mirror of
https://github.com/virt-manager/virt-manager.git
synced 2024-12-24 21:34:47 +03:00
bfa5762d9e
Fixes weirdness when using addhardware wizard for a customized VM, and makes the code easier to follow anyways.
266 lines
8.0 KiB
Python
266 lines
8.0 KiB
Python
#
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# Common code for all guests
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#
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# Copyright 2006-2009, 2013 Red Hat, Inc.
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# Jeremy Katz <katzj@redhat.com>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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# MA 02110-1301 USA.
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import os
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import logging
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from .devicedisk import VirtualDisk
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from .osxml import OSXML
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class Installer(object):
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"""
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Installer classes attempt to encapsulate all the parameters needed
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to 'install' a guest: essentially, booting the guest with the correct
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media for the OS install phase (if there is one), and setting up the
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guest to boot to the correct media for all subsequent runs.
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Some of the actual functionality:
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- Determining what type of install media has been requested, and
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representing it correctly to the Guest
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- Fetching install kernel/initrd or boot.iso from a URL
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- Setting the boot device as appropriate depending on whether we
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are booting into an OS install, or booting post-install
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Some of the information that the Installer needs to know to accomplish
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this:
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- Install media location (could be a URL, local path, ...)
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- Virtualization type (parameter 'os_type') ('xen', 'hvm', etc.)
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- Hypervisor name (parameter 'type') ('qemu', 'kvm', 'xen', etc.)
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- Guest architecture ('i686', 'x86_64')
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"""
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_has_install_phase = True
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def __init__(self, conn):
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self.conn = conn
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self._location = None
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self.cdrom = False
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self.livecd = False
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self.extraargs = None
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self.initrd_injections = []
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self._install_kernel = None
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self._install_initrd = None
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self._tmpfiles = []
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self._tmpvols = []
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#########################
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# Properties properties #
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#########################
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def get_location(self):
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return self._location
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def set_location(self, val):
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self._location = self._validate_location(val)
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location = property(get_location, set_location)
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###################
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# Private helpers #
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###################
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def _build_boot_order(self, isinstall, guest):
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bootorder = [self._get_bootdev(isinstall, guest)]
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# If guest has an attached disk, always have 'hd' in the boot
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# list, so disks are marked as bootable/installable (needed for
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# windows virtio installs, and booting local disk from PXE)
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for disk in guest.get_devices("disk"):
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if disk.device == disk.DEVICE_DISK:
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bootdev = "hd"
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if bootdev not in bootorder:
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bootorder.append(bootdev)
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break
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return bootorder
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def alter_bootconfig(self, guest, isinstall):
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"""
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Generate the portion of the guest xml that determines boot devices
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and parameters. (typically the <os></os> block)
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@param guest: Guest instance we are installing
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@type guest: L{Guest}
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@param isinstall: Whether we want xml for the 'install' phase or the
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'post-install' phase.
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@type isinstall: C{bool}
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"""
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if isinstall and not self.has_install_phase():
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return
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bootorder = self._build_boot_order(isinstall, guest)
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if not guest.os.bootorder:
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# Per device <boot order> is not compatible with os/boot.
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if not any(d.boot.order for d in guest.get_all_devices()):
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guest.os.bootorder = bootorder
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if not isinstall:
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return
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if self._install_kernel:
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guest.os.kernel = self._install_kernel
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if self._install_initrd:
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guest.os.initrd = self._install_initrd
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if self.extraargs:
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guest.os.kernel_args = self.extraargs
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##########################
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# Internal API overrides #
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##########################
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def _get_bootdev(self, isinstall, guest):
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raise NotImplementedError("Must be implemented in subclass")
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def _validate_location(self, val):
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return val
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def _prepare(self, guest, meter):
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ignore = guest
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ignore = meter
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##############
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# Public API #
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##############
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def scratchdir_required(self):
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"""
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Returns true if scratchdir is needed for the passed install parameters.
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Apps can use this to determine if they should attempt to ensure
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scratchdir permissions are adequate
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"""
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return False
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def has_install_phase(self):
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"""
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Return True if the requested setup is actually installing an OS
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into the guest. Things like LiveCDs, Import, or a manually specified
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bootorder do not have an install phase.
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"""
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return self._has_install_phase
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def needs_cdrom(self):
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"""
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If this installer uses cdrom media, so it needs a cdrom device
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attached to the VM
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"""
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return False
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def cdrom_path(self):
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"""
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Return the cdrom path needed for needs_cdrom() installs
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"""
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return None
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def cleanup(self):
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"""
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Remove any temporary files retrieved during installation
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"""
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for f in self._tmpfiles:
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logging.debug("Removing " + f)
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os.unlink(f)
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for vol in self._tmpvols:
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logging.debug("Removing volume '%s'", vol.name())
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vol.delete(0)
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self._tmpvols = []
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self._tmpfiles = []
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def prepare(self, guest, meter):
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self.cleanup()
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try:
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self._prepare(guest, meter)
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except:
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self.cleanup()
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raise
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def check_location(self, guest):
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"""
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Validate self.location seems to work. This will might hit the
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network so we don't want to do it on demand.
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"""
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ignore = guest
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return True
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def detect_distro(self, guest):
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"""
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Attempt to detect the distro for the Installer's 'location'. If
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an error is encountered in the detection process (or if detection
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is not relevant for the Installer type), None is returned.
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@returns: distro variant string, or None
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"""
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ignore = guest
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logging.debug("distro detection not available for this installer.")
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return None
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class ContainerInstaller(Installer):
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_has_install_phase = False
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def _get_bootdev(self, isinstall, guest):
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ignore = isinstall
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ignore = guest
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return OSXML.BOOT_DEVICE_HARDDISK
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class PXEInstaller(Installer):
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def _get_bootdev(self, isinstall, guest):
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bootdev = OSXML.BOOT_DEVICE_NETWORK
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if (not isinstall and
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[d for d in guest.get_devices("disk") if
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d.device == d.DEVICE_DISK]):
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# If doing post-install boot and guest has an HD attached
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bootdev = OSXML.BOOT_DEVICE_HARDDISK
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return bootdev
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class ImportInstaller(Installer):
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_has_install_phase = False
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# Private methods
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def _get_bootdev(self, isinstall, guest):
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disks = guest.get_devices("disk")
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if not disks:
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return OSXML.BOOT_DEVICE_HARDDISK
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return self._disk_to_bootdev(disks[0])
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def _disk_to_bootdev(self, disk):
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if disk.device == VirtualDisk.DEVICE_DISK:
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return OSXML.BOOT_DEVICE_HARDDISK
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elif disk.device == VirtualDisk.DEVICE_CDROM:
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return OSXML.BOOT_DEVICE_CDROM
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elif disk.device == VirtualDisk.DEVICE_FLOPPY:
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return OSXML.BOOT_DEVICE_FLOPPY
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else:
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return OSXML.BOOT_DEVICE_HARDDISK
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