUPPORT_CONN_SOUND_ICH6): default = "ich6" elif self.conn.check_conn_support( support.SUPPORT_CONN_SOUND_AC97): default = "ac97" else: default = "es1370" for sound in self.get_devices("sound"): if sound.model == sound.MODEL_DEFAULT: sound.model = default def _set_graphics_defaults(self): for gfx in self.get_devices("graphics"): if gfx.type != "default": continue gtype = self.default_graphics_type logging.debug("Using default_graphics=%s", gtype) if (gtype == "spice" and not self.conn.check_conn_support( self.conn.SUPPORT_CONN_GRAPHICS_SPICE)): logging.debug("spice requested but HV doesn't support it. " "Using vnc.") gtype = "vnc" gfx.type = gtype def _add_spice_channels(self): def has_spice_agent(): for chn in self.get_devices("channel"): if chn.type == chn.TYPE_SPICEVMC: return True if (not has_spice_agent() and self.conn.check_conn_support( self.conn.SUPPORT_CONN_CHAR_SPICEVMC)): agentdev = virtinst.VirtualChannelDevice(self.conn) agentdev.type = agentdev.TYPE_SPICEVMC self.add_device(agentdev) def _set_video_defaults(self): def has_spice(): for gfx in self.get_devices("graphics"): if gfx.type == gfx.TYPE_SPICE: return True if has_spice(): video_model = "qxl" self._add_spice_channels() else: video_model = self._lookup_osdict_key("videomodel", "cirrus") for video in self.get_devices("video"): if video.model == video.MODEL_DEFAULT: video.model = video_model